Surface coating affecting charge distribution and flashover voltage of cone-type insulator under DC stress

2019 ◽  
Vol 26 (3) ◽  
pp. 706-713 ◽  
Author(s):  
B. X. Du ◽  
H. C. Liang ◽  
J. Li
Keyword(s):  
Charge Distribution ◽  
Surface Coating ◽  
Cone Type ◽  
Flashover Voltage ◽  
Dc Stress

Flashover and Surface Charge in GIL Insulator

2020 ◽  
pp. 46-72
Keyword(s):  
Theoretical Analysis ◽  
Electric Field ◽  
Energy Loss ◽  
Surface Charge ◽  
Charge Distribution ◽  
Coating Thickness ◽  
Cone Type ◽  
Surface Charge Distribution ◽  
Flashover Voltage ◽  
Peak Field

Many works have been studies in order to improve flashover voltage in GIL insulator. Under DC, the insulator electric field is decided by the conductivity and surface charge distribution. This chapter takes cone-type insulator as research object and then finds the characteristics of flashover, surface charge accumulation, and the interface electric field regulation (IER) of epoxy (EP)-/graphene (GR)-coated insulator. Theoretical analysis demonstrates that the uniform surface charge of monopole is conducive by reduce peak field and flashover voltage. Among them, that of 0.1% EP/GR possesses the highest flashover voltage. With the SiC content and coating thickness enhancement of IER insulator, the electric field regulation of EP/SiC-coated insulator becomes notable, due to energy loss and increasing leakage current. The results show that insulator coated by EP/SiC can reach higher flashover voltage than uncoated insulator and enhanced SiC content contributes to improve the flashover voltage.

scholarly journals Space Charge Distribution for Various Glass Materials under DC Stress.

2003 ◽  
Vol 123 (1) ◽  
pp. 62-69 ◽  
Author(s):  
Hiroaki Miyake ◽  
Yuuki Ito ◽  
Yasuhiro Tanaka ◽  
Tatsuo Takada ◽  
Masahiro Hanai
Keyword(s):  
Space Charge ◽  
Charge Distribution ◽  
Space Charge Distribution ◽  
Dc Stress
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