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随着智能电网的发展,分布式电源(distributed generation,DG)广泛接入电力系统。然而以风能和太阳能为代表的单个DG对大电网来说视为不可见,在参与市场交易时存在诸多不利因素。考虑多能源资源的影响,建立了由DG、负荷以及储能组成的虚拟发电厂(virtual power plant,VPP)模型,同时将多个VPP进行互联,在满足各自VPP内部供需平衡的基础上,让盈余电量在VPP集群间进行共享,实现多阶段市场交易。提出的交易方法以VPP内部和网间的交易收益最大化为优化目标函数,以尽可能消纳可再生能源为目的,同时计入需求响应(demand response,DR)策略,得到网内用户科学用电计划、网间合理报价结果,为实现多个VPP健康灵活交易提供参考。
With the development of smart grid, distributed generation (DG) has extensive access to the power system. However, a single DG represented by wind energy and solar energy is not visible to the large power grid, and there are many unfavorable factors when participating in market transactions. Considering the influence of multi-energy resources, a virtual power plant (VPP) model consisting of DG, load and energy storage is established. At the same time, multiple VPPs are interconnected. Based on satisfying the internal supply and demand balance of each VPP, Surplus power is shared between VPP clusters to enable multi-phase market transactions. The proposed transaction method maximizes the transaction gains within and between VPPs as the optimization objective function, and takes the demand response (demand response, DR) strategy as objective to minimize renewable energy as much as possible, Electricity plan, reasonably quoted results among the networks, and provide reference for achieving healthy and flexible trading of multiple VPPs.