The application of multi-sensor technique in switchgear partial discharge precise location

This paper describes the basic theory and detection methods of UHF, ultrasonic and high-frequency on-site detection. With the example of failed switchgear on-site detection in 35kV substation, this paper analyzes the application of multi-sensor partial discharge detection technique in the area of switchgear insulation defects detection. Combined with the on-site analysis and disassembled maintenance, the paper verifies the switchgear detection and location´s feasibility and accuracy of multi-sensors technique.