基于小波变换的T型线路CT饱和检测新方法  

New Method of CT Sturation Detection in T-connection Transmission Lines Based on Wavelet Transform

作　　者：刘静[1] 邰能灵[1] 陈康铭[2] 袁成[2] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海市电力公司超高压输变电公司,上海200063

出　　处：《水电能源科学》2008年第2期171-174,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50577042)

摘　　要：针对T型线路电流差动保护判据中CT饱和的检测判据不足,通过对CT饱和原因及其影响的仿真和分析,提出了一种基于小波分析的T型线路电流互感器饱和的检测方法。大量的ATP仿真结果表明,该方法可准确判断T型线路中CT的饱和,有效提高了保护的可靠性。Aiming at the insufficiency of the detection of CT saturation in current differential protection criterion for T connection transmission lines, the paper proposed a new detection method based on wavelet transform by analyzing the cause and effect of CT saturation. ATP simulation results showed that the new method could accurately detect CT saturation, which could enhance the reliability of the criterion.

关 键 词：T型线路 小波变换 互感器饱和 电磁暂态仿真程序(ATP) 

分 类 号：TM773[电气工程—电力系统及自动化] TM452