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基于电容式电压互感器二次信号的行波故障定位方法 被引量:22

Travelling-Wave Fault Location Method Based on Secondary Signal of CVT
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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
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