基于ER算法的智能变电站保护二次回路故障定位方法

由于智能变电站二次系统结构较于常规站发生变化，当发生二次回路通信故障时，难以确定具体故障原因及定位故障设备。文中提出一种基于证据推理（ER）算法的智能变电站保护二次回路故障定位方法，基于智能变电站配置文件，获取二次虚实回路图并完成虚实对应；然后，依据抓包技术收集站内告警信息，通过举证表的方法列出可疑元器件集合；最后，应用ER算法在可疑故障元器件集合中帮助确认故障设备，对智能变电站维护工作有着一定参考意义。

Fault Location Method for Secondary Circuit of Protection Systems in Smart Substation Based on ER Algorithm

Because the secondary system structure of smart substation is changed compared with that of conventional substation, it is difficult to determine the specific fault cause and locate the fault equipment in case of secondary circuit communication fault. A fault location method for secondary circuit of protection systems in smart substation based on evidential reasoning(ER) algorithm is proposed. Based on the configuration file of smart substation, the diagram of secondary logical circuit and physical circuit is obtained, and the mapping between logical circuit and physical circuit is completed. Then, the alarm information in the substation is collected according to packet capture technology, and the set of suspicious components is listed by the method of proof table. Finally, ER algorithm is applied to confirm the faulty equipment in the set of suspicious faulty components, which has a reference significance for substation maintenance.