| The low utilization of wind energy is the important factors to restrict the development of China’s wind power industry.Restricted by the power supply structure,power grid structure and power load characteristics,peaking capacity of system power is limited in some areas,the power grid cannot meet the demand of further improvement of wind power accommodation.Moreover,the wind energy resources are concentrated,far from the load center,and the power grid dispatching capacity is limited.Therefore demand response mechanism has become an important breakthrough to solve this problem.The time-of-use price is an important means of demand-side response.This mechanism,with price as the economic lever,can guide users to adjust electricity demand,realize peak shaving and valley filling,and increase wind power consumption during valley hours,so as to improve the consumption capacity of wind power.It is necessary to explore the formulation and effective implementation of the time-of-use price for wind power,which has high practical research value for solving the current wind power curtailment problem.The key to the effective implementation of time-of-use price is to ensure the interests of all participants.Therefore,based on the in-depth analysis of the peak valley price and its mechanism,a model of comprehensive income is established.The model fully considers the interests of wind power station,power grid,the users,and the abandoned wind rate.Finally,by setting different scenarios,an example is simulated and calculated.The simulation results show that the model which implements time-of-use price in sales side and online side simultaneously can not only realize multi-party benefits,but also can improve the capacity of wind power accommodation.And raising the peak valley price ratio appropriately can optimize the multi-party benefits and abandoned wind rate.In order to further absorb wind power,this paper designs the application of time-of-use electricity price in the user-side energy storage system.By setting energy storage device on the user side,more electricity of wind power can be consumed in the valley,and at the same time,the user side can obtain the benefits of peak and valley price difference,achieve the overall economy and stability of the system.The time-of-use pricing mechanism established in this paper and its application in user-side energy storage are of great significance for solving the problem of large-scale wind power curtailment,improving the utilization efficiency of renewable energy,saving resources and improving environmental quality. |
