An innovative electronic system for testing the performance of wind turbines is presented. The main goal of the system is to increase the accuracy in the measurements of torque and speed for each steady-state point of the turbine characteristic power curve. Another useful advantage provided by the electronic control is given by the possibility of fine tuning the load in order to obtain a large number of steady state experimental points describing the characteristic curve of the turbine. Moreover, the system is suitable for integration into an automatic data acquisition and control system. In the paper the main characteristics of the electronic system are described and compared with a traditional system. This electronic control system is used for testing a small Vertical Axis Wind Turbine in a wind tunnel. The wind turbine is directly coupled to a direct current electric generator, and a chopper, electronically controlled by means of a Pulse Width Modulator, is used to supply the circuit. The electric generator is used for braking the wind turbine at various speeds during the performance test. The experimental results obtained through the proposed system are presented and discussed.

Issue Section:
Technical Papers
Keywords:
wind turbines, automatic testing, automatic test equipment, wind tunnels, torque measurement, velocity measurement
Topics:
Circuits, Stress, Testing, Torque, Turbines, Wind tunnels, Wind turbines, Helicopters, Steady state, Generators, Machinery, Vertical axis wind turbines
1.
Carlin, P. W., and Fingersh, L. J., 1997, “Some Preliminary Results from the NTWC Direct-Drive, Variable-Speed Test Bed,” A Collection of the 1997 ASME Wind Energy Symposium Technical Papers Reno, Nevada, pp. 301–308.
2.
Sutherland, H. J., and Carlin, P. W., 1998, “Damage Measurements on the NWTC Direct-Drive, Variable-Speed Test Bed,” A Collection of the 1998 ASME Wind Energy Symposium Technical Papers, Reno, Nevada, pp. 315–322.
3.
Schepers, J. G., 1999, “An Engineering Model for Yawed Conditions, Developed on the Basis of Wind Tunnel Measurements,” A Collection of the 1999 ASME Wind Energy Symposium Technical Papers, Reno, Nevada, pp. 164–174.
4.
Fortunato
,
B.
,
Dadone
,
A.
, and
Trifoni
,
V.
,
1995
, “
A Two Dimensional Methodology to Predict Vertical Axis Wind Turbines Performance
,”
ASME J. Sol. Energy Eng.
,
117
, No.
3
, pp.
187
–
193
.
5.
Grant
,
I.
,
Mo
,
M.
,
Pan
,
X.
,
Parkin
,
P.
,
Powell
,
J.
,
Reinecke
,
H.
,
Shuang
,
K.
,
Coton
,
F.
, and
Lee
,
D.
,
2000
, “
An experimental and numerical study of the vortex filaments in the wake of an operational, horizontal-axis, wind turbine
,”
J. Wind. Eng. Ind. Aerodyn.
,
85
, No.
2
, pp.
177
–
189
.
6.
Casalini, F., and Fortunato, B., 1992, “Analisi Sperimentale in Galleria del Vento di un modello di Turbina Eolica,” Proc. of 47° Congresso Nazionale ATI, Parma, Italy, pp. 819–832.
7.
Fitzgerald, A. E., Kingsley Jr., C., and Kusko, A., 1990, Electric Machinery, McGraw-Hill, New York.
8.
Dewan, S. B., and Straughen, A., 1975, Power Semiconductor Circuits, John Wiley & Sons, New York.
9.
Millman, J., and Grabel, A., 1992, Microelectronics, McGraw-Hill, New York.
10.
Doebelin, O. E., 1990, Measurement Systems, McGraw-Hill, New York.
Copyright © 2001
 by ASME
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