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Power system fault analysis ppt
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- 23. 2 2 2 2 1 1 3 3 1 2 1 3 2 3 1 3 2 1 3 2
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- 27. 9090 I2 45135 I2 45135 0180 V1V2 0180 V1 225 315 I1I1 270270 C PhaseSymmetrical Component View of an A to B Phase FaultC Phase Symmetrical Component View of an A to B Phase Fault
- 30. 9090 45135 45135 V0 V1V2 0180V0 V1V2 225 315225 315 I0I1 I0I1 I2 270 I2 270
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- 34. 9090 45135 45135 I2I2 I0I0 V1 0180V0 V1 V2 V0V2 225 315225 315 I1I1 270
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- 36. IA IB ICIRIA IB IC IR 100 0 100 0 -100-100 100100 0 -100-100 100100 0 -100 0 -100 200200 -0-0 -200-200 1 2 3 4 5 6 7 8 9 10 111 2 3 4 5 6 7 8 9 10 11 Cycles
- 37. 90 45135 45135 V2 I1 V2 0180 I0 I1 I20180 I0 I2 V1V1 225 315225 315 270270
- 39. Fault incidenton voltage Fault incident on voltage zero point results inzero point results in Asymmetrical current waveAsymmetrical current wave
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- 45. Dead time -1secDead time -1 sec
- 46. Dead time -1secDead time -1 sec
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- 53. In inductive circuitsthe current normally lags the voltage by 90, and magnetic flux isIn inductive circuits the current normally lags the voltage by 90, and magnetic flux is normally in phase with the inductive magnetizing current that has created it.normally in phase with the inductive magnetizing current that has created it. Therefore, at the transformer energization instant the required magnetic flux shouldTherefore, at the transformer energization instant the required magnetic flux should be at 90, to correspond to the high-side zero-voltage point. But the transformerbe at 90, to correspond to the high-side zero-voltage point. But the transformer magnetic circuit has no flux, and as a result the flux must start at the zero point andmagnetic circuit has no flux, and as a result the flux must start at the zero point andmagnetic circuit has no flux, and as a result the flux must start at the zero point and overshoot to twice the maximum value during the first voltage cycle. This will causeovershoot to twice the maximum value during the first voltage cycle. This will cause core saturation, forcing the generation of a sharp unidirectional peakingcore saturation, forcing the generation of a sharp unidirectional peaking nonsinusoidal magnetizing current waveform that may persist for several seconds.nonsinusoidal magnetizing current waveform that may persist for several seconds.
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- 63. Microsoft OfficeMicrosoft Office Word97 - 2003 DocumentWord 97 - 2003 Document
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- 72. VA VB VCIA IB IC 25 VA VB VC IA IB IC 0 25 -25 0 -25 25 0 25 -25 0 -25 25 0 25 -25 2500 0 2500 0 -2500 2500 0 -2500 0 -2500 2500 0 2500 0 -2500-2500 1 2 3 4 5 6 7 8 9 10 111 2 3 4 5 6 7 8 9 10 11 Cycles
- 73. IA IB ICIRIA IB IC IR 10000 00 -10000-10000 1000010000 0 -10000-10000 1000010000 00 -10000-10000 1000010000 00 -10000-10000 1 2 3 4 5 6 7 8 9 10 111 2 3 4 5 6 7 8 9 10 11 CyclesCycles
- 74. IA IB IC 10000 IAIB IC 10000 00 -10000-10000 1000010000 00 -10000-10000 10000 00 -10000-10000 1 2 3 4 5 6 7 8 9 10 111 2 3 4 5 6 7 8 9 10 11 CyclesCycles
- 75. IA IB ICIR 5000 IA IB IC IR 5000 00 -5000 50005000 00 -5000-5000 50005000 00 -5000-5000 25002500 00 -2500-2500 1 2 3 4 5 6 7 8 9 10 111 2 3 4 5 6 7 8 9 10 11 CyclesCycles
- 76. IA IB ICIRIA IB IC IR 100 0 100 0 -100-100 100100 0 -100 0 -100 100 00 -100 200200 -0-0 -200-200 1 2 3 4 5 6 7 8 9 10 111 2 3 4 5 6 7 8 9 10 11 CyclesCycles
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