摘要
在变电站补偿电容器损坏经常发生,特别是在使用真空断路器切除无功补偿用并联电容器时,这严重影响了并联电容器的安全运行。本文针对一起较为少见的并联电容器组分闸多次多相重击穿故障,结合故障录波数据及对故障电容器的解体检查,用ATPDraw仿真程序模拟了这一过程,分析认为电容器用真空断路器分闸时多次重击穿产生的过电压及涌流是电容器绝缘击穿故障的主要原因,降低投切电容器用真空断路器的重燃率对于减少并联电容器故障至关重要。
Capacitor damage is a frequent occurrence in the substation, which, especially in switc- hing shunt capacitor by vacuum circuit breaker, affects seriously safe operation of shunt capacitor. For repeatedly multi-phase restrike fault of shunt capacitor during opening operation in this paper, the process is simulated by ATPDraw simulation procedure based on data of wave recorder and disas- sembly inspection of capacitor. The analysis results indicate that the main reason of the capacitor di- electric breakdown is the overvohage and inrush current which caused by multiple restrikes during the vacuum circuit breaker opening; and reduce reignition rate of vacuum circuit breaker switching capacitor is crucial to reduce the fault of shunt capacitor.
出处
《电力电容器与无功补偿》
2012年第4期70-73,共4页
Power Capacitor & Reactive Power Compensation
