微机母线保护运行中存在的几个问题分析及对策

The analysis and countermeasure of the several problem in the microcomputer-based busbar protection operation

母线保护对电网的安全稳定运行起着十分重要的作用,特别是现在电网中大量采用的微机母线保护,但经过长期运行,发现由于微机母差保护灵敏度高,受到外界的感应电流、母联开关位置辅助触点、母线刀闸切换触点及切换与保护电源共用一空开等问题的影响,造成微机母差保护正确动作率偏低,笔者在本文中将母线保护在运行中问题进行了分析总结,对存在问题进行反措并提出自己看法和观点。望对变电站工作人员处理同类微机母线保护问题作有一定的借鉴意义。

Busbar protection is very important to the safety and stabilization of the grid operation,especially at present microcomputer-based busbar protection is largely used in grid.But through chronically operate,it was found that microcomputer-based busbar protection has high sensitivity and low correct operation ratio because of the influence of faradism current,bus-tie circuit breaker position auxiliary contacts,busbar disconnect switch contacts and switch power supply.Author analyses the several problem in the...