Operation Strategy of Independent Power Supply Microgrid Cluster With Multiple Investment Entities

Under the background of the rapid development of green economy and new energy, renewable energy power supply has been developed rapidly. In order to deal with the problems of high volatility and weak anti-interference ability of distributed energy, it is of great significance to explore the operation strategy of independent power supply microgrid group dominated by renewable energy. According to the planning and construction of microgrid and the corresponding control mode, the independent operation and interconnected operation strategies of microgrid are proposed. In order to reduce the phenomenon of abandoned wind and light in the independent operation of microgrid and improve its economic benefits, this paper established a bi-level optimization model covering the internal and inter-microgrid scheduling with the goal of minimizing the independent operation cost of microgrid and maximizing the social benefits of microgrid interconnected operation. The alternating direction multiplier (ADM) method is used to solve the problem iteratively to obtain the renewable energy output power, the energy storage output power, and the electricity purchase and sale strategy that take into account the overall operation efficiency of each micro-network body and its group. Finally, through the simulation analysis of 14-node independent power supply microgrid group, the rationality of the proposed model and the effectiveness of the method are verified.