变电站微机保护通信故障及处理

Communication Faults and Solutions of Microcomputer-based Relaying in Substation

针对变电站综合自动化系统现场实际运行中微机保护装置与监控系统通信的常见故障:站控层网络通信中断、保护装置误发软报文、保护状态量采集故障、35kV断路器遥控成功率低进行了分析,提出了处理措施。总结归纳了故障发生的原因:设备老化和不同设备厂家的通信接口兼容性问题。主要介绍了变电站微机保护装置通信的故障解决方法,为正确处理综自系统的此类故障提供了借鉴。

The common faults of the communication between the monitoring system and microcomputer-based relaying device in substation integrated automation system are analysed,such as the network communication interruption of the substation monitor and control layer.The fault transmmited messages from protective relaying.The wrong data acquisition of digital quantities like conditions alarming of protective relaying,and the low success rate of remote controlling of 35kV breakers.The solutions are also presented.The causes of the above problems are summarized,including the ageing of equipment and the communication interface compatibility of the device from different manufacturers.This paper offers references for the mal- function diagnosis of communication system in substation.