计及虚拟电厂市场交易的主动配电网两阶段优化调度

Two-Stage Optimal Dispatching of Active Distribution Network Considering Virtual Power Plant Market Transaction

目前,虚拟电厂与主动配电网的耦合联系进一步加深,针对含有虚拟电厂市场主体的主动配电网优化调度问题,有必要研究系统内多种灵活性资源与虚拟电厂中不确定性因素在不同时间阶段的协调互动.以主动配电网综合成本最小化和虚拟电厂市场收益最大化为目标,提出一种计及虚拟电厂市场交易的主动配电网日前实时两阶段调度方法.日前阶段,基于系统灵活性边界,构建了综合考虑网侧灵活性资源协调调度和虚拟电厂日前出清的双层优化模型;在此基础上,实时调整虚拟电厂竞标方案和主动配电网运行策略.最后,在改进IEEE 33节点系统中进行仿真试验,结果表明:所提模型可以有效提升虚拟电厂交易竞争力和配电网运行灵活性水平,可为未来电网市场化发展下的优化调度提供参考.

At present,the coupling of virtual power plant(VPP)and active distribution network(ADN)has been further deepened.Aiming at the optimal dispatching problem of ADN with VPP as a market participant,it is necessary to study the coordinated interaction between various flexible resources in ADN and uncertainty factors in VPP in different time stages.On this basis,with the goal of minimizing the comprehensive cost of ADN and maximizing the market revenue of VPP,a two-stage dispatching method for ADN considering VPP transaction is proposed.In the day-ahead stage,according to the flexibility boundary of the system,a bi-level optimization model is established considering the dispatching of flexible resources in ADN and day-ahead clearing of the VPP.On this basis,the bidding scheme of VPP and the operation strategy of ADN are adjusted in real time.Finally,an improved IEEE 33-node system is taken as an example for simulation analysis,and the results show that the proposed model can improve the market competitiveness of VPP and the operational flexibility of distribution networks both,which provides a reference for optimal dispatching under the future marketization development of power grid.