工频磁场对继电保护装置模拟信号影响分析

05Analysis of Influence of Power Frequency Magnetic Field on Simulated Signals of Relay Protection Device

文章针对工频磁场抗扰度试验对继电保护装置模拟信号干扰问题,阐述了工频磁场的试验方法,通过仿真分析了干扰磁场作用于模拟信号回路的骚扰机理,提出了一种模拟信号抗干扰的改进措施,并通过试验验证了该措施对改进模拟信号采集回路抗磁场类干扰的有效性。

The article focuses on the interference problem of simulated signals in relay protection devices caused by power frequency magneticfield immunity tests.The testing method of power frequency magneticfield is explained,and the interference mechanism of interference magneticfield on simulated signal circuit is analyzed through simulation.An improvement measure for simulated signal anti-interference is proposed,and the effectiveness of this measure in improving the anti magneticfield interference of simulated signal acquisition circuit is verified through experiments.