Motor notch partial discharge evaluation method

The invention discloses a motor notch partial discharge evaluation method, which belongs to the technical field of generator online monitoring, and is characterized by comprising the following steps: a, arranging a plurality of EFPI ultrasonic sensors along the circumferential direction of a generator stator bar notch; b, after the EFPI ultrasonic sensor receives a partial discharge signal of the generator stator bar, high-frequency signal energy is unidirectionally transmitted to a mediation module through a circulator to be converted into an electric signal, an acquisition module transmits electric signal data to an industrial personal computer to complete partial discharge signal monitoring, and a partial discharge measurement result is displayed through a display; c, completing transverse evaluation; and d, completing longitudinal evaluation, and obtaining an interference signal or an alarm signal in combination with a transverse evaluation result. According to the method, the EFPI ultrasonic sensors are