Fault diagnosis method, fault diagnosis device and pre-alarm system for transmission equipment

The invention provides a fault diagnosis method, a fault diagnosis device and a pre-alarm system for transmission equipment. The method comprises the steps that a first image is determined according to operation parameters of the transmission equipment, the operation parameters comprise temperature, vibration, current and pulse current, the first image comprises an image of any operation parameter changing along with time, and the pulse current is used for determining the partial discharge state of the transmission equipment; the first image is input into a multi-parameter dynamic tracking model to obtain a predicted fault type, the multi-parameter dynamic tracking model is obtained by training an improved BP neural network model, and the improved BP neural network model is a BP neural network model which is trained after optimal network parameters of a BP neural network are not determined through a fireworks algorithm. According to the method, the operation parameters of the high-voltage transmission equipme