一起典型的500 kV失灵保护误动分析

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一起典型的500 kV失灵保护误动分析

更新时间：2025-08-13

- 一起典型的500 kV失灵保护误动分析
- Automation of Electric Power Systems Vol. 31, Issue 8, Pages: 104-106(2007)
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- Published：2007
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[J]. Automation of electric power systems, 2007, 31(8): 104-106.
DOI：

[J]. Automation of electric power systems, 2007, 31(8): 104-106. DOI：

摘要

分析了一起具有代表性的失灵保护误动事故，其误动原因是由于光耦开入回路设计的不完善，在发生直流正极接地时，由于电缆存在较大的分布电容，造成光耦开入回路误导通而失灵保护动作出口。研究制定出华北电网的反事故措施，对相关元件的动作参数提出了明确要求。这些措施已经在华北电网得到普遍应用，其合理性和有效性已经通过现场试验和该次事故得到了证明。

Abstract

This paper discusses a mal-function of a typical 500kV Breaker failure protection detailedly. The reason is that the optical coupler’s inputting circuit is defective. When DC power supply is grounded

the optical coupler can be put through by distributed capacitance

which results in the tripping of the breaker failure protection. We put forward some effectual measures to prevent the mal-function according to the conclusion of this paper. The measures are applied universally in North China Power Systems and their rationality and validity have been proved in the test and practice. We sincerely hope to provide valuable reference for our counterparts of electric power system.

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Related Author

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Related Institution

Research Center for Photovoltaic System Engineering of Ministry of Education (Hefei University of Technology)

School of Electrical Engineering and Automation, Hefei University of Technology

Maintenance Company of State Grid Shanghai Municipal Electric Power Company

North China Electric Power University

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