Influence of SiC/Epoxy Coating on Surface Charging Phenomenon at DC Voltage - Part II: Charge Dissipation
Artikel i vetenskaplig tidskrift, 2022

In this paper, the dissipation of pre-deposited surface charges on the SiC/epoxy coated insulator is investigated. Similarly to Part I of this study, the analysis is carried out for the system of a pair of finger-shaped metallic electrodes placed on flat material samples and different types of material pre-charging are considered. Specifically, two cases based on different types of electrode-sample contacts (Case 1 and 2, similar to Part I) are examined as well as surface charging by external corona (Case 3). It is shown that surface charge dissipation in Cases 1 and 2 takes place in two stages whereas three stages in the charge decay process are identified in Case 3. It is shown that the rate of charge dissipation is strongly affected by the increase of the content of SiC filler in the coating material. The experimental results obtained for different Cases are compared and are discussed by employing results of the calculations of the electric field in the experimental setups and surface conductivities and surface trap characteristics obtained in Part I.

Silicon carbide

SiC/epoxy coatings

HVDC

Insulators

surface conductivity

Surface treatment

Surface charging

GIS/GIL

Coatings

Surface charge dissipation

Surface discharges

surface trap

Electrodes

Författare

Zijun Pan

Wuhan University

Cheng Pan

Wuhan University

Ju Tang

Wuhan University

Boli Hu

Wuhan University

Yi Luo

Wuhan University

Yuriy Serdyuk

Chalmers, Elektroteknik, Elkraftteknik

IEEE Transactions on Dielectrics and Electrical Insulation

1070-9878 (ISSN) 15584135 (eISSN)

Vol. 29 4 1343-1352

Styrkeområden

Energi

Ämneskategorier

Materialkemi

Annan kemi

Annan materialteknik

DOI

10.1109/TDEI.2022.3188041

Mer information

Senast uppdaterat

2022-08-07