Regional Power Grid Dispatching Strategy For Multi-virtual Power Plant Game

At present,researches on virtual power plants mainly focus on the aggregation of distributed power sources with small capacity to realize the high consumption of low-carbon energy in the power grid.Therefore,it is an important factor to promote the development of virtual power plants to reasonably obtain more benefits under the market conditions,and further researches are needed.In view of the above problems,this paper proposes a regional power grid economic dispatching method based on multi-VPP game,and carries out the following work:Firstly,virtual power plants composed of photovoltaic,micro gas turbine,battery and load is established,and the components of the virtual power plants are analyzed to summarize the external cost characteristics of the virtual power plants as a whole,laying a foundation for the subsequent establishment of the two-layer model of power grid.Secondly,based on the open electricity sales market,this paper proposes a regional power grid economic dispatch method based on non-cooperative game bidding of multi-VPP,aiming at the problem that virtual power plants will participate in market competition as market players in order to obtain higher returns when the market is relatively mature.The upper level takes the maximum profit of each virtual power plant as the target,carries on the non-cooperative game on the basis of changing the strategy quotation coefficient,and finds the nash equilibrium point quickly and accurately by changing the step size to get the optimal quotation of each virtual power plant.Considering both active power and reactive power,and aiming at minimum power purchase cost and network loss,the economic dispatching model of the power grid is solved by using the tracking center locus interior point method to realize market clearing.Finally,the effectiveness and practicability of the proposed two-layer economic scheduling method are verified by a simulation example.