Power supply planning method and system considering wind power output uncertainty

The embodiment of the invention provides a power supply planning method and system considering wind power output uncertainty, and the method comprises the steps: obtaining regional power grid parameters, wind power, loads and other related data; according to the regional historical wind power output curve, wind power output of unit installed capacity is calculated, and historical wind power output sample information is determined; constructing an uncertainty set of wind power output cumulative probability distribution, obtaining a wind power output uncertainty interval based on an imprecise Dirichlet model, and generating a wind power output typical scene according to the obtained wind power output uncertainty interval; establishing a first power supply planning optimization model by taking the minimum power supply cost as a target; solving the model to obtain an optimal solution of the power supply cost; taking the optimal solution as a reference value of a power supply planning optimization model, and setti