Online Monitoring Research of Composite Insulator Based on Fibre Bragg Grating Sensor

Composite insulator has good insulation properties and mechanical properties. But under long-term electrical load and exposed to the sun and rain, its organic materials have aging problem, it is essential to test its operational state online. In this paper, the operational state of composite insulator were online detected by Fibre Bragg Grating (FBG) Sensor.During the process of making composite insulator, FBG sensor was embedded in this study. Firstly, composite insulators with FBG sensor exposed to accelerated aging, then artificial flashover imposed on composite insulator, the temperature of composite insulator were detected by FBG sensor, and the temperature field of pollution flashover was drawn. Test results indicate that the area where the flashover occured had high temperature, the silicone rubber surface significantly become black and hard, and had many small cracks, the hydrophobic of composite insulator basically loss. Studies show that FBG sensor has broad application prospects on online detection of composite insulator.