Abstract
The accident happened on cable termination often starts from partial discharge which will cause electrical aging of insulating silicone oil. Therefore, the research on the electrical aging characteristics and products of the insulating silicone oil under partial discharge is significant. In this paper, a dielectric barrier discharge with pin plate electrodes is used to simulate partial discharges under real conditions. The electrical characteristics of the silicone oil and the products formed before and after the discharge are analyzed. It is found that prolonged partial discharges will significantly alter the dielectric properties of insulating silicone oils. The dielectric loss factor and the relative permittivity will increase and the volume resistivity will be greatly reduced. At the same time, gel-like substances polymerized by Si–O bonds and gases such as hydrogen and carbon monoxide were produced. Finally, changes at the molecular level were analyzed on the basis of the products and their formation and electrical aging properties were explained. In addition, the gas product characteristics were analyzed using the three-ratio method.
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Chen, Z., Qiu, Z., Fu, Y., Zhang, R. (2021). Study on Aging Characteristics and Products of Liquid Insulating Medium Under Partial Discharge. In: Chen, W., Yang, Q., Wang, L., Liu, D., Han, X., Meng, G. (eds) The Proceedings of the 9th Frontier Academic Forum of Electrical Engineering. Lecture Notes in Electrical Engineering, vol 743. Springer, Singapore. https://doi.org/10.1007/978-981-33-6609-1_24
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DOI: https://doi.org/10.1007/978-981-33-6609-1_24
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