Research On Visualization Scheme Of Secondary Circuit Information In Intelligent Traction Substation

As is well known,the intelligent traction substation is an important node in traction power supply system,with a higher requirement for its safe and stable operation.However,the secondary circuit has not achieved the topology and state visualization in the monitoring system of intelligent traction substation,which results in difficulties in the troubleshooting of secondary system by operation and maintenance personnel.Moreover,the alarm information is displayed still in a chronological order,as well as when a fault occurs,a large number of alarm informations of primary and secondary systems emerge in a short time.Based on the fault location algorithm of alarm information,this paper studies the visualization scheme and implementation of alarm information of the secondary circuit in combination with the innovation of secondary circuit and visualization way of alarm information,so as to improve the visualization efficiency and intelligent level of alarm information of the secondary circuit.The main contents are as follows.(1)The fault location algorithm of secondary system based on tensor operation is proposed.Firstly,the structure and information flow of secondary circuit of intelligent traction substation are analyzed,and the flow of each switch port is calculated.Secondly,until now,there are few studies on the integrated modeling methods of physical topology of secondary circuit.Thus,according to the complex connection way of secondary circuit as well as the coexistence of virtual circuit and real circuit,this study puts forward a secondary circuit modeling method based on three-dimensional tensor.The three-dimensional tensor is used to extend the feature dimensions of the model,thus accomplishing the integrated modeling of physical topology of secondary circuit.The physical topology model is updated by the realtime alarm information to form the state monitoring tensor of secondary circuit.Because different faults correspond to different characteristics,a fault location algorithm of the secondary system based on tensor operation is proposed,as well as the fault location flow is presented.It is suggested by the case that the fault location algorithm has an ability to locate the faults under multiple faults,as well as the calculation logic is simple and clear.(2)The improved fuzzy Petri net is applied to fault location algorithm of primary system based on alarm information.Firstly,due to many modeling nodes of fuzzy Petri net and remodeling for different topologies,an improved fuzzy Petri net is proposed,and the traditional library represents the composite state instead of the single state.On the basis of the improved fuzzy Petri net,the fault location model of primary system of intelligent traction substation is established.The coordination logic of protection and circuit breaker are implicitly contained in the composite state of the library to achieve the integrated modeling of primary system.The comparison results between the case and the existing algorithm,this fault location model of the primary system has less model nodes,and without modeling again for different topologies of primary system.(3)The visualization way of secondary circuit with the combination of virtual and real circuits is adopted,which is performed by programming.The device is taken as the center to display the physical circuit topology,logical circuit topology,and their mapping relationship.In the visual interface,the real-time state of secondary circuit is presented,as well as the different colors are used to denote the normal device,alarm device,and fault location device.(4)The display of alarm information based on fault location is optimized,implemented by programming.Owing to device fault,a large number of alarm information emerges.At this time,an alarm information is displayed to describe the fault location,and all the other alarm information is folded under the fault location.The folding can prevent a large number of alarm information from flooding the screen.Moreover,the fault location can indicates the fault scope for the operation and maintenance personnel,enabling them to check the specific alarm information.