500kV变电站监控系统改造防误闭锁处理分析

Handling of misoperation-preventive locking in supervisory control system reform of 500 kV substation

针对某变电站监控系统改造防误闭锁系统的情况,提出了防误闭锁系统在改造时期的要求、方案及技术要点。新监控系统防误闭锁有监控闭锁逻辑、微机五防闭锁、电气闭锁和同一机构内的接地刀闸机械闭锁4个部分。新监控系统的每个间隔都装有测控装置,负责对其间隔的断路器、刀闸和接地刀闸及其相关电流/电压进行控制和测量等功能。论述了改造期间原防误闭锁修复的闭锁条件、形式和方法。所提出的防误闭锁处理方案已经对变电站监控系统顺利完成了改造,效果良好。

The requirements,handling scheme and key techniques of misoperation-preventive locking system for the supervisory control system reform of a 500 kV substation are presented. The reformed misoperation -preventive locking system has the monitoring logic locking,microcomputer-based five-preventive locking, electrical locking and mechanical grounding switch locking. The measuring and control equipment is installed in each cell to control the supervised breakers,switches and grounding switches and measure the relative currents and voltages. The locking condition,form and means for the repair of damaged original locking are discussed. The handling scheme is implemented effectively.