电瓷避雷器Issue(6)：73-84,12.DOI:10.16188/j.isa.1003-8337.2024.06.009
考虑极性效应的风机下行雷击风险的定量表征
Quantitative Characteristics of Downward Lightning Risk Associated with Wind Turbine Considering Polarity Effect
摘要
Abstract
Accurate evaluation of the annual lightning flash number to a wind turbine is the premise of reasonable design and optimization for lightning protection system of wind turbines.But the method to as-sess the lightning risk of wind turbine recommended by IEC only consider the influence of the object height,which is not associated with the actual lightning attachment process.In addition,most of the lightning protection studies systems are based on downward negative lightning,and is short of analysis of the downward positive lightning.Based on an improved stochastic lightning leader model,the influence of lightning current amplitude,wind turbine height and blade rotation on lightning strike risk is quantitatively analyzed.And then the development and distribution characteristics of positive and negative lightning is firstly discussed in this paper.Finally,a more accurate calculation method of lightning strike risk is pro-posed considering the polarity effect.The results show that the influence of the blade angles on the light-ning risk cannot be ignored when the lightning current is large or the wind turbine is high.Downward nega-tive ground flash has more bifurcation,but its development path and the dispersion of the lightning strike point are small.But downward positive ground flash is difficult to bifurcate,the path is tortuous and scat-tered,and has a large dispersion.According to the verification calculation,the results calculated in this paper are in better agreement with the field observation data than the results of IEC recommended method.关键词
先导随机模型/风机/雷击风险/下行正地闪Key words
stochastic lightning leader model/wind turbine/lightning strike risk/downward positive lightning引用本文复制引用
边晓燕,吴勇,周歧斌,赵信翔,姜睿娇,吕伟涛..考虑极性效应的风机下行雷击风险的定量表征[J].电瓷避雷器,2024,(6):73-84,12.基金项目
国家重点研发计划基金(编号:Grant 2017YFC1501504) （编号:Grant 2017YFC1501504）
灾害天气国家重点实验室开放课题(编号:2021LASW-B06) （编号:2021LASW-B06）
上海市科技计划项目资助(编号:21DZ203900).Project upported by National Key Research and Development Program of China(No.Grant2017 YFC1501504) （编号:21DZ203900）
Open Project of State Key Laboratory of Severe Weather(No.2021LASW-B06) （No.2021LASW-B06）
Shanghai Science and Technology Plan Project(No.21DZ203900). （No.21DZ203900）
