ML20147H633
| ML20147H633 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 02/29/1988 |
| From: | Haddad S, Hutson J, Pospisil J NEI PEEBLES-ELECTRIC PRODUCTS, INC. (FORMERLY PARSONS, SARGENT & LUNDY, INC., TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20147H620 | List: |
| References | |
| NUDOCS 8803090024 | |
| Download: ML20147H633 (554) | |
Text
{{#Wiki_filter:. IENNESSEEVAll.EYAUTHORIIY SEQUOYAHNUCLEARPUM DIESELGENERATOREVALUAIIONREPORI (DGER) ENCLOSURE 1 RBR X88EA 8S888 b p PDH l
F i k ' TABLE OF CONTENTS I. BACKGROUND II. PURPOSE III. DIESEL GENERATOR VOLTAGE ANALYSIS AND DETERMINATION OF VOLTAGE MARGIN IV. AVAILABLE MARGINS A. DIESEL GENERATOR CAPACITY B. MOTOR VOLTAGE MARGIN C. MOTOR STARTER CONTACTOR VOLTAGE MARGIN D. MOTOR OPERATED VALVE TORQUE AND TIME MARGIN E. OVERCURRENT PROTECTION MARGIN F. DIESEL GENERATOR LOAD SEQUENCE TIMER MARGIN V. EXCITATION / REGULATION PERFORMANCE
. VI. REVIEWERS SUMMATIONS VII. CONCLUSIONS VIII. ATTACHMENTS a
l l l 3
Io BACKGR0VND ,i . TVA performed Sequoyah Nuclear Plant (SQW) diesel generator (DC) preoperational (preop) tests TVA-13B(1) and -13B(2) during the period of August through October 1980 to satisfy the test requirements of [(,. NRC Regulatory Guide (RC) 1.9, revision 0. During a subsequent review of the test results. TVA"identified deficiencies in the test. requirements; specifically, the preop tests did not adequately verify ccepliance to P.C 1.9, revision 0, and TVA's comunitments as documented in the FSAR section 8.3.1.2.1. These deficiencies were documented in Significant ' Condition Report (SCR) SQWgEB8515 (B43 851125 904) on November 20, 1985. Additionally, the Employee Concern program received a concern regarding the technical adequacy of the testing and analysis of the SQN DCs. During ' the subsequent investigation, the Nuclear Safety Review Staff (NSRS) validated several of the concerns and documented their findings-in NSRS Report No. I-85132-SQW. In a' sutsequent review of the disposition of SCR SQWEEB8515 (performed through the SQN Design Baseline Verification program). TVA detemined that the specified corrective action was inadequate and that the required demonstration of the DG's capability to provide adequate onsite power as defitad by RG 1.9 had not been accomplished. This deficiency was redocumented in SCR SQNEEB8715 (B25 870207 035) and was confirmed by a reviuw of the preop tests during the Restart Test program.
. In order to resolve the DG test issue. TVA initiated DG load sequence testing in July 1987. This testing effort utilized the DG loading analysis completed as part of SQN electrical calculations program.
This testing was performed utilizing available plant systems and loads; however, due to the plant's capabilities, the applied loads were less than the maximum design loading. DG 1A-A was found to deviate from RG 1.9 voltage limit reconunendations during recovery from iransients caused by step load increases. CAQR SQp871238 was issued on July 22, 1987, to document this deficiency. Following additional testing, this CAQR was revised to document similar deficiencies on DGs IB-B, 2A-A, and 2B-B. This CAQR was evaluated and closed with no modifications required. During evaluation of the load sequence test data, anomalies were identified in the electrical perfomance characteristics of DG IB-B. Following comparison of the test data and determination of a proposed corrective action, DG 1B-B was repaired (voltage regulator stability setting was adjusted and a ring-tongue teminal lug on the output of the voltage regulator was replaced) and retested. DG 1B-B performed satisfactorily and similarly to DG 1A-A. Using the test results, a voltage evaluation was performed to adjust the loads to the maximum value and to evaluate the low voltage systems. This evaluation was perfomed with regards to the voltage requirements of RG 1.9. TVA initially discussed this calculation with NRC at SQN on January 21, 1988. Based on the results of this and subsequent meetings, it was concluded that TVA would utilize another analytical method using the test data to provido assurance that the diesel generators will perform their intended safety function with margin.
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II. PURPOSE The purpose of this report is to document that:
- 1. The DC test results are bounded by analysis.
- 2. Safety-related systems / components will perform their intended safety function when powered by the DG, with acceptable margin.
III. DIESEL CENERATOR (D/C) VOLTAGE ANALYSIS AND DETERMINATION OF V0'LTAGE MARGIN During the diesel generator load sequence testing, it was not possible to fully load all the motors to their design basis load; therefore, the maximum voltage transients were not obtained for all the load sequence steps. As a result, diesel generator voltage analysis (Attachment 1) was performed to establish the worst-case voltage profile for the 6.9KV and 480V Class 1E power system based on diesel generator test results, and establishes margins that exist in the connected equipment during the predicted worst-case voltage profiles. In order to determine the maximum transient voltage dip, the actual test voltage transients were increased to the maximum loading condition. The increased voltage drop was determined to oe the test voltage drop adjusted by the ratio of maximum
~
design lotd eurrent to test load current. Tables 1 and 2, attached, summarizes these results. The minimum 6.9KV shutdown board voltage was determined to be 76.5 percent
- and the minimum 480V shutdown board and motor control center (MCC) voltage was determined to be 77 percent and 75.6 percent respectively. This condition occurs during approximately 7 to 16 percent of any motor's acceleration time.
4
*All voltages in this document are percent of system rated voltages (6.9KV.
480V) unless otherwise indicated. k-
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IV. AVAILAALE MAGINS a. The voltage transient can potentially ef fect the performance of the diesel generator systees and the components they power. The f ollowing sections discuss each of these itees with regard to transient voltage effects on the components. The available margins between the anticipated transients and the components operation has been identified.- A. Diete1 Cenerator Canacitv Chart I shows a comparison of the ratings for the diesel generators to - the sa:Imum anticipated' design basis load for the h'e aviest loaded , diesel generator (28-8). In summary, it shows that there is 'at'least 8 percent margin betwe6n the man 6facturer's rating and the maximum y design loads for the first 2 hours and at least 2.3 percent margin for greater than 2 hours. This is ace.ptable margin since the maximum load must be less than or equal to rated capacity.
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- 8. Meter Voltace heein In order to ensure that the motors powered by the DG during the ,
vertt-c::: destgr. bas!s event have a4q9 ate voltage for starting e and/or running, a review of the 6.6KV and 460V motors speed-torque characteristics was performed. This review evaluated the unique types of 6.6KV and 460V motors (e.g., safety injection, centrifugal charging, motor operated valves, etc.). i ; a , . . i Using the basic relationship that torque for a ktor'is proportional to the square of the voltage. (See AN51 C50.41 Paragraph 11), we can 1 determine the minimum voltage required to sustain pump motor speed and ' the minimum voltage required to sustain breakaway. Below is a pump / rotor speed-torque curve (figure 1) for the SQN containment spray puep that displays these pertinent characteristics. This curve is typical for NEMA Class 8 motors which are used at SQN. TYP Oit. PUMF/ MOTOR SPEID TCROUE C'.RVES FIGUtt 1
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CHART I MARGINS r. DIESEL GEhERATOR RATINGS vS. LOAD t ENGINE CAPABILITY -STEADY STATE - 4837 - 4750 - 8.3% MARGIN jg 4435 - U d#2 I x 4397 - 19.7 % MARGIN _ , , , , 4278 - (~2.7% MARGIN, , R ATING 3814 -
~ ^ ~~ MAXIMUM LOAD i -- l 0 3 min 2 hrs .
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2 hrs Time MFG's D/G RATINGS O-3 min 3 min 2 hrs CONTINUOUS < ENGINE 4750 KW 4837 KW 4397 KW GENERATOR 5500 KVA 5500 KVA 5000 KVA
. _..~ - - - - .-
For 6.6KV mot:rs and a very 1:rg] 460V mot:r the analytic 1 technique resulted in the following: MOTOR MINIMUM SUSTAINING MOTOR VOLTAGE MINIMUM BREAKAWAY MOTOR VOLTAGE C' TO SUSTAIN ROTATION- - -- - TO SUSTAIN ROTATION (Percent V at Bua) (Percent V at Bus (Locked Rotorl) M C. . 7, m ,
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CCP 64 ' 33-SI 54 32 RER 56 37 ERCW ' ' 63 36 . AFW. '
... 55 35 CCS (480 Volt)* 44 29 CSP 59 27
*At motor terminal The small 460-volt motors are standard NEMA designs; therefore, the miaimum start and sustaining voltages are evaluated utilizing the standards from which they are designed. NEMA MG1-12.37 and 12.38 were used to obtain the locked-rotor and breakdown torque values for design types A and 3 motors for various horsepowers. "Motor Application and Maintenance Handbook" edited by R. M. Smeaton was used to obtain typical data for the punp. fan, and compressor loads. This data corresponds to the points of interest for the motor / load speed torque curve.
Motorloadshavebeenevaluatedtodeterminethemaximumvoltagedipwkich ( still allows adequate torque to sustain the load rotation. For the 6.6KV motor, the limiting voltage for running motors was determined to be 64 percent, and the limiting breakaway voltage was 37 percent. For 460-volt motors the limiting voltage for running motors is 68 percent and limiting
, breakaway voltage is 59 percent. In addition, for a 460-volt motor / pump load, calculations predict additional margin in the rotating inertia of the load with the occurrence of short-term voltage dips (e.g., for 65 percent of 460V for 1/2 second, speed drop of the low inertia pump would be less than 6.18 percent).
TVA sees no adverse ef fect on the mechanical system performance since the-thermal and mechanical inertia is such that a 1/2-second decrease in flow of air or water would have effects that would be within the normal operating fluctuations of these type systems. This assumes the associated motors and controls do not trip as a result of this voltage decrease. Therefore, the minimum 6.9KV margin for the maximum expected voltage dip is 12.5 percent on a 6.9KV base and 6.3 percent (including cable voltage drop of 2.7 percent) on a 480V base. C. Motor Starter Contactor VOLTACE MARCIN In safety-related circuits at Sequoyah, size 1. 2, and 3 contactors'are used. For unit 2 operation, approximate' number of each types of each contactor size are Site 1 Approximately 500 (27 ampere rating) { Size 2 Approximately 60 (45 ampere rating) Size 3 Approximately 15 (90 ampere rating) 0 R
The limiting !;CC contactor circuits are manufactured by Arrow-Hart C Incorporated. 51:e 1 contactors are supplied from smaller control power transformers than larger contactors and experience lower per unit voltage. As such, the size 1 contactors are the limiting application; therefore, the contactor dropout and pickup characteristics of Size 1 contactors were investigated. Tests were performed at TVA's Chickamauga Laboratory using new and used contactors from SQN. These tests yield a minimum drop out voltage of 54 percent and minimum pickup voltage of 73.6 percent on a 110V base. The corresponding required voltages on a 480V base are 49.5 percent and 67.5 percent respectively. -
Conclusion:
- 1. Dropout Using the adjusted test voltage from Attachment 1 the adjusted voltage anticipated at 480V MCC's is 75.6 percent; therefore, the minimum margin is 26 pe' rcent above the required voltage of 49.5 percent (54 percent on contactor base of 110V).
- 2. Pickup The adjusted voltage anticipated at the 480V MCC's is 85 percent when a MCC contactor closes concurrently with the starting of a 6.6KV motor and 75.6 percent when there is a delay such that the contactor picks up at maximum voltage dip. These values are above the minimum required voltage of 67.5 percent (73.6 percent on a contactor base of 110V). Therefore, the micimum cargin is 17.5 percent if contactor closes concurrently and is 8.1 percent if there is a delay.
D. Motor _ Oeerated Valve (MOV) Torque and Time Martin All MOVs that would be actuated during the loading sequence for a design basis event were evaluated for increased stroke times due to transient voltage dips. All MOVs under consideration are rated for a minimum start voltage of 77 percent
- and can develop 100 percent torque at this voltage. Since motor-operated valve voltage varies over its stroke, it is
' appropriate to examine the average voltage. The average voltage experienced based on the adjusted load conditions for the loading sequence is approximately 95 percent; therefore, the voltage margin is 18 percent.
In addition, all MOVs required during this time have a minimum of 5.3 percent design margin in their stroke times. This was determined by the design criteria safety limit minus the plant testing results which results in the folicwir.gt of the 58 valves under consideration, 37 have greater than 100 percent margin,18 have greater than 10 percent margin, but less than 100 percent, and 3 greater than 5 percent, but less than 10 percent margin. It should be noted that these margins are not sensitive to increases in the transient voltage dip.
*This val !e has teen adjusted from 80 percent on a motor base of 460V to 77 percent on a system base of 480V.
Io Overcurrent Protection Marain All motors that are load sequenced have their overcurrent protective
.. devices set at a minimum of 200 percent of locked rotor currect to oneure that tripping will not occur. Additionally, the load will not trip inadvertently since the transients under consideration are less than one second in duration and actuation is at least 10 seconds.
F. Diesel Generator Load Sequence T8.mer Marain J In order to detennine , the load sequence timer. margin calculations "2751Ad and "DG TIMER RELAYS" were reviewed. "DG TIMER - RELAYS" (Attachment 2) addresses the affects of sequence timer inaccuracies upon DG loading by calculating the minimum time between load steps. Calculation "2731A" (Attachment 3) calculates the maxinum time it takes to provide power to the sequenced loads. Both calculations are based on the methodology presented ISA 67.04 "SETPOINTS FOR NUCLEAR SAFETY-RELATED INSTRUMENTATION USED IN NUCLEAR POWER PLANTS" and . Reg Guide 1.105, "INSTRUMENT SETPOINTS FOR SAFETY-RELATED SYSTEMS."
"DG TIMER RELAYS" calculates the minimum time interval between loadings by calculating the root-sum-square (square root of the sum of the squares) of the random errors asociated with two adjacent relays. The root-sum-square technig';e is addressed in ISA 67.04 Also note that there is one systematic error associated with these relays, a bias error due to ambient temperature changes. Since all .
relays are located in the same esbinet, all relays will experience the same ambient temperature changes; therefore, this effect cancels out for adjacent sequence timers. The results of this calculation C are sunenarized in Figure 2.
"27S1A" calculates errors associated with each timer in turn (errors calculated for only one relay rather than adjacent relays) since the parameter of concern is maximum time to make electric power available to a particular load. This means the biss error associated with temperature must also be included in the accuracy. The results are for a concurrent loss of offsite power and safety injection initiation, and are summarried in Figure 3.
These calculations previously resulted in a change for the auxiliary feedwater and component cooling system timers and these figures reflect this change. i e v
DIESELLOADSEQUENCING Figure 2 ( SUNNARY OF "DG TIMER RELAYS"
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SUMMARY
OF "27SiA" lhF ktf tef bh ffckf 1 18h !! n , u o 2, so no 24o (-, e. ,..t. Lt.!! 12.5 ti.t3 !!.15 27.65 13.45 45.25 219.85 !!i;35 ( -see sete 2 (seconds) este 1 - letance timer setraints (prevlhi for comparissa purreses).
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O ' Table 3 summarises the effect of the. voltage transient effect on motor starting time and its ef fect on load seguence time interval including timer C accuracy and repeatability. The analysis accounts for.the overlap of acceleration between the SI and CCP for the worst case.
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Table 3 _, _,l -; ', 6.6 KV MOTOR ACCELIRATION' TIKE 'i ' . .. . , , f' .
> \ . s WORST CASE MIN. TIME ACCELERATION TIME 3 MOTOR TERM INTERVAL _
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MOTOR VOLTAGE PU SEC MEASURED MIN. VOLT FOR 1001 RATED MARGIN 6.6KV BASE (FIG.2). FROM TEST FIRST ONE SEC VOLTAGE FOR BETWEEN IN SECS E 100% AVERAGE THE ENTIRE (3)&(5) THE REST SEC PERIOD SEC SEC (1) (2) (3) (4) (5) (6) CCP 0.867 2.44 2.15 3.33 2.99
- SI 0.833 3.84 2.80 3.39 3.01 0.45 RHR 0.811 3.13 1.83 1.85 1.39 1.28 ERCW 0.782 2.4 1.56 1.67 1.20 0.73 ATW 0.778 6.25 3.46 3.77 3.22 2.48 C CSP 0.798 22.4 2.56 2.79 2.35 19.61 r TIMER INACCURACY !
A 2.44 r. A , 2 $ r 1 MINI.T! INTERVAL TIME ACCOUNTING FOR
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Margin is not applicable since CCP and SI pump motor starts could overlap; however, this condition has been considered in the calculation, and it has been established that this overlap will not cause any additional drop over what has been observed during testing. In conclusion, the analysis (Attachment 2 and 3) shows *5at there is acceptable margin between the start of any two motors to allow full voltase recovery of the first before the start of the second for the worst-case set of start signal offsets generated by the l sequence timers. l i A
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o , V. EXCITATION / REGULATOR PERFORMANCE Attachment 4 is a report from NEI Peebles--Electric Products Inc., regarding the voltage response characteristics of the voltage ( regulator / excitation system installed at Sequoyah Nuclear Plant. The purpose of this report is to further explain why the Dc was responding in the manner soon during the test. This report shows how the effective reactance values of the generator varf with the exciter / regulator response time and saturation. Effective reactance as discussed herein is defined as the generator's transient reactance plus the effects of the exciter / regulator during transient load conditions. As a result, the analytical results should be conservative when compared with actual measurement. The following is a comparison between the test data and the characteristics predicted in tha NEI Peebles report. D/G 1B-B test data was compiled fcr this comparison-(Figures 4 through 8). Figure 5. "D/G 1B-B SI-Start at 5.56 sec" will be analyzed as an example of exciter ' response and the time las created by voltage regulator transition from "full-on" to "full-off." Immediately prior to motor start, the generator terminal voltage was still above nominal since the transient load current was not fully decayed. As a result, the voltage regulator control current (Icont) was at approximately 4.5A, and the exciter field voltage was at a minimum. Thus, in an attempt to lower the terminal voltage, the regulator was driving the saturable transformers into full saturation. Upon start of the motor, the generator terminal voltage (%Vt) sharply drops due to the sudden change in load as seen by the generator. Sensing this, the voltage regulator begins decreasing control current to cause an increase in exciter voltage. However, there is a time delay of approximately 10 cycles from the initial decrease in control current until there is a resultant change in exciter voltage. It takes an additional time delay ! of approximately 30 cycles for the control current to decrease to a value that will allow the exciter voltage build-up to transition to its maximum rate. As see.n from the curve, minimum terminal voltage occurs at approximately 20 cycles. At this point, the exciter has not yet reacted to the voltage decrease and the field current is still provided by the generator flux instetd of the axeiter voltato. Therefore, the volt m l
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I ; .O .\\ m I- - Co s . _g Q ! ' \ .O 1 t.1 . y s.....**...* - l ~.. N) . -O l 4*' i i i i I I : O i i b O O O O O O O r0 N ~~ O O cn CD N (o a las U H l I I O i l i l l O O O O O O O O O 00 O w o , O CD T m u - O a >* O I I l l I i O O 000 O O m u O D W tO a d O l l l l 4 i O O O O O O r0 o O m O O N N - 8 l I (s O o I I e m i u i I l- FIGURE 8 l l s m a ssa s + -e w *- -4 - T m en+-m - I * \ e 'VIA REVIDERS SUIStATIONS l 1 The following sununaries were prepared by Mr. Charles Concordia and l ( Mr. Russ Allen at the request of the Tennessee Valley Authority. h I l C e 2/21/88 'g Charics CcncErdio, PE (C:nsulting Engin cr) 702. Bird Bay Drive West; Vpnico, Ficrida 34.242; (813) 488-8252 London Square, 12 Hampton; Clifton Park, NY 12065; (518) 371-6091 1 w . ,- .e A. - Coments on Sequoyah Nuclear Plant Diesel Generator - Starting of Motor Loads At the request of TVA, I have considered the performance of the diesel 3 ) generator; particularly the successful starting of several motor loads in sequence, and the results of calculation and test of the motor starting. A major question was the larger voltage dip found in test as compared to the calculation in some cases. The generator field excitation is, supplied by an "SCPT" system. In this system the generator field voltage is taken from both generator terminal voltage and armature current is such a proportion that just the right voltage is supplied to maintain the terminal voltage (whatever it is). That is: Efield " Vterm + d Xd Iarm. Thus, theoretically, is a load (for example, the primarily reactive load of a stationary motor) is suddenly applied, the voltage will drop in a very few cycles, to a somewhat lower value and simply remain at this new value. It should not drop further because the field voltage has automatically increased to supply the required greater field current. No voltage-regulator action is required. However, since there usually is a voltage regulator, it will send a C signal to increase the field current further, to bring the terminal voltage back to normal. In the SCPT as originally designed, and in the present generators, the voltage regulator acts by shunting part of the supply voltage (V t + j Md Ia) in effect changing the proportionality factor 2 From this brief explanation it would seem reasonable to calculate the voltage dip by simply using the initial drop (after the subtransient (amortisseur) currents have died away in a few cycles), and, as I understand it, this is what was done. In the present case, the calculation of subsequent starts was co= plicated by the previous motor leads, which were considered as constant-apparent-power loads. This should be realistic. . I have independently calculated several cases to explore the effects of the previcus loads and of the approximation to the conventional assumption of constant field flux linkage by assuming constant voltage back of generator direct-axis transient reactance (i.e., assuming E' as an approximation to E'q in the diagram below) (see Reference 1). Eh ! }Xcr o. ( -/ c , A / / b p' h" . C (Y) 1 .. I" '" ^E 4e "m * - " .g- O g From my calculations , I concluded that both effects were rather small. For ' example, in one case: Previous Load Voltane Dio Constant 22% 11.9% E' 44% 12.9% E' 22% 11.6% E'q : This is a 1% increase for doubling the previous load and a 0.3% decrease for , using the more "exact" method of constant E'q. Then to explain the observed discrepancies there seemed to remain two , possibilities: the transient reactance. assumed was too small or the transient . caused by the last previous disturbance had not yet disappeared. Further inspection of the test results showed that inde,ed the transient had not disappeared so it was not necessary to assume a wrong x'd (although a few percent error in x'd is not unconsoon). . In several cases the generator terminal voltage was still a few percent high when the next motor load was applied. Referring to our previous explanation of the voltage regulation this means that the field supply voltage was (or should be) considerably reduced so that in the first place, the field voltage did not insnediately increase to a value sufficient to maintain (or limit) the . dip to the initial transient value so the voltage decreased further, and in , the second place, the regulator was too slow to counteract this decrease. ( Two observations can be made: First, fortunately since the larger voltage dip started from a higher level, the actual minimum voltage tras not smaller than that for an initial drop from 100% voltage, at least in all the cases I considered. i Second, this behavior following a transient conditions is not a new f i phenomenon. I worked on one of the very first SCpTs (see Reference 2, 1961 AIEE Trans.) and in fact predicted and observed the same effect. Figure 8 of ; Reference 2 shows 'he application of load and the removal of about 75% of it i after 0.833 second. It was very interesting to see that on the removal (at V = 0.97) the initial transient rise of 10% was increased by 3% more because i of the previous transient and the resulting maximum voltage was V = 1.10, l i exactly as would result from removal at steady state and V = 1.0. (This was the calculated result. The test result was slightly smaller.) This effect, , of arriving at about the same eaxirum or minirum voltage, is very si Ilar to ' ! that c Worved in the present, tests and discussed above. t In the present tests we could have hoped that there was sufficient time to arrive at a steady state for each new load appli:ation. However, no harm seems to have resulted, as the minimum voltage was not lowered. Further, I understand that a faster (and different) regulator may eventually be installed. 2 1 t e * . In the calculations and test of Referenco 2, the object of load removal af ter only 0.833 second was precisely to evaluate this possible - transient effect' , simulating approximately the starting of an induction motor. This was why we: ( had to go further and calculate the voltage-regulator response as well as the initial dip. We may add that one aspect of the SCPT exciter is that, because the field voltage should so inanediately to the value required to prevent i further decline, the voltage regulator does not need to be very fast. However, new types have been developed since, substituting solid-state regulators for the original "saturating" regulators. Since we feel that the test"results have been adequately explained, it' remains only to consider the extrapolation to full motor-load conditions. As the new motor at each step will take somewhat longer to accelerate, there will be somewhat less time for the transient to decay. However, in the test and calculation results so~far-this transient effect has been negligible on the-minimum voltane. (The interval in the old AIEE paper was only- 0.833 second). 3 Moreover, the initial shock of new load is not' increased by this extrapolation, only the previous load and the acceleration times are increased, so the effect is small in any case, as our discussion above has indicated. The effect of generator speed dip was briefly discussed. In fact some frequency drop may ba beneficial rather than harmful. Induction motors respond to volts / Hertz rather than volts, at least over a moderate range. Thus, a motor will start as well or better at 95% voltage and 95% frequency than at 100% voltage and frequency. If the minimum voltage observed at 95% frequency is, e.g., 80%, the motor starting behavior (and the previous motor load also) will be about as for 84% voltage at normal frequency. The running motor load will be decreased slightly but for only a very brief time. Finally, from all of these considerations, and from my understanding of the motor minimum-voltage requirements, it would seem that the starting performance should be entirely adequate. In spite'of this opinion, we cannot resist mentioning a few factors that could be considered if_. it is deshed to make further improvements.
- 1. A faster-responding voltage ronulator, and one that would not suppress the built-in exciter response of the SCPT.
- 2. Keeping the voltage setpoint at, e.g., 105% as long as the diesel em.,m --o v- .-u w e .-u, , . v menn yter me, &
au ws c.i c e . ./ r m e ; ..s u . f. a : :.1.:e all lo cc, ,mve been started.
- 3. Increasing the load current compounding (the j x da I term). This may mean increasing the contribution from the current transformer of the SCPT.
References:
- 1. "Synchronous Machines" (Book) J. Wiley & Sons, 1951 by C. Concordia (See Chapter 9, pp 200-201, and p 36)
- 2. "Performance of a New Static-Magnetic Exciter and Voltago Regulator for k Round Rotor Marine Steam Turbino Generators" P. M. Tabor, and C. Concordia, AIEE Trans., Vol. 80, by D. F. Talcott, June 1961, pp 141-148 (See Figures 8, 2, and 3, and App. II) 3
*J, .s.ET Y NS$' ^'
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,e . REVIEW-(- by R. E. Allen Per TVAs request, I have made an overall review of the background, approval. general results and conclusions of the TVA DG Voltage and Margin Analysis (DGVMA) effort relative to determination of start sequence load step voltage dips. Others have made a detailed review of the test results or the calculations and their specific technical assumptions. I have concluded that, based on the DG reduced load test results and the DGVMA, there is reasonable confidence that the Sequoyah diesel generator units have the capability of starting accelerating and running the required. safety-related loads with acceptable voltage margins. { This conclusion is based on the high degree of conservatism in the TVA approach to determining the voltage drop and margin in each start-sequence load step. First, the voltage drops are observed from a worst-case scenario comprised of the composite of the worst-case load steps from all four diesel generators, a condition that cannot physically occur. Second, it is assumed that the largest random load is switched on simultaneously with each start-sequence load step, a condition that is highly improbable. Third, the
.:a;;r Jart--n c- .a .e.. age ca r t.: ese.. taaa step has c'een cecermined by test with the remainder, which is due to the difference between the pretransient scheduled and test loads, determined by a conservative analysis. '
SC/3999F
l
.n . -
l l In the latter case, there are three components to the load step-voltage drops; l that contributed by the locked rotor (starting condition), that contributed by the pretransient test load and that contributed by the delta between the pretransient scheduled and test loads. Of these, the first two are determined by test and third by approximate but conservative calculations. Of the three, _the, lock,ed, rotor component causes the majority of the voltage dip. Part of l the remaining five to ten percent is determined by test. Consequently, the third component, determined by analysis, was expected to be and was found to be very small.
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Table 4 SMPfARY OF MARGINS ' COMPONENT PERvENT MINIMUM MARGIN 6.6KV Motors - Sustain 12.5 460V Motors - Sustaining 6.3 Contactors - Dropout 26.0 Contactors - Pickup 8.1 MOV Performance and Stroke Times 18% (Voltage)/5.3% (Time)/56% Torque Diesel Generator Loading 2.3 VII. Conclusions Based on the summary of margins' listed above in Table 4 we have" determined that the diesel generator will perform its intended safety function by starting and accelerating all required loads within the required limits, with acceptable margins even when considering worse-case voltage and sequence timer inaccuracy and maximum motor starting time. Furthermore, it is concluded that the test results have been bounded by analysis. L
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Attachment 1 ( Diesel Generator Voltage Analysis (B25 880223 305) ( l l l l 1
TVA 10697 (DNE 646) * "' DNE CALCULATIONS TITLE PLANT / UNIT D t E SE L G E N E R. ATO R. V OLT A 6 E $ M ARGIN ANALNSIS S&N Q N IT 5 l $ '2. [ PREPARING ORGANIZATION KEY NOUNS (Consult RIMS DESCRIPTORS LIST) DME G.E B btESEL G EN E R ATO $L , VOLT AGE , c ALCU L AT I ON S Ci BRANCH /PROJECTIDENTIFIERS Eacn time these calcuistioes are issued, preparers must ensure that the original (RO) RIMS acct uion number is filled in. Rev (for RIMS' use) S AN - E3 - O t ey RIMS accession number APPLICABLE DESIGN DOCUMENT (S) B 25' '88 0223 305'
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Q G - 1. Cl R S AR SECTIONIS) UNID SYSTEM (S) , _, , ,. , 8,3 R .y; ,# - -_ . 7, ,, , 3 , , j Revision 0 R1 R2 R3 Saf ety related ? ECN No. (or indicate Not Applicable) Yes @ No O N /A Statement of Problem Prepared A.N,fAL TO E ST A W S H THE MA0 CL9cd '
- E ~
Checked S . M AE U M D A lt QQ __ TOR S (, D G) RE SULTIN G F ROM A
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Revi O BOUN DtN G c A5 E. E V A LO AT10 N OF TME AOy tL1 ARY P OW E R SYS T E.M y PER FOR M ANCE FOR D E s tC N B A515 Dd EVE NT LOAbtNG. AL50 CALcOLATE z/z List all pages added 9 MI NI MU M VOLT A GE AT COMWEcT E D
**y by this revision. G Ru tP ME NT ust NG Tkts B00NotuG E
i List all pages deleted C A5E A N A LNs 45 T0 suou Tu AT 5 ;e, - by this revision. 5A5ttM. ret.ATEb SNST E M S /CtM POME MTS
$6, List all pages changed utLL PER Foh iMEn t INTENoEo S AF LT N by this revision. FONCTION u M t. N Powt.Ett EN t u t 06 ,
unu Accrpinste u AnciN . These calculations contain an unverified assumption (s) 55 AR COMPLt ANCE REVIEW ' that must be verified later. Yes O No Q 7b LE Tuts C ALcV L ATIO N E ST A BLt5M Es 0 THE W ORsT CASE v0L7 AGE P Ro gits 50 g. TkE 6M kV ANO 466V CLASS lE P o w E 9. SNST EM o kSE D ON O t E S E t, GENERATOR TEST R E s u LT C , kwo 1') THE M ARG tN S TwoT E x tsT tw 1%E coNuEc7 E b E &Ut P ME NT b u RI N G TME PRE 0lc TE D WORST-c AS E VO LT AG E pro FtLES , I"Y HAS BEEN DETE R MINEb TWAT TwE DG w t L t. PERFORM M INTEND 6D 5ATETY F uNCT t 0N Gv ST ART tN G ANo Acte LE R AT ING ALL REAutREb LO A0 5 M11MtN 7ME RE qul Q E b LtugTs, wttu Acc E PT A BLE M ARGINS EVE N CON 5tOEStqG wCEST case v oLT A G E ANO 5E &UENC E T I M E Q. \ N A c c u Q.A C M ANO M Av tMun , MOTOR ST ARTIN G Tl M E , F O RT MER MO RE , IT 15 CON CLu b E D 'T M AT TwE
'l E ST RE 5 0 LT S MAVE BEEN BOUNDED BN A N A LN s t s ,
CALC- CONSLSTs OF TOT AL OF 277 PAGES, O u.c,oi.im aad iio,e caicuiai,oni .n Rivs serv.co Center. u.c,or.im ano o.ii,or. O O u.cror.im aeo r to,n caicuiat oniio. Return to G. Hunley- . ,,,,,,, cc: RIMS. SL ;6 C-K P-17 9 SB-K X-6 2 b7 ,, 4
REVISION LOG
Title:
OG V o l.TA G E AND M ARG IN AN At.M S is S ata - E 3 - 015 Revision o
- u. DESCRIPTION OF REVISION 4,,%',,,
K I J . k k. e . i e f e , l TV A 10$ 34 (EN DES 4 70) a e
- - - - - , , - , , , - . . . .-. , - - . . , , , . . , , , - - , ., , -...re, -
f NEP-3.1 g( Attachment 6 Page 1 of 1 i CALCULATION INDEPENDENT REVIEW VERIFICATION FOPJt ' su n- E 3 - cis O Calculation No. Revision Method of independent review used (check one or more):
- 1. Alternate calculation method
- 2. Testing method
- 3. Other method v' Justification (explain below):
Methed 1: Identify the pages where the alternate calculation has been included in the calculation package and explain why this method is adequate. Methed 7: Identify the QA documented source (s) where testing adequately de.gonstrates the adequacy of this calculation and explain.
." gethed 3:
( Justify the technical adequacy of the calculation and explain how the adequacy was verified (calculation is similar to another, based on accepted handbook methods, appropriate sensitivity studies included
- for confidence, etc.).
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rn escem ma a nern s m BAsc-b ,, om Accepma rew8eeg pc-russt. f Q . r- h AL , / _ A-23-@@ C.-E4s ign Vfrifier Date (Independent Reviewer)..
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. TVA 489H (EN OE5-248) TENNEOSEE. VALLEY AUTHORITY .
swEtt or CueJact bG VOLT AG E i M A RG IM ' A N ALM S t S PROJECT SQM - E3 - Ol9 Computed of CWol DATE 2/22./88 CHECNED SY DATE Q FSAR S E CT 10 N 8.3 4 AVE BEEM REVIEW E D FOR Ct M plt A N C E BASEb ON C AlcV L AT t 0 N ESU LT s TWE c AttVL AT 10 N RES U LT S Skow THAT THE INTENT OF Q.G . l . Ct IS S ATIS FIE D w tT k THE EycEPTt0M oF O VE 2 V o LT A G E , Twls WAS BEEN bocVMEN"tED IN A C A GL R ti S Q, P 8 7 12"S 6 . Tl4 n s CAGR i M AS 3EE N CLOSED WIT M NO P H N S I C A l. M O DI F I C A T 10 N S , i O f b l
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TVA 449H (EN DES 2 78) TENNESSEE VALLEY. AUTHORITY '
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- A N At.4 515 s g g . E,3. ogej y comevTeo .Y c. r.o DATE 2[U/8 b CMSCMED BY .DATE ; Q,l 1 TA E L E OF CONT E N T S t.0 PugposE i-2.0 ASS U t 4 PT I O N S 4 t
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APPEttS'v - A T A EU L A T 10 h) 0F T E.ST D AT A An - At4 APPEOS'V - B c o p r a.c T e O t.) Top s clR 00 LE LOAD B1- B34 I
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( couT'D) APP EN D l% - D Lo AO SERUENCE Tt ME n NTERV AL bl- b36 E V ALU AT t O td APPEN DtY - E MOT O R suSTAtNING AND MtM . Et - E2t BRt A RAW AN Vo LT A G E APPENDnX - F CABLE VOLT AG E DROP F1- F41 s APPENDIV -G ST ART E R Cott DROP ouT V0LTAGE G t - G 27. APPENoty - M ton 7 ACTOR Pi ct< U P VotT A G E Mt - H tB APPENDtY - 1 J usT) F i c ATt O M OF INST ANT At4E005 Il- 13 SETTING oF M OT O R P fl01 E G lV E D E Vt c ES APPENDtY - 1 OVER V ol.TAGE AN A LN S t s 31- 310 A PPEN bIX - k. MOV ST R0k E TIMES kt- k15 APPEMD\X - L DG t0Ab M A R. G t M Lt - L4
bkN E3 - 019 Propared _ gRy ______gagg 2l2 sl 88 1.0 PURPOSE y37;gjgg
- 0c!e 2-/1g;/g _.
Sheet i of __ The purpose of this calculation is to establish the load margin for the diesel generators (DG) resulting from a bounding case evaluation of the auxiliary power system performance for -design basis event loading. Calculate the minimum voltages at connected equipment using this bounding case analysis to show that safety-related systems / components will perform their intended safety function when powered by the DG, with acceptable margin.. l , 1 l 1.1 PROCEDURE The basis of this calculation are actual field test results of load sequence t,esting of all four diesel generators for SQN units 1.and 2. The DC date obtained by testing was analyzed for each load sequence step. The minimum voltages at each step were compared and the lowest voltage for the step was selected to establish a worst case composite DG voltage profile for the 6.9KV and 480V shutdown boards. During the diesel generator load sequence testing performance, it was not possible to fully load all th motors to their design basis load; therefore, the maximum voltage transients wore not obtained for all the l load sequence steps. In ordt.r to determine the maximum transient voltage, the composite worst case test voltage transients were adjusted h -4e-for the maximum loading that would occur for a loss of offsite power concurrent with a loss of coolant accident (LOOP /LOCA). This maximum
/
loading is called schedulo loading henceforth. 8 .
The criculttien modifisd ths composits tsat voltego profilo to pegducs c conservative voltage proflie which accounts for the most severe bounding A case evaluation of factors not enveloped by actual testing. All of these bounding case factors do not occur simultaneously on any one diesel generator. By determining a bounding c'ase value for each factor, and then combining their bounding case factors, this calculation provides a conservative estimate of some concerns. However, it ensures that the analysis has provided a bounding case evaluation of all concerns. From these adjusted worst c ar,e voltages, the worst case voltages were calcula*.ed at the 480V Motor Control Center (MCC), 460V motors, and 460 MOVs. The cable drops v. sed to calculate the above voltages were the worst cable impedance identified for each of the MCCs and loads to bound the analyyis. The cable drop evaluation and field test . .results are document in Appendixes F and A respectively. The voltage analysis methodology and detailed calculations are documented in Appendix B. Conservate far, tors used to bound the voltage analysis include the following: A. The composite diesci generator voltage profile based on the worst ' case load sequence transient voltage dips for all four DCs. B. The scheduled load profile based on the worst caso loaded DG (LG 2B-B). s G N E 3 - 0 \C; i (. 2. ...nfd....._ uain.2 l n I a a
- w. h .; f oct2 sh 54%
Sheet '2_ of l l
\
C. The c ntretcr drapout, pickup cnolyclo'b s:d cn:
- 1) Maximum control. circuit length of 5350 feet which is the maximum-of all Mcc control circuits. This results in a very conservative analysis since typical circuit length is 1500-2500 feet.
- 2) Smallest control transformer of 100VA.
- 3) Combined load of one size 1 contactor, one solenoid, and one timer.
D. Considers all running motors as constant MVA loads which results in a more severe voltage transient. e E. Does not :onsider the boosting ef fect of the running induction motors providing a generator effect during a sudden drop of bus voltage. This effect should reduce the voltage transient. j s s & M . E 3- 019 : ( Pf epcr /d O Octe , 2 M M L. ! v,atiro
$ 3 octo2/zggg Sheet _ of 9
i TVA 481H (EN DES-2 78) TENNESSEE VALLEY AUTHORITY ' snest 4 or cu2J2c7 bG VOLT A G E 4 u ARGlu A N A LM S ) S PROJECT SOM ___ courutro er seN-E3-019 ctha.) onts 2jr2-/88 cHecuso eY oats 2.0 ASSUM PTIONS 2.1 P RE T R ANStENT RUMMIN G LOAoS ARE TREATED As coNST A N7 MVA LO'A O ( cousERVATIVE ) 2 .2. FO R T H i s ASSUM PTION, SEE A PPE NDlX - E S M . E. 3 2.3 Fo R TuESE ASS OM PTg ogg , gqq A P P E d blX - 6 ? M . G3 2
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tvn as9H itN ocs 2.ra) TENNECOEE VALLEY AUTHORITY.. CMeer 5 or su2J::ct D G V O LT A G E' Aub M AQGlM AM ALNS LS PRoJtcT 54N san E3- 015 Md co e urno or oars 2 2lga casenso av g oars gggeg 3.0 s o U RC ES OF DE stG N tuPOT tuFOR M Al\0N (REFERE t4cES) 3.1 Calc. SQM- E3 - 002 REv. 7 32 IC F. 37- 999 - bG IA vitto 7EST 33 ST1 111 - bG IB FIELb TE%T 34 STI 77 - DG 2A FLELD T E ST 3.ej sTI 78 - Oc 28 F t c.Lo TE s1 f 36 CALC. OE1. E EB c AL 001 REv. 9 r 37 CALC. SON. APS - 00 6 , REv. 3 3.8 CALC. S &N - APS- 010 REv. 2 3.9 CALC. bG 7tMER RE t. A M S REV1 D ATED '" B f 3t [ B7 agu 90 4253B0l'224c 3.10 motor B AT A suEE Ts ' r A. st Puu p , D A7 E o 2 / 21/ G 9
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' Sheet- \3 of 8.0 Results of Voltate Ana1Ysis and Determination of Available Martins The voltage transient can potentially effect the performance of the diesel generator systems and the components they power. The following sections discuss each of these items with regard to transient voltage effects on the components. The available margins between the anticipated transients and the components operation has been identified.
er 8.1. Diesel Generator Voltate Analysis 2 Tables 1 and 2, attached, summarizes the results of the DC voltage analysis. The minimum 6.9 KV shutdown board voltage was determined to be 76.5 percent and the minimum 480V shutdown board and motor control center (MCC) voltage was determined to be 77 percent and 75.6 percent respectively both for approximately 16 cycles. The lowest motor terminal voltages are as follows: 6.6 KV motor 76.2 percent 460V Switchgear motor 74.3 percent 460V MCC Motor 74.5 percent 460V MCC MOV 74.6 percent i L The calculations supporting these results are in Appendix B.
Vs o RST CAbE 6.9kV f$ U S V O LT A G E CORRECTED rOR SGtE bO LE LOAD 1O R TO M ART + ADD}Tionk ST A RT S E O. . PRE 7 RAM SOU RCE DG LO A D D6 LO AD PU otP PU DlP TOTAt_ P u untat+4ue MOTOR TtME vot.T AGE oG r itto TEs1 uistoutE r itt o out 70 Pu dip B u s VstTacE sEC. PU [9(.s.3.i] TEST LOAoulG [g 4g3 {g , gj 0 0 @ @ @ @ @ M"'" O 63 CCP 2 1. O O Ct 2A 17361549 1206142. o g74 o,o o,174 o.g3cy st 9 m
- o. c19 t 2a i102 l'25 B i77134.7 o.16 2 O. ot o O.17 2 O.819 h RHR 10 0.969 2B 1291 l'2 M 20251 M 5 O 15 9 o.013 0.17 2 0.797. -
E RCW 15 1.00t iB 1417 130-3. 2382(20!1 O.187 0. 012 o.19 9 0.802 c ~u
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.ioash (sP4rP 18 O 1. O 2A 3083133.? S B3712't 7 0.200 0.012 0.212 0.788 l~s N o
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gHECXE0h DATE 1/i' /C# R_ Sheet- 19 _ of TABLE 2 W O R ST, C A S E. 480V ST M b . BD.VOGAGE CORRECTED FOR SCHEDULE LOAb PRETRAN P t.) b)P A bb\T t 4 M AL To7 % puum, S E O. 7 tME VOLT AG E F ttg o D SEC. PU t.o[btuc P U b)P tus vot1 Act O g) T E S7 q) pirrtetuct g l@*03 e LO-93 0 n. 0 6 - - -
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.2 i. 0 0.16'S 0.o 0.\63 o. B s7 9 t.ot? o.167 o.ot0 0.17 7 0.84 to 0.994 o .14 B o.ols o.161 o.833 19 1. 017 o.183 0.012 0. 19 9 0.B22 to 0.975 o.\79 o.ot7 o.19 6 o.779
~50 1.033 o.188 o otS o.201 0.832.
lBo (CSP 4 F P) 1. 0 12. 0.23' o.012 0.242 0.77 ,
- 200HP FP wAS S1 AR1E O \1 t T H CSP v A
A 010 S T E. D 1 HE FIELD TEST dip 70 CO M PE N S AT E THE E r F E CT OF 200 HP F. P ( 0. 0 5; 1 P U DIP) N OT E : t o t. u u u O immu @ .SEE 1 A t t.E . A2,
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b s s.N - E 3 - 015 P. spared CLM Octu I" I8 ' , Veri!!ad h Octe 2./ 2319 0 Shaet 4 of 8.2 Effect of Random Loads , TVA has determined that the D ald be capable of accommodating the application of a random process load block (i.e., sixteen loads that are controlled by process parameters such as flow,. pressure, etc.). We have assumed that 14 of these loads are running and that two of the largest loads are starting to calculate the additional voltage drop. The increase in the 6.9KV , and 480V system transient voltage dip resulting from this random pr,ocess load block is 1.9 percent, and 2.4 percent respectively. (See Appendix C) i L 9
r S & ki - E ~6 - O g ey Ngu e .. . & _ cie 21"l 8 8 VeriUed h 0 010 2.,/1L/ff. Sheet l'I or n.L ;;;h .ti:n 1: f::2--.ted in A;prnd!x c. O' 8.3. Motor Starter Contactor Voltare Martin In safety-related circuits at Sequoyah, size 1, 2, and 3 contactors are used. For Unit 2 operation, approximat- number of each types of each contactor size are: Size 1 Approximately 500 (27 ampere rating) Size 2 Approximately 60 (45 ampere rating) _ Size 3 Approximately 15 (90 ampere rating)
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All of these are of the same manufacturer, Arrow-Mart incorporated. Size 1 contactors are supplied from smaller control power transformers than larger contactors and experience lower per unit voltage. As such, the size 1 contactors are the limiting application; contactor dropout and pickup characteristics of Size 1 contactors were investigated. Tests were performed at TVA's Chicamauga Laboratory using new and used contactors from SQN. These tests yield a minimum drop out voltage of 54 percent and minimum pickup voltage of 73.6 percent on a 110V base. The corresponding required voltages on a 480-volt base are 49.5 percent and 67.5 percent respectively, f L
s gea - E 3 o t*>
Conclusion:
Preparaa. gg tJate [ ( 1. Dropout Verified h Octo _2 /2 3h, Sheet iB __ of ., Using the minimum adjusted _ test voltage from Appendix 5 the minimum adjusted voltage anticipated at 480V MCcs is 75.6 percent; therefore, the minimum margin is 26 percent above the required voltage of 49.5 percent (54 percent on contactor base of 110V).
- 2. Pickup The minimum adjusted voltage anticipated at the 480V McCs is 85 percent when a MCC contactor closes concurrently with the '
starting of a 6.6KV motor and 75.6 percent when there is a delay such that the contactor picks up at minimum voltage. Therefore, the margin is 17.5 percent if contactor closes concurrently and is 8.1 percent if there is a delay. These minimum voltage values are above the minimum required voltage of 67.5 percent (73.6% on , a contactor base of 110V). I A I
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3 on . 6 b O try Prepsroc h Octo zl2M98 Verified 00!0 1Il}/? E., Sheet M of 8.4 Motor Operated Valve Torque and Time Martin All MOVs that would be actuated during the loading sequence for a design basis event were evaluated for incroased stroke times due to transient voltage dips. All MOVs under consideration are rated for a minimum start voltage of 77 percent
- and can develop 100 percent torque at this voltage. Since there is more time above 77 percent than there is below 77 percent (more over-travel than under-travel) in the travel time, it is more appropriate to examine the average voltage. The average voltage . experienced based on the adjusted load conditions for the loading sequence is approximately 95 percent; therefore, the voltage margin is 18 i
percent. In addition, all MOVs required during this time have a minimum of ; 5.3 percent margin in their stroke times. This was determined by the design criteria safety limit minus the plant testing results which results in the following: of the 58 valves under consideration, 37 have greater than 100 percent margin, 18 have greater than 10 percent margin but less than 100 percent, and 3 greater than 5 percent but less than 10 percent margin. , i
*This value has been adjusted from 80 percent on a motor base of f
. 460V to 77 percent on a system base of 480V.
4
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s&N - E3- 0 0 Prepared _ Gb Date 2 l2@ a Verified C V
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Sheet 20 of 8.5 Overcurrent Protection Martin Due to transients during the loading sequence, all switchgear motors have their overcurrent protective devices set at a minimum of 200 percent of locked rotor current to ensure that tripping will not occur. Additionally, the load will not trip inadvertently since the transients under consideration are less than one second in duration and actuation is at least 10 seconds. 8.6 Diesel Generator Load Sequence Timer Martin In order to determine the load sequence timer margin calculations "27SIA" and "DG TIMER RELAYS" were reviewed. "DG TIMER RELAYS" (Reference 3.9) addresses the effects of sequence timer inaccuracies upon DC loading by calculating the minimum time between load steps. Calculation "27S1A" (Reference 3.17) calculates the maximum time it takes to make electric power available to the sequenced loads. Both calculations are based on the methodology presented ISA 67.04, "SETPOINTS FOR NUCLEAR SAFETY-RELATED INSTRUMENTATION USED IN NUCLEAR POWER PLANTS" and Reg Guide 1.105, "INSTRUMENT SETPOINTS FOR SAFETY-RELATED SYSTEMS."
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S G N - E ) - O l c; Prepared CPal Date 2Dl31. Vorilled h Dole 2 /2 3/pi Sheet 21 et "DG TIMER RELAYS" calculates the minimum time interval between loadings by calculating the root-sum-square of (square root of the sum of the squares) the random errors associated with two adjacent relays. The root-sum-square technique is addressed in ISA 67.04. Also note that there is one systematic error associated with these relays, a bias error due to ambient temperature changes. Since all relays are located in the same cabinet, all relays will experience the same ambient temperature changes; therefore, this effect cancels out for adj acent se,quence timers. The results of this calculation are summarized e in Figure 2.
"27SIA" calculates errors associated with each timer in turn (errors calculated for only one relay rather than adjacent relays) since the parameter of concern is maximum time required to make electric power available to a particular load. This means the bias error associated with temperature must also be included in the accuracy. The results are for a concurrent losc of offsite power and safety injection initiation, and are summarizied in Figure 3.
These calculations previously resulted in a change for the auxiliary feedwater and component cooling system timers and these ( f figures reflect this change. 4
DIESELLOADSEQUENCING sau. es-ois Figure 2 ' 7' 'I - S CN20l"IO DATE 2- >f- D o R_-
' S u f1N AR Y OF "DG TIMER REL AYS" '
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Variations shout ideal set;oint are str.n for altehtait error combinations. Einima laterval times sh n are I:r Icare 7:st of th im of th Stuates ($RI$) :mbinaticas of errors (if 4200 tirer Figure 3
, SUNNARY OF "27S1A" ii btt ih Y t b tt d R h il th 2l) 3 )
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- l Lt.25 12.5 16.t5 21.15 27.65 33.45 45.t5 213.25 !!6.35 (~see note 2 (sectais) este 1 - letuence tirer setnints (provided fst comparista turreses).
ante ! - fi e ft:q initial,lts(s tf offsite 1%er unti) lentJacludes traderseguenet timer timeout, diesel cleture.strerater runup tt-e 15 9 9
Table 3 sunwrizes the voltage transient effect on notor starting tine and its effect on load sequence time interval including timer accuracy and repeatability. The analysis in Appendix D accounts for the overlap of acceleration between the 51 &nd CCP for the worst case. TABLE 3 6.6 KV MOTOR ACCELERATION TIME 1 I I I l l lWORSTCASEl MIN. TIME l ACCELERATION TIME l l lMOTORTERMl INTERVAL l l { l \
\ MOTCR l VOLTAGE PU l SEC l MEASURED l MIN.VOLTFOR l100% RATED l MARGIN l l l6.6KVBASEl (C) lFROMTESTlFIRSTONESEC lYOLTAGEFOR lBETWEEN l l l l l IN SECS l&100% AVERAGE lTHEENTIRE l345 l l l l- l l THE REST, SEC lPER100 l SEC l l ]
\ \ \ SEC l l l l l l 1 1 l l_ (1) l (2) l (3) l (4) l (5) l (6) l l 1 l 1 l l l 1 1 1 lCCP l 0.867 l , 2.44 l 2.15 l 3.33 l 2.99
- l l l
\ 51 l 0.833 l 3.84 l 2.80 1 3.39 l 3.01 l 0.45 l lRHR \ 0.811 3.13 1.83 (f lERCW l lAFW l 0.782 0.778
]
l l 2.4 6.25 l l l 1.56 3.46 l l l 1.85 1.67 3.77 l l 1.39 1.20 l l 1.28 0.73 l l l 3.22 l 2.48 l l CSP l 0.798 l - l 2.56 2.79 [ l 2.35 l --- l l l l 1 I I l l TIMER INACCURACT
/
2.4a # 2 l 5 l l, MINIMUM INTERVAL TIME ACCOUNTING FOR TIMER INACCURACT
- Margin is not applicable since CCP and 51 purrp motor starts could overlap; however, this condition has been censidered in the Appendix 0 and it has been established that this overlap i
will not cause any additional drop over what has been observed during testing, saw.E3 015 P:.rparo d . CN Cal? *l ^ l8 b Yorified Oc!c k 7-h2&- Sheet- ?3 _ _ of - .
s a w ..E 5 - 0 6 Prepa. od - Cf' 1 Octo zl2M8% Verified Octe M/P R ( .~.x. 3.. L :.,. - i l 8.7 Diesel Generator Capacity Chart 1 shows a comparison of the ratings for the diesel generators to the maxi =um anticipated scheduled load for the heaviest loaded diesel generator (2B-B). In summary, it shows that there is at least 8 percent margin between the manuf acturer's rating and the maximum scheduled loads for the first 2 hours and at least 2.3 L percent margin for greater than 2 hours. This is acceptable margin i since the maximum load must be less than or equal to rated capacity, o
- C 8.8 Motor Voltare Martin i
In order to ensure that the motors powered by the DG during the ' worst case design basis event have adequate voltage for starting and/or running, a review of the 6.9KV and 480V motors speed-torque characteristics was performed. This review evaluated the unique l types of 6.6KV and 460V motors (e.g., safety injection pump, l centrifugal charging pump, motor operated valves, etc.). ; I Using the basic relationship that torque for a motor is proportional to the square of the voltage (See ANSI C50.41, 'f! paragromh 11), we can determine the minimum voltage required to ;
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sustain pump motor speed and the minimum voltage required to sustain breakaway. r i
ShN - E1 - 019 Prepared Gb Date 2 23188 ( Verified h._ v Dato 3M L/d -- Sheet 2c7 of Below is a pump / motor speed-torque curve for the SQN containment .I spraf pump that displays these pertinent characteristics. This curve is typical for NEMA Class B motors which are used at SQN. - r TYPICAL PUMP / MOTOR SPEED-TORQUE CURVES i FIGURE I P
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RECUIRED MOTCR $ TART PUVP SPtNN TOROVE CURVE TO T
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For 6.9KV motors and a very large 460-volt motor, the analytical technique resulted in the following: MOTOR MINIMUM SUSTAINING MOTOR VOLTACE MINIMUM BREAXAWAY MOTOR VOLTAGE TO SUSTAIN ROTATION
- TO SUSTAIN ROTATION (Percent V at Bus) (Percent V at Bus (Locked Rotor)
CCP 64 33 SI 54 32 RHR 56 37 ERCW 63 36 AFW 55 35 CCS (480 Volt)* 44 29 CSP 59 27
*At motor terminal The small 460-volt motors are standard NEMA designs; therefore, the minimum start and sustaining voltages are evaluated utilizing the standards from which they are designed. NEMA MC1-12.37 and 12.38 were used to obtain the locked-rotor and breakdown torque values for design types A and B motors for various horsepowers. "Motor Application and Maintenance Handbook" edited by R. M. Smeaton was used to obtain typical data for the pump, f an, and ccepressor loads, j This data corresponds to the points of interest for the motor / load speed torque curve.
1 g u . E.3. O W Prepared- O Date 2l2 SIS S L. Verified h _ Date a./2.1/gR ShC s t_ 26
- Cf
x In conclusion, motor loads have been evaluated to determine the maximum voltage dip which still allows adequate torque to sustain the load rotation. For the 6.6KV motor, the limiting voltage for running motors was determined to be 64 percent, and the limiting breakaway voltage was 37 percent. For 460-volt motors the limiting voltage for l running motors is 68 percent and limiting breakaway voltage is 59 percent. In addition, for a 460-volt motor / pump load, calculations
^
predict additional margin in the rotating inertia of the load with the occurrence of short-term voltage dips (e.g., for 65 percent percent for 1/2 second, speed drop of the low inertia pump would be i less than 6.18 percent). TVA sees no adverse effect on the mechanical system performance since the thermal and mechanical inertia is such that a 1/2-second decreaso in flow of air or water , would have effects that would be within the normal operating i fluctuatiens of these types systems. This assumes the associated motors and controls do not trip as a result of this voltage decrease. Therefore, the minimum 6.9KV margin for the maximum expected voltase dip is 12.5 percent of 6.9KV and minimum 480V margin is 6.3 percent of 480V. i t l l San . Es- OW ( , f Prepared ON Ccte 7h3 ISS ( Verified Cete 2f2 3/ g Shact- 27 _ _ o f __ l 1
9.0 Conclusions - TABtt 4
SUMMARY
OF MARGINS COMPONENT PERCENT MINIMUM MARGIN 6.6 KV MOTORS - SUSTAIN / BREAKAWAY 12.5/39.5 460V MOTORS - SUSTAINING 6.3 CONTACTORS - DROPOUT 26.0
'CONTACTORS - PICKUP 8.1 MOV PERFORMANCE AND STROKE TIMES 18 (Voltage)/5.3 (Time)/56 (Torque)
DIESEL GENERATOR LOADING 2.3 L~ Based on the sumary of margins listed above in Table 4 we have determined that the diesel generator will perform its intended safety function by starting and accelerating all required loads within the required limits, with acceptable margins. The margins are not only sufficient to allow for test inaccuracies, but provide the capability for the DC to start and accelerate all required loads concurrent with the random process load block. Furthermore, it is concluded that the test results have been bounded by analysis and the DC meet the intent of Regulatory Guide 1.9. gau . E 6. O\ry Precored O Date Eh3 I83 L-
/
Verified _. Date kgg, 28 _ of Sheet
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8ECAUSE THE Mootit c Ail 0 N oE TME LO A O S E G,y E N C E STE,P FOR THE CCS POMP AND AFW PVMP BA5 WOT BEEN 00NE ON U MlT . t ( E 0 R. U N ti . 2. RISTAET), 54ME Ab"J UST M E N T ON T< t.E S V LT D A* A FOR THEL E TW0 STEPt ON U N \T - t VJ E EE Mh0E S H . A7 ( SE E } IN ORDEA 10 4E ABLE TO C O M P A R E. TwE L o W E. s T VO LT A C E FOR ALL F OUR DLE S E L S . AM EV A MPLE OF THE A b 3 0 $T H E NT CALCUL ATtbt4 is tuCLu bE O AS PART op 7 6 41. 9 . A l s g , A g , , RE5VLTS , THE wensT eME co u postTE v o LT A G E PQ Q F I LE S FOR THE ! 69kv ANO 480V STDN BetEns ARG sa09u tu rtGs , . A t ! Au t A 7, e O
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7.45 7 45 , TIME 1N TERVAL 2 32 2 41 '234 2. 5 2 32 Ky Acc 980 110 4 l 1008 1220 980
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- 2. v 6 40% INT G. G G 7 06 i 72 7 39 72 (CcP) V@ Go*/, INT 7 87 7.65 } 7 92. 7 91 7 92.
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i TvA 4ses ten ocs.a is) TENNESSEE VALLEY AdTHORITY_- Sweet El or sue;scr DG ~ VOLT AG E AMb M AR GIN A N A LYS \S encascr S Q L1 S RN - E 3 - 015 I comeurso av ct.Sd oate 2/17 /8 8 cHac"to " p - *^'*-2llt[%Cg AP P E N D l X- B CORRECTlON FOR SCHE DU LE D LO O P + LO C A LOAD i i s l l [ s e e ---, -,.-,._____,,..,_,,_.,7,.,,,..,,,m.,, ,,._,,,y.,_ , _ .
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TVA 489H (EN DES 448) TENNESSEE VALLEY AUTHORITY sweet Bt or suoJrcT Db b'TA/ E AuD MA%IO kOALYSIS pno;ge7_ MG Mij - E 5 - c15 courutto av WoJL oat: 2/22/88 cuccxso av o^'c 2.[2 y p Puneoss. Io 0 ouse.g.vA7ivCLY C oMPERSATE TH e. TE.6T R EGu t.Jf 5 To loECTipY Tn ts Lo nd E.ST EreecTED VouTAca s AT Ta e.
- 6. *) K.v ., 46CV SutTc% EAR , Aco 460V MCC.'s Fca A CC.SWu itAsis EvsuT d.ou d.u ra RE.uT dtTH A Loo r . Tats is Acc.oMPLtSHED BY dcMPEusAmos Feg Tar DipFExeues Barutsu Taa SCHEcuLED (, LOC A / Loop) pre.TP.tsubtEuT LOAD Auo Tas Actu At PacTRADtEur LOAo AvAttAste D uaiu s Te.sT1u r .
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TVA 489H (EN DES-2 74) TENNEOSEE VALLEY AUTHORITY - CHet7 60 er surarcT Dl.a \/ot tat a Ano M AR.t iu AuAs vsis ,n o;< cT So.d SQLl E S - OL E courufro ev. C^ted oatz 2/22/83 CHECNED SY DATE g Pace.couas TH E. 0 lRt tut 8 5 t.Q W D e P ld.T i TH e, P % g c StTu AT tod GaueRATor. 4 Yk y 2 a f 7id- HoTes. 4 STARTEo Betus s
- SuuulOG LcAo AT ME OF HOTOR. START Tse Tr.,sTeo Ruuuttia LOAD IS LESS THAu THE MAXIMLAM
(/ Ca.stuu Ruuuius LCAD. THE TELT RuuuluG LOAD MuCT DE IUCRE ASED Aus THe AcomewAi 6. TAG E DROP ( 6V ) MubT BE SuSTRACTED FgoM Tas Lowest Te.steo Vot tac.e (V7) To OSTAlu THE Lot 4 F sr F w e.c.T E D VouTA4e. THa Auxiu Aa.v svsTEH LOAD FoR. THE. MoST NEAVtL_Y LoAoso Disssu 6G4ERATOR. ( 2.B-B) WAS OrEp lu THf 6 AuAt.ysiS Fog At.t. LoAo STEPS . THib PROVIDE $ A Soucius CASE LoADI4G foR. As t D r.= 's . l [ ]
l TVA 489H (EN DES 2 7sl TENNES3EE VALLEY AUTHORITY surcr E4 or
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su2 JECT C*6 Yot.TA6E Auo MAR.citi AuAuvois rao; cr $M SQ d - E S. -OIS cou,uiso .1 da o.,c 2jz2/ a a esic co av oar: 2/21/ gg METHODOLOGY VI, Il , KWI
- TasT vat.u,E Va,It,KW2. Amoso DROP Dus To
- V 2.' lucre.ASEo Ruuutu6 LeAo.
THe AeoiriouA' \/c TAcas. CIPs Dus. To Tse. DIFFER 640.E BETWE.F.d Tsa Pa.a.TRAUSIEMT SCREDML.ED 4MD TEST LcADS MAY OE. APP RoXIM ATED BY APPLyluG THE. RAT IO OF THE C.u RP.E UT 0.HAdGE. CAu$EG 6Y IHe. ADJuSTMsur FRoM Tas TssT To { Scaeout.eo PRETeAusie.uT LcAo s , To Tsa Tscr VOLTAGE p s.c P . Ir VI
- F'RETRAM SIEMT Vot.TAGE. FnoM Test 11 PasTRAusis ur d.uate.uT FRom Tasr KWI: PRETRAusis u T KW F8cM TEsr VZ : MauiMuM Voc.Tu a Due To Morom SrAar Fa.on 'TELsT IZ : Rasui TAUT duzes9r (bu + STAeT ) AT VouT% s VE Fgos Te.sr K!J L : KW AT MiuMuM VoL.TAae V2. Feom TEST AI7 C,9AuGs lu Quee. cut Dus To STActruG AKVA CHAu4e tu R.uuuiuG LoAo AIe = c aA u c.E tu tunte.uT Fo a. C.NAu6Elu kVA AV ' Test VouTAss DeoP Av' : Vot.TAac Dace Dus. To S c9 tout.s LoAo V't Minimum B us Vot.T AG E Dua To $c.14GDut.ED LoAC)
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TVA 489H (EN DES 2 78) TENNE 2SEE VALLEY AUTHORITY - surer 65 . or susJacT Db YoLTA6E AuD MAR.GR\ AUALYS)5 PaoJacT SQL1-E3-015 co eur..,., o.fra zIniga { . . . c"*""" fre ^ 2/22 /g g AI 7 = I t li - li tf 4KVA = KVA (Se.asoutso) - KVA (Test) A KVA A KVA g7 ' _ _ V 3' Vg 6V i AV : Vi -V e THau THE MiuiMus Bus VoLTAGs. Dua To Tas Scasoutao LoAC (V 2') lS 6tV EM OY THE Pas.TRANJsisg7 VoLTAGG FRcM TAs Tasr (Vi ') Raou.cco B>y THs VOLTAGE DROP { Das To ScaEcut.so LOAo ( AV ' ) As vz ' = Vi - av ' WHERE TsE YoLT AGE DRO P Due. To SCHEoutso LOAD (AV ') Is THe TasT VOLT AG E D rop (, AV ) AoausTso By Tae RATro OF Tua GuaneuT 0.HAuG ES 6Austo SY THE CHAuGE [d PR.ETR AdSI E kJ T KVA As lu V:' = V - ( 6V) [ 017 i 41T + 01* ) Auo THE ADDITIOUAL YoLTAGE DIP C.AuS E D BY THE Dmrceaue.s le SeasouLeo Auo Test PU TRAu sieu r VOL.TAGES 16 AV ' - AV AootT100AL \/oLTAGE CIP 5 (10 7o @ Vg .,q ) Base VOLT AGE t
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TVA 489H (EN DE5 2 78) TENNESSEE VALLEY AUTHORITY surer S(a or cueJacT- Ob Yot TME Atle MAcc.iti Ati Atysis eno;cer 500- E S -ols comevtso er o[N on 2/22 /8 a essenso my oATE 1 THiS METHO DOLOGY (aivas A CouSER.VA71VE YALUE OF MinisuM VOLTA 4E. 61UCE Tais EVALuATicU 15 Doue. NITH OcusTAt3T KVA LcAos Auo dasLae.Ts THE EFFECTS OF Tas VeuTAos R.ar.mLALATOR. / E XC\ tea. By Assumius REf.au L ATOR. NAs ApusTco To THE l LiiTi At PRETRAndt\EldT LoAo. se t 6
- - - , - - - ~ , - -
TVA 449H (EN OES.2 74) TENNES!EE VALLEY AUTHORITY sacar 67 or sus;EcT % Yo LT A 6e Au e H Ae < iu Au At.YS I S pno;rcT SQL1-EL 015 courvtio .. cd@ o vc 2 j2 21 gg c usc u o .1 o4rc 2.pgg To De. Ten.Mius THe HiuisuM VoLTAce. AT Tse 48cv snuToown So A R.o Du e. To LoAoiua DlFFERE.ue.s AT Toa 6.>xv STou f5cAE:.o , Tae 480V Bus VOLTAGE. dip WILL Ai.ss Sa lucre.AsED BY THE 6AMs. PER.C1GTAsE As Twa G.*> Kv Sus 6 Tacos. OlP. THE 6ALiuuATap ApotTiauAL YoLTA65 ORcP ( AV'- AV) 15 Aposo To THe 460V Test VOLTAGE Die. THis METHoo 15 C.outeRVATivE Siuce Tae DippenEuc.E BETue.eu SeasouLs.c Auo Ts.sTeo LeAo Occues PmMARit'f AT Tus. G. > Kv BoAzo. ADDITIOuAL ADJuSTMEuT5 ARE MAos. Fo ra DI FFER EUCE.S B E.TW a s.u Sc H E DU LE D A u g Te.ST E.D L.oAD AT- Tse. 4-80V BOARD As oaFi uco a.s.uo w . AT ?. see.. STcp (.CC.P STAT.T ) Tae Tact LcAo is 530 KvA G REAT s.R TH Au S c.H E D U L E LcAo. NE.UCE th ApausTsaur To VouTAus Die Is Raquigeo. AT 180 s e.c. . A 2.009 e Fine Pump WAs STAnTeo CoucuRasuTLv Idtra c.sP. Tae Fie.Lo TEST DIP dA5
- AoausTao To dosesueATs Fog Tea EFFse.T OF 200 HP Fine PUMP. Tae AoausTraur OF Tae. Fiato Test V'oLTAGE DIP (, $ H EE.T A 7 ) AT Ta e. G.)Kv SnuT oowu BOAR.o Due To STAct OF Fine. Puse Ac.ous i s 3. */ 7o . THE l AppsTHaur CF THe. Fiate Tast %LTAaa dip (SassT All) l AT Tas 48cv sauroown acAn.o Dua To sTAzr ot:
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vV A 489H (EN DES-2 78) TENNESSEE VALLEY AUTHORITY swect 6 B er SU3 JECT PROJECT s o.w - F 3 - o 19 co - useo .v er.A oat 2/n la a cw.c=. .v gg oara yn g Rs.suti. s . TABLE.5 BI Auo 52 , ATTAC, HEP 3 sum MAR.IIE S THEbE RE.suLis. THE MlulMUM 6, *) KV SHuTooWu BOARD VOLTAGE WAS DETERMIM E D T o B E. 7G. 5 Pe.R.ceuT OF doHIMAL Aap Tae. WutMuM 480V SauToowu SOAR.o Auo Mtc. VouTAas LjAS DETERMIME.D I'm OE 77 PERCEWT Aup 75.6 Ps.Res4T OF L]o MtM AL Res ese.niveLy , SoTH Foe. APPRoxiMATst.y ifo CYcue S. TAFSLE b3 SUMMARIZE.6 THE G.G Kv Moro8. TERMtMAL VouTAr Ed. Tae. L.owtsT G. G Kv Morce. Tag.MiuAL VouTeos ls 76,2. Peg.cs.wr OF doMiM AL.
/ Tse.l.owasT 460V motor TERMiMAL VOLTAGE. Pso F8cm 48oV 'cTDij So is 74.3 PER1E.uT OF 460V.
Tss Lowest 4 GOV Moroa. Aue Mov TensiuAu Vou, Aces AR.c. 74. 5 Auo 74.I.o Peaccur or 486V R Espac.Tivs Ly . 1 e
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E o -s } w o RsT CASE 6.9 kv Bus voLTAG E : o -E CORRECTED FOR SCHE DU LE LO AD h 4 PRI O R TO ST ART 9 h 5 ADD Ttot1M ST A RT G E O. . P RE T R Att 2*00RCE b6 LO A D D6 toAn PI) OnP PU btP T OT A1. P u t M u u utt '
}P MGTOR T l t4 E 70L%6E DG O F t ELD TESI SculLOLE FtLL O DUE TO PU OtP BUS VtLTACE P SEC. PU [905. L l] TEST LOAnlHG [,g 4 g) {g) _ gj g p D @ @ @ @ A
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- 1. O O C1 2A 17361545 12061 42 o.g74 o,O o.17 4 o.835 3 #,., g
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SI 9 O.991 2B 1102 121B 1717 l_34 7 0.16 2 0. 01 0 0.17 2 O.819 5 RHR 10 n Z h 0.969 2B 1291 12 %5 202513t5 O. 159 0.013 O.170 0.797 I f k
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E RcW 15 1.001 e > 18 1417 L30.3 2382 L30ft 0.187 0.012 0.19 9 0.802. I , 5 5 AFW 20 c .Ct 6 5 2A 1903132_5 304913t_ o.183 0.017 0.200 0.769 @ o Ccw P 30 1.008 2B 2495135t 35261299 0 . 110 0.013 0.12 3 c.885 E C594FP 18 0 t s
- 1. 0 2A 30831333 3837 12't.7 0.200 0.012 0.212 0.788 ut 5 p p& ,
Z & 1 Y ' P I te A 20 0 HP FP WAS ST A RTED W IT H CSP. A Ao3usT Eo Tut p ic t o TEs T o \ P To cot 4 PENS ATE THE EFFECT OF 200 RP F.P ( o i P = 0.039PO) o wore : ron co to u a Q) Tano @ Aao @ se E T Aete - At
. ~ tvid89H (EN 015 2 781 - TENNESSEE VALLEY.' AUTHORITY
~
swact 610 ' or suoJccT b G -' V o t.T A G E Aun M ARG L td A N ALY s t s pao 3 cy sqa S at4- E l - 015 courutto as aped oArc 2 /17-l 8 8 cHec u o or part lg/g i T A E t. E. - 62 W O R.ST CASE 480V STMD. BO . VO CI AG E CORRECTED FOR SCHEDULE LO A D PRETRAM P t.) DIP Abbm ou AL To"IAt pu Mig S Ed. TIME vo(T AG E @
-" lEL D To toAbtuc PU DIP Bu s $J 0LT AGE S E C. - 'O PU g TEST g p i ppgq q,m g (@+g] [g.g 0 1.06 - - -
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'2 t. o 0.163 o.o o.56 3 o.837 t,
3 t.o!7 o.167 o.on0 o.17 7 O.84 lO o.994 c. (48 o. 013 0.161 O.833 19 t. o t7 c.tas 0 . 0 1 2. o. 19 5 o. 8 22. 20 0.979 0.17 9 0.017 0.19 6 0.779 30 1.033 o.t88 o.ots o.20t O. 8 3 2.
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A 07 0 S T E. b 7 HE FIELD TEST OtP To co MPE N S ATE THE E F F E C'1 0F 200 HP F. P ( 0.oc g pu eip) y N 01 E : c o t. u t t o (3 Tuau @ sE E TA%LE. A7.
TVA 481H (EN DES 2 78) TENNESSEE -VALLEY AUTHORITY $Hett 61) or
'su JacT D6 Y6LTAGE AUD HARGIM ALI ALY515 eno;ccr SQN SQL3-E.E ole couruiro av af.i o ,a 2/z2 j a 8 esecxco av oars g g 7 T AME - P_, 3 MINIMUM MOTO R TERM)N AL VOLT AGE ouR1M G M OT O R ST A RT \ M G MORST CASE.6A CALCULATED MOTOR VOLT A6E MOTOR kV BUS Volt AGE. Ten utw A g V o LT A 6 E D rop
( T A Bl.E - Bl3 1 H */o
- 6. 9 kV 8 ASE 6. 6 k.v BME CCP O. a 3 c; 0,B29 o.867 0. 6 51 o. Bt9 0. B t G o.863 o,3 RHR. O.797 0.794 o.83 0."S EQcW o.B02 0.766 0. B 01 "
'S . 6 AFW O.76ca 0.762 0 . i ci 7 0. 3 CSP 0.78% 0.783 0.3\S o.52 WORST CASE V O LT A G E. Drop O U R i t4 G RUNN\N G
, FoR EROW uoT O R 15 o , 8 4 */. or 6 . '1 k V
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tvA u)H (EN DES-2 731 - TENNE 2SEE VALLEY AUTHORITY twetT 6Il cr sus;EcriDG VOLTAGE Atle MAE(.alu Auxtv sis goo; cr seN seN.Eg.Otcj arW comevico av e41: 2 l22 /88 executo av oars gg/g g WO75T' CASE tA 1 u i tA U M 4 80V STON EO. VOLT AGE is o.77 PU AT Abov worst tesE VO LT A6E DROP BE THE E M 4SoV sl o w, BD. AND MOTOR FEb FROM 4 8 0 V sT bu . Rb 15 c. 027 P u ( EEFER A P PE t4 0 t v - F sB . Fit ) WORST case taoTos T t ata t u 4 L VOLiAGE CEO F20M 4 Boy sTDN. 3D is 0.77 - o.027 = 0.7 43 PU OR 7 4, 3 '/, { l l 1 l l
Tvtl <89H (EN DES 2181 TENNE'J SEE VALLEY AUTHORITY CHet7 613 'or sU2 JECT D6 oLT A & E. UD NAllL(alu AuAtysis goo;Ecr s GtM S RN - E3 - 015 cowevrio ey aPd oave 2l22l88 cs cxio y ur s . W O RST CASE M tW \ MUM A80V ST D M . f6 0. VOLT AG E 15 0.77 Pu AT 4 80V .
\NoRST case VOLT AGE d Ro P EETWEEN ABOV 57DN. BD. At4 D 4 BOV ta c c 15 0.0\4 90
( RE FE R To A P P E t4 B I M - F su Fit ) W ORsT CASE M i ta 1 M U M 480V Mcc volt AG E ts 0.77 - o. 014 0.796 PU on 7 9 6 */. worst CASE volt AG E DROP BETWEEN 480V STDN. 4D AN b MOTOR FEb FROM Mcc is 0.025 PU ( REFE R TO A P pen o\N - S SH Fit ) WonsT CASE 4 60V MoTo2 T E R u g ta A s. V O LT A. G E is o.77 - o.02 5 :. o.74 S PU oa 749 '/. V40 itST CASE VO LT AGE DQoP 6 E T v4E E 4 460V 57 014 %d, f Ata D M OV 15 0.024Pu ( 2GFE9 70 APPEt4biv F 5% Fit ) L WORST CASE 460V M OV 7E R M iy t L V0L7 AG E ts 0.77 - O.024 . 0.7 4 6 P U OR 74.6'l.
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TVA 489H (EN DES-2 78) TENNESSEE VALLEY AUTHORITY CMitt Dlf.* or-susarcT. Ola YoLTA6E Auo MAesW Atirtvsis roo; cr seN
'~~ SQd-E.5 015 courvis o av OVM oars 2. l 22. l 8 8 csecuco eY oATE Q QQj C A L d u t A 7 t o k3 s F o p, RUNMIMG ScuEDULE D LO A D , SEE RE F . 3.1 FOR TEST BATA .
SLE AppEN b W - A 2 L 0
, - , , , - - - ,m,--- - --,.n- - - , ~ . , - - - - -
sact- 25 17 o,
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,l SIP @ 5 secs SQ N - E 3 -015 I co eurco. (2 % rc _ 2 //4t/# 8 doA ewe ro ene 2 /r 4 ) et?
TEST LoADtt4G VI 11 VI s PRE.7 R AN s t E N7 VO LT A G E
= G. 84 xv v2,12 , xw2 In 2 PRE T R A9st E NT CU R9 E N7
=. 93A kW1 : _ P R E T e Atasi t nT _ xw = 1023
- c. o s e t s k vit/- r2 vs 1 t = 09285 en = 218' kvAt = 1101. 6
. V2 : M t u t to u tA '/') t.7 A r. E tVE T0 M0700 CTA9T : 6 72 SY I2 : R E S U LT All~t c uc c E N1 ( Qukut N G 4 51 8- G i t M G')'12 f 'I =240A KM7
- k V4 At M itt)t.s Q t n vo(T A G E. vq =. 13ro.6 cosot =
tw2 / fi v2.12 = 0.5741 02 = 5 5' C H A N G E. tN CU9 RENT
- 4 IT
=
1 2 L92 - Ii Ub
=
24oL5s* c)3 318
= 137 66 +)l96 6 - 86 36-j3 4 F4 f [
s
- 5121+j l6 2.o G
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= 170 [,]2 43
( h
setti _ _616 or D'G - 2f3 SQ tJ -E 3 - 016 coworto Shl cart _2,//V/88 ' cascato DEdl care 2/i4I 7 2 _S c H E D U L E. LO AD IN G Ruwnt oc to A D s j4;o,4x w 4 j 9 73,7 gygg
=
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=
3 8 "i 4 +]5G9 5 = G E8 8 l 55 8 o It = C l4 A N G E IN CUR C E NT FOR 6kVA
= d kv A o kvA E v2 6 vi
= G88 8 _,
6888 f5 K 5 72. {E M,. 8 4
=
69 52 - 58.14 = II. 3 3 [55.S 4I t 4 o I e. = 51.Bl+[16200*b44594l 2 : 57 71 + j 17I 4 7
/S L$ :
= I80.92.[]I4 8 .
seu tbic) er oG - 2 f3 SQN -E 3 -ols ecueursoYGioarc _2[/9/87 extengo ~* ho l can [/14 '/ 2 2 ' dV = T E. S T VO L'T A G E - DtoP
=
vi - vt = (o84--511 = l. (2 Vo LT A G E D 9. 0 P DUE 'T 0 scH E DU LE LO A D = 4v'
- av v oI T + a le a t, 180 91 1.12 X = 1 19 kV no -
Miui M o M Bus v o LT A G F_ ouE To se n t outE to A b
= vi -
av'
= (, . 8 4 - I .19 = 5.(o5 kV
- O.Ol3 PU @ 6.cl k V h *D b l T I O N A L. 1))P = 119 -I. - o . o t o PL/ @ 6 3/< v s . cf E
/A bf O 8 *
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Seite t b10 or bc- 28 RHR @ 10 &c). . 5QtJ - E 3 -ols co w vico O d oarc 2//c/ /N: e ce.co o f3 ' o.,, d/ Iv /22 TEST Lo AD IN G vi lik VI s P RE.T R AN s t E. H"i VO LT A G E
=
6 69 KV v 2,12 , kw2 11 PRE T R ANst E NT CU RRE N7
=
108 A Rwl : _ P at Te Aust E NT RW = l 131 cossi - k ut/ r3 vi i i = 09038 ei e 2s.B4 kVAl = 1 2 S l. 4 1 V2 = u g ui g,sy gA y g gy g q q gyg go g. g, $ c g;ggi = 3, $ % KV C I2 = R G. S U t. T A t41 e yC R E NT ( QWH1 tl G 4 51 #- 2 T ' t G'; A 1 V 2 =246A kut = v. u o ninguon vot3 s. c t v2 = [58o cos02 = tw2 / 6 v212 = o. G 6 3 4 92 = 48.4 c u n N c e. to cua nt nT = 4Ir
=
1 2 L92 -I i Le_. 246 48.4 - 10 8 Qs. 3 4 16 3. 31 + j 13 3 96 - 97 6 -}4 6 2 2
/A E : (o 5 7 6 + j ( 37. 7 4 O
C l $ 2 . b 2. c4'b 8
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R UN N) N G 1.o A D =- 1708 kW 4 ,j loS S gvAg
=
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, 1708 + 1 o 8 8 - n a i - j s s 5. 6 j
= Sn +j ss2 4 = 3 9 e. s L4 3.7 5 A It : C H A NGE IM CU R R E, N 7 poq ggyA
= d kV A 6 kV A 45 v2 e vi
=
798 8 - 798 8 _ _g x6.69 m s.s9
= 82.6 - 6,3 94 = 13.56 /43 76 l 4I t 4 a Ic = 65. 7 3 + j 137 7 4 + 9 6 +J'9 38 7 5 51 + j 147 '2
_ = t 6 L j = r es.4162 8
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- AV v OI T + 41c 6ti 11 X /6 s. 4
= = 1 19 '
/ 52. G 2.
mmsou aus votTAcv_ nut To se a t outt 1.0 ,. 3
= vi - av' i
=
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= 0. 7 9 7 PU @ 6,9 g y 1
A DDIT/civ A L- *D IP = I: I O ~ l ' g, ,4 =O*O/5 R" (. 6 i Lia \ C 2
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e .e i,ta, 025 ., o c -- l E> E Rc N / 5 Tec, sr1ea. E3. ois 9, cowvnehearc oM All4/S-eweno. e .n 2 / f 41se ~ TEST Lo Ac tN G VI
-it V1 s PRE 7 R AN S t E. M7 VO LT A G E
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It 2 PRE T R Ansi E NT c u RR E NT
=-
118.4 A RW1 : _. P R E T R ANs t E MT RW = . ) 2.14 I4 W c.o s e i - wwi/ 15 vi 11
=
ei = 30. 2.5 tVAI
= l 4. I 7 O I22 4.0 -j ] 13 , G 6 ..
( V2 : I2 MiHi TAU M V 4),.1 A G E C f.S U LT Atal tVE TO MQ10R STACT = 6 ed b c uC R E N'T ( oukut in G 4 a s a r s uG) AT V 2= 3 @ , 2,,, ni2 - zu A, niumun vou u s t v2 =.t92.o-coco 2 - tw2 / a v212 =
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CHANGE. 1H CUQRENT *- 0 IT
=
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== 19 7 2 5 6 ~J'
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=
2- 1 2. l. 1 i 5 0 . 0) l A kv A : b i r F E.R E N C E tu R uNN\ N G Lot o -
- kVA l stuE.Out.E) kV t.t ( r E ST) jp 4*1.f _ j' f g 4 sIe,c , w . , -i, n.; '
C
~
- s t i 54 dIh E - 5ll.3 9 6 S . 2. 0 / h A It = C H A NGE 'N CURCENT FOR.,okVA _
= dkVA 4kVA _ 4d k I[;
E v2 6 vt - q ,
=
2 4; 04-) 52.55-6 8. 3 9 +]4 2,y4
=
I57 j 9. e l . . 94 9 6 -j uz . s 2_ !
^I T 4 ^ Ic =
/ / d.66 -i 232j :
2./,27p
/4 ii l' $_
S. L__ y
a sact- St5 o, bG-
~.
S a t4 - E.3 -' 016' i
-,.&.,a:2lui171 eweenco . a Al oart 2IhI /hd
.4V -=- T E. S T VOL7 A G E' DROP s
vi: . v2 = t,ig VO LT A G E DROP D U E, 70 SCH E DU LE' LOAO'= 4V
.: a .v v oI T + a le .
a t,
=
137 - ku m ka u u sus voLTAGF_ duE To scuEOUL.E , LO A b
- - Vi -
av' !
=
g.sg
. [ OJ
= PU @ 6.el k V AD D lil0 H P L- b if = / 3 7- /. 2 9 g, ; O. 0 I Q f t) & g, q g y f 6 L i 2 .
.. , s;tiv O t (* or D G - 2. A e 2.o sre_ s a t4 - E l - 0 \ S -
Arw cowviso T24. out .1 - t 4 -W c eeno _ eur '1. - 12I- ? f TEST Lo AD IN G VI 15 Vi s PRET R ANs t E,N7 VOLTAGE 6.66 V 2,12 , kVt?. 11 i PRE T R Asst E NT CU RR E NT 16T kvi t : _ P R E T R A tas t E N T RW = 165G, 4 cosSi = kvat/ fa v t I t = o.870 O n = 2.9.5 kVAl = 19o3,3 r r ^ V2 : M t >J n ta u M V S t.T A % tyE 70 N' 07 0 C STAoT = 5",40 I ?. = E lt u t.7 Atal e uc t E tal ( ontst et G 4 ., p. a T i n c} A7 V 2 : 343 V V12 : k v4 A7 M it4tt.s u ti vou AG E v2 =. g e, g o 0 0 ~. 0 2 k'At / O V 2. I '2 = 0, G,o S 67. = 51. 5 3 CH A NG E l tl CVQ RE NT
- d 1T
=
1 2 L97. - I i L9.i 39 8M3 - it.5 / L98_ (2 ti,7 41E'h'(143.61 " 83'15 $ l I 5a.o9 r 134.3s ,
/ I dOb 5 70*
f I a
l - s tte 62.7 or l' D G - 1 A cc 2.4 n e_ -S&N.Eg- ogg b cc=autro. h .out i-t 4.s er ( e <e io h_out 12- #4- 9/ S C H E d u t s. Lo An g N G Runos HG Lo A b = 2Gi4 kW 4j IST.B.(o kVAR
= 3046.5 1 30.97 A kV A -
birFEnENCE gN RuNNg N G toAt
- kvA ( St u E cu t. E ) -
kV A.t ( T E ST) t 2 G 19 + 176 9 .fe 'j - fife 76.TS f 93'7.1T 75'1.91 + 61).W 3
= 1196.B/33.4 6IC : CHANGE 'N CU R C E. N T FOR 6kVA 2 d kV A okVA F:., V2 % vs
= _
1146.% , it4 6.8 ff r.*o fi G.G r. 112 Gi - 99,4t = 23,19 / 33 4 aI 7 4 a Ie - (6g,o9 , gg4.959 t-(9 % + 12 77h
= 6 7,45 + Zo 7.7t'3
( ! : 215.38/'7 '? l i G
- m.--.
070
.,. ,. swit or DG 1A a 2s J te. '
S Q t4 - E 3 019 __ cowvito ,% occ _1- I4 -W ewesto _ e eut 2-Id ~ P AV = T E. S T Vol. T A G E DROP VI - V 2. = 6.(,(, - 5.Mo s l'. tfe ' VOLT A G E DROP DUE TO SC H E. O U LE 4V Lo A D :
= ay v oI T + 41c .
a l, nS.T 8 s \.h -- = t,py 1% .T Miu1 M u u Bus v o LT A G E. DUE To sc u t outt to A d VI - AV'
~
= 6.f.(e-1.175 : E,t3 2 0 7fefe PU @ 6.9 kV I 3 75- /,2.4 A P D / 7'/ w ' t- 1)!P = g.9 = 0. O / ~1 PU hd yv
/ 4 -
L i a S . e
-v --m -www- 9t
i uv G51*) w YG - E S ' s aw- E3.ois: 1 Cc WP 5 T A 0.T @ ?, o t q c_ l co. meo'G2 d o,.rc_ 2119/8 3 cueesso ^^ em 2Il 5/G p v , .- , TEST Lo An tN G .i VI 11 Vt s PRL7 R AN s i E. H1 VOLT AGE
- 6*S6 U V 2 ,12 , k wg Il 2 PRE T R o t4S t E NT CURRENT
= 207 A kw i : P RE Te Aust E MT
_ RW = 2\37 e oS Bi -= k vit/ n vt i t = 0.8964 Ol s 3\ \ kVAl = 24q),4 V2 : Mt un toutA v g1 A r, ( tyg 7 o pg3og s74c3 : q ,2 k,y I2
- RESU LT AH"i e ut t E N7 ( Cy44titil G 4 L1 A e t t u[j Al '/ 2 263 A kWt t kW A7 tmia g g3 y g g sfogy 4 4 g yg ,, 747g C 05 02 kW2 [ O V212 = 0. 8 012. gg 3 6,73 c a A n c e. in cua n t nx -
4 t, 12 LO1 - Et l$.4
, 2 o,g 1 9.75 - 2 07 1 3' l
\
2.3 0. 3 + 3 l *7 7 3 - III'1 ' *
- e. e /*
, / 4 li ( a m ,.: i E u. 3 i S . l > - 1 t.
smet [0 00 , D0' S &H - Eg . o g g
~
. cowvico S.b.I urg _ 2 / I$ [22
~ emento u,e 2.}Igly*
S c H E b u l E. LO AD IN G
/:
RUNN5NG Lo A b v- 1099.3 kW 4 j '17 9 7 kvAn AkVA : Di r F ER E NC E 10 Q ut4t4\ t4 G ( g r. Q
= kvA kv a g h t spj
( te u t ou t. E ) -. 3 0 3 9. 3 -t 3 17 9 9. *7 - 2137 - i 12.8 3 3 o13 g +j 471.2 = to 2. ; t 2 M_5 a Ic = cuANGE IN cue n E.NT FOR auvA
= o kV A a kv A E v2 A vi v.
t o i?. ? - 1012.0
' b,, 4 73 . 2 O k 't b.9 b
= :!6.2 -
35 7 gg,5 t 27.19 .:. '. 1 + h 4 . S
.g O I 'T + 0 IC $---- ;~*O b7' # ' '
L P. a t '- % $ ~J e R em *
- 9en
=
(
- n -
. o4,21462
o-ti.it t 3 51 or bG- _3g g, n, og co.mio ofed ..rc _ z/ s5 /se
. e u. . % ..., 2 //s /A Av = TEST VO L7 A G E DROP VI - v ?, s . 2. 6 - n .1 . 0.7 4>
VOLT A G E DROP DUE 70 seR E bULE #' LO A D 4V
= av v 4I T + a lc 4 I nAug. sT Aul 41t s o.75 x 34 2
=. o. B S 34 3 M t 'J i h* O M Bus v 0 LT A G E. DUE To s e " E C U L 7. LOI b e
= V) -
AV'
=
6*6-O.3$ : $.\\ k.V O.33) PU @ 6.dlkV 2 c- 7G
~
A')'blTIONAl.- T> I F = g, ;~ 0 0 I 3 P U h S ' S E V ( 6 L i O C ( - N
m er ?El or D G - 2 A g g g o S ET.. S A N - E'3 01:3 csp 4 pp com mtio _ % oarc 1 . t4 .& & - c ceneo v eat 1-14af( TEST Lo AD IN G VI 11 Vi s PRL7 R AN S L E.N1 VOLTAGE 690 'lt .12 , kW2 It = PRE T R ANst E NT CURRENT r-
?T8 kwt : _ e n t T R ANst E NT RW = 2574 c.o s si s k vti/- f3 vi I \ = 0.63T OI 2 33.9 kVAl =. 30 $ $,4
( V2 = I2
- p g ui r3y tA v.3 t3 A q q gyg g o t,.gs g 57Aoq 3,1,7 CE.S ut.T Atal C UC R E. N1 ( Q u ktn t f1 G A .9 8- ii ' tiG') Al 'J 2 s 515 kW2 = kU A7 tait a g e.s u n votT A g E v2 = 3tly C0502 = kW2[ 6 y?,I2 = 0,649 02 s $9,57 CHANGE. tN CUR RE NT
- 4 IT
'= "
1 2 L91 - 1 i 1.S.* s 57.8/49.57 - ITB / 31.4 (341.4t + 4oia)-(vs.39 + i4t. r/s) ,
- IL7.03 + 2 5~9. fir f
- 6 3 189.3 /4395_
l C o . k
s.Ircr 5EE o, D G ~. 2 A ce i go sge. 3,q g , g 3 , g g g coworto af4 _ cart 1144 eweento _ _ oave 3-(4 -Pf' S C H E D O L E. LO AD I N G RuwH t NG t.o A b s 3339,3 kw 4 j 1899.7. xvAg
= 3537.3 { 19.67 A kV A : bttFERENCE IN R uN tat N G t. o A o i
- kvA
(: utoulE) - kvAl(TEc.fj - 5 (33M.3 + 1899 th -(2F74.2 + %97.3r9 s 76o.1 + 2o1.8 F j = 7 g4,44 /14.3 7 a Ic = c H A McE tu c.ue n E. N T FOR o k V A.
= okVA o kv A U., v2 6 vi 3 78644 ,
'18 4.4't ff r.15 G 6 90
=
Sf. 49 - 6 F.80 s 2.o.69 /14.87 aI t + a Ie : (117.o1- 259.88 0 + (20 + F.li O i42.3+as.in f y 303.tt/61 (~ a$ R o
1 e t r __. 6 3 + or b G - 2. A e t en set 5 0 t4 - E 3 - O t 5 ce=*utro M oarc 1- 8 4 -t r excesco _ eaer 2 84* ? 4V = ' TEST voL7 AG E DROP VI - V 7. = 6 9 - f tS*
- l.6 s VOLT A G E. DROP DUE To SCH E D U LE LO A D = 0V'
- ay v OI T +61c a lg 301.11 t t.65 -
),71 IIS. lfe M t m t> O M Bus V O LT A G C- DUE To
' scutOULE 1.0 A b s
( =
=
vi - ov' ( S - 1.73 s I.t7 0.799 PU @ 6.9 k V b 1P = 1 7 )~ - 1 4 ~c A T) 3/71GN A L. g =O 0l2 PU 0 6.clh x ( ? C$ O k h ---muun muses- i
~
tva esos tem ots 2 isi - l TENNESSEE VALLEY' AUTHCRITY
- susar - C 1- ~w c 25 sus;scT_ 0 G \/o LT A G E ANO M AQGlM - A4ALNS\S ,,o;ger_,s a N 5 & N . E."$ - o tej i- 'computso e, are
_l oars 2/#sjaa casenso er g oars 2./lg /g g _ A P P E. N D i x - C - J DROP DUE To RANDOM Load t a e
Tva4essten ocsars TENNESSEE VALLEY AUTHORITY sweet C 2. or C 2 c sueJa;T DG VOLTAGE AND MARG 1M AN A Lysl5 p n;gey SQd SQN- E 3-olt5 - c'rM ous courutso ev 2/22Is a cwicuso er p mum qug PURPOSE : TO DETERMlUE THE EFFECT ou THE GA av AUo 4sov sHuTooA/u BCARD 7F/M918UT YOLTAGE De DUE TO TH6 CTAmuG CF 1HE LARGE6T
#AUDOM LcAD owCK CcMCURREUT WITH THE 660uGUCE l CAP JTEP Wlyi D6 RCMAluluG 0)UI%N1 FROCE58 LOADS RuMUIMG.
PROC & DURE E8FERBMCE S.I PCFluf6 6NTseu EAUDOM LOADS ~ HAT OTART SY IMDsPeuDeuT pgocese crouALs quat cculo se sTAgreo Auvwnene IM THE LOADIUG SEGUGWCE . W6 HAVE ACSUMeD THAT THE slMULTAU60uS OTART CF ALL SlyTEEU RAuroM FaccEs5 LOAD 16 UOT CAEP18LE, RtNEVER, ( TH6 LARG667 LCAD BLOCK COULD CAEDIOLY OTART CC3JCURA6MTLY Wny A QEQuBUCED LCAO CTEP. FCR THl+ AUatw6.Tr:5 TOTAL RouMluG RAUD0M poCEe$ LOADS 16 1% KVA WITH -HE LARGEST LOAD PbLOCK CC%l0TruG cF A GD HP A/c ccMpRE660R wtTH ITO ASfoclATEp ts HP AM PAUouuG UMIT. THE RUUUluG RAUDOM FACCEG6 #D+ l+ APPfD TO THE OCHEDULE FUMMIMG TO CGTAlu 1HE MODIFIED 6CHEDULE RuuulyG 1 CAD- THE ADDITICUAL. VOLTAGE dip Dus To THis MC91F' LED fcHEcutE RuuutuG LOAP lh CALCULATED e4999 CU TM6 FHoC6 DURE PE9 cal 85D IM AfyEUDix 6. 1H6 48')V GHufpONU SDARP VOLTAGE Dif Wlu. ALfo C5 IUCREA950 OY THE SAME p6ACEUTAGE A6 THE lo.4 KV DuS VCLTASE PUE TO THE RUUUIUG RAUDOM fCCE9) LCA9. 7H6 VOLTAG6 PROP CU G,4 KV 809 DUE TO 480V RAUPOM 6fAFTIMG LOAD ( 89 @) i9 TAxeu A9 WUSAALY FReptTroJAL ro THe VOLTA 6e 92or ou s.o av sono pus so crAsf c,= FIRE pume (2co ne) Atcue. k ( 3.91 < *
=
- i. a % Aegeuorv A s. a, )
TVM89H (EN DES 2 78) TENNES2EE VALLEY AUTHORITY . CMatt C 3 orc 25 sueJs37 DG VO LT'AG G AND MARGIM AN ALYSIS excatcT sod SGN-E3-ol5 comevito av cAtV oAva 2l22l88 cwecuso or y oats 2[23g THG %LTI)GG OCCl? CU A&OV JHilTCONN XARD DUE TO J@V F(titlDCM dTARTIUG LosO (65 HP) 19 inYEU AS UUURL1 PPCf02T100Al- To THE CTAGE DROP CU 4&bV SIUIDONM 2.ARD Xt TO START OF T-iF5 pump (200 HP) hlCME. 00 ( 5. I < 2co
=
C. l 7 *h lPfeMDM A S H, All 256ulTb Th6L66 Cl AUD C'l puMMARt26 THG (,.9 6V AUD 4GO V tRuTpcNU tcA@ yoLTAGE9 cz#m76D fct IM KvA cf BuuMING 86Ul%A1 pxocess WAD AUD 66 HP Cf 1(AttT(UG LCAO CCUCOARBUT wsTF1 BACH LcAO S~~dP o ZT filOULP DG M075D TdAT 9116 GCULD CULY OCCUA ou OUE zap STEP 7c8 ( EACH 7Epeu. THE WORST CM6 G.9 rw AuD 480V #r/976M V0LT469 7~2AUelsuT WFF5WouplVG 70 THl9 CcuplTIou 19 I,4 yscEMT mp 2.4 Fec5uT 66996CTIVBl>f. SEG 7~h5L ES C L AND C A . 1 k l L . t
- p. m m j :e 2 1ABLE - Cl m .
[
. -. 1 VI o RS I CASE 6.cl kV BUS V O l.T A G E : o 9 CORRECTED FOR SCHE bO LE LO AD 4 R AMbou 9uuN!'!G LOAD 0 h
i FAHboM STA RT LOAD < $ f*Rt O R TO ST ART A bblitoukt b'b0 k START S E G. . PRE T RAtl SOURCE DG Lo An D6 LO Ab PU DtP PU DIP TOT AL PU MstHHp b P O M OT O R. TIME vot1 AGE DG ritto TEs1 scuEbutE ritt o ouE To Pu Die Bus vtLTM.E (" SEC. PU BET 3.13 TEST LO A D 8 H' '" C # " Osp tx3E To (@-@] o y D D % 'b G @ _j E!{ "" 4;'R P^*h 6%
- a a
5 2 CCP 2 1. O O ct 2A 17361545 12061 42_ o.17 4 0.0 0.174 0 O.839 $. p j s a en st 9 o. ot 91 2B 1102 121.8 g737 [34.7 O.8OO N 5 N 0.162 O. 01 2 0.19 i cc 8't
- y. <
n Z h R it R 10 0.969 2B 1251 12'i3 20251325 O. 159 0.014 0.19 0 0.779 ) E
- ' 2[ <
E Rcw 19 1.001 IB 1417 Qo;3 2382 Q0!! O.187 0. 013 o.217 O.784 I I O AFW 20 0.9 6 c/ 2A 1903129-5 3049(31 2 0.IB3 0.018 0.218 0.747 ., i
= <
?.
CcwP ~30 1.008 2B 24951311 352013005 O . 110 0.014 0.14I O.867 @ . CSP 4FP 18 0 1. 0 2A 3083(133 3837129.7 0.200 0.014 0.231 e o 0.769 E p p
~
t & ? O - 5 A 200HP FP WAS S T A R T E. b h O W IT it CSP. Q . S A AD3usTED T H E. FIELD TEST OtP To DE LE TE T HE EFFEET.of 200h? F.P ( D t P : 6.039 Po) 0 g uoTE1: DRoe # AD D\T t o N Al-ouE To START OF 85 MP RAubbM toAo is 0. 017 PU . n N (9 no coopEciion ou_c ro , eanoeu toto s r59T is omE S i'a c,E, M 5T Lo** $5 530 Ava m*E . Oi
'tvp;msits onsa.m . '
c :nn2: :':: ':At.L;' Au;; c t;:': C u:t . CS crc 26
' CUOJECT- D G VOLTAGE. AND M'A9.61N A N A LN S1S 4:c;;c- S44 s $ &M - E% - O\*)
ComPVitoav gh m 2llg/gg rpgugg oy
;;.\f r. "L, gg l T A % \. E - C 2.-
\40 R ST . C AS E - 4 8 0 V S'I D N . % D ' . V O LT A G E. .
CoR R EC T E D F 0 9. SCl4 E DU L E t.0 AD 4 RAMbOM 74MNtuG - LO AD .4 RANuoM START L o t- b . iPRETRAN Pu D)P A dn tit ou AL 'PU DIP PU MIN. S EG. TIME V6LT AG E FIELb PU bt? bOE DUE To TOT AL Sus VOLTAGE sEc OdEasucEo) T tsT To toA0iac sTant or .eu ote O @ 90 g gfFEf1EHCG RjD'"o g y@+O+$) g(o - (t>] ( 2 0 1. o 6 10 c.163 0.163 0
- t. 0 6
- 0. 637 9 1 017 0. %7 0.012 0.022 0.2Cl 0 816 to 0.994 0,14 B o. 014 0.027 O.1B4 0.'B \ 0 19 1 017 0. I B 3 0. 013 0.022 0.218 0.799 20 0.979 0.179 0.018 0.022 0.219 0.796 30 1 033 o.t6B O. O t 4 0.022
+ O.7.24 O.B09 t B 0 (csp 4FP) 1. 0 12 o. 13
- 0, o i4 0.022 o.266 0.74 6
+ 200 MP FP WAS STAQiED W\T R CSP A AD 3 0 S t E.b TuE t i G. L b 7 E 57 dip TO CoMPEN SATE THE E.TFECT OF Zoo H P F.P
( 0. O 5 i P U)
@ No c o q R Ec.T t o n tu t.
To 2 A44% o M LOAh siART is o c ta t.. S t ea e E TF. 5 "1 LoAB tS S ~0 ") '<. V i- M09 E . HOT 7. c o t.u u n g Q tweu @ i, E E T A%l.E - A2
. tw;un g one is SUE To Lt ut butE b LoAu + Emo0M SuwuNG LOAb.
.TvA cash ten ces 2 tal "*ENNEOCEE VALLEY AUTHORITY . fM8t? C lo or C 26:
sueJact .*moJacT MN 3 G N - E 3 - O l */ OW comeuvio ev oat: 2./22/Cd caccuso av pp ca's 2g2 j gg- ' 7 ABLE -C3 , l G.9 kV Bus vOL7 A6E D R.0 P DOE TO RANDOM Q UMNtN G + RANDOM ST A RT t. 0 A D SEQ TiktE- TC D'" "'I* ***"' D ""* D1" D"' T' teetoutt (DAO + sc H s 00 L.L t.oAn RAuggu RyuHtuo stc CA=oon avu oiws + + g,,gon s3,,,
" * * ** 5 ' 6
- T '6 ' S
@ (?&4LE Cl3 @ (TAgtE st 3 @ d) te a. o (g_g3 2 o . 17 4 o.t74 0 9- o.191 0 172 o. ot9 10 o. 19 0 o. t72 o.ota 19 0 217 o . 19 'l o, o t 8 20 0, 218 o. 200 o . o,t B 3d o. I 4 t o. 12 3 c.018 180 o. 23 t o . til o. 019 T A B L E. -C4 4 80V 57 D N BD. VOLTAGE BROP but 10 QANtou 0. U N N I N c 4 RA N boM ST A R T LoAb Tot At, ut e out to TOTAt bt p DUE 10 gg 7,4 DIP but To scatoot.E Lo A0 + seuswts Loko EAntits RuHutus SEC D ** tD4 R 9 H t4 t NG * + RS agan sugt
^
g "".",Tts" "c,*'g )'"h @ ft"* {Q -Ol 1 3.163 o. 16 3 0 ; 5 0. t o t o\77 o.024 to o . 18 4 o. 161 0.023 (5 0. 218 o. 19 5 0.023 2o a. 2:9 o .19 G o, o23 30 0,22 4 o.20% o.023 { too o.246 o.242 o.024 *
~ ' - - ' " '
_ _ . _ _ -u. C7 ,- C 2 5 S&H.-t3 0\$
. . . . . ._ ._ : :vrato aM w h c.t _:2/t22/11]Qc /
non l a. - C ALCUL ATION R AM DOM LO A D RUMMIMG , ( RE.F. 3.l] TOTAL R A M O 3 W -t.o N b su uninG : 19 4 3 + 3 ci q . ? 41 sv bd 7,u Ale censu tu n uto c' = 4 4 . 2 7 + 3 " M \ \--
'4 80V BC 'R y A A MU 254 104 tt 'N G :
- 21. I fo 4614 22.
!~ RANb M Lt Ab R tjN N I)4 G - 2 (p b s _ ST AR7 t H G
, :. (2 3. 5 7 + 3 51 8 7
=. 134.3 L 0 7 7 2- kVA l
a ( i i e i I h I 7
,l l b 2'
..a 2 e' L- ._
~ '
. . $ater _ C8 , C25 D G - 2 E.
St P u t.19 c ui e's sEc. SQM -E s -o n.~ t *4c.t.u b i t t e, s t. t.) D s t.t RU A1HIN G L o A'D cownrio_ Mal urg 2/14 /22 cm.teno _h uss Q.} ldlM TEST Lo A D IN G VI lt V1-s kwl PRE 7RANsiEN7 Vo l.'t A G E
= 6. B4 kV V2,12 , kw2 li s PRE T R ANst E NT cu RR E NT
- . 13 A RW1 : , P R E T R Aus t E. uT RW = 1021
- c. o S O n =
k vit/.- fa v t 1 ) = o . *. 2 B ') On s 21 B' kvAl - itot 3 e - V2 = piut tou tA V S t.T A '. E 'buE T O MOOR STACT 3 *'I 2 I' V It s RC sVt T Ann e UC R E N1 ( QWtti t4 G 6
- 7 A 3 7 ' tt[) A1 V 2 = 240 A KW2 = kw A7 tait 4 g i.s y t.s vot.T t G E v2 m. 1365 C0102
- kW2 [ f5 V2.12 = 0 3741 St =%*
CHANGE. t ti CuG R E t4T = 4 I g-
=
12 L92 - I i LO i e n t r. ",
- 92t:t C
- 'i.'. 4 *, e *, t ' 6. 6 - S 5.3 - 3 'O 4 #2 7,1. 3 'a A1* t % 7. . \
5
/ A #'
1 *7 ] } - . a 2 (
- 4=
s;ce, C9 y C 7.5 nG - 2B - SQ O- E 3 -o l g
.. co.mco/2ko.re 2he/ok-c ue no h en , 1f!s ')R7 sc HE du L E Lo Ab t N G RuwsiwG Lo At w. [4l0 4 gw 4 j 978 7 gygg RANDOM RUNNING LQAO : \'2,"h , 9 _k W 4 ) $ g,g gy 4 g TOTAL Ruwwinc to A D =.153 4 3 + j 1030. (3 A kV A = b)FFERENCE IN RONN\NG LOAb
- kVA ( segE Du( E } .
g,y gg (7 gg7} s 15 3 4. 3 + j lo s o. 6 - l o 2 3 -j 4 o 9. 2. {i s s ;* <1 :.- r sl 6 2. I . 4
= 804 3 -
50 55 A I c. = C 64 A N G E in CURRENT FOR okVA a d kV A a kv A 45 v2 a vi 804 7 _ ~ 804..7 - W x 5. n qT x 4. 3 '
= 13 3 3 56
= 812-67 9 ..
110 2 7 oli + 4 Ic = b l.3 6 t J J 6 c. ; + 3 4 3 e }, - 5 9 81 + j 17 2. - ,/ (- :, [ 0
. S 2. 4 5 L~io 8 6
s<t, . C 10 ,, C25
.5QN -e 3-o ig
- c=>vico A 941..r 2/ie /s~8 cueno b - es,, 1he, / ep u-1 av = T e,37 ve t,.1 g c g - DROP vi -
V 2. = 6. 8 el - 5. 7 2. = 1 12 kV vo LT A G E DROP Dug To Segggg(g ,
- av y o ty + 61e 411 162 4.C -
= 1.202
= 1.12 x 17 0 Minimum Bus vo LT A 6 E. ouE To se n t out.E t.o A n
= vs - sy' f( . '
= f o . S o - 1. 2 o 2 = 5.GS3KV
= 0.8171 PU @ 6.9 kV Ab b t Ti o M A L ttP =. l. 2 0 2. - l 1 2 (o . 9 c . O I 2. PU @ (o.9 k\/
*n
'j 1
2
- e
- Mb C lt or C25 DG "" '*
SQN- E1. o l g
'RMQ 0 7 AC T G t o N C.
-1M etutin n 2Autsu ._t t,n R u u N s w G : ,,,,, _ afd ,uc 2/t4 / g[
cueno_ v& _see '1l141Rf i TEST Lo AD IN G - VI
.14 Vi s PR(7RANstENT VOLTAGE
- 5 6 Cl kV V2 12, M 11 's PRE T R ANst E NT CU RR E NT
- . 80B A kWt : .P RE TR ANSIE NT RW m '.115 cos Si = ' k vai/.. J3 v i i g = 0.9035 Ot s 2 5. M' kVAl = 12 51.4 4 ~
Y2 M % Hi IA U td V 01.1 A G E tyE 70 = f.' 07 0 4 STAQT 5. h 9 R V
- m. - se m .,m .ms
_ my m ,,,,,- s,,m,,,o m ,2 ku2 = xu x, nin n.s u n v ou ,. c t v2 =. 15 ao
~
C0102
- kW7- [ f3 V 7. I '2 2 0. G G3 4 S2 s 4 B.4 CHANGE. t ti cy9 RE NT = 4 I,7 12L31 - 1 i l9.5 s 24 3 444 tosin.14
- I 6 3 . 1 1 - h t 1 1 . 7 ,5 ' " . 6 - h 4 ?..'2. 1
;0
- ., 65."1 4 'I ti" 7 4 c e:.
L ',? "% b R S - (
- 3,lt s, C l 7. e,__C25 :
DG-S A N - E 3 - 0185 co=*vtso N *3 oat: _ t)Ig /gg \ ewesto b _eut *2./19/p/i ScMEbutL Lo Au t N G FUNNtNG LO A b s 1708 kW 4j togg kvAR i RANDOM RUNNtNG (oAQ = \ q3 , 9 Kw 4 j cy g,q gy g g T O T A t- Ru u w in c t.o A n =. t a 3 g ,9 + 1139 9
~
A kV A b t F F E R E N C E. IN RONNtNG LOAb
=
kvA ( se n t ou t. E ) - kv A47 gs,7) .. f 7 s 183n. 9 + b tts9 9 - ins i - 3 5 35. G s 7 0 0. 8) + 5 6 o 4.1 = 915 4 14077 : i a Ic = CHANGE 19 cun n e. w T son 6kvA
= o kV A akvA C3 V2 6 vt
, 915.4 _
%54 (3 y 5 59 G v 6 . 'o 9 9 '/ . fo - 79.9 ..
t
- . IS 7 1 40.77 r- 11. el + b 10. 3 417 .+ 4Ie = Gep .7 3 + h 1"t7.7 4 + 11.9 + j 10. "h !
(( e c e E 77.63 + j t 4 g,04 t 6 7. 7. i U 3 :
. . 1
-bG-s '<t r CI3- o, C25 s q u - E 3 '. 015
[ cowutio Ma l ou z/is/tt ( eeu.ge...,2/rp/;p av = T E.s T vot7 4 c q .egop VI - V 2. = 6.69-5 99 : 11 i' V vo LT A G E DROP out To se g E DU LE # t.0 A D
- AV av v oI T + 41c a l.3 2 t.1 X 167.2
- 1 7.0 k V 152 62 MINIMUM Bus V O LT A G E. DUE To sentoutE t.0 A b
= VI - ay
- 6. 6 tl . 12 -
5.49 l<V 0.796 PU @ 6.9 kV ' t.2 0 1.1 A bbtit 0 N AL tte s =, g , o g 4 p ,j G 6.%V 69
.T 2
s E. e
.s 9 .
ime, LC 14 ,, > C 2 5 - DG- IE ERew c Api SQN - E1. Ol 5 e 19 cec inno niu 4 0 t H u ota t.%d R u N w tu G c ,,, ofd ,,, _ 2/19 l2 2 emeno N u,, 211Ll l C! v - , - T E. S T L o A D l ea G -' VI-14 Vi s PRE 7 R AN 5 t E ta T VO L7 A G E
- 6, tkV yg 12,ggg It
- PRE T R A t4s t E NT C U RR E N'T
= 116 4 A RW1 _ P RE T R ANst E NT RW s 1224 CO S Si
- kvit/- f3 VI 1) = 06M7 0I s 30.25 kVAl- =. 14 17 V2 m
(- 12 = u g gi tay m vgggqq gyg T o pg3 0 p 57Ag3 3,62 R E S UL.T A147 c yc E E t47 ( Ctmu t r4 G 4 L1 A Q T t uG) Al V 2 s 3 4 C) ,Q KMT
- k V4 A7 M t u t t.s u l i vou AG E vq z. (%O i
Cos02 = kW2 / C3 v212 = 0.5G48 01 . 33 6% t C H f* N G E. tH CuQ RE ttT
- 4 IT
=
12 L91 -I i l.0_t
, 3 4 n . 2 ; 9 ,. :, t - t t a . a 'O O '-S s gqq,7 -
- 2 A 3 . 0 - 13 0 3 - b 6 'l ' b 7
~
- ' 4.7 4 j "2 2 5 ;
f Y ( sj a 247 , ' 6~ 4 5 8 . (
- v.
G-
$.16, _ C IS , c2s DG- -
s aw . E3. ot s ( cowstro e we=eo afal on: ene 2hsI6s 2 /t 9 /P; s c H E b u t t. Lo Ab t N G ' Ruwns uG Lo A b s 20429kw 4j gqq9 '4 xvAg RAHooM RUNNING LOAQ = \ 2"$ , 9 kW + ) 3 t,q gy A gt, T O T A t. Ruun tN G t.o A b = 2tG6.4 +h 1777 D A kV A : b t r F E R E N C E, tN RUNNt NG t. o A d kVA ( SCHEcu(E) _ gy Ag (7 g g,7} s 2166 4 43.17.77,3 - 1224 -3713.6 942 4 + 3 9 63 9 = 10 9 B L3_.0:3 AIc = CHANGE in cuRR E.NT FOR AkVA a okVA A kV A 45 V2. 4s vi toq a 1099
= - -
-G y 5 41 6 v 6.9 %
lit . S - 91 7 ,, a 21.i 1 30.9 : n a. i + 3 t o , a olv + 4Ic = 9 4 #1 + i 2 2 B + IB t 4 5 to.6 [:. . 113.0 4 i 239.4 (. f-
=
3 264.*7 ) b 4 *I b.
^ '
i-nt __.C l $ o, C2O
'bG- san- E 3- oig ,
co vtsel'M I r 2.ltel83 f e u.co 4 d ,, 2 0 p # r av = TEST VOL7 AG E DROP
=
VI - V 2, = -6. 9 % '/ 6 1
- I'2 9 #
Vo t.T A G E. DROP DUE 7o seg E DU LE 1.0 A D
- 4V'
- ay v oI T + 41c a17 I s t. 2 9 y 2' 4'l : 1. 3 B kV 2 4 ~7 #7 MIMI M U M BUS V O LT A 6 E. DUE To se nt out E )0Ab s -
, = VI - av r
, g, ,9 g . t.3 S :. 593%V ;
- o.80i PU @ 6.9 kV OtP -
I' b' - 3.0\3 PU S 6.9 W i 1 A gg gTio n AL 6.9 t f p i t ., I i l [ . 5 4 : e 2 l b !, E E * ; t
< T
. f
_ _ _ _ - _ _ _ _ _ . --I
.8y. s4cr C17 or C16 DG -2A Arw :TApT tt " 2 0 s E t _ S Q tJ - GE 3 - o f 5 tiietu m u ;- Q A et to y quNNIMG loa 3 comeurco GMone 2/14l22 ewento _b our } /l4 lC- 9 !
u TEST Lo A D IN G . I VI 11 VI = P RE T R A N S I E. N'T VO LT A G E
- 6. d 6 *A V V2,12 ,kW2 It =
PRE T R ANsl E NT CURRENT
- . 16Cj A RWI : _ P RE Te ANst E NT RW =- l6>G c.o S O g = k vti/- (i v t I g = 0.37 gi : 2 cl.:A -
kVAl- =. t c\ o3. 4 V2 :: M t u t ta u t4 V 0 LT A G E DUE TO 100709 STAST : */.4 d [2 : R E S V LT Att'l C UC C E NT ( Qukut NG 4 t.1 7- Q T i t1G) Al VO34$ : A KM2 = k V4 A "T Mita t t.$ u M Vot T AG E v2 = \ C* S O cos02 = kW2 / fi v7.12 = 0. 6 0 B' 92 2 52.cf 3 CHANGE IN CV9 RENT = dI.T
=
1 2L92 - Ii Le_i
= l a g (~, ;.5 3 16 9 12' 54 a
+.
2 t l . -~ - 3 2 7 6 " - ! d " ' ~ ' ' " .$' g - o 3.1 4 3 ' #' ' S I 4 - s
.n.c i--
( g 3 .
, 9Ettf b!b or_ C25 i
o G - 2. /4 2o6Ec A- P W SQM *'E 3 -015 comuno onst 2llb$t l eweento Aboan '2.flNfr $ l S c M E D u t. E. LO AD IN G ' RUNN)NG LoAb s 2.( ,* l 4 kW 4,315 6 8, G kVAR RANDOM R ON NIN G LOAO = \2'S.9 kW +3 5t.9 KV A ft. TOTAt ROMN tN G Lo Ab :. 2731 9 tj l 6 20 . $ o kV A = b\rFERENCE )N RUNN\ NG LOAD
= kvA ( scHEDUL E) -
kV Al(T EST) *
' 37*9 Y,[ 16 2.0 5 - 16 S G - j 9 38 3
- l D 8). 0 b 6 E 2
- Q, : \ '2- ] Q . O l O 2
- 2 3 a Ic = CHANGE IN CURRENT FOR okVA
= o kV A okVA 45 v2 6 vi
, !279 _ 12 19 '
V5 x5 A afi y g . t> (,
= \ ? G.7 - I I o . 9 -= 2 s S132.23
c 21. 2 f j l g . g alt + oIc = G E . I F j i c3 4 8 t 21. g + j l3 6 [:i = 69 9 tj 202 6 n s
= 2.2 ,.I I Sc.7 5
.h.
4 8
,s. .
s,.it r - ' C l 9 o, c25
!d[ DG-2A ~
f t, a A F to @ 20 sees SQ 4 - e 3 -_ or g CouPuito - parg _ 1!/8((h carento out 2 l' / E f Pfr- '
-dV .= T E.S T Vot T AG E DROP
=
vt -. v 7_ .= G. 6 6 - s. 4 = l. 2 6 kV VO LT A G E DROP DUE 70 ScHEculE LO A D - aV'
= av v aI T + a le A13 0 7* j
= l. '2 (o V _ -- = g . s s s '< v
- c t, . 4 MIMI M O M BUS V O LT A G E. DUE To SC R E DULE LO A b
( = vi - av'
=
G. 6 6 - f. 5 8 6 = 5 2 '14 K1
= eu
- 0. ~7 6 4 e e.9 xv A3D 1710MA L D iP = l 3 S G 'I'Eb 69
- o. ole Po 8 /o 9KV E .
b l . _- .. i
seu, c '2 6 ,, C25
- o c, - 2 8 -
c c va e siACT a E o : :. . . 6QtJ-E E - 015
' l N C L tJ B i ti i R A H C. ,) t .$ L O F D R U Ml N G- courvus N *3 out 2/l*> l 3 2 e unodim. _2//s/pp s
TEST Lo A D IN G yt it Vi s KWI PRET RANSIEN7 ' VOLT AGE
= 6. 9 6 kV V'1 ,I 2 ,k M 2 It :
PRE T R Ansi E NT cur 9ENT
= '20 7 A RVi l : _, P R E T R ANS t E MT RW = 2(37 coS9t =
k v4 t /.. f3 Vi I t = 0. 3 5 6 4' On - 3\ 09 k\ Al = 2495 4
, ~~
V2 : .Miultou M V ot.T A G E BUE TO t> t104 STA9T = 6.2 kV T2 : R G.S U L T AD1 C U R R E. N T ( 9 V t4 H l H G 4 " 1 1-2bb . 1 T t H G') Al V kV12 = k va AT Min g p u n v og_T A G E v2 = 2476 C0502
- kWE [ C5 V7 12 : O. 8 O l2. 61 2
36.75 CHANGC. (H CUQRENT = d I,7
=
1 2 LS 2 - I i Lb 2 s 3 t 21.T9 ._ p, \ 1\.03
=. 233 3 4 3 tq q .s - 17 7.1 - 3 10 6 9
{ @ z 939 4:* ;c.a n 2 { & 3 4.9 ' M.7 A o . R
s ict. C2l or C25 oG- 23 SQ M -E 3 - C IG cowuno 462 onc ? /le /88 c"ecuto - 'cae 2 lle 19 7 s c H E b u t E. Lo Ac t N G R uNN t NG Lo A b = 3055 8 kw 4 j 1759 7 ic.v A g R AN00 M RUNNtHG LO AD : 113 . 9 kW 4 ) 51 9 KV A (t. TOTAL Ru uNIN G LoAb =. 317 9 7 Y j IbI!*b OkVA = b) F F ERE NCE IN RUNN)NG (OAO kvA ( scHEcut E) kV Al(T EST)
. 3, 3 9 7 _i. J i a l i . 6 - 213 6 9 5-[l2 B8 5 8 1042. 7 5 + J 5 2 3. 0 2 : U G G. 5 @ M A Ic : CHANGE IN CURRENT FOR okVA
= o kV A 6kVA 45 v2 (3 vi
=
1166 5 - u 66 5
\fi x 6 2 MX6 96
= f o e . 6 - 9 6. o- = n a L23 6 4 ,,
= IO . G -+ j 6 3 L
1 3 c, c . 4 + 10 3 + j 6. 3 l -
-- ~
=3^- #
41: + aIc r { 6 A + .l 7 0 ' l 5 - g -2, 4 47 35 g E. L.
5'"cce C22 ,, -C25 bG - 2.8 5GN-E 3 -Ol6 covevito_SkotIoart ~2.// B /S S (- cameo pne.,c t i lic /pp . a v- - = ~ T E.S T VOL T AG E DROP t
=
vi -. vz = 6.96 - 6 2 = 0 . ~7 6 k V Vo LT A G E DROP DUE 70 SCHEbOLE # Lo A D - 4V
- ay y oI T + a le a t,
~
- 0. 7 6 Xc4D Y. ==c.E58
=
Mtul M U M Bus 9 0 LT A G E. DUE To scnE oOLE LO Ab
= vi -
av' 6 9 6 - c. 6s3 = 6. f o 2 kV
= Pu 0 8843 @ co .9 k V Ab bm on AL D iP = o. B = 3 - c. %
G - (1
- o. 0 1 4. Pu e G.qkV 4
2 E s 2 -
z
- j. s;.ter C 2 3 '
] ~ -
o, 'C25 bG - 2 A CSP *- F. P sad- E3. o n s START e igo sEc t N e t. U b 1 N G RAMbbM ' t.o A0 R ON N \td 6 ,,,,,,, Ap.) oarc ' 2 l1 g l8 8 o
-( e eena L om KllPlEt' TEST Lo AD IN G - -
Vi ~ ll V i .= PRL7 R AN s t E.NT VOLT AG E t' o . 9 0 kV V 2,12 , kW2 11 - PRE ' T R A NSI E NT ' CU RREN7 2 5 8 'A RWI : , P. R E T R A N S t E N T RW = 2974 c.o s O g s k vn/.. f3 vi i 1 = o.B39 '01.= 33.4 k V A l. = 3083 4 ( V2 : - u t u t ta u to V o t.7 A G E 12 s R E s u tT A tri DUE T o Mol0R CT AC T = 5.25 kV eyeutwi(pyyntrac4 ,., p. a v i u s'j Al V 2 : S ?_ B A KVL2 = kw At Ming,sup .vo g,7 A q E vg = _3 (l 4 i c0s02 = kwt / C3 v212 = 0.649 92 = 49.'S7 C H A N G E. i ti CV9 RE NT *
'O 1T
=
12 L0 t - I i LO_'
= S2814947 2 9 B 133 4
= 342. 4 2 ' 4 01 9 2\ ## ' $ ' \4 '
3 [ " 11T.D 3 4 ) h
- L .i o
-o .
2 39 2 G M*?
< ~
k
sAtr 024 or C25 I OG 2A sa u - E.3 - 015 ( cowurto Efal oarc _2 / f 8f 87 c>.ee to / m enn 11I e l F 7 - w S C H E D U L E. LO AD I N G RUNN)NG LO A D s 3334,3 kW 4,$ 1899.2. kVAR R ANDO M RUNNING LOAO -
\ q3 , 9 kW 4 ) 5 g,q gy g p,,
T OT Al- RU N N IN G Lo A b = 3498.2451951 1 a' 4kVA D i F F E.R E N C E IN RUNNtNG LOAD
= kvA ( sc uEcu t E) -
ky Ag (7 gg7} s 3 4 5 8 2 + 5.19 51.1 - 2974 - 5 1697 4 8 8 4.2 + i 253 7 = 919 9 LL_. A IC : CHANGE IN CURRENT FOR okVA-
= o kV A 6kVA C3 V2 6 vi 919.9 -
919 9_ E x 6.9 _O x 9. ?. S l
= t o t. 2 - 76 97 ,,
=. 24, 23 l_16 . 2 3.3 + b 6 7 T h ( """ a ' -
- f 15 0.33 + 3 2 c 6 5 8 L ;?
5 C 306.0160.6 l l e *
= ,m.- - - - . , . , , _ , ., _ _ - -- , ,
s,;tt, .C 25 o, _ C25 DG-2A S Q t4 - E. 6 - 015 m ccueurco Od carr _2/ Ig /89 carento b OATE _ 2- [ O f h h av = T E.s T VoL7 A G E DROP VI'- V2 = 6 9 - 5 25 = t.63 kv Vo LT A G E DROP ouE TO SC H E DU LE 4y# LO A D = av v oI T + a le o ly 306
=
t . 6 $ 10/ y :. 1 7 S kV 289bb MINI M U M BUS V O LT A G E. DUE To scagoVLE LO Ab
= VI -
av'
= 6 . ci - 17S :- 5 19 %V 0 .~7 4 6 PU (2 6.9 kV AbOtT10taAL b) P = I'l 9 ' : o. 014 Pu G 6.9 kV 69 O
t N E E 2
- g
TVA Qa9H (EN DES-3 78)~ TENNESSEE VALLEY AUTHORITY - sweet D) n.
'. suoJacy DG VOLT AG E AND M AQGtN A N A t '( S t s enoJacT 5&M S& M - E'6 O le;
. { " \_ ~ courutto er G% - onts 2/17/8g cuecuso av . oAta g h
AP P EN Dl X - D 2 LOAD SE&UENCE TI M E INTERVAL , e .. < E-+ _JATIOh!. 1 i l l t l( \ , I
.. . . . $]
TVA 489H (EN DES.2 78) TENNESSEE VALLEY AUTHORITY or Cheer D1 CurJEc7 Ob YOLT AGE. AOD M Aa.610 AuAtysts pno;scr $M SQO ES-ois coueurso sv arca nava 2/2 zl8 8 casexeo av oat zg PUR9066 ' 10 CALCULATE, THE ACC6L6CATl0U TIM &S OF 7HE 6,6 kV Mv702S hT 100 h 0F 2AT60 VOL:fAGE FOR nIS GUTIPS ACCGLeRA7 tug -nME AUD FCA THE MIDIMUM CALCULATED M07DR. TEAMlUAL VOLfACS FCE. QU6 6&WUD WITH chCOJ6R1 TO 100 *lo AVE;2AG6 RAT 60 \Ct.TAGE FDR. Td6 R6MAluluG ACCBL6FATIDU TIM 6. PAOCGDUR8 _ THB CABL6 PRO 96 TO TH6 (p.6 KV MOTORS AR6 CALCULA76D lu AppeUDIY F. ( U6fMG V6MDOR $UppLIED MOTOR AMD LOAD 6Pe60 TDRGue CURVES,
$6 OP&BD- TOR (RUB CURV6 AT MlulMUM MOTCA TERM /UAL. WLTAGE WAS 96V6 LOPED UblUG T@ %a: Vp,3 < T'@ 100 % V . THE ACCELE.
RATIOU flM6 lb CfLCULATED BASED C*l THE FOLLONIUG EQUADOU ? T= 1t = 1 306 v Ma ** #PM l WHCP 6 : J = MOMEUT CFIMesTIA CF 90TATluG CARTS (MORA 4 LOAD) 6 RPM = RPM CHAUGE Ma = hVEFAGE ACCELEPATIUG TORGUE
= Mopx 70AQUE - LCAD TOAGUE
. .~
l t
- TvA 4s9H (EN DES.2 7s> TENNESSEE VALLEY AUTHORITY swict 03 or - cuasacr_.. OS VofJAG6 AUD MAMlu aUALW4 rno; sci 690 60U 016 f couruvio av ar.A e47 2/22/a8 esecueo av o^'t 2/2Wgg REsuts -
T'48L6 PI WMMABl26S THE EFFECT OF THE YOLTAGE TRAU9fE4T EpC7 OU Mctros ACCEL.cAAT1uG TIME AMD ITS EFFECT OM . LOAD %90EUC6 MIMIMUM TIME 14TT:AVAL A9 DEFlUED flJ REFegEUCE 94 AUD suMMAXiasp lu ATTHCHMEJJJ Dl. THE OVER L AP P 1 M G OF CCP ANO SIP ACC ELE R AT10N IS EV ALU A7E D AMo FOUN D AccGPTABLE COR DETAIL EL V A L U A7 ) O N SEE ATT AcH M E N7 D2
+
- t (L
t 0
---a ' - - -- ' ' '
TVA 489H (EN DES 2 78) TENNESSEE VALLEY AUTHORITY cwEtt D4 cf SU3 JECT l PR OJECT saw es-oi9 COMPU1tc BY GM DATE 2./22l @ $ CHECNED BY DATE 1 TABLE DI e 6.6 KV POTOR ACCELERATION TIPE l l l 1 I l l WORST CASE l MIN. TIME l ACCELERATION TIME l l l POTOR TERM l INTERVAL l l l l l l MOTOR lYOLTAGEPUl SEC l MEASURED l MIN.YOLTFOR l1005 RATED lMARGlW l l l6.6KYBASE-l (C) lFROMTESTlFIRSTONESEC lYOLTAGEFOR lBETWEEN l l l ' l l IN SECS l4100% AVERAGE lTHEENTIRE l3&5 l l l l l lTHERESTSEC lPER100 l SEC l l l l l l l SEC l l l l l l l l l l l (1) ! (2) I (3) I (6) I (5) l (6) I
' l l -
l l l l 1 1 lCCP *ll. 0.867 l 2.44 l 2.15 l 3.33 l 2.99 l l l51 l 0.833 l 3.84 l 2.80 l 3.39 l 3.01 l C.45 l lRHR l 0.811 l 3.13 l 1.83 l 1.85 l 1.39 l 1.28 l lERCW l 0.782 l 2.4 l 1.56 l 1.67 l 1.20 l 0.73 l lAFW l 0.778 l 6.25 l 3.46 l 3.77 l 3.22 l 2.48 l l CSP l 0.798 l - l 2.56 l 2.79 l 2.35 l - l l l l l l l l l TIMER INACCURACY
/ 2.a4 /
2 5 MINIMUM INTERVAL TIME ACCOUNTING FOR TIMER INACCURACY l Margin is not applicable since CCP and $1 ptrrp trotor starts could overlap; however, this t ' condition has been considered in the calculation, and it has been established that this overlap will not cause any additional drop over what has been observed during testing. ! / 1 [
TVA 480H (EN DES-2 78) *
.TENNES3EE VALLEY AUTHORITY ' surer D S o, SUBJECT Ob OLTAGE. Auo M4ecio AMALYS16 pno;ter 500 SGO-E3-ots oW cowuvro s<
[. on, - 2/22/ a 8 cHecxto av {y o^ts Ig2-Qg A CCE L E R ATloM 'Ti M E C A t c.0 L A I t O h3 FoH MINI M U M M OT O ft TERMINAL VOLT A G E RE F E R To T ABLE - B3 1
,,,m-- , , , , _- _
--,,--,e - -,.
. _ _ . . . t-0G__
- . _ . _ _ _ . . . _ . . _ _ - _ . _ . . SQN-E3-Ot5,
_ CMAMIMG _RU_M_ P_ _ _ _ _ _ _ _ _ f _ .. - - ._. .. ...._. .... - s: _ % . _.: u t _ 1. \ t - W _ '
..- 6Av w thilft J
- t. g g - A RPM T = koMEW OF INEATIA of RoTATiMa, PArJ3
= 528 8 lb N (motor.) - 26o Lk it'(POMP)
- 788.8 Lb hk N: ,AccELERATit4C, TcR.Q O E ..
- 8 UTC R .oR.Q U E - uAO w flat)G' b= _ 78% B a gpg 2.5'G l04 gpg 308 x Ma. Mo.
j FoR A RPM = too ta _256.104 M i M l al
= .~ l i
4 Q ?... - _S Q M - E. 3 - 015 Cr@8AING,_P_0M P_. _ . . _ _ _
--- - - .--. . . - . v . n _-34 _ :. e 3.n s-py
.C
, --r .co
_P> fa_l. 1,, _2_-) s'- t8 Y = 100% Fuu. Vo LTAC,6 ' t : - E EG,to4 Mw TOTA) Acc El.ER.ATN6 ARPM ida. w Lb Q A CC El.E R AT)N C= TIVE. , S E C. . TlH Ej TIN SEC.,
~
0 - 1o0 1855 c.13 8 o. iss Ioo - 20 o 1870 o.I37 o.2.75 Eco -3co 17oo o. t r i o,42.cu Soo 400 , 1545 o. I fog o.59L 400- Foo 169 o o. t F6 6,74% soo fooo 1690 o. t ECe o.904 6co-7oo 1697 o, t Efo n.obo 700- 800 1985 0,16't 1.1 17 800-9cc t r.o 0lH 1."60(o
$oo - (coo 1960 o.17 5" 1.% l 1000.I100 1900 c.18 3 \.7 %
Jioo.#2co 1330 c.19 3 l937 12.co I'3Co 12.7 0 o.102. 2.. \Y) I3oo-19eo Itoo o. Li'5 1.352. 4oo-1700 11 6 o e.tt\ 2.573 15eo- i6oo is so o.162. 2.73y l6co -1700 t 77 o o. 64 r ?.80o 17oo- 1600 2440 c.noF Z 967 i .
~ ? *
,c
-.e O b_ :=
S G N - E 3 - 013 CH A% LNG _PoM P. n a n 4kC_ wc 2-JE -88_ I
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