基于保护机理的隐性故障识别方法  

Identification Method for Hidden Failures Based on Protection Mechanism

作　　者：戴志辉[1] 方伟 李金铄 耿宏贤 寇博绰 DAI Zhihui;FANG Wei;LI Jinshuo;GENG Hongxian;KOU Bochuo(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;Urban District Power Supply Company,State Grid Beijing Electric Power Company,Beijing 100037,China)

机构地区：[1]华北电力大学电气与电子工程学院,保定071003 [2]国网北京市电力公司城区供电公司,北京100037

出　　处：《电力系统及其自动化学报》2021年第11期120-127,共8页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51877084);河北省自然科学基金资助项目(E2018502063)。

摘　　要：继电保护隐性故障严重影响电力系统的安全可靠运行,尤其是保护整定方面存在的隐患不易被发现,可能扩大停电范围甚至造成连锁故障。对此,提出一种继电保护系统隐性故障识别方法。首先,建立了系统拓扑中线路、元件、断路器的编码规则,并根据编码和断路器跳闸情况确定疑似故障区域。其次,根据保护启动、动作及断路器跳闸的相关性,结合各保护配合关系,建立了保护动作逻辑关系式。再次,基于实际情况与预期情况最大吻合原则建立目标函数,采用优化算法求解,并通过对比得到隐性故障位置。案例分析表明,所提方法能有效发现保护定值和保护配合等软件类隐性故障。The existence of hidden failures in relay protection seriously affects the safe and reliable operation of power system.In particular,the hidden failures in protection settings are not easy to detect,which may expand the power outage scope and even cause cascading failures.To solve this problem,an identification method for hidden failures in the relay protection system is proposed.First,the coding rules for lines,components and circuit breakers in the system topology are formulated,and the suspected failure area is determined according to the coding and the tripping of circuit breakers.Second,based on the correlation among protection pickup,protection action and circuit breaker trips,the logic relation of protection action is established combined with the coordination of various protections.Third,based on the principle of maximum coincidence between the actual and expected situations,an objective function is constructed,which is solved using optimization algorithms.Afterwards,the location of hidden failures is obtained through comparison.Finally,the results of a case study show that the proposed method can effectively locate the software-type hidden failures such as protection setting values and coordination.

关 键 词：隐性故障 保护信号 编码规则 疑似故障区域 逻辑关系式 

分 类 号：TM73[电气工程—电力系统及自动化]