【摘要】 中性点经消弧线圈接地的电力系统中 ,单相接地故障发生的瞬间 ,系统中的暂态电流中包含了丰富的故障信息 ,通过小波分析提取暂态信息可用来进行选线。另一方面 ,实际的电力系统中存在有多种谐波 ,对系统稳态的谐波进行分析 ,可以提取故障特征 ,通过对单相接地故障的稳态和暂态进行分析 ,提出了基于信息融合技术的单相接地故障选线方法 ,最大限度地克服了系统的干扰 ,提高了选线准确率更多还原

【Abstract】 In power system with grounding coil, the transient current includes plenty of fault information when single phase earth fault occurs. The fault information is extracted from transient current using wavelet transforms for fault line selection in this paper. On the other hand, there are steady state harmonic currents when single phase earth fault occurs to a system.The steady state harmonic currents also characterize the fault. Based on the information fusion of both steady and transient state of the grounding fault system, a new single phase fault line selection method is proposed in this paper. It can overcome system’s disturbance in most extent and improve accuracy of the fault line selection.更多还原