Research On Optimal Scheduling Of Multi-source Microgrid Considering Electric Vehicles

In recent years,the development of industry consumes a lot of non-renewable energy.In the context of the continuous decline in the environmental comfort index and the increasing awareness of environmental protection,the problems caused by the centralized power supply system with simple structure in the past have become increasingly obvious.Compared with traditional fuel locomotives fueled by petroleum and its derivatives,electric vehicles,as a green and environmentally friendly means of transportation,have attracted the attention of governments,energy manufacturers,and automobile manufacturers.With the large-scale use of electric vehicles,the impact of electric vehicles loads on the large power grid loads cannot be ignored.It is very necessary to conduct reasonable mathematical modeling of the charging and discharging process of electric vehicles and to conduct reasonable planning of the operation of electric vehicles.In this context,it is of great significance to study the charging and discharging behavior of electric vehicles and their influence on the optimization of micro-grid operation.This article focuses on the analysis of the charging and discharging behavior of electric vehicles and the study of the economic operation of the micro-grid.The main works are as follows:Firstly,it introduced the domestic and foreign micro-grid related theories in detail,and summarized the impact of electric vehicles access to the micro-grid,and then came to the conclusion that the importance of modeling electric vehicle and theoretical research related to their access to the power grid.Secondly,based on the analysis of the working principle of common distributed power sources in the micro-grid and building a corresponding mathematical model,and influencing factors of the charging and discharging behavior of electric vehicles,the behavior of disorderly charging and orderly charging and discharging of large-scale electric vehicles is modeled mathematically by the Monte Carlo probability sampling.The experimental results show that the disorderly charging of electric vehicles will make it more difficult to operate the grid,while orderly charging and discharging can better solve the "peak-to-peak" caused by disordered charging and relieve the pressure of power grid operation.Thirdly,based on the analysis of the charging and discharging behavior characteristics of electric vehicles,a multi-objective optimization model with the lowest operating cost,the lowest environmental penalty cost and the lowest load fluctuation cost was established aiming at the economic performance,environmental protection and stability of micro-grid operation.For the multi-objective optimization model,the weights of each optimization objective are determined using the rationality and science of the second-order hierarchical analysis method,and the solving process is simplified using the exponential penalty function method.Finally,an improved Beetle Antenna Search algorithm is proposed,which combines the good search characteristics of both the Beetle Antenna Search(BAS)algorithm and the Particle Swarm Optimization(PSO),and the model is solved using this algorithm,and the experimental results show that the incorporation of orderly charging and discharging of electric vehicles helps to reduce the operating costs of the microgrid compared to disorderly charging,and also verified the rationality of the model.