Testing Small Wind Turbine Generators - Renewable and ...

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AbstractTesting Small Wind Turbine Generators: Design of a Driving DynamometerbyStephen Rehmeyer PepeMasters of Science, Plan II in Mechanical EngineeringUniversity of California, BerkeleyProfessor Daniel Kammen, ChairTo design an effective wind turbine, it is essential to understand the characteristics of itselectrical generator. While the generator itself does not interact with the wind directly, itsproperties determine how the turbine’s rotor will respond to the wind. In this way, thegenerator effects the turbine performance profoundly, and must be designed in tandem withits intended rotor. To enable small wind turbine generators to be tested in the laboratory, adriving dynamometer is designed and built. This test platform is designed to run generatorsat variable speed and load resistance, up to 240 rpm and 1.0 kW. The dynamometer is testedto establish its own performance characteristics, and is used to test and evaluate a small windturbine generator. Improvements are proposed that would facilitate its future use testingother small wind turbine generators.Professor Daniel KammenCommittee Chair1
“And now,” cried Max, “let the wild rumpus start!”– Maurice SendakWhere the Wild Things Arei
Page 1 and 2: Testing Small Wind Turbine Generato
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Page 8 and 9: 2.5 Control System . . . . . . . .
Page 11 and 12: List of Figures1.1 California Energ
Page 13 and 14: List of Tables2.1 Phase names and a
Page 16 and 17: Chapter 1IntroductionHorizontal boo
Page 18 and 19: Figure 1.1. California Energy and P
Page 20 and 21: Chapter 2System DesignI had investe
Page 22 and 23: instantaneous shaft position, a dig
Page 24 and 25: consist of only one deep channel, s
Page 26 and 27: Figure 2.4. One of two roller platf
Page 28 and 29: 1/2”. The next has an inside diam
Page 30 and 31: Motor ConnectionsPhase Name DC Posi
Page 32 and 33: Figure 2.10. Active motor phases fo
Page 34 and 35: meet these requirements are ON Semi
Page 36 and 37: and to ground. This current flow al
Page 38 and 39: Figure 2.17. Assembled control circ
Page 40 and 41: indefinitely to continuously keep t
Page 42 and 43: difference is divided by the one se
Page 44 and 45: is independent from the main DC pow
Page 46 and 47: 2.6.2 Electrical SystemTo load the
Page 48 and 49: Figure 2.23. Complete dump load, in
Page 50 and 51: Chapter 3TestingThe perception of e
Page 52 and 53: 1. Begin with no dump load resistor
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The dynamometer frame was slightly
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to address this problem.While a sol
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4.1 OverviewOnce testing has been p
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is the same for all phases: R P = 0
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Curve Number Basis Equation1 T F =
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Figure 4.5. Difference between mode
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elated to the DC output voltage by
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T T = 1 (√ω 3VLM I M − I 2 )M
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The resultant model is then checked
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Table 4.3 shows the final generator
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Efficiency EquationLastly, the gene
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Figure 4.8. Generator line voltage:
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more bits of information: the rated
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Chapter 5Summary and ConclusionsThi
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Dynamometer1. The dynamometer is a
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BibliographyLieu, P. D. K., Design
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Figure A.1. Primary transistor spec
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Figure A.3. Quadrature optical enco
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Figure A.5. Digital signal processo
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Figure A.7. Three-phase bridge rect
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Figure A.9. Operational amplifier s
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Figure B.1. Dynamic C code, page 1
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Appendix CRaw Test DataFigure C.1.
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