Abstract
The wind power generator system has been widely studied. Most of these system, however, are constructed by voltage source inverter and synchronous or induction machine. In these system, chopper circuit to maintain direct current voltage constantly of CVCF inverter is needed, because induced electromotive force is varied widely by the change of wind velocity. In addition, capacity of generator and inverter must be larger than maximum supply capability. These problems cause increasing mechanical loss or size of AC generator.In this paper, wind power system using a wound rotor-induction machine are discussed. In this system, capacity of inverter and generator can be reduced to half by controlling the rotation speed of generator. Above all, by using current source inverter, this system supplies three-phase electric power with constant voltage and sinusoidal waveforms.This paper describes the principle and performance characteristics of system. Experimental result of the testing machine shows that this method is useful for decreasing mechanical loss and the size of system.
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