摘要
介绍了一起220k V线路电容式电压互感器(CVT)的故障情况,通过对该CVT进行解体检查和试验,建立了ATP-EMTP模型,根据试验数据和仿真分析认为阻尼电阻断线后二次负载突变导致CVT产生谐振过电压是故障的主要原因,最后提出了CVT电磁单元定期取油、增加在线监测系统谐波分析功能等防范类似故障的措施。
A fault condition of a 220 k V transmission line Capacitor Voltage Transformer（CVT） is introduced. Through disassembly check, experimental study and simulation based on ATP-EMTP software of the faulty CVT, the main fault cause that sudden load change in the secondary side after the disconnection of the damping resistor leads to resonance overvoltage is found. In the end, some suggestions are given to avoid similar failures such as taking and analyzing oil from the electromagnetic unit, adding harmonic analysis functionality in the On-line Monitoring system and so on.
出处
《电气技术》
2016年第4期87-91,114,共6页
Electrical Engineering
关键词
CVT
在线监测
铁磁谐振
ATP-EMTP
Capacitor Voltage Transformer（CVT）
on-line monitoring
ferromagnetic resonance
ATP-EMTP
