含电动汽车充电负荷的交直流混合微电网规划

Planning of AC/DC Hybrid Microgrid with Integration of Electric Vehicles Charging Load

目前分布式电源和家用电动汽车接入量越来越大,而负荷容量的增长和负荷种类的增多使得原有交流微电网已经不能支撑新增负荷需求,建立能够满足多种需求的新型微电网系统势在必行。围绕包含风电、光伏、储能电池和电动汽车的交直流混合微电网系统的优化配置问题,建立了考虑综合约束条件下含电动汽车有序充电的交直流混合微电网多目标规划模型:以降低优化配置成本和减小负荷波动为目标,应用CPLEX优化软件求解。算例比较了含电动汽车的交直流混合微电网与交流微电网优化配置的差异,研究了电动汽车有序充电以及新建交直流混合微电网与原微电网交互对优化配置的影响,验证了所提出方法的合理性和有效性。

Currently, a lot of distributed generators and household electric vehicles are connected to the grid. The increase in capacity and the variety of loads have made it impossible to support the new load demand by the original microgrid. It is imperative to establish a new microgrid system that can meet a variety of needs. Taking into account the comprehensive constraints and the orderly charging, this paper develops a multi-objective optimal planning model in AC/DC hybrid microgrid system with wind turbine generators, photovoltaic generation, energy storage battery and electric vehicle. In order to reduce the cost of configuration and the load fluctuation, CPLEX optimal programming has been used to solve the objective function. The case study compares the difference between the new AC/DC hybrid microgrid and the original microgrid. A study is made on the rationality of electric vehicle orderly charging as well as the influences of interaction between the two types of microgrids on optimized configuration. The results verify the effectiveness and feasibility of the approach proposed.