Power transmission and transformation ultrasonic partial discharge sensor and method thereof

The invention discloses a power transmission and transformation ultrasonic partial discharge sensor and a method thereof. The power transmission and transformation ultrasonic partial discharge sensor comprises a processor, an ultrasonic receiving probe, a TEV transient ground voltage detection circuit and a digital temperature and humidity IC, the output end of the ultrasonic receiving probe is electrically connected with an ultrasonic detection circuit, a front operational amplifier and a logarithmic amplifier are arranged in the ultrasonic detection circuit, and the ultrasonic receiving probe is electrically connected with a processor and a TEV transient ground voltage detection circuit through the ultrasonic detection circuit. The TEV transient ground voltage detection circuit logarithmic amplifier and the input operational amplifier of the front arithmetic unit are connected to a power equipment internet of things management and application platform through a power APN security encryption channel by adopt