Study On The Influence Of Electric Vehicle Growth On Power Supply In Residentialarea And Power Supply Scheme

In recent years,with the rapid development of electric vehicles,the population of EVs in residential communities is rapidly increasing,which may lead to the normal distribution of power distribution in some areas.Therefore,it is of practical significance to research power supply scheme.Accurately predict the residential area of electric vehicle charging load on the upgrading of new power grid has an important guiding role,with the rapid development of active distribution network,the upgrading of distribution network in the traditional distribution network reform program can also be introduced into the new Train of thought.This paper first predicts the V2 G load of electric vehicles.In view of the situation that the distribution network can not guarantee the charging of electric vehicles,two reconstruction schemes are proposed in this paper.The first one is to establish the microgrid to assist the distribution network.The second one is to take the distribution network planning of energy-efficient power plants into consideration.The main research work of this dissertation includes:(1)Propose load forecasting of electric vehicle V2 G based on electric vehicle travel chain.Improve the MNL model of predicting user's travel chain,establish the probability distribution and travel characteristics of the user's travel chain;establish electric vehicle load forecasting model with different charge-discharge modes;predict and analysis V2 G load of residential electric vehicles by Monte Carlo simulation;(2)The traditional transformation of distribution network.From the transformation of the line,transformer transformation and reactive power compensation configuration transformation analysis of three aspects,the establishment of distribution network transformation of the annual cost of the total cost mathematical model,combined with the results of the transformation analysis to calculate the distribution network transformation costs.(3)Propose building a Micro-grid cooperating with distribution network based on electric vehicle V2 G.Propose a new method of maximum power of distribution network nodes;derive the interaction power between microgrid and tie line through the difference of internal power demand in microgrid;use Monte carlo simulation to predict the uncertainty of electric vehicle in the residential area.Establish the planning model of micro grid with electric vehicle V2 G,and through LINGO software to optimize the planning model.(4)Propose supply scheme of distribution network introducingEnergy Efficiency Power Plant based on electric vehicle V2 G.Introduce the concept of energy efficiency power plant,establish the distribution network planning model considering the energy efficiency power plant,use the forward-back-generation method to calculate the distribution network power flow and implement the distribution network planning model by using the spanning tree algorithm.