标题：Integrated multiple wave impedance model of offshore wind turbine considering blade rotation angle
作者：Wang, Guozheng ;Zhang, Li ;Zhao, Tong ;Zou, Liang
作者机构：[Wang, Guozheng ;Zhang, Li ;Zhao, Tong ;Zou, Liang ] School of Electrical Engineering, Shandong University, Jinan; 250061, China
会议名称：5th IEEE International Conference on High Voltage Engineering and Application, ICHVE 2016
会议日期：19 September 2016 through 22 September 2016
来源：ICHVE 2016 - 2016 IEEE International Conference on High Voltage Engineering and Application
关键词：ATP-EMTP; grounding resistance; lightning wave process; offshore wind turbine; wave impedance model
摘要：Lightning disaster is one of the main factors threatening the safe and stable operation of wind farms. In order to reduce the lightning failure rate of offshore Wind Turbine (WT), the response patterns and influencing factors of transient overvoltage must be accurately analyzed. First, the method of numerical calculation of electromagnetic field was used to establish a new multi-wave impedance model of offshore WT combined with the marine grounding environment and the effect of blade rotation angle. Then, with ATP-EMTP software, the offshore WT simulation model was established to analyze the effect of lightning transient potential under the various conditions, such as ocean depth, blade length, tower height and rotational position of blade. The wave process theory was adopted to analyze the reasons. It was shown by the simulation that the transient potential of WT appeared obvious oscillation characteristics, and the transient potential oscillation of offshore WT was more severe than onshore WT. According to the study, a method was proposed to accelerate the oscillation attenuation of offshore WT. The results of the study would be a reference basis for lightning protection design of the offshore WT. © 2016 IEEE.