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首页> 外文期刊>IEEE Transactions on Power Delivery >Identifying Single-Phase-to-Ground Fault Feeder in Neutral Noneffectively Grounded Distribution System Using Wavelet Transform
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Identifying Single-Phase-to-Ground Fault Feeder in Neutral Noneffectively Grounded Distribution System Using Wavelet Transform

机译：利用小波变换识别中性点接地故障的单相接地故障馈线

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摘要

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.
机译：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案。该方案使用零序电流行波来确定故障的馈线，并使用母线残余电压来确定由故障或开关操作引起的事件。零序电流传感器测量的当前行波使用小波多分辨率分析进行分解。提取小波变换的局部模最大值，以确定初始行波的时间。将当时所有馈线上的小波变换在幅度和极性上进行比较，以识别故障的馈线。馈线标识与网络中性点接地模式无关。利用电磁暂态程序（EMTP）生成的信号实施并验证了提出的方案。事实证明，该方案对于在正常情况下产生的瞬变（如馈线通电和断电以及电容器组切换）具有鲁棒性。

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