High Voltage Insulating System Design by Application of Electrode and Insulator Contour Optimization

This-paper describes a procedure for HV insulating system design which combines the classical approach of changing the distances between system elements with optimization of their contours. An integral equation technique for solving electric fields, which is improved by cubic spline expansion for surface charge density, is applied in this procedure. In the contour optimization technique an additional step is introduced: smooth approximation of a corrected contour by circular arcs. This step allows a relatively simple geometrical description of a corrected contour. The application of the procedure is illustrated by practical examples.