Study on the Effects of Defects on the AC Corona Characteristics of Stranded Conductors

DOI

10.2991/eeeis-16.2017.37How to use a DOI?

Keywords

Defect; Stranded conductors; Photon number; Corona onset voltage.

Abstract

Defects can come into being on the surface of stranded conductors, which will affect the corona onset voltage (COV) of conductors. To unveil the regularities of defects' impacts on the COVs, a series of AC corona tests of different defective conductors were carried out in a corona cage. Relationships between photon numbers and applied voltages were obtained using an UV imager, and COVs of stranded conductors with different defects were measured through photon number fitting method. Results show that relationships between photon numbers and applied voltages meet quadratic relationships in AC corona process. Different defects have different effects on COVs, among which broken strands influence COVs mostly. As the defect degree deepens, COVs decrease gradually. When the outmost layer's strands are all broken, COV increases rather than decreasing, which results from the increase of equivalent diameter of conductors at the broken points.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Kai He
AU  - Xing-Liang Jiang
AU  - Zhen-Yu Li
PY  - 2016/12
DA  - 2016/12
TI  - Study on the Effects of Defects on the AC Corona Characteristics of Stranded Conductors
BT  - Proceedings of the 2nd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS 2016)
PB  - Atlantis Press
SP  - 282
EP  - 288
SN  - 2352-5401
UR  - https://doi.org/10.2991/eeeis-16.2017.37
DO  - 10.2991/eeeis-16.2017.37
ID  - He2016/12
ER  -