基于WAMS的继电保护静态特性监视及其隐藏故障诊断  

Monitoring of Static Characteristics and Diagnosis of Hidden Failures in Protection System Based on WAMS

作　　者：熊小伏[1] 刘晓放[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆市400030

出　　处：《电力系统自动化》2009年第9期11-15,19,共6页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217908);国家自然科学基金资助项目(50777068)~~

摘　　要：继电保护系统的隐藏故障对电网的运行威胁很大,而隐藏故障的在线诊断十分困难。文中提出利用广域测量系统(WAMS)的测量计算值与继电保护装置的测量计算结果二者的差异,对继电保护装置静态特性进行实时监测,从而发现其隐藏故障,并建立了相应的判据。以输电线路光纤纵差保护为例,分析了隐藏故障判据门槛值的整定计算方法。Hidden failures in protection system are great threats to the operation of power grids, while there are almost no online diagnostic methods for hidden failures so far. To solve this problem, this paper proposes a＇new method for exploring the hidden failures in protection system. By comparing the calculated values from measurements of wide-area measurement system （WAMS） and from relay protection, this method realizes the real-time monitoring of static characteristics and diagnosis of hidden failures in protection system. The criterion for failure diagnosis is also developed. As an example, for an optical-fiber longitudinal differential protection of transmission lines, the setting method for hidden failure criterion＇s threshold is analyzed.

关 键 词：静态特性 隐藏故障 WAMS 状态监视 继电保护系统 

分 类 号：TM774[电气工程—电力系统及自动化] TM732