Research On Micro Grid Economic Dispatch Considering The Response Of Electric Vehicle Users

Global energy crisis and environmental pollution problem are increasing day to day worldwide and this fact made distributed power supply technology get much attention in most countries.Micro grid has effectively alleviated serious situation of global energy and environment as an effective way to solve problem of distributed power input network.Electric vehicles have shown rapid development in recent years as a green transport with zero emission.However,large-scale electric cars connected to micro grid will affect operational planning of micronetworks,so it is of great significance to study economic scheduling of electric vehicles connected to micronetworks.In this thesis,the driving characteristics of electric vehicle users were studied,and the model of electric vehicle disordered charging were established.Then,based on this model,considering the user's electricity consumption and satisfaction of electricity bill,the model of electric vehicles' orderly charging and discharging was established to consider the users' response to ordered charging and discharging strategy and example analysis was made to prove the model's accuracy and effectiveness.Secondly,the microgrid structure of electric vehicle was considered and mathematical models of distributed power supply such as wind turbine,photovoltaic,gas turbine and diesel engine were established respectively.Then,according to different charging models of electric vehicles and different operational modes of micro-network,four kinds of micro-network operational control strategies were proposed.Then,for optimization goal awareness of micro-grid economy and environmental protection,the economic scheduling model of microgrid was established considering a series of constraints of micro-network operation and improved particle swarm optimization algorithm was used to solve the problem.Finally,an example was given to analyze the established micro-network economic scheduling model and the scheduling results of power generation units and micro-network operating costs under different control strategies were compared and analyzed.Simulation results showed that the orderly charge and discharge of electric vehicles can reduce operating costs of micro-network and improve environmental benefits.