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Control of Self-Excited Induction Generators Driven by Wind Turbines
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| Author(s) |
J. Sallan; E. Muljadi; M. Sanz; C. P. Butterfield |
| Abstract |
The use of squirrel-cage induction machines in variable-speed wind generation systems presents serveal advantages. The cage induction machine is simple, reliable, requires very little maintenance and has a low cost and weight per kilowatt. Besides, the variable speed operation allows an increase in the energy captured and reduces both the torque peaks in the drive train and the fluctuations in the power sent to the utility. Its main drawback is the need for an electronic interface to connect the generator to the utility. This interface can be greatly simplified by using a self-excited generator because in that case a simple diode bridge is required to perform the AC/DC conversion. The subsequent AC/DC conversion can be performed by means of different techniques. One that is readily available for large power conversion, has a low cost and is highly reliable is the use of a thyristor bridge. The delay angle of the bridge can be used to make the wind turbine track the optimum power curve. This paper analyzes the operation of such a system applied to a 1/3 hp self-excited generator. It presents the main results from the simulation and the test performed for the different excitation configurations. |
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| Filename: | EPE1999 - PP00285 - Sallan.pdf |
| Filesize: | 427.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2004-04-06 by System |
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