Impact of Surface Roughness on Corona Discharge for 30-year Operating Conductors in 500-kV ac Power Transmission Line

Author

Bian, Xingming ; Chen, Lan ; Yu, Deming ; Wang, Liming ; Guan, Zhicheng

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Shenzhen, China

Volume

27

Issue

3

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1693

Lastpage

1695

Abstract

An investigation into the effect of surface roughness on corona discharge for a 30-year operating conductor in the first 500-kV transmission line in China is presented. Many substances were found to adhere to the conductor surface. Corrosion and deposits had rendered the operated conductor surfaces much rougher than those of the new one. The results show that surface roughness has a significant impact on corona discharge, and the corona inception voltage of the operated conductor would be reduced while the audible and radio noise would be increased.

Keywords

conductors (electric); corona; power transmission lines; surface roughness; China; ac power transmission line; corona discharge; corona inception voltage; corrosion; operating conductors; surface roughness; time 30 year; voltage 500 kV; Conductors; Corona; Discharges; Rough surfaces; Surface discharges; Surface morphology; Surface roughness; Audible noise; conductor aging; corona cage; corona discharge; radio noise; surface roughness; ultraviolet;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2012.2190465

Filename

6185711