基于改进矩量法的风电机无源干扰快速计算  

Fast Calculation of Reradiation Interference of Wind Turbine Based on Improved Method of Moments

作　　者：黄力 陈新宇[2] 唐波 唐嘉晖 廖梓榕[2] 刘鹏 HUANG Li;CHEN Xinyu;TANG Bo;TANG Jiahui;LIAO Zirong;LIU Peng(Hubei Provincial Engineering Technology Research Center for Power Transmission Line,Yichang 443002,China;College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China)

机构地区：[1]湖北省输电线路工程技术研究中心,宜昌443002 [2]三峡大学电气与新能源学院,宜昌443002

出　　处：《高电压技术》2024年第2期737-748,I0027,共13页High Voltage Engineering

基　　金：国家自然科学基金(51977121);清华大学国家重点实验室开放基金(SKLD21KZ03)。

摘　　要：准确快速计算风电机的散射电场,是解决风电机无源干扰的基本前提。采用传统矩量法求解电大尺寸风电机散射电场时,需要极为庞大的计算资源导致难以求解。为此,考虑风电机工作时叶片的周期对称性以及风电机叶片大曲率、复杂的异形曲面,改进了传统矩量法中求解风电机无源干扰的面元剖分方法,引入基于曲面三角面元的矩量法基函数,并且利用叶片结构的对称性简化阻抗矩阵填充过程,准确快速计算出了风电机表面感应电流产生的散射电场,实现了风电机无源干扰的快速计算。为验证所提方法的正确性及有效性,开展了基于电波暗室风电机缩比模型实验,结果表明,该方法计算的结果与实验测量结果较为一致。以实际金风GW82/1500型风电机为例,将所提方法计算的不同方位角下风电机叶片无源干扰水平与传统矩量法相比,表明该方法与其吻合良好,所提方法矩阵元素计算内存减少了34.64倍,矩阵元素求解效率提高了37.95倍。为后续广域空间下风电场中大规模风电机阵列动态电磁散射理论研究奠定了理论与技术基础。For the purpose of resolving the reradiation interference of a wind turbine,accurate and quick calculation of the scattered electric field of a wind turbine blade is a fundamental requirement.In order to solve the distributed electric field of electricity large size of wind turbine using the conventional method of moments,enormous computational resources are needed,which makes the problem difficult to solve.In this study,we improve the surface element dissection method of the conventional method of moments to solve the reradiation interference of wind turbine.We also introduce the basis function of the method of moments based on the surface triangular surface element,and use the periodic symmetry of the blade to simplify the impedance matrix filling procedure.The method is used to determine the scattered electric field in-duced by the surface induction current of a wind turbine.It is possible to quickly calculate the reradiation interference of wind turbine.In order to confirm the accuracy and efficiency of the method proposed in this paper,experiments were car-ried out based on the wind turbine scaling model of anechoic chamber.The findings reveal that the results calculated using the method in this paper are in good agreement with the experimental measurements.When the reradiation interfer-ence level of a wind turbine blade is computed using the suggested method and the conventional method of moments at various azimuth angles,it is demonstrated that the methods accord well.The computing memory of matrix elements in the proposed method is reduced by 34.64 times,and the solving efficiency of matrix elements is increased by 37.95 times.The proposed method can provide theoretical and technical foundations for the further theoretical investigation of the dy-namic electromagnetic scattering from massive wind turbine arrays in wide space.

关 键 词：叶片对称结构 无源干扰 电磁散射 矩量法 分块循环矩阵 快速计算 

分 类 号：TM315[电气工程—电机]