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风电机组是地面上易受雷击的高结构体.当雷击机组时,雷电流通常从桨叶、机舱运动接触部位、塔筒和接地装置传输入地.针对这条雷电流路径,首先给出桨叶和塔筒这两个主要通流部分的电路参数算法,并对机舱运动接触部位和接地装置的电路参数进行简化处理,在此基础上建立整个机组的雷电暂态等值电路模型.再利用缩小比例试验模型进行暂态响应测量,对比测量结果与模型计算结果,以校验电路模型的可行性.将所建电路模型运用于实际国产2.5 MW机组的雷电暂态分析,在对比考察雷击单、双和三桨叶方式下机组上雷电暂态过电压升高情况后发现,每种雷击方式在风电机组各处都会产生MV级过电压,三桨叶雷击时叶尖部分甚至超过10 MV.“,”Wind turbines are vulnerable to lightning strike due to their tall structure. When the wind turbines are struck by lightning,the lightning currents often flow through the blades,nacelle,tower,grounding system,and finally dissipate into the ground. Based on the lightning current path,firstly,the circuit parameter algorithm of the two main flow passages of the blade and the tower is given,and the circuit parameters of the contact area and the grounding device are simplified,on this basis,the lightning transient equivalent circuit model of the entire unit is established. The reduced-scale experiment model is used to carry out the transient response measurement,test results are compared with the calculated one for checking the validity of the circuit model. The circuit model is used for lightning transient analysis of domestic 2.5 MW wind turbine. Each lightning type will produce MV-level over-voltage on whole wind turbine,the tip part of three blades even over 10 MV after comparing the lightning transient over-voltage rise on whole wind turbine for the lightning strike single,double and three blades.