Alternating current and direct current power grid optimal power flow calculation method and system considering source load uncertainty

The invention discloses an AC/DC power grid optimal power flow calculation method and system considering source load uncertainty, and a constructed back-to-back flexible DC AC/DC power grid optimal power flow model considers the uncertainty of new energy and load, and can effectively consider the influence of the source load uncertainty. And linear power flow equation constraints are provided for optimization problem modeling, so that the method provided by the invention has relatively high calculation and solving efficiency, influences of reactive voltage and system network loss can be considered, the solving precision of the model is improved, and the problems that an existing alternating current power flow model is large in calculation difficulty, long in time consumption and low in calculation efficiency are solved. The technical problems that reactive voltage is difficult to consider in a direct-current power flow model, calculation errors are large due to neglect of network loss, uncertainty of new ener