基于扩展GO法的HVDC保护系统可靠性评估  

Reliability Assessment of Protections for HVDC Transmission System Based on Extended Goal-Oriented Method

作　　者：梅念[1] 陈东[1] 马为民[1] 石岩[1] 

机构地区：[1]国网北京经济技术研究院,北京市西城区100052

出　　处：《电网技术》2013年第4期1069-1073,共5页Power System Technology

基　　金：国家电网公司重大科技项目(800 kV换流站深化研究)

摘　　要：高压直流输电(high voltage DC transmission,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(goal oriented,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。Multi signals shared by protections for HVDC transmission system make the reliability computation based on traditional state combination method extremely complicated. In this paper the goal-oriented （GO） method is led into the reliability assessment of protections for HVDC transmission system, and taking the valve short-circuit protection for example the GO model of valve short-circuit protection is built. Meanwhile, based on the concepts of source point and sink point in graph theory, the GO graph is decomposed, thus the state cumulative probability formula containing sharing signals can be applied to reliability computation of multi-state system directly, and the heavier calculation burden ~tue to multi sharing signals can be reduced. On this basis, the curves of misoperation rate and maloperation rate of the whole protection system under several typical redundant configurations vary with the misoperation rate and maloperation rate of the measuring devices and protection devices are compared, and some laws related to the reliability of protection system for HVDC transmission system are obtained.

关 键 词：高压直流输电 保护系统 可靠性评估 冗余配置 

分 类 号：TM721[电气工程—电力系统及自动化]