RDSK

EE5374 POWER SYSTEM PROTECTION REALYING

Project Report

IEEE 30 Bus SystemPower Flow Analysis, Contingency Analysis And Fault Analysis

Professor: Dr. Wei-Jen Lee

Submitted by,Prasanna kumar1001153515

Contents :a.) Project description One line diagramb.) Design Procedure Create system model in power world simulator Comparing the resultsc.) Contingency analysisd.) Fault analysis: Single line to Ground fault 3 phase balanced fault Line to line fault Double line to ground faulte.) Conclusion f.) Tables Bus data Shunt capacitor data Branch data

a.) Project Description: The report contains designing process IEEE 30bus system which is modelled in the power world simulator according to the system shown in one line diagram and data given. Then power flow is run in simulator and compared the results with the results given in the data file. Contingency Analysis considering the impact of any single transmission line or transformer outage is run while explaining the 3 cases with most violations. Then finally fault analysis for four different types of faults Single-Phase-to-Ground (Phase A), Two-Phase Short (Phase B and C), Two-Phase-to-Ground (Phase B and C), and Three-Phase-Short are compared at bus 6, 15, 28. The One line diagram of IEEE 30 bus system is shown in fig 1 below. The line data, bus data and load flow results are given in tables 1 and 2 in tables section. Data is on 100 MVA base.One Line Diagram:Figure 1:d

b.) Design Procedure: Create System Model in power world simulator:Model is created with the data given. Bus 1 is the swing bus. The required files .PWB, .PWD files attached along with this report.

Note:The transformer tap ratio for the branches of three winding transformer 12-13, 9-10, 9-11 is 1.000

Comparing the Results:After simulating the IEEE30 bus system at run mode . The results were taken from model explorer. Compare the results from model explorer to the given data values. We get respective difference in the measured values and referred values.Following is the model explorer results after running the power flow.

Comparing per unit voltages and angles obtained with given results:Final(Given)Result(Observed)

voltageangle Voltageangle voltage diffangle diff

Glen Lyn 11.0601.06000.0000

Claytor 21.043-5.481.043-5.350.000-0.13

Kumis 31.021-7.961.021-7.530.000-0.43

Hancock 41.012-9.621.012-9.280.000-0.34

Fieldale 51.01-14.371.010-14.160.000-0.21

Roanoke 61.01-11.341.010-11.060.000-0.28

Blaine 71.002-13.121.002-12.860.000-0.26

Reusens 81.01-12.11.010-11.810.000-0.29

Roanoke 91.051-14.381.051-14.110.000-0.27

Roanoke 101.045-15.971.045-15.70.000-0.27

Roanoke 111.082-14.391.082-14.110.000-0.28

Hancock 121.057-15.241.057-14.940.000-0.3

Hancock 131.071-15.241.071-14.940.000-0.3

Bus 141.042-16.131.042-15.830.000-0.3

Bus 151.038-16.221.038-15.920.000-0.3

Bus 161.045-15.831.044-15.520.001-0.31

Bus 171.04-16.141.040-15.860.000-0.28

Bus 181.028-16.821.028-16.540.000-0.28

Bus 191.026-171.026-16.710.000-0.29

Bus 201.03-16.81.030-16.520.000-0.28

Bus 211.033-16.421.033-16.140.000-0.28

Bus 221.033-16.411.033-16.130.000-0.28

Bus 231.027-16.611.027-16.320.000-0.29

Bus 241.021-16.781.022-16.49-0.001-0.29

Bus 251.017-16.351.017-16.060.000-0.29

Bus 261-16.771.000-16.480.000-0.29

Cloverdale 271.023-15.821.023-15.540.000-0.28

Cloverdale - 281.007-11.971.007-11.690.000-0.28

Bus 291.003-17.061.003-16.770.000-0.29

Bus 300.992-17.940.992-17.650.000-0.29

Minor changes in generation power is observed: Given dataMeasured values

Generation MWGeneration MvarGeneration MWGeneration Mvar

1260.2-16.1260.95-16.79

5037036.85

8037.3037.14

11016.2016.17

13010.6010.62

The mismatch of the values in angle is because the actual process to compute the load flow for the IEEE 30 bus system is an algorithm using the iterative method which we are not using in this project.

c.)Contingency analysis:

First voltage limits have to be defined in limit monitoring settings at case information from low value from .9000 to .9500 and high value from 1.100 to 1.0500 .

In Run mode press solve after solving the case click on the contingency analysis, contingencies are inserted with the auto insert for the single transmission line or transformer outage. A total of 41 contingencies are inserted. Then by clicking on auto run all the contingencies are solved. Then sort the results by violations column. We get 3 cas es with most violations.

Most violations occur in the following scenarios: Open transformer Cloverdale 28 Cloverdale 27 (9 violations) Open line Roanoke 10 - Bus 17 (6 violations) Open line Cloverdale 27 - Bus 30 (6 violations)

1. Open transformer Cloverdale 28 Cloverdale 27:By clicking on the first case, we get the violations details in the below windows.

Violations are occurred at the buses 1, 11, 12, 13, 25, 26, 27, 29, 30In what actually occurred tab above we can see that opened flow of 18.75MVA occurs.

2. Open line Roanoke 10 - Bus 17:By clicking on the second case, we get the violations details in the below windows.

Violations are occurred at the buses 1, 9, 10, 11, 12, 13.In what actually occurred tab above we can see that opened flow of 6.92MVA occurs.

3. Open line Bus 27 - Bus 30:By clicking on the third case, we get the violations details in the below windows.

Violations are occurred at the buses 1, 9, 11, 12, 13, 30.In what actually occurred tab above we can see that opened flow of 7.28MVA occurs.

From the contingency result we get, Open transformer from 28-27 has 9 violations will affect the system most and open transformer from 4-12 and 12-13 has only 2 violations each which affects the system least.

Fault Analysis:

d. Fault analysis:

At buses 6, 15, 28 we do Short Circuit Analysis for single line to ground fault, 3 phase balanced fault, line to line fault, double line to ground fault.

a. Single Line to Ground Fault(SLG):Bus 6: (SLG) Short circuit current at fault location

Fault current is 1944 Amps.

Short circuit contribution from branches that are connected to the fault location:From busFrom NameTo busTo NameCircuitXfrmrPhase Cur A From Phase Cur B From Phase Cur C From Phase Cur A To Phase Cur B To Phase Cur C To

2Claytor - 26Roanoke - 61NO431.84284.49207.13433.73279.31210.79

4Hancock - 46Roanoke - 61NO610.5316.63309.41610.65314.61309.73

6Roanoke - 628Cloverdale - 281NO96.7585.4465.4796.783.2767.89

6Roanoke - 610Roanoke - 101YES78.6293.5837.22304.72362.72144.25


6Roanoke - 68Reusens 81NO450.5587.1188.06450.4287.05188.76

6Roanoke - 67Blaine 71NO351.45136.47178.68351.06134.43181.42

Voltages at nearby buses:Fault Data Buses

NumberNamePhase Volt APhase Volt BPhase Volt CPhase Ang APhase Ang BPhase Ang C

1Glen Lyn 10.327411.229471.0975220.60-125.45130.52

2Claytor - 20.261851.231341.072866.28-130.69126.24

4Hancock 40.085021.247411.085895.16-137.22125.65

5Fieldale 50.273401.215120.99250-24.80-137.50118.12

6Roanoke 60.000001.266911.096150.00-139.66125.07

7Blaine 70.107971.240931.04464-26.11-139.38122.12

8Reusens 80.070791.250531.06709-29.55-139.00123.29

9Roanoke 90.628390.994050.93062-7.98-122.4295.51

10Roanoke 100.619910.988930.92348-9.29-123.8493.79

11Roanoke 110.731341.031400.97966-9.75-124.8197.74

ii).Bus 15:(SLG) Short circuit current at fault location

Fault current is 5827.64 amps. Short circuit contribution from branches that are connected to the fault location:

From busFrom NameTo busTo NameCircuitXfrmrPhase Cur A From Phase Cur B From Phase Cur C From Phase Cur A To Phase Cur B To Phase Cur C To

12Hancock 1215Bus 151NO3156.23295.24278.13156.23295.24278.1

14Bus 1415Bus 151NO795.2529.7323.36795.2529.7323.36

15Bus 1518Bus 181NO964.31101.8996.76964.31101.8996.76

15Bus 1523Bus 231NO950.8196.981.06950.8196.981.06

Voltages at nearby buses:

Fault Data Buses


12Hancock 120.391891.04680.97509-23.51-129.11101.12

14Bus 140.202241.065330.98756-35.27-133.11103.79

15Bus 1501.07131.035680-136.8106.13

18Bus 180.204251.030010.98934-19.7-134.06102.21

23Bus 230.185891.030920.99448-17.01-134.31102.8

iii).Bus 28:(SLG) Short circuit current at fault location

Fault Current is 1506.49 Amps. Short circuit contribution from branches that are connected to the fault location:


6Roanoke 628Cloverdale - 281NO1122.9398.3951.771123.5895.7953.64

8Reusens 828Cloverdale - 281NO340.4120.3322.55342.687.423.79

28Cloverdale - 2827Cloverdale 271YES62.73100.742.22242.89389.9163.47



6Roanoke - 60.242011.207471.06550-12.11-137.84121.66

8Reusens - 80.253331.203551.05334-16.40-137.98120.59

27Cloverdale - 270.601280.969450.90087-8.63-123.4793.81

28Cloverdale - 280.000001.256771.121650.00-141.59124.27

b. 3 Phase Balanced Fault:Bus 6:(3P) Short circuit current at fault location

Fault current is 2674.92Amps.

Short circuit contribution from branches that are connected to the fault location:


2Claytor - 26Roanoke - 61NO506.22506.22506.22507.9507.9507.9


6Roanoke - 628Cloverdale - 281NO122.02122.02122.02121.98121.98121.98



6Roanoke - 68Reusens - 81NO504.84504.84504.84504.75504.75504.75

6Roanoke - 67Blaine - 71NO420.59420.59420.59420.3420.3420.3


Fault Data Buses


2Claytor - 20.215540.215540.2155416.52-103.48136.52

4Hancock 40.081680.081680.0816812.66-107.34132.66

6Roanoke 60.000000.000000.000000.000.000.00

7Blaine - 70.082920.082920.08292-13.31-133.31106.69

8Reusens 80.050410.050410.05041-27.51-147.5192.49

9Roanoke 90.160610.160610.16061-14.61-134.61105.39

10Roanoke 100.148050.148050.14805-14.99-134.99105.01

28Cloverdale - 280.017360.017360.01736-22.43-142.4397.57

Bus 15:(3P) Short circuit current at fault location

Fault Current is 6004.79 Amps. Short circuit contribution from branches that are connected to the fault location:


12Hancock 1215Bus 151NO3194.623194.623194.623194.623194.623194.62

14Bus 1415Bus 151NO812.74812.74812.74812.74812.74812.74

15Bus 1523Bus 231NO1005.11005.11005.11005.11005.11005.1

15Bus 1518Bus 181NO1003.761003.761003.761003.761003.761003.76



12Hancock - 120.267030.267030.26703-22.64-142.6497.36

14Bus 140.138370.138370.13837-33.79-153.7986.21

15Bus 150.000000.000000.000000.000.000.00

18Bus 180.139670.139670.13967-19.12-139.12100.88

23Bus 230.129500.129500.12950-16.11-136.11103.89

Bus 28:(3P) Short circuit current at fault location

Fault current is 2136.29Amps.



28Cloverdale - 2827Cloverdale 271YES125.21125.21125.21484.83484.83484.83





6Roanoke - 60.221220.221220.22122-5.32-125.32114.68

8Reusens - 80.219620.219620.21962-10.21-130.21109.79

27Cloverdale - 270.109760.109760.109763.02-116.98123.02

28Cloverdale - 280.000000.000000.000000.000.000.00

c. Line to Line Fault:Bus 6: (LL) Short circuit current at fault location

Fault current is 2316.55Amps. Short circuit contribution from branches that are connected to the fault location:


2Claytor 26Roanoke - 61NO253540.69352.21252.88537.53360.52


6Roanoke - 628Cloverdale - 281NO80.8265.4514680.9865.84145.81



6Roanoke - 68Reusens - 81NO132.71373.79501.38131.69373.62501.24

6Roanoke - 67Blaine - 71NO165.54283.56445.69165.01284.61444.51


Fault Data Buses


2Claytor - 21.043140.484080.61597-5.35-164.38158.32

4Hancock 41.011780.483920.53635-9.28178.51163.69

6Roanoke 61.010270.505130.50513-11.06168.94168.94

7Blaine - 71.002380.506870.50575-12.86175.28158.97

8Reusens 81.010000.518520.49498-11.81172.84163.32

9Roanoke 91.050950.544750.54239-14.11-179.31151.04

10Roanoke - 101.045200.536560.53963-15.70178.13150.56

28Cloverdale - 281.006830.506430.50083-11.69169.98166.62

Bus 15:(LL) Short circuit current at fault location

Fault Current is 5200.3 Amps.



12Hancock - 1215Bus 151NO316.832889.772647.24316.832889.772647.24

14Bus 1415Bus 151NO28.73712.76695.1328.73712.76695.13

15Bus 1523Bus 231NO98.13844.11898.6998.13844.11898.69

15Bus 1518Bus 181NO105828.44911.32105828.44911.32


Fault Data Buses


12Hancock 121.057140.562290.55788-14.94-175.71145.67

14Bus 141.042310.552290.54707-15.83-177.38145.54

15Bus 151.037720.544930.54462-15.92-178.19146.33

18Bus 181.028200.535230.53642-16.54179.85147.11

23Bus 231.027230.532820.53488-16.32179.54147.89

Bus 28:(LL) Short circuit current at fault location

Fault Current is 1850.02Amps. Short circuit contribution from branches that are connected to the fault location:




28Cloverdale - 2827Cloverdale - 271YES81.4776.09145.08315.43294.6561.74


Fault Data Buses


6Roanoke - 61.010270.522000.55789-11.06-169.65148.96

8Reusens - 81.010000.534620.54459-11.81-170.98147.76

28Cloverdale - 281.006830.503410.50341-11.69168.31168.31

d. Double Line to ground Fault:Bus 6: (LLG) Short circuit current at fault location



2Clayton 26Roanoke - 61NO245.44484.51475.57243.68485.82477.69

4Hancock 46Roanoke - 61NO309.25783.38735.07308.33783.51735.24


6Roanoke 610Roanoke - 101YES67.5374.76135.44261.73289.78524.97

6Roanoke 69Roanoke - 91YES150.94249.42357.7719485.5332198.6946186.69

6Roanoke 68Reusens - 81NO137.98435.19528.21138.7435.1528.09

6Roanoke 67Blaine - 71NO150.88307.63469.74151.88307.42469.34


Fault Data Buses


2Claytor - 21.199400.201610.26401-2.24-116.35137.83

4Hancock - 41.222940.074920.08997-6.23-111.53130.56

6Roanoke - 61.240790.000000.00000-7.850.000.00

7Blaine - 71.197790.077090.10816-8.86-151.12108.56

8Reusens - 81.214940.057320.06222-8.19-162.84103.42

9Roanoke - 90.889320.473080.45862-11.49-174.42150.88

10Roanoke - 100.882520.463770.45521-13.00-176.96150.65

28Cloverdale - 281.234430.012840.02143-8.27-150.2889.13

Bus 15:(LLG) Short circuit current at fault location



12Hancock - 1215Bus 151NO243.993175.973176.32243.993175.973176.32

14Bus 1415Bus 151NO23.99791.88816.5523.99791.88816.55

15Bus 1523Bus 231NO76.61955.081003.876.61955.081003.8

15Bus 1518Bus 181NO92.9957.841011.6592.9957.841011.65


Fault Data Buses


12Hancock - 120.961570.338530.34943-12.54-161.41114.12

14Bus 141.012130.173390.18185-13.37-172.88102.3

15Bus 151.0681900-14.8700

18Bus 180.991830.177210.1816-15.21-157.5117.73

23Bus 230.998950.161190.1665-15.13-153.92119.71

Bus 28:(LLG) Short circuit current at fault location

Fault Current is 1822.05Amps. Short circuit contribution from branches that are connected to the fault location:




28Cloverdale - 2827Cloverdale - 271YES64.5576.63140.46249.93296.71543.86


Fault Data Buses


6Roanoke - 61.183320.209150.24760-8.21-131.57114.65

8Reusens - 81.173980.213930.25096-8.73-138.65111.79

27Cloverdale - 270.863030.415550.46669-12.94179.76155.77

28Cloverdale - 281.244620.000000.00000-9.190.000.00

Summary of Fault currents:Bus Number/FaultSingle line to ground(Amps)3 phase balanced(Amps)Line to Line(Amps)Double Line to ground(Amps)

61944.062674.922316.551510.16

155827.646004.795200.35658.42

281506.492316.21850.081155.3

Currents Behavior: From above table we can say that, for a fault at bus 6 and bus 28, Il-l-g< Il-g < Il-l< Il-l-l Fault at bus 15 has a severe effect with maximum fault current is occurring for any fault. 3 phase balanced fault at bus 15 has the maximum short circuit current compared to all buses in consideration, while the 3 phase balanced fault has maximum short circuit current of all faults at a bus.

Voltages Behavior: For the bus with Single Line to Ground fault, phase A is connected to ground, thus having zero voltage and a slight increase in the voltages at other buses. For the bus with 3 phase balanced fault, all the three phases are connected to ground, having zero voltage in all phases. Voltages at nearby buses is dropped by 80-90%. For the bus with Line to Line fault, phase B and phase C are shorted, having equal per unit voltages in both phases. For the bus with double Line to ground fault, phase B and phase C are connected to ground, having zero per unit voltages in both phases.

e. Tables:

1. Table: Bus dataBus NoBus NameBase KVDesired Volts PUTypeLoad MWLoad MvarGeneration MWGeneration MvarMvar min Voltage limitMvar max Voltage limit

1Glen Lyn1321.06300260.2-16.100

2Claytor1321.045221.712.7405050-40

3Kumis132102.41.20000

4Hancock132107.61.60000

5Fieldale1321.01294.21903740-40

6Roanoke13210000000

7Blaine1321022.810.90000

8Reusens1321.0123030037.340-10

9Roanoke110000000

10Roanoke33105.820000

11Roanoke111.082200016.224-6

12Hancock331011.27.50000

13Hancock111.071200010.624-6

14Bus 1433106.21.60000

15Bus 1533108.22.50000

16Bus 1633103.51.80000

17Bus 17331095.80000

18Bus 1833103.20.90000

19Bus 1933109.53.40000

20Bus 2033102.20.70000

21Bus 21331017.511.20000

22Bus 223310000000

23Bus 2333103.21.60000

24Bus 2433108.76.70000

25Bus 253310000000

26Bus 2633103.52.30000

27Cloverdale3310000000

28Cloverdale13210000000

29Bus 2933102.40.90000

30Bus 30331010.61.90000

2. Table: Shunt Capacitor dataBus No.Susceptance puSusceptanceMvar (pu*base)

100.1919

240.0434.3

3. Table: Branch dataBranch Data

SnoBus FromBus ToAreaZoneCircuitR puX puB puTransformer Ratio

1121110.01920.05750.05280

2131110.04520.16520.04080

3241110.0570.17370.03680

4341110.01320.03790.00840

5251110.04720.19830.04180

6261110.05810.17630.03740

7461110.01190.04140.0090

8571110.0460.1160.02040

9671110.02670.0820.0170

10681110.0120.0420.0090

116911100.20800.978

1261011100.55600.969

1391111100.20801.000

1491011100.1101.000

1541211100.25600.932

16121311100.1401.000

1712141110.12310.255900

1812151110.06620.130400

1912161110.09450.198700

2014151110.2210.199700

2116171110.05240.192300

2215181110.10730.218500

2318191110.06390.129200

2419201110.0340.06800

2510201110.09360.20900

2610171110.03240.084500

2710211110.03480.074900

2810221110.07270.149900

2921221110.01160.023600

3015231110.10.20200

3122241110.1150.17900

3223241110.1320.2700

3324251110.18850.329200

3425261110.25440.3800

3525271110.10930.208700

36282711100.39600.968

3727291110.21980.415300

3827301110.32020.602700

3929301110.23990.453300

408281110.06360.20.04280

416281110.01690.05990.0130

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