Research On Multi-member Benefit Distribution Mechanism Of Virtual Power Plant Based On Cooperative Game

Renewable resources such as wind power and photovoltaic are abundant,but there is a significant problem of uneven distribution of energy and power load.At the same time,the renewable energy output such as wind power and photovoltaic is affected greatly by the weather,which has a certain volatility and randomness.With the withdrawal of some coal power from the electricity market and the large-scale connection of renewable energy sources such as photovoltaic and wind power,the safe and stable operation of the power grid is facing major challenges.As an energy aggregation technology,virtual power plant can aggregate all kinds of dispersed distributed energy into a whole for unified operation and scheduling,so as to improve stability and controllability,and ensure the safe and stable operation of the grid after the connection of renewable energy.At present,the virtual power plant is in the initial stage of participating in the electric power market construction.The existing virtual power plant projects still have problems of high operating costs and insufficient enthusiasm of members for cooperation.Therefore,this paper studies the multi-member benefit distribution mechanism of virtual power plant based on cooperative game.First of all,based on the four operating characteristics of virtual power plant,namely independence,scalability,randomness and schedulability of output,as well as two major technologies,namely coordinated control technology and intelligent metering technology,this paper combines the market mechanism and operation mode of the existing spot market and auxiliary service market.The operation mode of virtual power plant,which includes gas unit,wind power,photovoltaic,energy storage and flexible load,participating in short-cycle power market is proposed.Secondly,the member models of the gas unit,wind power,photovoltaic,energy storage and flexible load inside the virtual power plant are constructed respectively.On the basis of summarizing the operation mode of the virtual power plant participating in the power market,the short cycle power market optimization scheduling model of the virtual power plant is proposed considering the connection between the spot market and the auxiliary service market,aiming at maximizing the overall benefits of the virtual power plant.Thirdly,the cooperative game theory and the three distribution methods in the cooperative game are sorted out,and the three factors affecting the cooperative surplus distribution in the practical application of virtual power plant are analyzed.On the basis of the conventional Shapley value method,Based on the utility theory,member contribution degree and member cooperation intention,the improved factor model of virtual power plant benefit distribution is constructed based on risk level,profit contribution degree and profit growth rate.Moreover,the Shapley value method based on multi-factor improvement is constructed to distribute the whole income of virtual power plant.Finally,the CPLEX solver of MATLAB is used to solve the above model examples,and the feasibility of the proposed scheduling strategy and benefit distribution mechanism is verified.To sum up,the following conclusions are reached:The multi-member benefit distribution mechanism of virtual power plant proposed in this paper can make all members of virtual power plant have different degree of benefit increase after participating in cooperation,and the multifactor improved Shapley value method constructed in this paper can get more comprehensive and fair distribution results,which can promote the enthusiasm of virtual power plant members to participate in cooperation.Also can guarantee the virtual power plant internal stable operation.This study can provide important experience and reference for the formation of cooperative mode of distributed energy in the future,and promote the development and perfection of the integrated power market entity scheduling and profit distribution method.At the same time,while helping the virtual power plant adapt to the new development situation,this study improves the stability and economic benefits of the virtual power plant,ensures the safe and stable operation of the power grid,promotes the transformation,upgrading,optimization and adjustment of the power market,promotes the development and utilization of clean energy,promotes the transformation of the energy consumption structure,and reduces carbon dioxide emissions.To help achieve the national double carbon target.