30 research outputs found
Duration Test Report for the Viryd CS8 Wind Turbine
This report summarizes the results of a duration noise test that the National Renewable Energy Laboratory (NREL) conducted on the Viryd CS8 wind turbine. This test was conducted in accordance with Clause 9.4 of the International Electrotechnical Commission's (IEC) standard, Wind turbines - Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed. 2.0:2006-03. NREL researchers evaluated the turbine based on structural integrity and material degradation, quality of environmental protection, and dynamic behavior
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Duration Test Report for the Viryd CS8 Wind Turbine
This report summarizes the results of a duration noise test that the National Renewable Energy Laboratory (NREL) conducted on the Viryd CS8 wind turbine. This test was conducted in accordance with Clause 9.4 of the International Electrotechnical Commission's (IEC) standard, Wind turbines - Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed. 2.0:2006-03. NREL researchers evaluated the turbine based on structural integrity and material degradation, quality of environmental protection, and dynamic behavior
Power Performance Test Report for the Viryd CS8 Wind Turbine
This report contains the results of the power performance test that was performed on a Viryd CS8 wind turbine as part of the DOE Independent Testing project. The test is an accredited test to the IEC 61400-12-1 power performance standard
Acoustic Array Development for Wind Turbine Noise Characterization
This report discusses the design and use of a multi-arm, logarithmic spiral acoustic array by the National Renewable Energy Laboratory (NREL) for measurement and characterization of wind turbine-generated noise. The array was developed in collaboration with a team from the University of Colorado Boulder. This design process is a continuation of the elliptical array design work done by Simley. A description of the array system design process is presented, including array shape design, mechanical design, design of electronics and the data acquisition system, and development of post-processing software. System testing and calibration methods are detailed. Results from the initial data acquisition campaign are offered and discussed. Issues faced during this initial deployment of the array are presented and potential remedies discussed
Analysis of control-oriented wake modeling tools using lidar field results
The objective of this paper is to compare field data from a
scanning lidar mounted on a turbine to control-oriented wind turbine wake
models. The measurements were taken from the turbine nacelle looking
downstream at the turbine wake. This field campaign was used to validate
control-oriented tools used for wind plant control and optimization. The
National Wind Technology Center in Golden, CO, conducted a demonstration of
wake steering on a utility-scale turbine. In this campaign, the turbine was
operated at various yaw misalignment set points, while a lidar mounted on the
nacelle scanned five downstream distances. Primarily, this paper examines
measurements taken at 2.35 diameters downstream of the turbine. The lidar
measurements were combined with turbine data and measurements of the
inflow made by a highly instrumented meteorological mast on-site. This paper
presents a quantitative analysis of the lidar data compared to the
control-oriented wake models used under different atmospheric conditions and
turbine operation. These results show that good agreement is obtained between the
lidar data and the models under these different conditions.</p
Initial results from a field campaign of wake steering applied at a commercial wind farm – Part 1
Wake steering is a form of wind farm control in which turbines use
yaw offsets to affect wakes in order to yield an increase in total energy
production. In this first phase of a study of wake steering at a commercial
wind farm, two turbines implement a schedule of offsets. Results exploring
the observed performance of wake steering are presented and some
first lessons learned. For two closely spaced turbines, an approximate
14 % increase in energy was measured on the downstream turbine over a
10∘ sector, with a 4 % increase in energy production of the
combined upstream–downstream turbine pair. Finally, the influence of
atmospheric stability over the results is explored.</p
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Acoustic Noise Test Report for the SWIFT Wind Turbine in Boulder, CO
This report summarizes the results of an acoustic noise test that the National Renewable Energy Laboratory (NREL) conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 11: Acoustic Noise Measurement Techniques, IEC 61400-11 Ed.2.1, 2006-11. However, because the SWIFT is a small turbine, as defined by IEC, NREL used 10-second averages instead of 60-second averages and utilized binning by wind speed instead of regression analysis
Acoustic Noise Test Report for the SWIFT Wind Turbine in Boulder, CO
This report summarizes the results of an acoustic noise test that the National Renewable Energy Laboratory (NREL) conducted on the SWIFT wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 11: Acoustic Noise Measurement Techniques, IEC 61400-11 Ed.2.1, 2006-11. However, because the SWIFT is a small turbine, as defined by IEC, NREL used 10-second averages instead of 60-second averages and utilized binning by wind speed instead of regression analysis