基于EMD的消弧线圈接地系统故障选线

摘要

This paper puts forward a single-phase fault line selection method based on EMD and relative energy with little current grounding system. Through the EMD space-time filtering, the transient component as the characteristic parameter in the fault lines zero sequence current will be extracted, then the line for the relative energy, and the energy for failure criterion will be found to detect the fault line. With energy as the failure criterion, a fault line can be detected. Matlab/Simulink simulation showed the effectiveness of the method and the algorithm is simole.%提出基于EMD和相对能量法相结合的消弧线圈接地系统故障选线方法．通过EMD时空滤波，在故障线路零序电流中提取暂态分量作为特征量，再求得各线路的相对能量，以能量为故障判据，从而检测出故障线路,经Matlab／simdlink仿真验证，结果表明该方法有效，且算法简便．