一起继电保护装置数据异常故障分析与对策

Analysis and Countermeasure for Data Abnormal Fault of Protective Relay

本文针对某次继电保护装置告警"内存错误"并伴随差动保护元件动作报文的故障进行分析,详细介绍了动作情况、现场检查和缺陷排查过程,查明故障原因是Hdlc编码芯片运行一段时间后发生引脚接触不良,导致与CPU总线相连的器件通信异常,影响各器件的稳定运行。本文结合故障案例,分析继电保护装置内部器件结构,提出了在装置状态检修工作中应对装置内部器件及其之间通信状况开展监视、对Flash芯片寿命进行评估等建议。

This paper faced to a fault of protective relay that device alarmed ＂flash error＂ with sent the message of differential protection element action. The details of the process of action, inspection and defect diagnosis were introduced. The cause of fault was that the poor contact of Hdlc chip leaded to disorder of CPU bus and maked every chip contacting to the bus operate unstably. According to the fault, the detail of structure of protective relay was analyzed, propound that the status and communication of chips should be monitored and the operation life of Flash should be evaluated.