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.