• Prakash

In power sector industry insulators play a major role especially in high voltage applications. In early day’s porcelain insulators have been widely used in transmission and distribution lines, but now as there is a development in the technology, porcelain insulators are being slowly being replaced by polymeric insulators. The polymeric insulators have many advantages than the ceramic insulators in terms of cost, weight and maintenance but it also has some drawbacks when it is used on high voltage applications. At higher voltages that is beyond 220 kV electric field is non-uniformly distributed along the insulators and the intensity is very high near to the triple junctions, for the insulators at higher voltage electric field is the major area of concern. There are several methodologies are proposed to analyze the electric field along the insulator, to make it more uniform and to reduce the intensity of the field at some points on the insulator both experimentally and numerically of which former method might requiring the number of experimental trials. The advent of super computers makes numerical analyses feasible on any complex geometry model and the overall optimization techniques to control the electrical field become quite easier. However, the main drawbacks in second method of analyses are more computation time and memory, making it desirable to simplify the structure. Hence a methodology based on 2-D (axi-symmetry model of insulator with and without corona ring) for a dimension and location of corona rings is proposed using the trial and error method. Based on the electric field along shed surface and FRP rod of the insulator for different voltage ratings of 200 kV,400 kV and 765 kV the dimension and location of corona rings using are calculated. A suspension type I string assembly is used for this study. The design and simulation is done in 2D- axisymmetric model in COMSOL multiphysics software. The future scope is for II suspension, V string and Y string insulators.

Silicone rubber, suspension, corona rings, Electric field computation, FEM, COMSOL.

"Electric field computation on polymeric insulators", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 12, page no.d162-d167, December-2022, Available :http://www.jetir.org/papers/JETIR2212324.pdf

"Electric field computation on polymeric insulators", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 12, page no. ppd162-d167, December-2022, Available at : http://www.jetir.org/papers/JETIR2212324.pdf