Surface Charge Property of SiR/SiC Composites with Field-Dependent Conductivity

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Copyright: 2020
Pages: 36
Source title: Electrical Insulation Breakdown and Its Theory, Process, and Prevention: Emerging Research and Opportunities
Source Author(s)/Editor(s): Boxue Du (Tianjin University, China)
DOI: 10.4018/978-1-5225-8885-6.ch008

Keywords: Electrical Engineering / Engineering Science Reference / Science & Engineering

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Abstract

An electrical field distorted by the complicated cable accessory structure and non-uniform temperature distribution is a significant threat to high voltage direct current (HVDC) cable. Thus, the field grading material (FGM) with nonlinear conductivity can uniform local field receives attention. This chapter focuses on the surface charge property of SiR/SiC composites effected by temperature. Field strength and SiC content have a positive effect on the increase in conductivity. When the temperature increases, the threshold field decreases. At high SiC content, this phenomenon is more obvious. The influence of temperature is considered under DC voltage and impulse superimposed DC voltage.

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Surface Charge Property of SiR/SiC Composites with Field-Dependent Conductivity

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