电流互感器配置对交流滤波器差动保护的影响  

Influence of Current Transformer Configuration on AC Filter Differential Protection

作　　者：苑双 殷丕盛 吴布托 YUAN Shuang;YIN Pisheng;WU Butuo(State Grid Shandong Electric Power Maintenance Company,Jinan 250118,China)

机构地区：[1]国网山东省电力公司检修公司

出　　处：《山东电力技术》2019年第6期77-80,共4页Shandong Electric Power

摘　　要：直流换流站中,交流滤波器保护根据不同位置电流互感器(TA)的采量,构成功能不同的保护,TA线圈的类型不同,采量精度就不同,则会影响保护动作的可靠性。介绍广固换流站1000kV交流滤波器小组差动保护和首尾端光学电流互感器(光学TA)的配置,结合交流滤波器充电时小组差动保护误动作事件,重点分析首尾端光学TA暂态特性不一致对小组差动保护动作可靠性的影响,最后给出了首尾端光学TA配置的处理方案,为今后直流工程交流滤波器TA设计配置提供参考。In DC converter station,AC filter protection constitutes protection with different functions according to the sampled data of current transducers (TA) at different positions.The acquisition accuracy varies with the type of TA coil,which will affect the reliability of protection action.The configuration of the group differential protection and the head-tail optical TA on 1 000 kV AC filter in the Guanggu converter station are introduced.Based on a group differential protection malfunction event during the AC filter charging,the influence of the inconsistency of the first and the last optical TA transient characteristics on the reliability of the group differential protection action is analyzed.The processing configuration scheme of the first and the last optical TA is given,which provides a reference for the TA design and configuration of AC filter in DC engineering for the future.

关 键 词：换流站 交流滤波器 小组差动保护 光学TA 暂态特性 

分 类 号：TM771[电气工程—电力系统及自动化]