Electric field distribution computation and corona suspension for rigid jumper in UHV double circuit tension tower

摘要

Owing to its complex structure, high electric field strength, the rigid jumper on 1000kV double circuit tension tower is prone to corona that needs suppression and much more consideration. Using three dimensional finite element method software ANSYS, the electric field distribution on the surface of rigid jumper with aluminum tube structure was calculated when considering the effect of tower, fittings, insulator strings and phase influence. In order to study the several influencing factors, based on the original calculation model, 5 scenarios were calculated, and the influencing factors of electric field distribution on jumper were researched and compared. Effects of sag height, angle of tension tower and diameter of jumper were studied in detail. Based on the results, the influence from phase is much more significantly than tower, ground and among circuit; the regularity of the electric field distribution on the surface of rigid jumper with different sag heights, angles of tension tower and diameters of jumper was obtained; rigid jumper should choose JL/G3A-900/40 extended diameter conductor and minimize the sag height in actual installation. The research achievements will be used in actual project, it is applicable not only for corona suppression, but also for the selection of conductor and the arrangement of jumper.