Economic study on wind-solar-storage systems technology considering time-of-use electricity prices
Based on the time-of-use electricity price and the cost of wind-PV-energy storage system,technical and economic research of source-grid-load-storage system is studied.Firstly,a microgrid system model integrating renewable energy and energy storage system is proposed,which includes PV,wind power,energy storage system,grid,and load.Then,under the premise of ensuring reliable power supply to the load,an optimization model of the source-grid-load-storage system is established with the goal of optimizing the system economy based on load data,irradiation data,wind speed data,time-of-use electricity price data,and the costs of each unit of the system.Finally,the optimal capacity and economic feasibility of configuring a wind-PV-storage system in a certain region are analyzed in detail through a numerical example.The analysis results indicate that,the energy storage systems store energy at low electricity prices and release energy at high electricity prices,thereby avoiding users from purchasing electricity from the grid at high electricity prices and reducing the cost of purchasing electricity from the grid.The configuration of a wind-PV-energy storage system can effectively reduce the annual cost of purchasing electricity from the grid.
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