Research On The Configuration Method Of The Hybrid Energy Storage System In The Wind Storage Combined System

With the deteriorating global environment and the depletion of traditional fossil fuels,new renewable and clean energy generation technologies represented by wind power generation are gaining more and more people’s attention.However,with the rapid development of wind power generation,the hidden dangers to the power grid caused by the uncertainty of wind power have also become increasingly prominent.However,the hybrid energy storage system composed of batteries and other energy storage can make up for the shortcomings of wind power through the rapid charging and discharging capacity through reasonable capacity allocation,which has a positive effect on promoting the development of wind power and enhancing the ability of the system to absorb wind power.During the process of joint operation with the wind power,the battery energy storage system frequently performs the charge-discharge cycle in a intermittent state,and is often in a state of power loss or high-rate charge-discharge operation state.This non-ideal operation condition greatly shortens the service life of the battery.At the present stage,the cost of energy storage system is high.During the construction and operation of the wind storage system,the total cost of the battery is already close to or even exceeded the cost of the wind turbine.Therefore,prolonging the service life of the battery has a very positive meaning for improving the economy of the wind storage system.Against this background,this paper proposes a hybrid energy storage management strategy that can optimize battery operating conditions in a wind storage system.Under this strategy,the fluctuation of output power caused by the loss of power and energy caused by the system operation is considered,and the output power fluctuation is limited by the opportunistic constrained programming so as to meet the requirements of the system for grid-connected wind power.On this basis,in order to be closer to the actual grid dispatch demand,this paper divides the target output power according to different time windows,and establishes the combination of the opportunity constraint and the rigid constraint with the objective of minimizing the purchase cost and operating cost of hybrid energy storage planning model.The genetic algorithm is used to solve the model,and the capacity configuration of hybrid energy storage in wind power storage system is obtained.