SVC与TCSC优化配置在电力系统静态电压稳定中的应用

摘要

In order to improve stability of static voltage of the power system,it is proposed to combine static var compensator (SVC)with thyristor controlled series compensator (TCSC)in power system lines and use dynamic continuous trend method for calculating static voltage stability margin of the power system.Firstly,steady state model for SVC and TCSC is construc-ted,concepts of node parameter factor and branch parameter factor are introduced and modal analysis method is used to de-termine vulnerabilities of system busbar and branches.In addition,parallel SVC is adopted for reactive power compensation for weak spots of busbar,series TCSC is used for optimizing power distribution of weak lines and dynamic continuous trend method is applied to work out static voltage stability margin.IEEE-1 4 node system is used for simulating calculation,and static voltage stability margin values of device without flexible alternative current transmission system (FACTS),single in-stallation of SVC or TCSC,combined installation of SVC and TCSC are compared.Results indicate the proposed new meth-od is able to quickly and correctly improve static voltage stability of the power system.%为提高电力系统静态电压的稳定性,提出将静止无功补偿器(static var compensator,SVC)与可控串联补偿装置(thyristor controlled series compensator,TCSC)相结合并作用于电力系统线路中,运用动态连续潮流法计算电力系统静态电压稳定裕度的新方法。首先建立SVC与TCSC的稳态模型；然后引入节点参数因子和支路参数因子的概念,运用模态分析法确定系统母线和支路的薄弱点,并联 SVC 对母线薄弱点进行无功补偿,串联TCSC优化薄弱线路功率分配；最后运用动态连续潮流法求出静态电压稳定裕度。以 IEEE-14节点系统进行仿真计算,并对无灵活交流输电(flexible AC transmission system,FACTS)装置、单独安装 SVC 或 TCSC、SVC和TCSC相结合情况下的系统静态电压稳定裕度值作比较,结果表明所提新方法能够快速、准确地提高电力系统静态电压稳定性。