CAJ | 학술논문

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.
고압직류수전(high voltage DC transmission,HVDC)보호계통인위함유다개공유신호,기우전통적상태조합법계산가고성겁기복잡.문장장성공류(goal oriented,GO)법인입도직류보호계통적가고성평고중,이벌단로보호위례,건립료기GO모형.동시,통과결합도론중원점화회점적개념장GO도진행분해,사득함공유신호적상태루적개솔공식가직접용우다상태계통적가고성계산,감소료유우다개공유신호도치적교대적계산량.재차기출상,비교료궤충전형용여배치하정개보호계통적오동솔(거동솔)분별수측량장치화보호장치적오동솔(거동솔)변화적곡선,득출료직류보호계통적일사가고성규률.
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 due 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.