Research on Statistical Characteristics of Partial Discharge Ultrasonic Signals in Switchgear

Abstract

Switchgear plays a vital role in the power system and is an essential part of ensuring the safe and stable operation of the power system. In this paper, a test platform for partial discharge of switchgear is built on the laboratory site. The creeping discharge model used is the creeping discharge of insulators. At the same time, the ultrasonic signal is collected when partial discharge occurs in the switchgear. According to the data obtained by the platform, using the two characteristic parameters of shape and scale, analyze and discuss the ultrasonic partial discharge of the switchgear based on the threshold value, and give the threshold value suggestion of the switchgear in the actual operating state. The recommended values provide relevant suggestions for power grid operation and maintenance, and have certain guiding significance.