基于VMD-GST的TEO的煤矿供电线路单相接地故障测距方法

Single-phase Grounding Fault Location Method of Coal Mine Power Supply Line Based on VMD-GST-TEO

煤矿井下供电线路工作环境恶劣,时常发生故障,且存在故障定位的难度大、研究较少等问题。据此提出了基于VMD-GST的TEO行波故障测距方法,用于煤矿井下输电线路故障定位。首先,提取故障信号,并经K=3层VMD分解,得到波动较大的IMF分量;然后再将选择的IMF分量经广义S变换得到S模矩阵,并采用Teager能量算子法标定波头;最后通过行波测距公式得出故障位置。结果表明,所提故障测距方法于单相接地故障而言,有较高的精度。

The working environment of underground power supply lines in coal mines is harsh,faults often occur,and there are problems such as difficulty in fault location and less research.Based on this,a TEO traveling wave fault location method based on VMD-GST was proposed,which was used for fault location of underground transmission lines in coal mines.First,extracted the fault signal and decomposed it by K=3 layers of VMD to obtain the IMF component with large fluctuations.Then the selected IMF components were generalized S-transformed to obtain the Smodulus matrix,and the Teager energy operator method was used to calibrate the wave head.Finally,the fault location was obtained by the traveling wave ranging formula.The results show that the proposed fault location method has higher accuracy for single-phase ground faults.