由于传统方法在长距离特高压输电线路接地故障定位中应用效果不佳,不仅定位结果相对误差较大,而且定位时间较长,无法达到预期的定位效果,因此提出基于EMD分解算法的长距离特高压输电线路接地故障定位.利用电压传感器采集输电线路电压信号,通过EMD分解算法对信号进行分解处理,提取信号时域特征,根据时域特征确定接地故障位置,以此实现基于EMD分解算法的长距离特高压输电线路接地故障定位.经实验证明,设计方法定位结果相对误差在 2 m 以内,定位用时在 1 s 以内,在长距离特高压输电线路接地故障定位方面具有良好的应用效果.
Grounding Fault Location of Long Distance UHV Transmission Lines Based on EMD Decomposition Algorithm
Traditional methods exhibit inferior performances in locating grounding faults on long-distance ultra-high voltage transmission lines,including large relative error of positioning results and large time consumption of positioning,and thus cannot achieve satisfactory positioning effect. Therefore,an EMD decomposition algorithm based location method of long-distance ultra-high voltage transmission line grounding faults is proposed.The method uses voltage sensors to collect voltage signals from transmission lines,uses EMD decomposition algorithm to decompose and process the signals,extracts time-domain features of the signals,and determines the location of grounding faults based on time-domain features,in order to locate grounding faults on long-distance ultra-high voltage transmission lines.The proposed method is proved capable of achieving relative error of fault location results within 2 m and location time consumption within 1 s,and thereby good application effect in locating grounding faults on long-distance ultra-high voltage transmission lines.
万方数据
维普
