Research on capacity optimization of hybrid energy storage to stabilize offshore wind power fluctuation considering energy storage selection
Energy storage devices are often utilized to stabilize the output power fluctuations and reduce the impact of intermittency and volatility of offshore wind power on the power grid.Considering the limitations of using fixed hybrid energy storage combinations for capacity optimization research,a hybrid energy storage system(HESS)capacity configuration approach that considers energy storage selection is proposed.To cope with the uncertainty of offshore wind power,an autoregressive moving average model and the scenario reduction approach based on probability distance are utilized,and a hybrid energy storage power allocation strategy based on wavelet packet decomposition is proposed.A dual-cycle model is adopted to combine allocation strategies with energy storage selection,and an economic optimization model of energy storage system is established,aiming at the lowest life cycle cost of energy storage,to accomplish the selection of energy storage and the optimal capacity configuration.Taking the measured data of a domestic offshore wind farm as an example for simulation,it is concluded that the HESS composed of all-vanadium flow battery and super-capacitor is the optimal combination scheme,and the all-vanadium flow battery and super-capacitor can give full play to their advantages and have complementary roles.
offshore wind powerstabilizing fluctuationsenergy storage selectionhybrid energy storagecapacity optimization
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