Photovoltaic output prediction method and system based on multi-factor correction

The invention discloses a photovoltaic output prediction method and system based on multi-factor correction, and the method comprises the steps: building a photovoltaic output physical model, obtaining the meteorological information and equipment information of a prediction day, and determining the initial photovoltaic prediction power of the prediction day; determining influence factors for photovoltaic output prediction, and obtaining an influence factor importance weight vector corresponding to each variable importance evaluation method by adopting multiple variable importance evaluation methods; evaluating the multiple variable importance evaluation methods by adopting a fuzzy multi-criterion method, and determining an optimal evaluation method from the multiple variable importance evaluation methods; according to the influence factor importance weight vector corresponding to the optimal evaluation method, determining a correction coefficient of photovoltaic output; and determining final photovoltaic pred