考虑后续雷击的风电机组雷电暂态研究  

Research of Lightning Transient Responses on Wind Turbines During Subsequent Lightning Strike

作　　者：陶世祺 张小青[1] 王耀武 陈士刚 杨俊峰 TAO Shiqi;ZHANG Xiaoqing;WANG Yaowu;CHEN Shigang;YANG Junfeng(School of Electrical Engineering,Beijing Jiaotong University,Haidian District,Beijing 100044,China)

机构地区：[1]北京交通大学电气工程学院

出　　处：《中国电机工程学报》2018年第18期5326-5334,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51420105011);中央高校基本科研业务费专项资金项目(E17JB00180)~~

摘　　要：兆瓦级风电机组由于其高耸的结构和特殊的地理位置,很容易遭受雷击。目前,就风电机组的雷电暂态分析而言,大多数研究工作仅针对于首次雷击暂态响应的计算,缺乏对后续雷击过程的考虑。为了开展更为全面的风电机组雷电暂态分析,建立机组的完整电路模型,推导从桨叶、塔筒、到接地装置的电路参数算法。运用该电路模型对机组进行雷电暂态计算,获得实际兆瓦级机组上的雷电暂态响应。以所获得的暂态电位响应为基础,进一步给出暂态电位幅值沿机组本体分布的曲线。另外,在首次和后续雷击两种情况下,分别对两条电位分布曲线进行分析,同时对此两种雷击条件下的雷电反击距离进行计算和对比。Megawatt wind turbines are easily struck by lightning due to their tall structures and exposed areas. As far as the lightning transient analysis of wind turbines is concerned, the existing works are only confined to the first lightning strike and a study on the transient behavior under the subsequent lightning strike has not been undertaken. In order to perform a more comprehensive transient analysis under the two types of lightning strikes, a complete circuit model was established for wind turbines and an efficient algorithm was also presented to evaluate the equivalent circuit parameters of the blade, tower and grounding system. By using the circuit to carry out the transient calculation, the transient responses were obtained on an actual megawatt wind turbine. On the basis of the potential responses, the back flashover distances inside the tower were further estimated. Then, a contrast analysis was also to assess the difference between the potential distribution curves and back flashover distances under the two types of lightning strikes.

关 键 词：风电机组 首次雷击 后续雷击 等值电路模型 暂态响应 

分 类 号：TM863[电气工程—高电压与绝缘技术]