Research On The Operation Mechanism Of Electric Vehicle Sharing Position In Multi-Node Microgrid

Due to the improvement of people’s living standards and the pursuit of sustainable development,electric vehicles with low emissions,low noise,high energy efficiency and intelligence have been promoted and popularized.With the rapid development of the electric vehicle industry,the problems of shortage of parking spaces and insufficient charging facilities in cities have become more prominent,and the large-scale charging of electric vehicles affects the safe and stable operation of the power grid.This paper focuses on the matching problem of shared private parking spaces and electric vehicles in the multi-node microgrid and the parking and charging problems of electric vehicles,and proposes an operation framework for electric vehicle shared parking spaces in a multi-node microgrid environment.Carry on modeling and analysis,and propose an improved Lagrangian multiplier method to solve the model.The main contents of this article are as follows:First,a framework for the operation of shared parking spaces and electric vehicles in a multi-node microgrid environment is proposed.In this framework,the parking lot acts as an intermediary between the microgrid and electric vehicles,providing an independent electricity price for each electric vehicle,regulating the charging behavior of electric vehicles,reducing the charging cost of electric vehicles and reducing the electricity cost of the parking lot itself.Aiming at the matching problem between shared private parking spaces and electric vehicles in a multi-node microgrid,a vehicle candidate list is proposed that comprehensively considers vehicle quotation and vehicle charging optimization revenue.Secondly,this paper models and analyzes the electric vehicle conventional charging scenario,the electric vehicle self-charging optimization scenario,and the parking lot regulation electric vehicle charging scenario respectively.In the scenario of parking lot regulation electric vehicle charging,a nested optimization model for calculating vehicle charging optimization revenue is proposed.Then,in order to solve the nested optimization model,an improved Lagrange multiplier method is proposed to construct the equivalent model of the optimal situation of electric vehicle self charging and the equivalent model of parking lot regulation and control of the electric vehicle charging situation.Thus,the complex nested optimization problem is transformed into a conventional nonlinear optimization problem which can be solved by gradient descent method.Finally,the simulation results of the operation strategy of electric vehicle sharing parking spaces under the multi-node microgrid environment are analyzed and studied.The results show that in the scenario of parking lot regulation electric vehicle charging,the electric vehicle charging cost is the lowest,and the parking lot electricity cost is the lowest.The interior point method based on the equivalent model is far superior to the genetic algorithm based on the original model in convergence speed,which verifies the superiority of the improved Lagrangian multiplier method.The analysis of a numerical example verifies that the operation framework proposed in this paper is feasible,which brings convenience and benefits to owners of microgrids,parking lots,electric vehicles,and shared parking spaces.