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Proceedings Paper

Characterization of turbulent wake of wind turbine by coherent Doppler lidar
Author(s): Songhua Wu; Jiaping Yin; Bingyi Liu; Jintao Liu; Rongzhong Li; Xitao Wang; Changzhong Feng; Quanfeng Zhuang; Kailin Zhang
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Paper Abstract

The indispensable access to real turbulent wake behavior is provided by the pulsed coherent Doppler Light Detection and Ranging (LIDAR) which operates by transmitting a laser beam and detecting the radiation backscattered by atmospheric aerosol particles. The Doppler shift in the frequency of the backscattered signal is analyzed to obtain the line-of-sight (LOS) velocity component of the air motion. From the LOS velocities the characteristic of the turbulent wake can be deduced. The Coherent Doppler LIDAR (CDL) is based on all-fiber laser technology and fast digital-signal-processing technology. The 1.5 µm eye-safe Doppler LIDAR system has a pulse length of 200ns and a pulse repetition frequency of 10 kHz. The speed measurement range is ±50m/s and the speed measurement uncertainty is 0.3 m/s. The 2-axis beam scanner and detection range of 3000m enable the system to monitor the whole wind farming filed. Because of the all-fiber structure adoption, the system is stable, reliable and high-integrated. The wake vortices of wind turbine blades with different spatial and temporal scales have been observed by LIDAR. In this paper, the authors discuss the possibility of using LIDAR measurements to characterize the complicated wind field, specifically wind velocity deficit and terrain effects.

Paper Details

Date Published: 26 November 2014
PDF: 10 pages
Proc. SPIE 9262, Lidar Remote Sensing for Environmental Monitoring XIV, 92620H (26 November 2014); doi: 10.1117/12.2069566
Show Author Affiliations
Songhua Wu, Ocean Univ. of China (China)
Jiaping Yin, Ocean Univ. of China (China)
Bingyi Liu, Ocean Univ. of China (China)
Jintao Liu, Ocean Univ. of China (China)
Rongzhong Li, Ocean Univ. of China (China)
Xitao Wang, Ocean Univ. of China (China)
Changzhong Feng, Ocean Univ. of China (China)
Quanfeng Zhuang, Ocean Univ. of China (China)
Kailin Zhang, Ocean Univ. of China (China)

Published in SPIE Proceedings Vol. 9262:
Lidar Remote Sensing for Environmental Monitoring XIV
Upendra N. Singh; Kazuhiro Asai, Editor(s)

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