《与超高压输电线路加装串补装置有关的系统问题及其解决方案》.pdf

第28 卷 第6 期 电 网 技 术 Vol. 28 No. 6 2004 年3 月 Power System Technology Mar. 2004 文章编号：1000-3673 （2004 ）06-0026-05 中图分类号：TM89 文献标识码：A 与超高压输电线路加装串补装置有关的 系统问题及其解决方案 钟 胜 （中南电力设计院，湖北省武汉市 430071 ） PROBLEMS CAUSED BY ADDING SERIES COMPENSATION DEVICES TO EHV TRANSMISSION SYSTEM AND THEIR SOLUTION ZHONG Sheng （Mid-South China Electric Power Design Institute ，Wuhan 430071 ，Hubei Province ，China ） ABSTRACT ：Taking the Fixed Series Compensation (FSC) 关键词：串联电容补偿；过电压；潜供电流；次同步谐振 and the Thyristor Controlled Series Compensation (TCSC) （SSR）；暂态恢复电压（TRV ）；电力系统 respectively installed at Hechi and Pingguo substations in 1 引言 South China Power Grid for example, the situation of power grid after the series compensation devices are installed is 采用串联电容补偿技术可提高超高压远距离 deeply researched and it is pointed out that a series of 输电线路的输电能力和系统稳定性，且对输电通 systematic problems, such as the arising of overvoltage level, 道上的潮流分布具有一定的调节作用。采用可控 enlargement of coupling current and the possibility of taking 串补还可抑制系统低频功率振荡及优化系统潮流 place the subsynchronous resonance (SSR), are caused by the 分布；但在系统中增加的串联电容补偿设备改变 inherent characteristics of series compensation devices. After 了系统之间原有的电气距离，尤其是串补度较高 the research it is held that when internal fault takes place in the transmission line where the series compensation device is 时，可能引起一系列系统问题，因此在串补工程 located, the corresponding protective measures, e.g., the forced 前期研究阶段应对这种可能性进行认真研究，并 triggering the by-pass gap, etc., is the