中国电机工程学报2016，Vol.36Issue(21)：5975-5982,8.DOI:10.13334/j.0258-8013.pcsee.152350
风机叶片雷击上行先导的起始物理机制与临界长度判据
Inception Mechanism of Lightning Upward Leader From the Wind Turbine Blade and a Proposed Critical Length Criterion
马宇飞 1张黎 2闫江燕 1郭子炘 1李庆民 1方致阳 3Siew W H4
作者信息
- 1. 新能源电力系统国家重点实验室 华北电力大学，北京市昌平区 102206
- 2. 山东大学电气工程学院，山东省济南市 250061
- 3. 中材科技风电叶片股份有限公司，北京市朝阳区 100092
- 4. University ofStrathclyde，Glasgow UK G1 1XW
- 折叠
摘要
Abstract
As a key physical process of lightning protection on wind turbine blades, the inception mechanism and criterion of the upward leader need further. A model of line charge with point charge at the head was used to simulate charge distribution of lightning leader. A curve about surface charge density on blade was plotted after considering the movement, diffusion and neutralization of the space charges, and positive charges was concentrated distribution at the tip of blade. The potential nearby blade was simulated by COMSOL, and it was distorted obviously under the influence of charges in lightning leader and that on the surface of blade. The paper proposed a critical length inception criterion for upward leader based on a simplified model of the development of upward leader. The kernel of the criterion is ‘there exists a certain zone above blade tip where the background potential is larger than that in streamer, and a stable upward leader will incept if the length of this zone is larger than a critical length’. Lightning parameters and blade parameters, such as amplitude of lightning current, lateral distance, length of blade and radius of receptor, have no effect on the critical length. The critical length decreases with the increase of the relative density and humidity of air, and it increases with the increase of altitude. Thefeasibility of the proposed criterion is verified by the observation results of long air gap discharge for the vertical conductors under laboratory conditions.关键词
风机叶片/有限元/上行先导起始/临界长度判据/电荷分布/空间电位Key words
Wind turbine/FEM/upward leader inception/critical length criterion/distribution of charge/space potential分类
信息技术与安全科学引用本文复制引用
马宇飞,张黎,闫江燕,郭子炘,李庆民,方致阳,Siew W H..风机叶片雷击上行先导的起始物理机制与临界长度判据[J].中国电机工程学报,2016,36(21):5975-5982,8.
