摘要
根据行波定位的技术特点,建立了电容式电压互感器 (Capacitor Voltage Transformer,CVT)高频暂态仿真模型, 分析了CVT行波信号的传变特性,论证了利用CVT二次信号进行故障定位的可行性,在此基础上提出了利用小波分析进行行波波头检测的实现方法。仿真结果表明,利用CVT 二次信号,通过小波变换方法可准确识别电压行波波头,实现高精度的故障定位。
According to the technical features of travelling-wave fault location, a high frequency transient simulation model of capacitor voltage transformer (CVT) is built up and its transmitting-transforming characteristics of travelling wave are analyzed. The feasibility of fault location by use of the secondary signal of CVT is demonstrated; on this basis a method to detect the wavefront of travelling wave by wavelet analysis is proposed. Simulation results show that by use of the proposed method the wavefront of voltage travelling wave can be accurately distinguished, thereby accurate fault location can be realized.
出处
《电网技术》
EI
CSCD
北大核心
2006年第5期101-105,共5页
Power System Technology
关键词
电容式电压互感器
故障定位
高频振荡
小波变换
行波
电力系统
Capacitor voltage transformer(CVT)
Fault location
High-frequency resonance
Wavelet transform
Travelling wave
Power system