山区风力发电机组雷击风险评估方法  

A method of lightning risk assessment for wind turbines in mountainous areas

作　　者：张博 孙通 聂家谊 张石 夏晖 霍焕杰 ZHANG Bo;SUN Tong;NIE Jiayi;ZHANG Shi;XIA Hui;HUO Huanjie(Longyuan(Beijing) Wind Power Engineering Technology Co., Ltd., Beijing 100081, China;School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]龙源(北京)风电工程技术有限公司,北京100081 [2]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2022年第2期186-191,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金联合基金资助项目(JZ2018GJLH0566)。

摘　　要：位于地形复杂山区的风力发电机组时常遭受雷击,由此导致的停机时间和叶片损坏带来的经济损失较大。文章提出一种山区风力发电机组的雷击风险评估方法,该方法基于自洽式先导发展模型(self-consistent leader inception and propagation model,SLIM),考虑风力发电机附近复杂地形对空间电场畸变的影响,分析不同回击电流幅值、地形结构对雷击截收区域的影响,计算得到单台风力发电机在复杂地形下的雷击截收区域,结合多风机屏蔽效应和风机所在地的地闪密度,得到风力发电机年均遭受雷击次数来表征风机的雷击风险。结果表明:风机雷击截收区域随风机所处地形高度和地面倾角的增加而增加,地形高度对风机雷击截收区域的影响程度最大,40 m地形高度的增加会使风机遭受雷击的次数增加10%以上;当多台风机雷击截收区域有交叠时,雷击截收区域较低的风机雷击风险会有所降低。Wind turbines erected in mountainous areas often suffer from lightning strikes,resulting in large economic losses caused by downtime and blade damage.This paper designs a lightning strike risk assessment method for wind turbines in mountainous areas,which is able to take into account the complex terrain and the lightning current.The method based on self-consistent leader inception and propagation model(SLIM)is applied to analyzing the impact of the intercepted current on the structure of different areas.It has provided the annual lightning strike number of wind turbines by calculating the lightning collection area of single wind turbine in complex terrain and considering the lightning shielding effect and the ground flash.The results show that the lightning collection area of the wind turbine increases with the increase of the terrain height and the ground angle,the terrain height has the greatest influence on the lightning collection area of the wind turbine,and the increase of 40 m terrain height will increase the number of lightning strikes of the wind turbine by more than 10%.When multiple wind turbines overlap in the lightning collection area,the risk of lightning strike will be reduced for the wind turbines with lower lightning collection area.

关 键 词：山区风力发电机 自洽式先导发展模型(SLIM) 雷击截收面积 雷电屏蔽效应 

分 类 号：TM614[电气工程—电力系统及自动化]