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Reliability And Benefit Assessment Of Distribution Networks With Accessed Electric Vehicles

Posted on:2016-04-03Degree:MasterType:Thesis
Country:ChinaCandidate:Y ChenFull Text:PDF
GTID:2272330479984600Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
With the energy crisis and environment problem increasing prominently, as a new means of transportation, electric vehicles(Electric Vehicle, EV) will be accessed to distribution networks more and more, bringing comprehensive benefits for the public but also a huge challenge to distribution system reliability. With the development of smart grid and V2G(Vehicle-to-Grid) technology, and under the premise of meeting the use of EV user, EV can be used as distributed energy storage power for discharging power to distribution system at peak hours, improving the negative impact on distribution reliability which brings by large-scale EV. Simultaneously, V2 G technology can reduce operating costs, save energy and reduce CO2 emissions.This paper mainly studies distribution network with private EV accessed, by studying the impact of electric vehicle charging and discharging behavior of the distribution network, will improve the reliability of the distribution network, reduce operating costs, improve energy efficiency, improving the environment, has important theoretical and practical significance.Combine with the residents commuting patterns, charging and discharging characteristics and spatial distribution characteristics of EV, build electric vehicle charging and discharging model to analyze the impact of EV charging and discharging power on distribution network load. In particular, driving line of EV will impact on the charge and discharge behavior. To this end, according to the distribution network load type zoning, account for random line of EV, the shortest path and the shortest driving of EV as the objective function, the optimal driving route multi-objective optimization model of EV is proposed. Example results shows: control the charging and discharging of EV orderly can reduce peak-valley ofdistribution network e fficiently.In order to analyze the relationship between the charging and discharging of EV and distribution network reliability, the reliability index of distribution network with EV is defined, the distribution network random fault will interrupt charging of EV. Based on the Latin Hypercube Sampling of Monte Carlo method is proposed, to assessment the reliability of distribution network with EV accessing. The results shows: using V2 G to control the discharge of EV into the grid can improve the negative impact of large-scale electric vehicle access for reliability brings.Based on the theory of TOU price and V2 G market agreement, the cost- benefit model of electric vehicle users and power companies, energy-saving and emission reduction benefits model of EV, distribution network reliability benefit models is established. From benefit of EV users and power companies, analyzed the impact of single tariff and TOU pricing on the optimal discharge electricity and power of EV. Based on user interruption cost, the influence of EV on the distribution network reliability benefits is analyzed. Example shows: EV accessing to the distribution network can improve economic efficiency of user and power companies, but also improve the public benefits of energy conservation efficiency and reliability of the distribution network.
Keywords/Search Tags:Electric vehicle charging and discharging model, distribution network random fault, reliability evaluation, energy saving benefits, reliability benefits
PDF Full Text Request
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