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Comparison of two independent LIDAR-based pitch control designs / F. Dunne, D. Schlipf, L.Y. Pao.
- Format:
- Book
- Government document
- Author/Creator:
- Dunne, F.
- Series:
- NREL/SR ; 5000-55544.
- NREL/SR ; 5000-55544
- Language:
- English
- Subjects (All):
- Optical radar--United States.
- Wind turbines--United States.
- Optical radar.
- Wind turbines.
- United States.
- Physical Description:
- 1 online resource (36 pages) : color illustrations.
- Other Title:
- Comparison of two independent light detection and ranging-based pitch control designs
- Place of Publication:
- Golden, Colo. : National Renewable Energy Laboratory, [2012]
- Summary:
- Two different lidar-based feedforward controllers have previously been designed for the NREL 5 MW wind turbine model under separate studies. Feedforward controller A uses a finite-impulse-response design, with 5 seconds of preview, and three rotating lidar measurements. Feedforward controller B uses a static-gain design, with the preview time defined by the pitch actuator dynamics, a simulationof a real nacelle-based scanning lidar system, and a lowpass filter defined by the lidar configuration. These controllers are now directly compared under the same lidar configuration, in terms of fatigue load reduction, rotor speed regulation, and power capture. The various differences in design choices are discussed and compared. We also compare frequency plots of individual pitch feedforwardand collective pitch feedforward load reductions, and we see that individual pitch feedforward is effective mainly at the once-per-revolution and twice-per-revolution frequencies. We also explain how to determine the required preview time by breaking it down into separate parts, and we then compare it to the expected preview time available.
- Notes:
- Title from title screen (viewed on Sept. 28, 2012).
- "August 2012."
- Includes bibliographical references (pages 35-36).
- "Prepared under Subcontract No. XEE-1-11300-01."
- "Contract No. DE-AC36-08GO28308."
- OCLC:
- 811339251
- Publisher Number:
- 1050139 OSTI ID
- Access Restriction:
- Publicly released
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