Abstract: To enhance the economy and reliability of an isolated wind/solar/storage microgrid, it is necessary to configure the capacity of microgrid reasonably. However, because of the complicate ownerships of the wind turbines, the photovoltaics and the storage batteries held by different investors, the conflicts may take place between the global optimal operation of the microgrid and the pursuit of individual interest of each investor. To comply with the market management mode of the future microgrid operation, three kinds of game models (i.e., the non-cooperative game model, the wind and photovoltaic power dominant game model, and the wind power dominant game model) are established respectively, which are based on the correlation principles of the pure-strategy Nash equilibrium and the Stackelberg competition strategy of the game theory. The maximization of annual average income within the operating life cycle of the equipment is taken as the optimization objective subject to the loss of power supply probability as the reliability constraint. Then with regards to the above three models, the optimal capacity configuration of the wind/solar/storage microgrid are solved. According to the case study results and sensitivity analysis of the loss of power supply probability, the reasonableness and effectiveness of the proposed models are verified.

Key words: isolated wind/solar/storage microgrid, loss of power supply probability, pure strategy Nash equilibrium, stackelberg game, capacity configuration