Research On The Model Of Virtual Power Plant Participating In Spot Market

On the way to achieve the goal of "double carbon"(carbon peak and carbon neutrality),vigorously developing new energy power generation such as wind power and photovoltaic has been a clear direction for China’s power development.In addition,with the rapid development of the consumer side of electric vehicles and household energy storage,power users will also transform from single consumers to producers and sellers.In this context,virtual power plants(VPP),as a multi-energy aggregation mode that realizes large-scale access of distributed energy resources to the power grid,has ushered in unprecedented development opportunities.What is more important is that the virtual power plant provides the framework and technical support for the largescale influx of new energy power into the grid,and also provides the guarantee for its participation in the power market.China’s power market construction has been steadily advancing since the new round of power system reform,and the construction of power spot market has achieved remarkable results,especially the Basic Rules of Power Spot Market(Draft for Comments)issued by the National Energy Administration in November 2022,which not only creates a good environment for virtual power plants to participate in power spot market transactions,but also provides policy support.Therefore,this paper studies the transaction model of virtual power plant under the environment of electricity spot market.This paper first combs the relevant theories of the spot electricity market,studies and analyzes the organization mode of the spot electricity market from the four aspects of market mode,market composition,pricing mechanism and quotation method,and then compares and analyzes the connection mode between the electric energy market and the frequency regulation auxiliary service market in the mature foreign power market,and gives the development suggestions suitable for the frequency regulation auxiliary service market in China;Finally,summarize the transaction mode of virtual power plants participating in the power market,and refer to the transaction rules of Shanxi power spot market,focus on summarizing the transaction process of virtual power plants participating in the power spot market,laying the foundation for the subsequent establishment of the transaction model of virtual power plants.Referring to the market rules of the spot electricity market in Shanxi Province,the transaction model of virtual power plants participating in the spot electricity market is studied under the background of double settlement mode and deviation assessment.The flexible load is used to participate in the demand response to suppress the volatility of new energy output,optimize the output curve of the virtual power plant,and obtain the bidding strategy of the virtual power plant in the day-ahead market and the realtime market through the dual coupling of the current real-time market and the subsequent real-time market.And compare with other bidding strategies to verify the effectiveness of the proposed model.In order to improve the profit space of virtual power plants,a transaction model of virtual power plants participating in the electric energy-frequency modulation market is constructed.Considering the volatility of the aggregated new energy output and the difference of risk preference of different market participants,the deterministic bidding model of the virtual power plant is expanded into a robust optimization model by using the two-stage robust optimization theory,so as to make a reasonable allocation for the bidding capacity of the virtual power plant in the two markets and maximize the revenue of the virtual power plant.