Multi-time Scale Dispatch of Distribution Network and Multi-microgrid with Renewable Energy Access

As renewable energy sources such as wind turbines and photovoltaics are connected to the distribution network (DN) in the form of multi-microgrid (MMG), the uncertainty will bring challenges to the reliability and economy of the joint operation of the DN and MMG. In this regard, a multi-time scale dispatch method for DN and MMG considering the uncertainty of renewable energy is proposed. First, establish the multi-time scale dispatch framework of DN and MMG. In the day-ahead stage, consider the uncertainty of the wind and solar output, and establish a stochastic dispatch model for DN and MMG. In the intraday dispatch stage, the intraday rolling dispatch model is constructed, and the output of various units is adjusted based on the day-ahead dispatch strategy to fully suppress the power fluctuations caused by the day-ahead forecast errors. Finally, an example is provided to demonstrate the accuracy and economy of our dispatch method.