优化过流继电器与距离继电器协调组合最佳距离

Optimize the Coordination and Combination of Overcurrent Relay and Distance Relay

由于过流继电器运行速度慢,因此采用距离继电器作为分输电系统的主要保护装置,采用过流继电器作为分输电系统主距离保护的后备保护,即过流继电器为距离继电器的区域-2运行提供后备保护。本研究采用差分进化算法和混合变异技术算法对过流继电器的距离进行了优化协调,并对备用过流继电器的时间刻度盘设置(TDS)、插头设置(PS)以及区域-2设置与临界点过流继电器后备运行之间的协调时间间隔(CTI)进行了优化。将优化结果与遗传算法的优化结果进行比较,结果表明,差分进化不会产生失调,也不会违反协调时间裕度。

The slow running speed of the overcurrent relay forces the use of the distance relay as the main protection device of the sub-transmission system.The overcurrent relay is used as backup protection of main distance protection in the sub-transmission system.The overcurrent relay provides backup protection for the zone-2 operation of the distance relay.The differential evolution algorithm and hybrid mutation algorithm are used to optimize and coordinate the distance of the overcurrent relay.The time dial setting(TDS)and plug setting(PS)of the standby overcurrent relay were optimized.The coordination time interval(CTI)between the zone-2 setting and the backup operation of the critical point overcurrent relay is optimized,and the optimization results are compared with those of the genetic algorithm.It can be seen that differential evolution does not produce dissonance and does not violate the coordination time margin.