Research on Application of GIS UHF Intelligent Sensor

Insulation defect is the main defect type of metal- enclosed gas insulated switch gear (GIS). In order to solve the problem of large workload and high cost in the deployment of traditional local on-line sensing network of GIS equipment. Based on the UHF monitoring method of GIS partial discharge, this paper has designed the wireless communication and low-power UHF smart sensor. After installing and running the GIS UHF intelligent partial discharge monitoring system on site, it is found that an abnormal UHF signal of a 500kV GIS equipment. It has been determined the local discharge source from the GIS equipment after on-site fault analysis and defect location. Which has verified that the GIS UHF smart sensor can effectively detect the internal insulation defects of the GIS equipment and realize the early warning of the insulation defects. It is of great significance to provide the reliability and safety of the operation of GIS equipment. The GIS UHF intelligent sensor monitoring system can be promoted and applied in the construction of smart substations.