考虑频率特性的高压电缆在线故障测距研究

Research of On-Line Fault Location for HV Power Cable Considering Frequency Characteristic

摘要: 对电力电缆发生故障时产生的行波在传输过程中的色散规律进行了研究，对各模量的传播模式进行了分析，采用小波变换方法提取故障行波波头信息，探讨了依频波速的选取，并以ATP仿真软件建立110 kV交联聚乙烯绝缘电缆模型，验证了双端在线故障测距算法的准确性。

Abstract: This paper analyses the dispersion rules of traveling wave produced by a short circuit fault in propagation process in a power cable and the propagation modes of every modulus, wavelet transform is used to extract traveling wave front information, and frequency-dependent wave velocity is chosen for fault lo- cation, finally a model of 110 kV XLPE cable is built by simulation tool ATP, and the accuracy of double terminal on-line fault location method is verified.