摘要
介绍了一起220 kV微机母差保护误动作事故的检查处理过程,从电流互感器两点接地,感应电压干扰及装置逻辑缺陷3个方面分析了引起微机母差保护误动的原因,给出了防止微机母差保护误动的防范措施及对策。通过采取有针对性的措施,大大提高了该型母差保护装置的可靠性,保证了电网的安全稳定运行。
Abstract： The inspection process of the misoperation of a 220 kV microprocessor-based busbar protection introduced. It then analyses the misoperation reasons of the busbar differential protection from three aspects,including TA two-point grounding, induction voltage interference,device logical flaws,and sums up the preventive measures and countermeasures of busbar differential protection misoperation finally.This type of protection device reliability is greatly improved through taking targeted measures and thus the safe and stable operation of the grid is ensured.
出处
《电子设计工程》
2013年第8期51-52,57,共3页
Electronic Design Engineering
关键词
TA两点接地
感应电压
后备保护
选择性
Key words： TA two-point grounding
induction voltage
backup protection
selective
