摘要
基于分时上网电价和风光储系统成本对源-网-荷-储系统的技术经济性开展了研究.首先,提出了一种集成可再生能源和储能的微电网系统模型,该系统包括光伏、风电、储能、电网和用户负荷;然后,在满足对负荷可靠供电的前提下,根据负荷数据、辐照数据、风速数据、分时电价数据以及系统各单元的成本,以系统经济性最优为目标建立了源-网-荷-储系统的优化模型;最后,通过算例详细分析了某地区配置风光储系统的最优容量以及系统的经济性.分析结果表明,储能系统通过在低电价时储能,在高电价时释能,从而避免用户在高电价时从电网购电,进而降低用户从电网的购电成本.
Abstract
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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