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Book
1 online resource (23 p. ) : digital, PDF file.
This report addresses the general data requirements for reliability analysis of fielded wind turbines and other wind plant equipment. The report provides a list of the data needed to support reliability and availability analysis, and gives specific recommendations for a Computerized Maintenance Management System (CMMS) to support automated analysis. This data collection recommendations report was written by Sandia National Laboratories to address the general data requirements for reliability analysis of fielded wind turbines. This report is intended to help the reader develop a basic understanding of what data are needed from a Computerized Maintenance Management System (CMMS) and other data systems, for reliability analysis. The report provides: (1) a list of the data needed to support reliability and availability analysis; and (2) specific recommendations for a CMMS to support automated analysis. Though written for reliability analysis of wind turbines, much of the information is applicable to a wider variety of equipment and a wider variety of analysis and reporting needs.
Book
1 online resource (0 ) : digital, PDF file.
Summary of the Wind Energy Program's research and outreach activities for 2004.
Book
1 online resource (0 ) : digital, PDF file.
Factsheet on the Wind Energy Program's research and outreach activities in 2006.
Book
1 online resource (12 ) : digital, PDF file.
Factsheet on the Wind Energy Program's research and outreach activities in 2005.
Book
1 online resource (36 ) : digital, PDF file.
Summary of the Wind Energy Program's research and outreach activities for 2003.
Book
1 online resource (32 ): digital, PDF file.
This report provides an overview of the Wind Program's accomplishments and activities in 2010.
Book
1 online resource (24 ): digital, PDF file.
This brochure provides an overview of the Wind Program's accomplishments and activities in 2009.
Book
1 online resource (v, 107 p.) : col. ill., col. map.
This workshop brought different atmospheric and wind technology specialists together to evaluate research needs for wind resource characterization.
Book
1 online resource (13 pages) : color illustrations, color maps.
Book
1 online resource ([17] slides) : col. ill., col. map.
Book
1 online resource (50 p.) : ill. (chiefly col.).
Book
1 online resource (9 p.) : col. ill.
Book
1 online resource (iv, 24 p.) : digital, PDF file.
The dynamics of wind turbine rotor blades are conventionally expressed in rotating frames attached to the individual blades. The tower-nacelle subsystem though, sees the combined effect of all rotor blades, not the individual blades. Also, the rotor responds as a whole to excitations such as aerodynamic gusts, control inputs, and tower-nacelle motion--all of which occur in a nonrotating frame. Multi-blade coordinate transformation (MBC) helps integrate the dynamics of individual blades and express them in a fixed (nonrotating) frame. MBC involves two steps: transforming the rotating degrees of freedom and transforming the equations of motion. Reference 1 details the MBC operation. This guide summarizes the MBC concept and underlying transformations. This guide also explains how to use MBC3, a MATLAB-based script we developed to perform multi-blade coordinate transformation of system matrices for three-bladed wind turbines.
Book
1 online resource (vi, 39 p.) : ill.
This test is being conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, four turbines are being tested at the NWTC as a part of this project. Duration testing is one of up to 5 tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing provide manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a grid connected ARE 442 wind turbine mounted on a 30.5 meter (100 ft) lattice tower manufactured by Abundant Renewable Energy. The system was installed by the NWTC Site Operations group with guidance and assistance from Abundant Renewable Energy.
Book
1 online resource (v, 38 p.) : digital, PDF file.
This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Renewable Energy Laboratory's (NRELs) National Wind Technology Center (NWTC) as a part of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a Gaia-Wind 11 kW wind turbine mounted on an 18 m monopole tower. Gaia-Wind Ltd. manufactured the turbine in Denmark, although the company is based in Scotland. The system was installed by the NWTC Site Operations group with guidance and assistance from Gaia-Wind.
Book
1 online resource (v, 28 p.) : ill.
Book
1 online resource (iv, 23 p.) : ill.
This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers to wind energy expansion by providing independent testing results for small wind turbines (SWT). In total, five turbines were tested at the National Wind Technology Center (NWTC) as a part of this project. Safety and function testing is one of up to five tests performed on the turbines, including power performance, duration, noise, and power-quality tests. NWTC testing results provide manufacturers with reports that may be used to meet part of small wind turbine certification requirements. The test equipment includes a Mariah Windspire wind turbine mounted on a monopole tower. L&E Machine manufactured the turbine in the United States. The inverter was manufactured separately by Technology Driven Products in the United States. The system was installed by the NWTC site operations group with guidance and assistance from Mariah Power.
Book
1 online resource (11 p.) : ill.
In 2008, the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory began testing small wind turbines (SWTs) through the independent testing project. Four SWTs were selected for testing at NREL's National Wind Technology Center, accredited by the American Association of Laboratory Accreditation to conduct power performance, power quality, noise, safety and function, and duration tests to IEC standards. The paper reports results of testing to date, and puts the results in perspective for the average consumer. Other topics addressed include a description of DOE's second solicitation for independent testing, and a discussion of the DOE's support for developing additional testing centers to conduct preliminary screening of SWTs to identify turbines not ready for the commercial market.
Video
1 online resource (22 min).
In various parts of China, hundreds of giant wind turbines cover the landscape. Here, natural beauty and modern technology coexist. China is the next big alternative power base. With a multitude of windy locations across the country, China is a great place to harvest the world's fastest-growing energy source, wind.

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