Identifying Single-Phase-to-Ground Fault Feeder in Neutral Noneffectively Grounded Distribution System Using Wavelet Transform
Identifying Single-Phase-to-Ground Fault Feeder in Neutral Noneffectively Grounded Distribution System Using Wavelet Transform
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DOI：
10.1109/tpwrd.2008.917924
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发表时间：
2008-07
影响因子：
4.4
通讯作者：
Xinzhou Dong;Shenxing Shi
中科院分区：
文献类型：
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作者：
Xinzhou Dong;Shenxing Shi
提出了一种基于小波变换的配电网单相接地故障馈线识别方法。该方案使用零序电流行波来识别故障馈线，使用母线残余电压来确定故障或开关操作引起的事件。采用小波多分辨率分析方法对零序电流传感器测量的电流行波进行了分解。提取小波变换的局部模极大值来确定初始行波的时间。同时对各馈线的小波变换进行幅度和极性比较，识别出故障馈线。馈线识别与网络中性点接地方式无关。利用电磁瞬变程序（EMTP）生成的信号对该方案进行了实现和验证。结果表明，该方案对馈线上电、下电以及电容器组切换等正常事件中产生的暂态具有较强的鲁棒性。
A scheme of single-phase-to-ground fault feeder identification in distribution networks with the application of a wavelet transform technique is presented in this paper. The scheme uses zero-sequence current traveling waves to identify the faulted feeder, and the busbar residual voltage to determine an event caused by fault or switch operation. The current traveling waves measured by zero-sequence current transducers are decomposed using wavelet multiresolution analysis. The local modulus maxima of the wavelet transform are extracted to determine the time of the initial traveling wave. The wavelet transforms on all feeders at the time are compared in magnitude and polarity with each other to identify the faulted feeder. The feeder identification is independent of the network neutral-point grounding mode. The proposed scheme was implemented and verified using Electromagnetic Transients Program (EMTP)-generated signals. The scheme proved to be robust against transients generated during normal events, such as feeder energizing and de-energizing as well as capacitor bank switching.