太原理工大学学报2017，Vol.48Issue(6)：939-945,7.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.06.011
大地背景下风电机雷达回波信号的仿真与分析
Simulation and Analysis of Radar Echo Signals of Wind Turbine in the Presence of Ground
摘要
Abstract
Based on conventional wind turbine point-scattering model,an infinite well-conduc-tive ground model taking angle into account was established.Then,according to the multipath effect,four radar electromagnetic wave propagation paths amony radar,wind turbine and ground were specified and the solving formulas of the radar echoes of wind turbine in the presence of ground were derived by using image theory.The mathematical method of short-time Fourier transform (STFT)was used to get the time-frequency diagram of echoes.The results show that the scattering effect of ground on radar electromagnetic wave results in more complex composition of echoes,which leads to an increase in the number of Doppler flashings,and the tilt of ground results in the change of the maximum Doppler frequency of echoes.Therefore,it is recommended that the influence of ground must be considered in the study of the echoes of wind turbine.关键词
风电机/雷达回波/大地/传播路径/短时傅里叶变换/多普勒特性Key words
wind turbine/radar echo/ground/propagation path/short-time Fourier trans-form/Doppler characteristic分类
信息技术与安全科学引用本文复制引用
唐波,邹芳,孙子昂,黄汉生,叶莉..大地背景下风电机雷达回波信号的仿真与分析[J].太原理工大学学报,2017,48(6):939-945,7.基金项目
电网环境保护国家重点实验室开放基金资助项目(GYW51201700590) （GYW51201700590）
国家电网公司科技项目(GY71-16-011) （GY71-16-011）
