计及保护动作与换相失败的逆变侧阀短路故障定位  

Inverter-side valve short circuit fault location considering protection action and commutation failure

作　　者：王力[1] 黄明伟 周仕豪 曾祥君[1] WANG Li;HUANG Mingwei;ZHOU Shihao;ZENG Xiangjun(School of Electrical and Information Engineering,Changsha University of Science&Technology,Changsha 410114,China;Electric Power Research Institute,State Grid Jiangxi Electric Power Co.,Ltd.,Nanchang 330096,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410114 [2]国网江西省电力有限公司电力科学研究院,江西南昌330096

出　　处：《电力自动化设备》2023年第8期133-140,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(52037001,52107071);国网江西省电力有限公司重大科技专项(52182020008J)。

摘　　要：鉴于现有阀短路故障定位方法依赖桥臂电流信息,而目前工程实际中存在桥臂电流不易获取、定位精度不高的问题,提出了一种无需桥臂电流的逆变侧阀短路故障定位方法。考虑控保系统对不同位置阀短路故障响应特性以及逆变侧阀短路故障引起的换相失败对故障特征的影响,分析了不同时刻发生逆变侧区内4种典型阀短路故障的故障特征。结合逆变侧保护动作情况和系统电气量特征,设计了不同位置阀短路故障识别判据,进而实现逆变侧换流器区不同位置阀短路故障定位。基于RTDS与实际控保系统的数模混合仿真验证了所提故障定位方法的有效性。In view of the problems that the existing valve short circuit fault location method relies on obtai-ning the bridge arm current information which is difficult to be obtained in the current engineering practice as well as has low fault location accuracy,a new inverter-side valve short circuit fault location method without bridge arm current is proposed.Considering the response characteristics of the control and protection system to the valve short circuit fault at different positions and the commutation failure influence caused by the inverter-side valve short circuit fault on the fault characteristics,the fault characteristics of four typical valve short circuit faults in the inverter-side area at different times are analyzed.Based on the protection action of the inverter side and the system electrical information,the identification criteria for valve short circuit faults at different positions are designed,then the location of valve short circuit fault at different positions in the inverter-side converter area is realized.The effectiveness of the proposed method is verified by the digital-analog hybrid simulation based on RTDS with the actual control and protection system.

关 键 词：高压直流输电 阀短路故障 故障定位 换相失败 RTDS数模混合仿真 

分 类 号：TM46[电气工程—电器]