Analysis on Lightning Strike Breaking Defects of 500kV Yangdong Line II Optical Cable
Abstract
The 500kV Yangdong Line II starts at Shanxi Yangcheng Power Plant and ends at Shandong Dongming Switch Station. It was completed and put into operation in May 2000, with a total length of 246.465 km. In this paper, through the field investigation and weather operation statistics, as well as the metal micro-analysis of the broken strand OPGW sample, it is concluded that the root cause of the broken strand is that the continuous current discharge process of the lightning channel can keep the arc root for a long time, which may cause ablation on the surface and even the inside of the single stranded wire. This paper also put forward measures to prevent such failures.
- Publication:
-
Journal of Physics Conference Series
- Pub Date:
- April 2021
- DOI:
- 10.1088/1742-6596/1865/2/022030
- Bibcode:
- 2021JPhCS1865b2030Y