CAJ | 학술논문

数字化变电站过程层存在多种形式的网络结构，研究不同网络结构下继电保护系统的可靠性对过程层网络结构的选择和工程应用具有重要意义。根据数字化变电站继电保护系统的构成特点，提出了一种保护系统可靠性分析方法。该方法将保护系统划分为采样子系统和跳闸子系统，分别建立其故障树模型。综合考虑设备故障和修复过程，利用故障树和蒙特卡罗(Monte Carlo)仿真相结合的求解方法计算保护系统可靠性。最后应用所提出的分析方法，对不同网络结构下保护系统的可靠性进行了评估，通过对元件概率重要度分析，给出了影响保护系统可靠性的主要元件。
수자화변전참과정층존재다충형식적망락결구，연구불동망락결구하계전보호계통적가고성대과정층망락결구적선택화공정응용구유중요의의。근거수자화변전참계전보호계통적구성특점，제출료일충보호계통가고성분석방법。해방법장보호계통화분위채양자계통화도갑자계통，분별건립기고장수모형。종합고필설비고장화수복과정，이용고장수화몽특잡라(Monte Carlo)방진상결합적구해방법계산보호계통가고성。최후응용소제출적분석방법，대불동망락결구하보호계통적가고성진행료평고，통과대원건개솔중요도분석，급출료영향보호계통가고성적주요원건。
There are many forms of network structures in the process of digital substation layer. It is significant to research the process layer’s reliability under different network structures of relay protection system for the network structure selection of process layer and engineering application. Based on the digitized substation relay protection system structure characteristic, this paper puts forward a reliability analysis method for protection system. The protection system is divided into sampling subsystem and trip subsystem and their fault tree models are established respectively. The method comprehensively considers the equipment failure and repair process and makes use of the fault tree and Monte Carlo simulation to solve the reliability protection of system. Finally, the proposed method is used to evaluate the reliability of the protection system with different network structures. The main elements affecting the reliability of protection system are given by the analysis of the component probability importance. This work is supported by National Natural Science Foundation of China (No. 51177058 and No. 50837002).