玉门风电机组雷电致灾机理与接地探讨  

Probe into Lightning Stroke Mechanism and Grounding Way of Wind Turbines in Yumen

作　　者：陈勇伟[1] 王琦[1] 王汉堃[2] 马登陆 马剑[1] 文兴[1] 郑涛[1] 

机构地区：[1]甘肃省防雷中心,甘肃兰州730020 [2]内蒙古雷电预警防护中心,内蒙古呼和浩特010051

出　　处：《陕西电力》2014年第9期88-92,共5页Shanxi Electric Power

摘　　要：雷击是影响风电机组乃至整个风电系统安全运行的主要因素之一,风电机组的防雷技术研究,对保护风电系统的安全运行具有重要意义。针对玉门地区的气候环境条件与高土壤电阻率特点,结合实际施工经验,对风力发电机组的雷击致灾机理、防护措施、接地方案设计与施工进行了全面的阐述。最后得出:(1)风电机组的雷击致灾机理主要与峰值电流I_m、转移电荷Q、雷电流波头陡度di/dt等参数密切相关;(2)风电机组的雷电防护首先应对防雷区(LPZ)进行划分,并加强控制与信息系统的过电压防护;(3)给出了高土壤电阻率地区电解离子接地极接地电阻的计算方法。同时接地设计与施工应充分考虑地网的稳定性与持久性。Lightning stroke is one of the most serious threats to wind power system; it can influence the normal operation of the wind power system and even destroy the system. So safeguards against the lightning stroke for wind turbines are very important. Combining practical construction experience, the paper studies the mechanisms of the lighting stroke, lightning-proof measures and the design and construction of grounding way according to the climate conditions and high soil resistivity characteristics in Yumen. It is found that the lightning stroke mechanism of the wind turbines is closely related to some parameters such as peak current Im , transfer charge Q and the wave gradient of lightning current di/dt. Besides, the wind power system should be divided into the zones of different levels, and control and information systems deserve the specific protection against over-voltage. Finally, some kinds of calculation methods are provided for the grounding resistance of electrolytic ion grounding electrode in the high soil resistivity area, in the meantime stability and durability should be taken into consideration in the process of designing the grounding grid.

关 键 词：风电机组 雷电 致灾机理 接地 

分 类 号：TM865[电气工程—高电压与绝缘技术]