高电压技术2012，Vol.38Issue(10)：2675-2682,8.
雷击风机时叶片和塔筒对接地装置冲击接地特性的影响
Influence of the Wind Vane Tower Barrel on the Earthing Connection's Impulse Earthing Characteristics in a Lightning Shock
摘要
Abstract
For lack of guidance and standard specifications of the assessment of wind turbines and earthing connection's impulse characteristics,it is necessary to study the impulse earthing characteristics of earthing connection which is of great importance to wind turbines' lightning protection.In real lightning strokes,the process that the surge current goes through the long wind vane tower barrel can be considered as a wave process which may have an influence on the impulse earthing characteristics of the earthing system.Thus,by using moment methods and the inverse Fourier transform,we research the earthing connection's transient ground potential rises(GPR) generated by surge current in different modeling conditions.The modeling conditions include different earth resistance,different grounding system sizes,different surge current waveforms,and whether the wind vane tower barrel is included in the model or not.Calculations on different models are made to get the effects of the wind vane tower barrel on the GPR generated by the surge current in different conditions.We also analyze an impact mechanism of the tower vane barrel by using the wave process theory.Through these calculations and analyses,it is found that,because of the wave process in the tower vane barrel,the real GPR oscillates in the time domain in a lightning stroke,and this oscillation will influence the earthing connection's impulse earthing resistance.关键词
风力发电/波过程/冲击接地电阻/接地技术/矩量法/雷击Key words
wind power generation/wave process/impulse earthing resistance/earthing technique/moment method/lightning stroke分类
信息技术与安全科学引用本文复制引用
张波,薛惠中,张宝全,宗驰,范子超..雷击风机时叶片和塔筒对接地装置冲击接地特性的影响[J].高电压技术,2012,38(10):2675-2682,8.基金项目
国家重点基础研究发展计划（973计划） （）
电力系统及发电设备控制和仿真国家重点实验室基金 （）
