| Issue |
E3S Web Conf.
Volume 242, 2021
The 7th International Conference on Renewable Energy Technologies (ICRET 2021)
|
|
|---|---|---|
| Article Number | 03009 | |
| Number of page(s) | 5 | |
| Section | Electronics and Electrical Engineering | |
| DOI | https://doi.org/10.1051/e3sconf/202124203009 | |
| Published online | 10 March 2021 | |
Lightning Performance of Unshielded 220kV Transmission Lines Equipped with Metal-oxide Arresters
State Key Laboratory of Disaster Prevention & Reduction for Power GridTransmission & Distribution Equipment, Changsha 410007 China.
* Corresponding author: xiepengkang@126.com
Overhead ground wires have been proved to be effective to protect conductors from direct lightning strikes, but breakouts of ground wires have been frequently reported. In order to prevent ground wire breakout incidents to happen, unshielded 220kV lines equipped with metal oxide arresters (MOAs) whole line have been proposed in this paper. After cancelling ground wire, lightning strike risk of transmission lines becomes much higher. In order to improve the anti-lightning abilities of unshielded transmission lines, it is necessary to obtain the lightning energy absorption ability of these MOAs. In this paper, simulation model of MOA equipped unshielded 220kV transmission line was built, the influences of lightning parameters, striking occurrence point and grounding resistance of transmission tower on the absorbed energy of MOAs were calculated, and the suggested energy absorption ability of MOA was given, which can give references for the improvement of power supply reliability of transmission lines.
© The Authors, published by EDP Sciences, 2021
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