Transformer partial discharge positioning method and system

The invention provides a transformer partial discharge positioning method and system, and belongs to the field of transformer internal partial discharge positioning, and the method comprises the steps: employing an ultrasonic sensor and an ultrahigh frequency sensor to collect an ultrasonic signal and an ultrahigh frequency signal at the same time for a transformer with an insulation defect; taking the ultrahigh frequency signal as a reference signal, and respectively calculating the time of propagation of the plurality of groups of ultrasonic signals from the insulation defect in the transformer to the ultrasonic sensor; according to the position of the ultrasonic sensor and the propagation time of the ultrasonic signal, establishing a local discharge source positioning equation in the transformer based on the signal propagation time; and solving the positioning equation of the partial discharge source in the transformer by using an improved fireworks algorithm with a gravitational operator, and obtaining th