Validation and Measurements of Floating LiDAR for Nearshore Wind Resource Assessment Application

Hsuan, Chung Yao; Tasi, Yuan Shiang; Ke, Jhu Hong; Prahmana, Rico Aditia; Chen, Ko Jen; Lin, Ta Hui

doi:10.1016/j.egypro.2014.12.195

Cited by 19 publications

(16 citation statements)

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“…Coherent Doppler lidars (CDL) are used in applications ranging from basic atmospheric boundary-layer research to model data assimilation (Riishøjgaard et al, 2004;Chai et al, 2004;Newsom and Banta, 2004a, b;Newsom et al, 2005;Weissmann and Cardinali, 2007;Pu et al, 2010) and to wind resource assessment (Pena et al, 2009;Lang and McKeogh, 2011;Koch et al, 2012;Pichugina et al, 2012;Hsuan et al, 2014;Newsom et al, 2015;Newman et al, 2016;Choukulkar et al, 2016). Within the wind energy industry, these instruments are viewed as cost-effective alternatives to instrumented towers for wind resource assessment provided the measurement uncertainties are within acceptable limits.…”

Section: Introductionmentioning

confidence: 99%

Validating precision estimates in horizontal wind measurements from a Doppler lidar

et al. 2017

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Abstract. Results from a recent field campaign are used to assess the accuracy of wind speed and direction precision estimates produced by a Doppler lidar wind retrieval algorithm. The algorithm, which is based on the traditional velocityazimuth-display (VAD) technique, estimates the wind speed and direction measurement precision using standard error propagation techniques, assuming the input data (i.e., radial velocities) to be contaminated by random, zero-mean, errors. For this study, the lidar was configured to execute an 8-beam plan-position-indicator (PPI) scan once every 12 min during the 6-week deployment period. Several wind retrieval trials were conducted using different schemes for estimating the precision in the radial velocity measurements. The resulting wind speed and direction precision estimates were compared to differences in wind speed and direction between the VAD algorithm and sonic anemometer measurements taken on a nearby 300 m tower.All trials produced qualitatively similar wind fields with negligible bias but substantially different wind speed and direction precision fields. The most accurate wind speed and direction precisions were obtained when the radial velocity precision was determined by direct calculation of radial velocity standard deviation along each pointing direction and range gate of the PPI scan. By contrast, when the instrumental measurement precision is assumed to be the only contribution to the radial velocity precision, the retrievals resulted in wind speed and direction precisions that were biased far too low and were poor indicators of data quality.

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Section: Introductionmentioning

confidence: 99%

Validating precision estimates in horizontal wind measurements from a Doppler lidar

et al. 2017

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“…The units were spaced roughly 320 m apart and compared wind speeds and wind direction. The results showed agreeable 10‐minute averages . Fraunhofer validated the IWES Wind LiDAR Buoy against the offshore metrological mast FIN01 in the German North Sea.…”

Section: Introductionmentioning

confidence: 74%

“…The results showed agreeable 10-minute averages. 11 Fraunhofer validated the IWES Wind LiDAR Buoy against the offshore metrological mast FIN01 in the German North Sea. With the use of a software correction algorithm to compensate for sea conditions, accurate measurements could be achieved.…”

Section: Introductionmentioning

confidence: 99%

Validation of the first LiDAR wind resource assessment buoy system offshore the Northeast United States

Viselli

Filippelli²,

Pettigrew

et al. 2019

Wind Energy

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The US offshore wind industry is maturing with several projects in various stages of development. These projects require site wind and environmental data before and during operation. Conventional techniques such as fixed‐bottom meteorological towers present economical and permitting challenges for the US. Floating Light Detection and Ranging (LiDAR) buoys offer significant advantages including reduced costs, less permitting, and reusability. This paper presents the validation of the first floating LiDAR buoy in Northeast US waters. The buoy, named DeepCLiDAR, includes a LiDAR, ecological monitoring sensors, and metocean sensors. A three‐phase LiDAR validation plan was executed, and its results are presented. The objective of the validation plan was to verify the accuracy of measurements made by the LiDAR buoy in wave environments against an unmoving reference wind measurement. Due to a lack of reference met masts, the use of a LiDAR on land as a baseline reference was implemented for validation. Comparison to a reference LiDAR instead of a traditional meteorological tower was a unique approach required in the Northeast US waters due to the absence of a reference fixed‐bottom meteorological tower in the region at the time of this study. The testing included a comparison of wind speed measurements made by the buoy deployed 15 km offshore from the mainland and a land‐based reference LiDAR located on a nearby island. This paper presents the methodology and results of this program, which indicate favorable agreement. This was the first such validation program in the Northeast USA which is now seeing rapid development of offshore wind.

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“…To assess offshore wind resources efficiently, preliminary measurements can be taken by shipborne [111] or airborne [112] LiDARs within a large region. Then, ground-based [113] or floating [114] LiDARs may be used for obtaining long-term measurements at selected sites.…”

Section: Wind Resource Assessmentmentioning

confidence: 99%

A Review of Progress and Applications of Pulsed Doppler Wind LiDARs

et al. 2019

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Doppler wind LiDAR (Light Detection And Ranging) makes use of the principle of optical Doppler shift between the reference and backscattered radiations to measure radial velocities at distances up to several kilometers above the ground. Such instruments promise some advantages, including its large scan volume, movability and provision of 3-dimensional wind measurements, as well as its relatively higher temporal and spatial resolution comparing with other measurement devices. In recent decades, Doppler LiDARs developed by scientific institutes and commercial companies have been well adopted in several real-life applications. Doppler LiDARs are installed in about a dozen airports to study aircraft-induced vortices and detect wind shears. In the wind energy industry, the Doppler LiDAR technique provides a promising alternative to in-situ techniques in wind energy assessment, turbine wake analysis and turbine control. Doppler LiDARs have also been applied in meteorological studies, such as observing boundary layers and tracking tropical cyclones. These applications demonstrate the capability of Doppler LiDARs for measuring backscatter coefficients and wind profiles. In addition, Doppler LiDAR measurements show considerable potential for validating and improving numerical models. It is expected that future development of the Doppler LiDAR technique and data processing algorithms will provide accurate measurements with high spatial and temporal resolutions under different environmental conditions.

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Validation and Measurements of Floating LiDAR for Nearshore Wind Resource Assessment Application

Cited by 19 publications

References 0 publications

Validating precision estimates in horizontal wind measurements from a Doppler lidar

Validating precision estimates in horizontal wind measurements from a Doppler lidar

Validation of the first LiDAR wind resource assessment buoy system offshore the Northeast United States

A Review of Progress and Applications of Pulsed Doppler Wind LiDARs

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