Title :
Calculation of electric field and voltage distribution along glass insulator string and optimum design of its grading rings for 1000kV a.c. UHV transmission lines
Author :
Zhao, Yanzhen ; Li, Hualiang ; Ma, Xikui
Author_Institution :
Sch. of Electr. Eng., Xi´´an Jiaotong Univ., Xi´´an
Abstract :
Three-dimensional finite element method has been used to calculate the electric field and voltage distribution along glass insulator string for 1000 kV a.c. UHV transmission lines. Compared with the test results, it is verified that the calculation results are accurate. Various parametric designs of the grading rings of the glass insulator string have been analyzed. Based on the designs, the orthogonal experimental method has been employed to propose several optimum designs of the grading ring for reducing voltage distribution ratio along the glass insulator string. The optimization of grading rings indicates that the grading effect is preferable when tube diameter r equals to 60 mm, ring diameter R 550 mm, height H 350 mm and the number of insulators n 52.
Keywords :
electric fields; insulators; power transmission lines; voltage distribution; ac UHV transmission lines; electric fields; glass insulator string; size 60 mm; three-dimensional finite element method; voltage 1000 kV; voltage distribution; voltage distribution ratio; Breakdown voltage; Capacitance; Corona; Dielectrics and electrical insulation; Finite element methods; Glass; Iron; Poles and towers; Testing; Transmission lines;
Conference_Titel :
Automation Congress, 2008. WAC 2008. World
Conference_Location :
Hawaii, HI
Print_ISBN :
978-1-889335-38-4
Electronic_ISBN :
978-1-889335-37-7
