高压开关柜继保装置电磁干扰案例分析

摘要

通过分析高压变电所内一次回路断口瞬变强电磁场的产生和传输途径，结合广州地铁某线33 kV GIS馈线微机保护测控单元受电磁干扰非正常重启故障案例，分析电磁干扰产生的原因，并逐项试验分析，最终提出了相对应的抗干扰解决方案。%In this paper, through the analysis of transient electromagnetic field generation and transmission caused by primary circuit breakpoint in the high voltage transformer substation, combined with the case which abnormal restart of microcomputer relay protection unit based on 33kV GIS feeder in subway of Guangzhou Metro because of EMI, analyzing and finding out the reason of EMI occurred, finally put forward the relative anti-interferences solutions.