Reconfiguration Of Distribution Network With Distributed Power Supply And Electric Vehicle

With the increasing shortage of traditional fossil energy,the development and application of new energy has been widely studied in recent years.Distributed power generation based on new energy is widely connected to distribution network.At the same time,the emission pollution caused by traditional automobiles has become increasingly prominent,and new energy vehicles,especially electric vehicles,have been widely promoted.Distributed power generation and electric vehicle access to the distribution network,but also to the grid has brought greater impact.Based on the model analysis of distributed generation and electric vehicle,this paper studies the application of network reconfiguration.Firstly,the background and significance of the research are elaborated,and the research status of distribution network reconfiguration,optimal operation of distribution network with electric vehicles,and distribution network reconfiguration with distributed generators and electric vehicles are introduced.Secondly,the different classifications of distributed power supply are introduced,and the power flow calculation models of different interface types of distributed power supply are analyzed,and the charging mode and calculation model of electric vehicle are analyzed.In order to simplify the calculation,the distributed generation can be treated as PQ nodes.At the same time,the impact of different access locations and capacities of the distributed generation on the system is quite different,so optimization analysis should be carried out in practical application.Thirdly,the basic principle,main components and flow chart of genetic algorithm are introduced.Aiming at the shortcomings and shortcomings of genetic algorithm,an improved immune genetic algorithm is proposed.A reconstructed mathematical model based on the minimum network loss is established.The decimal encoding based on loop and the analysis and treatment of infeasible solutions based on loop correlation matrix are adopted.Finally,the mathematical models of distribution network reconfiguration including distributed generation and electric vehicle are established,the basic models of one-way disordered charging and two-way ordered charging are analyzed,the power expectation expression of charging station is obtained,the method of daily comprehensive load acquisition is given,and the research of distribution network reconfiguration including distributed generation and electric vehicle is carried out according to the analysis and distribution of practical examples.The results show that thecharging station of EV can play a good role in peak shaving and valley filling of the system,and the analysis of integrated optimal control of distributed generation and EV can closely integrate the demand of load nodes to achieve better economic operation results of the system.