Research on Vehicle-to-Building Charging Strategy in Microgrid
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Yali Liu, Xudong Wang, Xiaohui Hu, Yujun Liu, Cheng Hu
Large parking location and plenty of residence time of EVs in building provide the spatial space and temporal convenience for energy interaction, so the precisely control of EVs’ charging and discharging can be realized through the vehicle-to-building (V2B) technology. This paper studies the optimization method of EVs charge- discharge mode. At firstly, a multi-type building energy system model with EVs is established. Then, this paper establishes a bi-level optimal model for EVs’ charging and discharging. The objective function of the outer level is to reduce the valley-to-peak difference of the equivalent load curve of building during the period of V2B. The objective function of inner level is to minimize the building operation cost paid by load aggregators which can be solved through CPLEX. The simulation results show that the proposed strategy can significantly reduce the valley-to-peak difference of buildings’ load and the operating cost paid by load aggregators.
Bi-Level Optimization, Building Load, Electric Vehicles, Charge and Discharge, Load Aggregator