Method and system for diagnosing key fault problem of photovoltaic power generation system in complex mountain scene

The invention discloses a key fault problem diagnosis method for a photovoltaic power generation system in a complex mountain scene, and the method comprises the steps: collecting corresponding data, and carrying out the preprocessing of the data; establishing a digital twinborn model of the photovoltaic power generation system according to the preprocessed data, and fusing topographic features, equipment characteristics and operation and management data; building a multi-level data system by using multi-source data, and optimizing the digital twin model through the multi-level data system; a photovoltaic power station inspection route planning and navigation scheme is formulated, light resource distribution differences of different blocks of a photovoltaic system are analyzed, energy efficiency analysis among the blocks is carried out according to the light resource differences, and the blocks with low performance are identified; the influence of multiple environmental factors on the photovoltaic system faul