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首页> 外文会议>2013 48th International Universities' Power Engineering Conference >Single-ended fault location method based on wavelet theory: Application to a double-circuit transmission line
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Single-ended fault location method based on wavelet theory: Application to a double-circuit transmission line

机译：基于小波理论的单端故障定位方法：在双回输电线路中的应用

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Within the Wavelet Transform (WT), time and frequency information can be measured simultaneously. This eases the detection of high-frequency transients generated by faults on transmission lines. This paper presents a new single-ended fault location method using WT to capture the fault generated transients and to locate the fault point. The proposed method uses the difference of travelling wave arrival times at one terminal to locate the fault point accurately. The transients reflected from another terminal and the fault point could be distinguished with the adoption of the discrete wavelet transform (DWT) on travelling waves. In order to develop the method based on the wavelet theory, a single line to ground fault is simulated on a 400 kV transmission line model using ATP/EMTP, and the so computed terminal signals are further analysed in Matlab. The impact of transformers and substations on the accuracy of this method is also discussed in this paper.
机译：在小波变换（WT）中，可以同时测量时间和频率信息。这简化了由传输线上的故障产生的高频瞬变的检测。本文提出了一种新的使用WT的单端故障定位方法，以捕获故障产生的瞬变并定位故障点。所提出的方法利用行波到达终端的时间差来精确定位故障点。可以通过在行波上采用离散小波变换（DWT）来区分从另一个终端和故障点反射的瞬变。为了发展基于小波理论的方法，使用ATP / EMTP在400 kV输电线路模型上模拟单线接地故障，并在Matlab中进一步分析如此计算出的终端信号。本文还讨论了变压器和变电站对这种方法的准确性的影响。

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