摘要
采用电抗器限制500 kV线路的短路电流是一种可行的方法。但在限制短路电流的同时,电抗器的引入会引起断路器瞬态恢复电压的变化。本文以我国华东电网采用500 kV电抗器限制短路电流的工程项目作为背景,分析了不同短路情况下电抗器对瞬态恢复电压的影响,分析表明,三相短路时对瞬态恢复电压的影响要比单相短路时严重,采用并联电容器的方法可以降低瞬态恢复电压的影响,但要求的电容器容量较大。
Air-cored current-limiting inductor （CLI） is used to limit the magnitude of fault current in 500 kV power system. While limiting short circuit current, effects of CLI on transient recovery voltage （TRV） are researched in this paper. Combining with the project of East China power system, the effects of CLI on TRV is analyzed in detail. The results show that the effect of three-phase short circuit is serious than that of single-phase short circuit, and parallel capacitor can reduce the TRV, but the capacitance is too large.
出处
《华北电力技术》
CAS
2008年第1期11-15,共5页
North China Electric Power
关键词
500
kV限流电抗器
瞬态电压
并联电容器
500 kV current-limiting inductor
transient recovery voltage
paralleled capacitor
