电容式电压互感器二次反充电故障分析  

Analysis of Secondary Reverse Charging Faults in Capacitive Voltage Transformers

作　　者：梁光照 徐强超 王幸 李津 江文东 谭桂轩 段炼 林加隽 蒋文捷 LIANG Guangzhao;XU Qiangchao;WANG Xing;LI Jin;JIANG Wendong;TAN Guixuan;DUAN Lian;LIN Jiajun;JIANG Wenjie(Guangzhou Power Supply Bureau Substation Management Office No.1,Guangzhou 510000,China)

机构地区：[1]广州供电局变电管理一所,广东广州510000

出　　处：《电工技术》2024年第10期180-183,共4页Electric Engineering

摘　　要：倒母操作和电容式电压互感器(CVT)停电检修时可能发生二次电压并列,如果某个CVT一次失电就会造成带电CVT通过异常并列回路向失电CVT反向充电的故障。这会引发电压回路电流剧增、空开跳闸,造成电压尽失进而导致保护拒动或误动、全站失压等。深入分析了二次反充电故障原理,对某变电站CVT反充电故障进行Simulink建模仿真,仿真结果与计算值一致,并总结了预防故障发生的有效措施。There may occur in substations secondary voltage parallelism during switching operation and capacitive voltage transformer(CVT)outage maintenance.A primary power loss of a CVT will cause a live CVT to charge in the opposite direction through an abnormal parallel circuit to the power-losing CVT.This will cause a sharp increase in voltage circuit current and air switch trips,and further an extensive voltage loss,resulting in improper action or inaction of protections and voltage loss of the whole station.This paper provides an in-depth analysis of the principle of secondary reverse charging faults,and conducts Simulink modeling and simulation of CVT reverse charging faults in a certain substation whose result is consistent with calculated values.Moreover,effective measures to prevent this type of faults are summarized.

关 键 词：电容式电压互感器 电压并列 二次反充电 全站失压 

分 类 号：TM451.2[电气工程—电器]