摘要
风轮机作为高大的运动障碍物,会对气象雷达的工作性能产生较为严重的影响,研究风轮机的电磁散射特性对于识别风电场干扰、评估其对气象雷达的影响具有重大意义。考虑了圆柱叶片介电常数对其雷达散射截面积(RCS)的影响,利用数值拟合的方法实现了不同材料圆柱叶片RCS仿真和解析式的拟合,并对拟合结果进行了验证;其次,考虑了风轮机叶片翼型对其RCS的影响,运用UG软件对某型号风轮机叶片进行了三维建模,对其回波信号进行微动特征分析,并与实测结果进行了对比,证明了该建模方法的正确性;最后利用数值拟合的方法给出了真实叶片RCS在一定范围内的解析计算公式。
As a kind of tall moving obstacle, wind turbines have an inevitable impact on weather radar performance. The analysis of electromagnetic scattering characteristics of wind turbine is significant for the identification of wind farm disturbing and the evaluation of influence on weather radar. In this paper, considering the effect of the dielectric constant for cylindrical blade on the radar cross section （RCS） , an analytical formula of the RCS calculation for cylindrical blade is proposed based on numerical theory, and the results are validated by simulation. Meanwhile, a real blade is modeled by using software UG in consideration of airfoil section. Therefore, the electromagnetic scattering characteristics including RCS and time-frequency domain analysis are established. Simulation results demonstrate the validity of the modelling method in comparison with the measured data. Finally, an analytical formula of real blade＇s RCS is adapted with a certain range.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2017年第11期2626-2633,共8页
Chinese Journal of Scientific Instrument
基金
国家自然基金与民航局联合项目(U1533110)
国家自然基金(61571442)
中央高校基金(3122015D005)项目资助
关键词
风轮机
气象雷达
电磁散射特性
解析公式
叶片建模
wind turbines
weather radar
electromagnetic scattering characteristics
analytical formula
blade modelling
