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电网技术  2013 

基于扩展GO法的HVDC保护系统可靠性评估

, PP. 1069-1073

Keywords: 高压直流输电,保护系统,可靠性评估,冗余配置

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Abstract:

高压直流输电(highvoltageDCtransmission,HVDC)保护系统因为含有多个共有信号,基于传统的状态组合法计算可靠性极其复杂。文章将成功流(goaloriented,GO)法引入到直流保护系统的可靠性评估中,以阀短路保护为例,建立了其GO模型。同时,通过结合图论中源点和汇点的概念将GO图进行分解,使得含共有信号的状态累积概率公式可直接用于多状态系统的可靠性计算,减小了由于多个共有信号导致的较大的计算量。在此基础上,比较了几种典型冗余配置下整个保护系统的误动率(拒动率)分别随测量装置和保护装置的误动率(拒动率)变化的曲线,得出了直流保护系统的一些可靠性规律。

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