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电网技术  2010 

高压直流输电保护装置冗余配置可靠性分析(续)

, PP. 93-99

Keywords: 冗余,可靠性,三取二,四取二,完全双重化

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Abstract:

基于可修复系统可靠性理论,结合高压直流输电保护系统的可靠性要求,根据马尔科夫原理运用频率时间法等方法,建立了典型冗余配置方式三取二、四取二的状态空间图,并求出其等效模型和可靠性指标,比较了三取二、四取二、完全双重化冗余配置方式的可靠性水平,结果表明,三取二和四取二可靠性比较接近,四取二略占优势;完全双重化是不完整的四取二,本质类似二取一,其可靠性不如三取二高。三取二的经济性最好,故综合考虑可靠性和经济性,最终认为三取二是直流输电系统保护冗余方式的较好选择。

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