中国电机工程学报Issue(z1)：76-84,9.DOI:10.13334/j.0258-8013.pcsee.2014.S.011
基于广义变比辨识的继电保护电流测量回路故障诊断方法
Fault Diagnosis Method of Current Measurement Circuit in Protection Based on the Identification of Generalized Ratio
摘要
Abstract
The relay protection devices that based on the current principle are the most widely used in power system. For bus protection, substation-area protection and wide area protection, it is easy to cause protection false-operation or fail-operation when current measurement circuit is abnormal. The operations can result in regional blackout, which is the high-risk incident that power system should be vigorously prevented. Online monitoring measures are necessary to be taken to detect the own integrity of current measurement circuit to ensure correct operation of such protection. So this paper defined the current measurement circuit generalized ratio, and proposed a new way to monitor the fault or abnormity of current measurement circuit though the online identification of generalized ratio. The method established an identification matrix of generalized ratio according to Kirchhoff Current Law, and solved the generalized ratio by the singular value decomposition. Compared generalized ratio with standard ratio can timely discover the abnormity of current measurement circuit. Simulation analysis demonstrates the effectiveness of the proposed method.关键词
继电保护/广义变比/电流测量回路/故障诊断Key words
relay protection/generalized ratio/current measurement circuit/fault diagnosis分类
信息技术与安全科学引用本文复制引用
熊小伏,陈星田,曾星星,欧阳金鑫,陈涛,钟加勇..基于广义变比辨识的继电保护电流测量回路故障诊断方法[J].中国电机工程学报,2014,(z1):76-84,9.基金项目
国家863高技术基金项目(2011AA05A107)；重庆市科技攻关项目(cstc2012gg-yyjsB90003)。The National High Technology Research and Development of China 863 Program (2011AA05A107) （2011AA05A107）
Project Supported by the Key Project of Chongqing Science&Technology Commission (cstc2012gg-yyjsB90003) （cstc2012gg-yyjsB90003）
