Computing of electric field of skew conductors with various shapes of cross sections

摘要

In high voltage equipment, various arrangements of electrodes, which can have various shapes, are often used. Electrical insulation can be properly designed, and the best position can be chosen only if the electric field around the electrodes can be analysed. Skew conductors are those in arbitrary positions from which “special” positions (parallel, coaxial, eccentric, etc.) can be obtained. Therefore, equations for computing electric fields of skew conductors can be used for various concrete arrangements of conductors. In solving the fields in three dimensional regions by finite element models or finite difference methods, the number of equations is very large. Using a method of secondary sources, charge density on the conductors (i.e. in two dimensional regions) is calculated so the number of equations is reduced (1). From the known charge density, potential and intensity of the electric field at any point can be computed.