Effects of Nonlinear Conductivity on Charge Trapping and De-trapping Behaviors in Epoxy/SiC Composites under DC Stress

2017 ◽  
Author(s):  
Hucheng Liang ◽  
BOxue Du ◽  
Jin Li ◽  
Zhonglei Li ◽  
Ang Li
Keyword(s):  
Charge Trapping ◽  
Nonlinear Conductivity ◽  
Sic Composites ◽  
Dc Stress

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

2020 ◽  
pp. 219-254
Keyword(s):  
Surface Charge ◽  
Threshold Field ◽  
Accessory Structure ◽  
Nonlinear Conductivity ◽  
Dc Voltage ◽  
High Voltage Direct Current ◽  
Charge Property ◽  
Sic Composites ◽  
Positive Effect ◽  
Surface Charge Property

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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