A Study on Aging Characteristics of Silicone Oil in HV Oil-filled Cable Termination Based on Infrared Thermal Imaging Test

Abstract

In order to assess the aging characteristics of Silicone oil in the high voltage oil-filled cable termination after being operated 12 years, the silicone oil in service were studied using the infrared imaging detection, Fourier infrared spectrum analysis, and dielectric properties and micro water content test. The relationship between the infrared thermal imaging temperature and the physical and chemical properties was considered. The results indicate that, the operating temperature of silicone oil within the terminal based on the infrared thermal imaging testing can be characterization of silicone oil aging state. The aging characteristic peak of Silicone oil is P-H key stretching vibration peak, which is near 2360cm- 1, Si-CH3, -CH3 and Si-O-Si keys have no influence of before and after aging. In addition, the aging properties of silicone oil can be reviewed by the change of the dielectric properties, and the decline of the dielectric properties is caused by the aging and water content of materials. The results will be helpful for research of silicone oil aging and optimization design of anti-aging, serving as references for the manufacture, design, and operation.