Flexibility Auxiliary Service of Microgrid Cluster Based on Stackelberg Electricity Price Optimization

The high penetration rate of renewable energy generation creates a huge demand for power system flexibility. Microgrid is an important way to accept distributed renewable energy, so its flexibility should be fully exploited. This paper proposes a day-ahead operation model for microgrid cluster that can realize flexibility auxiliary services, which would guide microgrid operators to participate in demand-side response and provide flexible ramping product (FRP) by electricity price incentives. This paper uses the Stackelberg game theory to model and analyze the economic interaction between microgrid cluster and microgrids. By optimizing the internal transaction electricity price, all participants in the game can obtain higher returns. The simulation results show that the proposed method can improve the economic benefits of all participants and effectively enhance the flexibility service capability of microgrids.