开入防抖设置不当导致的备自投误动作分析  

Analysis of Misoperation of Backup Auto-Switching Caused by Improper Setting of Turn-in Anti-shake

作　　者：胡晓丽[1] 周丽芳[1] 沈珉哲 Hu Xiao-li;Zhou Li-fang;Shen Ming-zhe

机构地区：[1]江苏省电力公司生产技能培训中心,江苏苏州215004 [2]苏州市吴江区供电公司,江苏苏州215200

出　　处：《电力系统装备》2019年第7期119-120,共2页Electric Power System Equipment

摘　　要：主变低压侧母线故障,其后备保护动作切除故障母线。因未能有效闭锁低压侧自投,将分段开关合上,造成对故障母线的再次冲击,最终由10kV分段保护切除故障。通过现场分析,检查,试验,发现在“遥信设置”参数中的“遥信去抖时间”项中厂家默认设置不当从而导致备自投装置无法可靠收到低后备保护的闭锁信号而误合。The main transformer low-voltage side busbar fault, its backup protection action to remove the fault busbar. Because the low-voltage side self-switching is not effectively blocked, the sectional switch is closed, resulting in a second impact on the fault bus, and finally the fault is removed by 10 kV sectional protection. Through on-site analysis, inspection and test, it is found that the default setting of the“ remote signal de-jitter time” item in the“ remote signal setting” parameter is inappropriate, which results in the failure of the backup automatic switching device to reliably receive the lock-in signal of low backup protection.

关 键 词：备自投 分段保护 遥信去抖时间 

分 类 号：TM73[电气工程—电力系统及自动化]