直接雷击时风电机组的暂态响应分析

发布时间：2018-05-18 00:35

本文选题：风电机组 + 雷击　；参考：《太阳能学报》2017年10期

【摘要】：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。
[Abstract]:Wind turbine is a high structure on the ground which is vulnerable to lightning strike. When lightning strikes the unit, the lightning current is usually transmitted from the blade, the engine room motion contact area, the tower tube and the earthing device. In view of the lightning current path, the circuit parameter algorithms of the two main current passage parts, the blade and the tower tube, are first given, and the circuit parameters of the engine room moving contact part and the grounding device are simplified. On this basis, the lightning transient equivalent circuit model of the whole unit is established. Then the transient response is measured by using the reduced scale test model, and the results are compared with the results of the model calculation to verify the feasibility of the circuit model. The proposed circuit model is applied to the lightning transient analysis of a domestic 2.5 MW unit. After a comparative investigation of the lightning transient overvoltage rise of the unit under the single, double and three blade lightning stroke modes, it is found that, MV-grade overvoltage is produced in every lightning stroke mode of wind turbine, and the tip part of the blade is even more than 10 MV when the three blades are struck by lightning.
【作者单位】：北京交通大学电气工程学院;
【基金】：国家自然科学基金(51420105011)
【分类号】：TM315

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