快速后备保护研究

电力系统继电保护中后备保护按阶梯形配置整定，必然带来主干电网和发电厂后备保护动作时间太长、影响电网安全的问题。提出建立一种新的快速后备保护系统的思想，描述了变电站快速后备保护系统的结构和运行原理，建立了动作逻辑方程式。采用文中所述方法，变电站后备保护动作时间将小于1s，从而可大大缩短整个电网的后备保护动作时间。

RESEARCH ON FAST OPERATING BACKUP PROTECTION

Setting backup protection according to step principle will always lead to long fault clearing time of relays in backbone network as well as power plants, and further a threat against security of power network. This article presents a new idea of fast operating backup protection system. Basic structure and operation principle of this fast backup relay system in a substation are described, and then logical operation equations are established. Using this method, the backup relay in substations will operate within 1 s, and thus largely reduce the fault clearing time of backup relays of the whole network.