Title :
A calculation method and some features of transient field under polarity reversal voltage in HVDC insulation
Author :
Wen, K.C. ; Zhou, Y.B. ; Fu, J. ; Jin, T.
Author_Institution :
Electr. Power Testing & Res. Inst. of Central China, Wuhan, China
fDate :
1/1/1993 12:00:00 AM
Abstract :
Mathematical equations are derived for the transient electric field in insulation media with permittivity and resistivity during boundary excitation due to changing from one steady state to another, such as a polarity reversal voltage imposed on the insulation of HVDC apparatus. The equations are solved by the finite element method, and a program for calculating the transient field is developed. Calculated results of some illustrative examples, including a typical bushing barrier system of power converter transformers, verify the method. Some distinguishing features of the transient field are discussed
Keywords :
bushings; electric breakdown; electromagnetic field theory; finite element analysis; power convertors; power transformers; transformer insulation; transients; EM field theory; FEM; HVDC insulation; boundary excitation; bushing barrier system; electric breakdown; finite element method; permittivity; polarity reversal voltage; power converter transformers; resistivity; transient electric field; Conductivity; Dielectrics and electrical insulation; Equations; HVDC transmission; Insulation testing; Insulators; Permittivity; Power transformer insulation; Stress; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
