Partial discharge gas sensor for air switchgear based on p-GO-n-WO₃ heterojunction and detection method

Abstract Air switchgear plays a critical role in control and protection during power transmission and distribution, where internal insulation defects may cause partial discharge (PD), threatening equipment safety. This paper aims to study the detection method of gas decomposition characteristics during partial discharge within air switchgear and designs an NO 2 gas sensor based on a p-GO-n-WO 3 heterojunction for detecting partial discharge characteristic gases. The preparation process of the p-GO-n-WO3 heterojunction gas sensor is detailed, followed by experimental verification of the sensitivity and response characteristics of the sensor to NO 2 gas at room temperature. The results demonstrate that the 10 wt% GO-WO 3 sensor exhibits high sensitivity at room temperature, effectively detecting NO 2 gas generated by partial discharge in air switchgear, thereby providing technical support for improving equipment operational reliability.