基于7 SJ68微机综合保护测控装置的低压继电保护改造

摘要

This paper proposes relaying protection renovating solutions to the problems existed in PTA original LV incoming line relaying protection device. The control logic and control circuit are redesigned based on 7SJ68 in-tegrated protector. The renovating result has proved that the integrated protector works reliably, the function of switching and spare power automatic switching is realized,and the problems existed in original relaying protection device are solved.%本文针对PTA装置原低压进线继电保护装置存在的问题，提出了继电保护改造的方案，并基于西门子7SJ68微机综合保护测控装置对控制逻辑及控制回路进行重新设计。经改造验证，综合保护测控装置工作可靠，实现了不停电倒闸及备自投功能，解决了原继电保护装置存在的问题。