Impact Analysis of Power System Fault Inside Power Plant on Power Supply Switching Mechanism

doi:10.11930/j.issn.10.11930.2015.8.141

Abstract

Abstract: High speed power supply switching equipment is based on assumption of same phasor angle between operation and backup voltage. However, the assumption is not satisfied when fault happens in the system. The impact of fault scenario on power supply switching mechanism is analyzed. The fault analysis during two-phase grounding fault is conducted which shows different phase angle between operation and backup source voltage. The practical bus bar residual voltage during fault is also analyzed. Because of difference between practical and theoretical value, high speed switching may not be successful. Some advice related to high speed switching device settings are given with consideration of possible electric system fault.

Key words: auxiliary power, transfer mode, residual voltage, characteristic, phasor

CLC Number:

TK01

LI Zifeng. Impact Analysis of Power System Fault Inside Power Plant on Power Supply Switching Mechanism[J]. journal1, 2015, 48(8): 141-145.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.8.141

https://www.electricpower.com.cn/EN/Y2015/V48/I8/141

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