Operational behavior of a double-fed permanent magnet generator for wind turbines
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/33854 |
| _version_ | 1826217251042230272 |
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| author | Reddy, Sivananda Kumjula |
| author2 | James L. Kirtley, Jr. |
| author_facet | James L. Kirtley, Jr. Reddy, Sivananda Kumjula |
| author_sort | Reddy, Sivananda Kumjula |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005. |
| first_indexed | 2024-09-23T17:00:24Z |
| format | Thesis |
| id | mit-1721.1/33854 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T17:00:24Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/338542019-04-12T15:58:27Z Operational behavior of a double-fed permanent magnet generator for wind turbines Reddy, Sivananda Kumjula James L. Kirtley, Jr. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005. Includes bibliographical references (leaves 117-118). Greater efficiency in wind turbine systems is achieved by allowing the rotor to change its rate of rotation as the wind speed changes. The wind turbine system is decoupled from the utility grid and a variable speed operation is implemented. Since wind speed varies, the shaft speed should too. But electrical output frequency should be synchronous and Induction machines on their own do not allow for variable ratio of shaft speed to electrical frequency. Permanent Magnet (PM) machines have major advantages: Efficiency and power density are both high: they are also inherently synchronous. A prototype ([approx]20 kW) of a novel hybrid machine that encompasses the desired features of Permanent Magnet Generators and Doubly-Fed Induction Generators (DFIGs) is being built. This novel geometry machine has to be tested for stability on a test-bed and controlled using an appropriate power electronics and controller circuit. A MATLAB 5th order model of the machine is built, linearized. simulated and examined for stability. The dynamics of the PM rotor is studied. The electrical equivalent behavior of this component of the machine is vital because the frequency of the output power is a direct function of its mechanical speed. As a culmination of this research work, possible paths for the scope of future work on this technology is presented. (cont.) Keywords: wind turbines, modified torus geometry, permanent magnet, doubly-fed induction. dynamic state-space model, electromechanical stability analysis. by Sivananda Kumjula Reddy. S.M. 2006-08-25T18:51:12Z 2006-08-25T18:51:12Z 2005 2005 Thesis http://hdl.handle.net/1721.1/33854 66272282 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 118 leaves 5260673 bytes 5266173 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Reddy, Sivananda Kumjula Operational behavior of a double-fed permanent magnet generator for wind turbines |
| title | Operational behavior of a double-fed permanent magnet generator for wind turbines |
| title_full | Operational behavior of a double-fed permanent magnet generator for wind turbines |
| title_fullStr | Operational behavior of a double-fed permanent magnet generator for wind turbines |
| title_full_unstemmed | Operational behavior of a double-fed permanent magnet generator for wind turbines |
| title_short | Operational behavior of a double-fed permanent magnet generator for wind turbines |
| title_sort | operational behavior of a double fed permanent magnet generator for wind turbines |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/33854 |
| work_keys_str_mv | AT reddysivanandakumjula operationalbehaviorofadoublefedpermanentmagnetgeneratorforwindturbines |