Research On Automatic Layout Of Single-line Diagrams Of Distribution Network Feeders

With the continuous development of social economy and technology,the national economy has a sharp increase in demand for electricity,and is also imposes higher demands on the planning,operation and management of electric networks.In recent years,the construction of Chinese distribution network is changing with each passing day,the structure is more complex,and the operation conditions are changing.A single-line diagram is a representation of the topology connection between the application node and simple lines.The single-line diagram of the distribution network can visualize the equipment status of the distribution network.The staff manages,analyzes,and monitors the electric power system through a single-line diagram.Technological innovation promotes distribution management to become more automated.Engineering practice not only requires better layout results,rapid mapping has also become a research hotspot,and the numerous nodes and complex connection relationships of distribution networks make manual drawing increasingly impossible,and the time also can't be guaranteed.How to apply the relevant models of grid equipment management to achieve rapid and automatic mapping technology and gain continuous attention.Therefore,it is of great significance to realize the automatic layout of single-line diagrams of feeders in distribution networks through the device model and its topology connection relationship.Firstly,as an important basis for the management and decision-making of the dispatching and operating personnel,the distribution network often displays the topology connection relationships between the electrical network equipment structures in the form of single-line diagrams.This section analyzes the research background and the research status at home and abroad,and puts forward the relevant theoretical basis.It points out that it is of great significance to realize the automatic layout of single-line diagrams of distribution network based on the equipment model and topology connection relationship.Secondly,the improved tension-repulsion algorithm is used to realize the automatic layout of nodes without geographical coordinate information in the distribution network model.Aiming at the time problem of automatic layout and mapping,the method of using graph block is proposed to reduce the dimension of layout,and the connection between blocks is ensured through the addition of virtual nodes;and the problem of line overlapping and overlapping in the automatic layout is proposed based on the tension-repulsion force physics physical model,with improving the quality of nodes and achieve layout through reasonable setting of parameters.The simulation results show that the layout of the single-line diagram of the feeder is clear,the connection is more uniform,and the solution time is short,which can meet the demand of the grid company to generate the single-line diagram of the feeder in real time.Finally,considering the automatic layout of feeders' single-line diagrams with nodes having geographic coordinate information.This section further optimizes the improved tension-repulsion algorithm that has been completed,finds the main trunk according to the layout of geographical information,and proposes that the natural length is adaptive through the connection between nodes,and the direction of node movement is limited through the parent-child node relationship,so the automatic distribution of the single-line diagram of the distribution network,which consideration of geographic coordinates information is completed.The experimental results show that the single-line diagram of the distribution network feeders regenerated in the process of graph scaling is clear and the length of the line is uniform,which is in line with the habit of user observation.