【摘要】 单相接地故障和铁磁谐振故障是小电流系统经常发生的故障。首先介绍了s注入法选线和测距的基本原理 ,然后提出了利用频率检测法和s注入法相结合辨别单相接地故障与铁磁谐振故障的方法 ,有效解决了接地信号发生时将铁磁谐振故障误认为接地故障进行处理的问题 ,由此提出了利用s注入法实现消谐和选线一体化的可行性方案更多还原

【Abstract】 Phase\|to\|ground fault and ferro\|resonance fault are common in small current system.In this paper ,signal injection method and its fault location principle are introduced first.Then the method to identify the phase\|to\|ground fault and ferro\|resonance fault by making use of frequency examination method and signal injection method is presented,by which the problem mistaking the phase\|to\|ground fault as the ferro\|resonance when phase\|to\|ground fault signal occurred is resolved according to which the scheme of integrating the fault selection and resonance elimination is put forward.更多还原