1.Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Shanghai 200240, China;2.State Grid Shanghai Municipal Electric Power Company, Shanghai 200023, China

As the development of demand-side resources continues to increase and the electricity market mechanism is being improved, the decentralized flexibility resources on the demand side will play a more important role in the power dispatch and trading. The construction of virtual power plants provides a new idea for the demand-side resource management and utilization, while the power sharing has attracted much attention for its ability to promote regional power balance and enhance power system flexibility. To this end, the power sharing trading mechanism based on virtual power plant is studied. Firstly, the concept of sharing-based virtual power plant is proposed and the framework of power sharing with renewable energy stations is established. Secondly, the risk scheduling model of sharing alliance based on the minimum-maximum regret method considering the uncertainty of the renewable energy output is established. Then, the price mechanism of shared power based on the consistency theory is derived. Finally, case analysis is conducted based on the modified IEEE 33-bus system. Results demonstrate that the proposed scheduling method and trading mechanism can improve the utilization efficiency of user-side resources, promote the renewable energy accommodation and balance the regional supply and demand of the power grid.

This work is supported by State Grid Corporation of China (No. 5400-202317213A-1-1-ZN).