The optimal configuration of Energy storage is an important issue in wind/PV/storage hybrid system designing. This paper proposes a strategy of optimizing energy storage capacity in wind/PV/storage hybrid system. Firstly, the double-layer decision model of the storage capacity configuration is established. The decision variables of the outer decision model are the power and capacity of the energy storage, while the target is the minimum investment of the storage and the contact line penalty. The decision variable of the inner decision model is the charge and discharge power of the energy storage during the operation, while the target is to minimize power fluctuation on system tie line. Then a typical system is analyzed as a simulation example, including wind power, photovoltaic, battery energy storage and load. According to the typical daily data in spring, summer and winter, the simulation results verify the energy storage configuration strategy proposed.
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2018, Vol. 33 
