3.6~40.5kV断路器容性负载开合试验回路研究

Research on Capacitive Load Switching Test Circuit of 3.6~40.5kV Circuit-Breaker

高压断路器(尤其是真空断路器)开合容性电流时,会产生电压和电流的暂态现象,可能导致很高的过电压和关合涌流,甚至会导致重击穿对电网造成严重威胁。对电容性负载的使用工况进行了分析,设计了适用于3.6~40.5kV电压等级的试验回路以满足该电压等级的开关试验,并探讨了高压断路器容性电流开合试验方法。该试验回路在大容量试验室得到了很好的应用,各项容性开合试验数据均符合标准要求。

When the high voltage circuit-breaker(especially the vacuum circuit-breaker)switches capacitive current,the transient phenomena of voltage and current will appear which probably causes excessive overvoltage and inrush current,or even causes a restrike threatening the security of power grid.In this paper,the operating condition of capacitive load is analyzed,and the test circuit suitable for 3.6~40.5kV voltage is designed to meet the requirements of the switch tests,and additionally,the capacitive current switching test of high voltage circuit breaker is discussed.Lastly,this test circuit is applied well in the large-capacity laboratory,and all the testing data of capacitive switching conform to the standard.