同塔四回线电流差动保护的电容电流补偿分析  

Analysis of Capacitance Current Compensation of Current Differential Protection on Four-parallel Lines

作　　者：张琦兵[1] 邰能灵[1] 袁成 陈康铭 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市200240 [2]上海市超高压输变电公司运行西部,上海市200063

出　　处：《电力系统自动化》2010年第1期46-50,共5页Automation of Electric Power Systems

基　　金：教育部新世纪优秀人才计划资助项目(NCET-08-0356);上海市曙光计划资助项目(07SG11)~~

摘　　要：电流差动保护应用于超高压输电线时主要受线路分布电容电流的影响。同塔四回线由于线路回数多,分布电容的加大导致电容电流对差动保护的影响更为复杂。基于线路的π形等效模型,结合四回线母线的连接形式,利用六序分量法对同塔四回线电容电流补偿式进行解耦,提出适合于同塔四回线的时域电容电流补偿方案,最后利用PSCAD/EMTDC建立同塔四回线模型。仿真结果表明,此电容电流补偿方案能有效提高电流差动保护的性能。The application of current differential protection on EHV transmission lines is mainly affected by the distributed capacitance current. Such an effect is even more significant in four-parallel lines due to the increased number of circuits and increased amount of mutual distributed capacitance. Based on the n model of transmission lines, this paper proposes to decouple the four-parallel lines capacitance current compensation formula by utilizing the six-sequence component method and presents a time domain solution to compensate the capacitance current on four-parallel lines. Simulation result by PSCAD/EMTDC shows that this new capacitance current compensation scheme can effectively enhance the performance of current differential protection.

关 键 词：电流差动保护 同塔四回线 电容电流补偿 六序分量法 

分 类 号：TM773[电气工程—电力系统及自动化]