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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
Single-phase ground fault and ferroresonance fault is a small current system often occur fault. Firstly, the basic principle of s-injection method for line selection and ranging is introduced. Then, a method of using frequency detection and s injection method to identify single-phase ground fault and ferroresonance fault is proposed, which effectively solves the problem that when the ground signal is generated, Resonant fault mistaken for the ground fault to deal with the problem, which put forward the use of s injection method to achieve harmony and the alignment of the feasibility of the program