摘要
研究了高压XLPE电缆故障行波测距方法,对于快速定位故障具有重要意义。将小波变换应用于行波测距的算法中去,由于其模极大值能够准确地反映初始行波的极性和到达时间,该方法利用初始电压行波和电流行波的极性方向来判断线路是否发生故障,它不受后续折反射波的影响,特征明确。利用EMTP软件对模型进行仿真,对仿真后的结果采用小波变换进行分析,能比较准确地判断线路是否发生故障。对珠海环琴线、望环线的电缆线路进行了模拟故障的行波测距实验。结果表明,采用小波算法有效提高了测距的精度。
Research on the traveling wave method for high voltage XLPE cable is of great significance to rapidly position the fault. In this paper, the wavelet transform algorithm is applied in the traveling wave method, because its modulus maximum can accurately reflect the initial traveling wave polarity and the arrival time. In this method, an initial voltage traveling wave polarity and electrical traveling waves are used to determine whether the line fault occurs, which is not influenced by the reflected wave of the follow-fold. The EMTP simulation result in the paper suggests that using wavelet transform can much more accurately determine whether the line is faulty. Meanwhile, the paper presents the simulated fault traveling wave experiments carried out in the in Zhuhai Huanqin Lines and Wanghuan Lines, and the results show that the wavelet algorithm can improve the precision.
出处
《电网与清洁能源》
北大核心
2015年第9期44-48 55,共6页
Power System and Clean Energy
关键词
XLPE电缆
行波测距
小波变换
XLPE cable
traveling wave method
wavelet transform algorithm
