Title :
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
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;
Conference_Titel :
Properties and Applications of Dielectric Materials (ICPADM), 2012 IEEE 10th International Conference on the
Conference_Location :
Bangalore
Print_ISBN :
978-1-4673-2852-4
DOI :
10.1109/ICPADM.2012.6318929
