“7.21”龙银II线保护误动原因分析及对策

"7.21" Analysis and measure of misoperation of long-yin Ⅱ transmission line protection

继电保护的选择性是其重要特性之一,正确掌握继电保护装置的特点并在整定计算中充分考虑装置的特点才能确保上下级保护的选择性,否则将可能发生误动事故。针对近期发生的一起保护误动作跳闸事件,通过检查分析,找出了误动的原因,提出了相关对策和反措。

Selectivity is one of the important characters of relay protection.It should be taken into account in the process of setting calculation to make sure the relay selectivity can be acted correctly without any disoperation there.This paper represents the strategy to prepare for the disoperation based on the result of the analysis of the recent accident.