Micro-grid equivalent modeling method based on optimal power flow

The invention discloses a micro-grid equivalent modeling method based on an optimal power flow, which comprises the following steps of: predicting the load, wind power and photovoltaic output of the next day according to historical operation parameters of a load and a power supply in a microgrid, and establishing an uncertain probability distribution model of a source side based on errors of load, wind power and photovoltaic prediction; sampling the uncertain model for multiple times by utilizing a Monte Carlo method to generate multiple operation scenes, and then optimizing and solving the multiple operation scenes by utilizing a power flow optimization model in the micro-grid to obtain power flow fluctuation curves on a micro-grid tie line in each operation scene; fitting the power flow fluctuation curve data to obtain a tie line power fluctuation curve, and finally translating the fluctuation curve up and down to enable an operation area formed by translation to cover more than 99% of operation points, and