变电站保护系统故障及可靠性分析  

Fault and Reliability Analysis of Substation Protection System

作　　者：李旭东 周旖辉 Li Xudong;Zhou Yihui(Ultra High Voltage Company,State Grid Hubei Electric Power Co.,LTD.,Wuhan 430064,China)

机构地区：[1]国网湖北省电力有限公司超高压公司,武汉430064

出　　处：《黑龙江科学》2023年第18期122-124,共3页Heilongjiang Science

摘　　要：讨论了变电站保护系统的故障类型,根据变电站停电原因的统计数据,指出导致变电站故障的主要原因是保护系统中的继电器故障、断路器设备故障、人为因素及二次回路故障。利用故障树分析法对各原因的故障率进行可靠性分析,画出故障树,从而确定系统故障原因的各种可能组合方式及发生概率,以此计算系统的故障概率,提出使用主保护及备用保护,大大降低变电站故障率,使用不同厂家的主继电器及备用继电器,提高变电站保护系统的稳定性。The study discusses the fault types of transformer substation protection system,and finds out that the main causes of substation failure are relay failure in protection system,circuit breaker equipment failure,human factors and secondary circuit failure according to the statistical data of the causes of substation blackouts.Then the study conducts fault tree analysis method and the reliability analysis of the failure rate of each cause,draws the fault tree,determines the various possible combinations of the system failure causes and the probability of occurrence,calculates the failure probability of the system,and proposes the utilization of the main and standby protection to greatly reduce the substation failure rate.The main relay and standby relay of different manufacturers are used to improve the stability of substation protection system.

关 键 词：变电站保护系统 故障率 可靠性 

分 类 号：TM63[电气工程—电力系统及自动化] TM77