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根据数字化变电站的结构与特征及数据和信息流等的技术特点,引入根本原因分析(RCA)法,构建了基于原因型鱼骨图的数字化变电站输变电设备故障诊断模型。根据所建立的故障诊断模型中的父节点、变压器/断路器/输电线路等子节点及子原因、根原因之间的逻辑关系,采用Dempster-Shafer(D-S)证据理论中的合成法则融合多种故障特征信息,对输变电设备进行了层次化和结构化的综合诊断。通过对实际系统所发生的故障案例测试表明,所提出的故障诊断模型能够处理保护和断路器拒动和误动及警报信息出现遗漏和错误等情况。
According to the structure and characteristics of digital substation and the technical characteristics of data and information flow, the root cause analysis (RCA) method is introduced to construct the fault diagnosis model of transmission and transformation equipment in digitized substations based on the induced fishbone diagram. According to the logical relationship between the root node, transformer / circuit breaker / transmission line sub-node and sub-reason and root cause in the established fault diagnosis model, the synthesis rule in Dempster-Shafer (DS) Fault characteristics of information, transmission and distribution equipment has been a hierarchical and structured comprehensive diagnosis. Through the actual case of the fault case tests show that the proposed fault diagnosis model can handle the protection and circuit breakers refused to move and maloperation and alarm information appear omissions and errors.