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Study On Capacity Planning And Coordinated Charging Of Large-scale Centralized Charging Stations

Posted on:2017-05-21Degree:MasterType:Thesis
Country:ChinaCandidate:Q Q GuoFull Text:PDF
GTID:2272330503482698Subject:Power system and its automation
Abstract/Summary:PDF Full Text Request
With the popularity of electric vehicles and the improvement of battery technology,especially the increasing requirement of environmental protection, which lead to development of electric vehicles. The number of electric cars will gradually increased and has the trend to replace the fuel vehicles. Under the guiding thought of "centralized charging,unified distribution" of state grid corporation, the battery swapping scheme combined with the construction of large-scale centralized charging stations, which is the most competitive business development model in electric vehicles industry. Concentrated charging station as high-power load is significantly influenced of power system operation,in certain cases, it can be used as a power source like pumped storage power plant, for the cutting of peak load in power system. Based on the above analysis, in this paper, the centralized charging stations were studied as follows:At first, introduced the concept and characteristics of three main battery charging mode: the conventional charging, quick charging and the mode of battery replacement. In addition, the "concentrated charging, unified distribution" patterns were summarized.Analyzed the structure of charging-swapping network and key technology of centralized charging stations. According to the driving properties of electric vehicles, the electricity demand of electric vehicles was analyzed.Moreover, Meeting the demand on battery swapping of electric vehicles, capacity planning of large-scale centralized charging stations considering the distribution scheme on battery pack is a way to reduce the investment of equipment and cost during the operation period, which is a problem to be studied. Firstly, this paper analyzed the distribution process on some hypothesis conditions, then given the distribution model. And then based on battery swapping demand and distribution process established the operation simulation model of charging station, which is used to solve the objective function. A mathematical model is developed, with the annual cost as the objective function and the scale and demand of battery swapping as the constraints, which is solved through the Bacterial Colony Chemotaxis(BCC) algorithm. Analyzed the influence of distributionplanning and charging mode to charging station, the results show that: the proposed optimization model is effective and feasible, and the algorithm is reasonable.At last, the coordinated charging strategies of concentrated charging station were analyzed. Based on time-sharing electricity price mechanism and the operation mode of the concentrated charging station, Meeting the demand on battery swapping of electric vehicles, a optimization model for the optimal charging and discharging was establish,which was establish as the goal of a minimum operating costs of concentrated charging station. The capacity allocation and distribution plan of charging station was given to solve the model. Example results show that: the proposed optimization model is simple and effective, which is useful to improve the economic benefit of charging station operation.
Keywords/Search Tags:electric vehicles, centralized charging station, battery charging mode, capacity planning, coordinated charging, BCC
PDF Full Text Request
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