In order to improve the accommodation level of renewable energy,a composite control strategy for three groups of batteries considering the unbalance of charging and discharging energy is proposed,and a life cycle cost model is constructed to comprehensively analyze the costs of multi-type energy storage under the composite control,providing a reference for economic and effective wind power fluctuation sup-pression.Based on the grid-connected standard,the reference power of the energy storage system is obtained by using the complementary ensemble empirical mode decomposition with adaptive noise algo-rithm,and the internal power is decoupled on the principle of minimum mode aliasing under the hybrid en-ergy storage mode.A composite control strategy of energy storage based on three groups of batteries is pro-posed.Compared with the dual battery energy storage mode,the composite control strategy takes one group of batteries as backup,which improves the tolerance of the charging and discharging energy unbalance,so that each group of batteries can operate at the optimal depth of discharge.The single-battery energy storage,the hybrid energy storage,the dual-battery energy storage and the three groups of batteries integrated energy storage are respectively used to track power instructions.Then,the capacity of multi-type energy storage is configured according to the constraints of charging and discharging efficiency and state of charge of the energy storage system.The suppression cost of the multi-type energy storage composite mode is comprehen-sively analyzed based on the life cycle cost model.Based on the actual wind farm data,the economy of multi-type energy storage under composite control is analyzed,and the reference scheme is given.
关键词
新能源消纳/多类型储能/复合控制/全寿命周期成本/经济性分析
Key words
accommodation of renewable energy/multi-type energy storage/composite control/life cycle cost/economic analysis
维普
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