Surface temperature measurement method for thermal fault of plum blossom contact of switch cabinet

The invention provides a switch cabinet tulip contact thermal fault surface temperature measurement method. The method comprises the steps of 1, establishing a switch cabinet temperature fluid field simulation model; step 2, based on the switch cabinet temperature fluid field simulation model established in the step 1, performing streamline analysis of a temperature fluid field, and obtaining temperature measurement points, corresponding to internal hot spots, on the surface of the switch cabinet; 3, obtaining the relation between the switch cabinet load current, the surface measuring point temperature and the internal tulip contact hot spot temperature under different working conditions and defects through orthogonal calculation, taking the relation as an inversion calculation sample, and completing sample training based on a support vector machine regression method to form an inversion calculation model; and realizing hot spot temperature inversion calculation from outside to inside by using the inversion c