【摘要】 发电资产虚拟拆分一般通过拍卖虚拟发电机组(Virtual Power Plant,VPP)来实现,按VPP机组的实际发电调度权来区分,发电资产虚拟拆分存在金融VPP和物理VPP两种模式。为了比较研究两种虚拟拆分模式对发电商市场力的影响,分别建立了考虑金融VPP和物理VPP的电力市场古诺竞争均衡模型,并采用非线性互补方法来求解。从理论上证明了在相同拆分数量的情况下,采用物理VPP模式的虚拟拆分比金融VPP模式更能降低市场价格。算例仿真进一步表明,当需求弹性越小时,物理VPP模式的虚拟拆分在降低市场价格方面优于金融VPP模式的效果更明显。这意味着对于需求弹性相对较低的电力市场,采用物理VPP模式的虚拟拆分更有利于缓解发电商市场力和提高社会福利。更多还原

【Abstract】 Virtual divestiture of generation capacity assets is generally implemented through virtual power plant(VPP) auction. According to the actual dispatch right of the VPPs, virtual divestiture can becategorized into two modes, i.e. financial VPP mode and physical VPP mode. In order to compare the impacts of the two modes of virtual divestiture on generators’market power, the Cournot equilibrium models are established, respectively, forelectricity markets with financial VPP and electricity markets with physical VPP.The nonlinear complementarity method is employed to solve these equilibrium models.It is shown theoretically that, given a same volume of virtual divestiture for the two modes,a wholesale market with lower prices can be achieved using the physical VPP mode rather than the financial VPP mode. Furthermore,numerical simulation shows that with decreasing demand elasticity, the effect that the physical VPP mode is superior tothe financial VPP mode in lowering the market price will be more remarkable.This means that for electricity markets with relatively low demand elasticity ,the virtual divestiture using the physical VPP mode will be more helpful to mitigate generators’market power and improve social welfare than the financial VPP mode.更多还原