500 kV断路器合闸电阻故障分析及运行建议

Fault Analysis and Operation Suggestions of Circuit Breaker's Closing Resistor for 500 kV

断路器加装合闸电阻是抑制高电压等级、长距离运输线路空载合闸或单相重合闸等操作过电压的主要措施。合闸电阻的设计、制造对500 kV断路器都会产生重要影响。当断路器的合闸电阻发生故障时,不仅会降低断路器的性能,还会对整个供电系统产生影响。文中对一起500 kV断路器合闸电阻进行了故障分析,为断路器合闸电阻的应用提供一定参考。

Adding a closing resistor to a circuit breaker is the main measure to suppress operating overvoltage during no-load closing or single-phase reclosing of high-voltage and long-distance transport lines.The design and manufacture of the closing resistors have a very important impact on the 500 kV circuit breaker.When the closing resistance of the circuit breaker fails,not only will the performance of the circuit breaker be greatly reduced,but also the entire power supply system will be affected.The operating risk of the power system will be increased.The power quality of the power system will be reduced,and the power failure will occur.This paper mainly analyzes the failure of a 500 kV circuit breaker closing resistor recently,and conducts some research and discussion on the application and maintenance of the closing resistor.