一起非电量保护装置误动原因分析与改进
 

陈强林，张锋，刘晓航，冯佳奇
（许继电气股份有限公司，河南 许昌 461000）
 

    摘 要：分析了一起非电量保护装置误动事件，对故障现象、数据的分析过程进行了阐述，采用了软、硬件故障模拟方法，最终确定误动原因是由于装置CPU 插件RAM 内存中一位数据出错而引起保护逻辑变化，满足动作条件而误出口，并从增加闭锁相关保护功能、使用双CPU 配置、增加重要自检信息的事件记录等方面对类似故障发生时的闭锁及后续改进提供了方法。
    关键词：非电量保护；误动；翻转故障；软件闭锁
    中图分类号：TM77     文献标识码：B     文章编号：1007-3175(2017)04-0040-03
 

Cause Analysis and Improvement of a Case of Non-Electric Quantity Protection Device Misoperation

 

CHEN Qiang-lin, ZHANG Feng, LIU Xiao-hang, FENG Jia-qi
（XJ Electric Co., Ltd, Xuchang 461000, China）
 

    Abstract: This paper analyzed an incident of non-electric quantity protection device misoperation, expounded the analysis procedure of fault phenomenon and data, and adopted the software and hardware fault simulation method. The final determination misoperation cause was the protection logic changes caused by the data error in the plug-in random-access memory (RAM) of device central processing unit (CPU) to meet the movement condition and mis-export. This paper started from the incident records such as increasing the protection function related to interlock, using double CPU configuration, increasing important self-inspection information etc. to provide the methods for the atresia of similar failure and subsequent improvement.
    Key words: non-electric quantity protection; misoperation; reversal fault; software interlock
 

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