Corona Ring Optimization for Different Cases of Polymer Insulators Based on its Size and Distance

This paper describes the impact of the distance and the size of the corona ring, on the magnitude anddistribution of electrical potential across the polymer insulators. The procedure is based on finiteelement method numerical analysis and stochastic optimization algorithm of differential evolution(DE). The optimal selection of corona ring has a significant impact on the control of potential and,consequently, on dielectric strengths, both inside and outside the insulator. This method is used foroptimized determining of the size and the distance of corona ring from polymer insulators in existingstructures.