Based on AC and DC Coupling of the DC wall bushing electric field analysis

Abstract

Insulation parts exist in dc wall bushing. During normal operation, insulation parts through the constant current conduction cannot as ideal insulator, so can't simply calculate the electric field in electrostatic field theory, otherwise cause calculation error, and even made bushing structure design errors. In order to study the ac and dc field different influence on bushing electric field. The calculation methods of this paper is based on ac and dc coupling method. Firstly the validation model of ac and dc electric field was calculated, and the electric field and voltage of ac and dc were compared. And then, a dc wall bushing of dc and ac electric field are analyzed, and through the insulated parts of ac and dc electric field contrast to verify the above problems.