Optimization of corona ring design for a 400KV non-ceramic insulator

In this paper, a corona ring design optimization for a 400kV non-ceramic insulator was investigated. Two parameters were changed during the study which are: the ring diameter (R) and the diameter of the ring tube (r). In this study, with the aid of a developed mathematical model the maximum electric field curves were recreated and an estimated electric field equation in terms of r and R while fixing H was found. Finally, using the estimated equation, a non-linear optimization technique was applied. The solution for this optimization problem gives the optimal dimensions of r and R as well as the ratio of R/r which will reduce the electric field value most effectively for a given constant cost.