基于OOCPN结线分析和反向推理的城市轨道交通牵引供电系统故障诊断方法

Fault Diagnosis Method for the Traction Power Supply System of Urban Rail Transit Based on OOCPN Topology Analysis and Backward Reasoning

基于面向对象的思想和有色Petri网理论,构建库所的令牌,描述城市轨道交通牵引供电系统中组成结点的元件、开关及结点的含源性质,进而建立城市轨道交通牵引供电系统结线分析的OOCPN(Object-Ori-ented Colored Petri-Nets)模型。求解该模型可确定城市轨道交通牵引供电系统的故障域;然后结合专家经验以及牵引变电所综合自动化系统轮询到的保护动作信息,通过反向推理遍历搜索该故障域,对故障元件进行定位;根据专家推理规则以及城市轨道交通牵引变电所内的保护配合关系,判断开关的拒动行为。以城市轨道交通牵引供电系统馈线短路且馈线开关拒动为例进行验证,结果表明:提出的城市轨道交通牵引供电系统故障诊断方法能够实现对故障元件的准确定位和开关拒动行为的判断。

Based on object-oriented idea and colored Petri-Net theory,the tokens of places were constructed to describe the components,switches for constituting the nodes in the traction power supply systems of urban rail transit as well as the source properties of nodes,and then establish the topology analysis OOCPN(Object-Oriented Colored Petri-Nets) model for the traction power supply system of urban rail transit.With the proposed model,the fault field of traction power supply system could be determined.Then,combined with expert experience and the information of protection actions polled by the integrated automation system of traction substation,ergodic search was carried through for this fault field by backward reasoning to locate the fault component.Switch malfunctions were judged and analyzed based on expert reasoning rules and the protection coordination relationship in the traction substation of urban rail transit.The short circuit fault of feeder and the malfunction of feeder switch in traction power supply system of urban rail transit were taken for examples to conduct validation.Results show that the proposed fault diagnosis method can realize the accurate location of fault component and the judgment of switch malfunction.