Method and system for calculating regional photovoltaic equivalent light resources influenced by multiple weather types

The invention provides a regional photovoltaic equivalent light resource calculation method and system influenced by multiple weather types, and the method comprises the steps: determining the weather type of each grid according to the total cloud cover of each grid in a region; determining the weather type of each photovoltaic power station according to the weather type of each grid and the latitude and longitude information of each photovoltaic power station in the area; based on the weather type of each photovoltaic power station and the earth surface solar radiation value of each photovoltaic power station, calculating equivalent light resources of the photovoltaic power stations influenced by different weather types in the region by adopting a weighted average method; according to the invention, cloud cover information of each grid in a region is utilized to extract multiple weather types of the grids, and equivalent light resource values of photovoltaic power stations influenced by different weather typ