Fault diagnosis method and system for transformer hot spot area

The invention is suitable for the technical field of transformer fault diagnosis, and provides a transformer hot spot area fault diagnosis method and system, and the method comprises the steps: collecting a pretreated oil paper sample, and the pretreatment comprises vacuum drying treatment and oil immersion treatment; carrying out accelerated thermal aging treatment on the pretreated oiled paper sample by adopting a non-uniform aging device; selecting a bottom oil sample of the non-uniform aging device within a preset time, measuring the methanol concentration and the ethanol concentration in the oil, and measuring the temperature of the non-uniform aging device; building a fault prediction model of the transformer hot spot area based on a polymerization enhanced classification tree and a regression tree, and inputting the methanol concentration, the ethanol concentration and the temperature of the non-uniform aging device into the fault prediction model for feature training; predicted fault information of th