Petrochemical enterprise rainfall forecast representative meteorological station selection method

The invention discloses a petrochemical enterprise rainfall forecast representative meteorological station selection method comprising the following steps: obtaining historical meteorological station observation data and carrying out preprocessing to obtain rainfall time sequence data of each kilometer grid hour; according to the latitude and longitude and the rainfall time sequence data, obtaining a rainfall time sequence of the grid point; according to a rainfall time sequence observed by a meteorological station, calculating to obtain a cosine similarity of the rainfall time sequence; calculating a distance weight matrix between the petrochemical enterprise and the meteorological station, and carrying out normalization processing; calculating the gradient difference between the petrochemical enterprise and the meteorological station; according to the rainfall time sequence cosine similarity, the distance weight matrix and the gradient difference, calculating to obtain a representative index of the meteorol