Optimization of grading rings for post insulators used in EHV/UHV transmission system

Author

Gunasekaran, B. ; Nirgude, Pradeep M.

Author_Institution

Central Power Res. Inst., Hyderabad, India

fYear

2012

fDate

24-28 July 2012

Firstpage

1

Lastpage

4

Abstract

This paper describes the evaluation of electric field and potential distribution along Station post insulators of rating 420, 800 and 1200 kV. A number of different corona ring geometries were compared. The effect of changing ring diameter, overall diameter and placement along the insulator were investigated. The results of the simulation studies, carried out to optimize the corona ring geometries that have to be provided at the live end of 1200 kV station post insulators, are presented. The corona onset gradients for the various configurations of the Grading ring were calculated and compared with the maximum gradients obtained in the simulation studies.

Keywords

corona; insulators; EHV-UHV transmission system; corona ring geometries; electric field distribution; grading ring optimization; maximum gradients; overall diameter; potential distribution; ring diameter; station post insulator; voltage 1200 kV; voltage 420 kV; voltage 800 kV; Corona; Insulators; Lead; Optimized production technology; EHV/UHV system; Electric field; Grading ring; Station Post Insulator; Voltage distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials (ICPADM), 2012 IEEE 10th International Conference on the

Conference_Location

Bangalore

ISSN

2160-9225

Print_ISBN

978-1-4673-2852-4

Type

conf

DOI

10.1109/ICPADM.2012.6318929

Filename

6318929