Research on Photoacoustic Spectroscopy Gas Detection Technology for High Voltage Cable Joint

Gas detection technology is currently receiving significant attention in the field of cable condition diagnosis research. Photoacoustic spectroscopy detection technology is an important method to achieve high-efficiency and high-precision measurement of trace gas concentration, because of its advantages of fast response, high sensitivity and good selectivity. In this paper, the principle of measuring gas concentration using photoacoustic spectroscopy technology is introduced. Then, different concentration standard gas inspection platforms and 110 kV cable intermediate joint discharge experimental platforms are built. The developed photoacoustic spectroscopy detection device is used for gas detection under discharge defects, and compared with gas chromatography detection data. The results show that the developed photoacoustic spectroscopy detection device has the detection capability for seven gases, and it can effectively perceive characteristic gases change during the development of partial discharge. The application of photoacoustic spectroscopy detection method in the diagnosis of high-voltage cable joint has reliability and practical value, which can provide a new technological path for intelligent and online cable status monitoring.