一起750kV并联电抗器充电故障分析  

Analysis on Charge Fault of 750kV Shunt Reactor

作　　者：李山[1] 伊力扎提[1] 常宁宁[1] 

机构地区：[1]新疆电力科学研究院,新疆乌鲁木齐830011

出　　处：《电力电容器与无功补偿》2014年第3期83-87,共5页Power Capacitor & Reactive Power Compensation

摘　　要：某超高压变电站在调试过程中进行750 kV并联电抗器充电时,差动保护出口跳闸,通过对故障时的波形、数据、一次设备的安装和试验进行了分析,确定了保护动作原因为电抗器末端套管CT极性接反、7521断路器A相的防跳继电器型号错误。在此基础上,对发现缺陷及时进行处理,保证充电成功,确保后续调试项目顺利进行。通过此次故障分析,要正确测量CT的极性,防止因极性接错导致差动误动作尤其重要;对防跳继电器的安装和验收提出了更严格的要求。The differential protection outlet is tripped m the claargmg oI /3u Kv snunt reactor during commissioning of certain EHV substation. Through the analysis of waveform,data,installation and test of primary equipment,the reason for the action is due to reverse connection of casing CT polarity at the end of reactor and type mistake of anti-pumping reply of phase a for 7521 circuit breaker. Moreover,the defects found are treated timely so to assure successful charging and smoothness of subsequence commissioning items.Through polarity of CT and prevent differential action analysis of the fault it is important to measure correctly and mal-operation due to wrong connection of polarity; and more strict requirement to the installation and testing of anti-pumping relay is proposed.

关 键 词：并联电抗器 套管CT 极性 断路器 防跳继电器 

分 类 号：TM472[电气工程—电器]