GIS内PT铁磁谐振仿真计算与分析  

Simulation Calculation and Analysis of a Ferroersonance Case Caused by PT in GIS

作　　者：陈琳 刘娟 李爽 CHEN Lin;LIU Juan;LI Shuang(State Grid of Shaanxi Electrical Power Ltd.,Co.,Shaanxi Baoji 721004,China;State Grid of Liaoning Electrical Power Research Institute,Shenyang 110006,China)

机构地区：[1]国网陕西省电力公司宝鸡供电公司,陕西宝鸡721004 [2]国网辽宁省电力有限公司电力科学研究院,沈阳110006

出　　处：《高压电器》2019年第6期242-246,共5页High Voltage Apparatus

摘　　要：文中以某电厂发生的PT铁磁谐振为例,分析了谐振原因,对其可能存在铁磁谐振的工况进行了仿真计算,并提出了可行的消谐措施。研究表明:对于中性点不接地系统,PT应选用额定电压因数为"1.9倍、8 h";消弧线圈补偿度宜在-(5%~20%)之间。This paper takes the PT ferroresonance in a power plant as an example,analyses the reasons of resonance,simulates the possible working conditions of ferroresonance,and put forwards the feasible measures for harmonic elimination.The research shows that for neutral ungrounded system,PT should choose rated voltage factor of 1.9 timesand 8 hours,and the compensation degree of arc suppression coil should be between-(5%~20%).

关 键 词：GIS 电磁式电压互感器(PT) 铁磁谐振 分频 消谐措施 

分 类 号：TM451[电气工程—电器]