摘要
直流系统分布电容自放电可能引起出口继电器误动及断路器误跳。在简单分析分布电容引起断路器误动原因的基础上,分别对直流系统正极接地、负极接地及出口继电器线圈接地三种情况进行讨论分析。通过公式推导得出各种接地情况下继电器线圈的动作电压,并对一点接地引起出口继电器误动及断路器误跳的分布电容大小进行了理论计算。
The self-discharge of DC system distribution capacitance may cause the misoperation of export relay and the incorrect tripping of breaker. Based on the simple analysis of the breaker misoperation caused by distribution capacitance, three situations is discussed and analyzed which are positive grounding, negative grounding, and export relay coil grounding respectively. The action voltage of the relay coil in every situations are obtained by formula derivation, and the distribution capacitance of the one point grounding that cause the export relay misoperation and breaker incorrect tripping, is calculated in theorv.
出处
《广西电力》
2013年第3期64-66,73,共4页
Guangxi Electric Power
关键词
直流系统
分布电容
断路器误跳闸
DC system
distribution capacitance
breaker incorrect tripping
