[This article belongs to Volume - 54, Issue - 02]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-26-12-2022-596

Title : EFFECT OF CONDUCTION BAND ON THE PERFORMANCE OF POLLUTED CERAMIC INSULATOR SPECIMENS
Ramakrishna Murthy K1,2* , Pradipkumar Dixit2 , Vinayak V Rao2 , Chandrashekhar Badachi2

Abstract :

Pollution-induced flashover of outdoor ceramic insulators is one of the critical factors which governs power system reliability. Deposition of the air-borne particulates and condensation of vapors on the surface forms layers of pollution which cause degradation in their performance. To mitigate this problem, several techniques such as silicon grease coating, RTV coating, increase in creepage distance, and regular washing of the insulators have been tried with varied success. All these methods are quite expensive and add to the overall cost of power delivery. It is observed that due to the deposition of contaminants on the surface of the ceramic insulators, the field around the insulator becomes highly nonuniform which may lead to flashover. In the present work, a simple and inexpensive method that can increase the pollution withstand capability of the polluted ceramic insulators is proposed. As a part of the proposed method, ceramic specimens were prepared, conduction bands were placed and flashover experiments were conducted with and without conduction bands under clean and polluted conditions. From the test results, it can be concluded that by optimally placing the conduction band on the surface of the ceramic insulators, their pollution withstand capability can be significantly enhanced.