摘要
随着南方电网西电东送规模的日益扩大,受端电网的暂态电压稳定问题日益凸显。深入探讨了南方电网的受端系统的暂态电压稳定问题出现的机理和影响因素,通过对失稳故障的分析表明交流线路、直流换流站的无功需求会逐步恶化受端系统的稳定性,最终由局部地区的负荷失稳导致整个区域发生电压崩溃。针对失稳故障分析比较了相应的稳定措施,其中动态无功补偿措施能够有效地抑制异步电动机诱发的电压崩溃。
With the development of transmission of electricity from the west to the east in south China power grid, the transient voltage stability problem emerges in received power grid gradually. This paper discusses the transient voltage stability mechanism and influence factor. The result shows that reactive power requirements of AC lines and DC inverter will deteriorate voltage stability in the dynamic process, and the local areas load unstable will cause voltage collapse in the whole,system finally. The corresponding control measures are also analyzed, and dynamic reactive compensation can restrain voltage collapse ~aused by induction motor load. This project is supported by National Natural Science Foundation of China（No.50337010） and National Natural Science Foundation of Guangdong Province（No.06025630）.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第10期1-4,18,共5页
Power System Protection and Control
基金
国家自然科学基金重点项目 (50337010)
广东省自然科学基金项目 (06025630)~~
关键词
交直流混合系统
暂态电压稳定
受端电网
电压崩溃
AC/DC hybrid power systems
transient voltage stability
received power grid
voltage collapse
