基于散射中心的风电机叶片散射电场求解  

Scattering Electric Field Solution of Wind Turbine Blade Based on Scattering Center

作　　者：唐波[1,2] 刘钢 蔡智勇 谢黄海 TANG Bo;LIU Gang;CAI Zhi-yong;XIE Huang-hai(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Engineering Technology Research Center for Power Transmission Line,China Three Gorges University,Yichang 443002,China;Starlisten Power Tech Co.,Ltd.,Fuzhou 350019,China)

机构地区：[1]三峡大学电气与新能源学院,宜昌443002 [2]三峡大学湖北省输电线路工程技术研究中心,宜昌443002 [3]福建智达力胜电子科技有限公司,福州350019

出　　处：《微波学报》2020年第6期1-7,共7页Journal of Microwaves

基　　金：国家自然科学基金(51977121)。

摘　　要：为降低雷达系统的数据处理量及实现风电机实时目标特征识别,必须寻求风电机叶片散射电场的快速求解方法。针对传统电磁求解算法需处理巨量风电机叶片散射电场数据的问题,突破传统以超大电尺寸目标实体为基本单元进行广域空间电磁散射积分计算的思想,提出了一种基于散射中心的风电机叶片散射电场求解方法。基于非衰减指数和散射中心模型,通过距离-多普勒算法构建风电机叶片的雷达逆合成孔径图像,采用CLEAN算法并结合相关系数提取风电机叶片的散射中心参数集,最终以散射中心产生的散射电场数据等效替代叶片本体的全部散射数据,实现了叶片散射电场的快速求解。以Vestas V82-1.65MW型风电机为例,以矩量法计算结果为基准,文中所提方法计算准确度为93.20%,数据的压缩比达76.81,计算量的数量级比矩量法降低了106。In order to reduce the data processing of radar system and realize the real-time target recognition of wind turbines,it is necessary to find a fast solution to the scattering electric field of wind turbine blades.Aiming at the problem that the traditional electromagnetic solution algorithm needs to deal with a large amount of scattering electric field data of wind turbine blades,this paper breaks through the traditional idea of calculating electromagnetic scattering integrals in a wide area with a super-large-sized target entity as the basic unit,a method for solving the scattering electric field of a wind turbine is proposed.Based on the Undamped Exponentials(UDE)scattering center model,the Inverse Synthetic Aperture Radar(ISAR)image of wind turbine blade is constructed by Range-Doppler(R-D)algorithm.Then,using CLEAN algorithm and correlation coefficient to extract scattering center parameter set of wind turbine blade.Finally,the scattering electric field data of the scattering center is used to replace all the scattering data of the blade,and the fast solution of the scattering electric field is realized.Taking Vestas V82-1.65 MW wind turbine as an example,based on the results of the moment method,the accuracy of the proposed method is 93.20%,the compression ratio of data is 76.81,and the calculation amount is 10~6 times lower than that of the moment method.

关 键 词：风电机叶片 散射电场 散射中心 雷达逆合成孔径图像 CLEAN算法 快速求解 

分 类 号：TN957.52[电子电信—信号与信息处理] TM315[电子电信—信息与通信工程]