Behavior of a Grid-Connected Induction-Generator Subjected to a Driving-Speed Low-Frequency Ripples

The induction generator takes a key place in most energy generating systems-based wind-turbine. Hence, the realtime assessment of its condition is dwelling a priority task for ensuring the intended quality of the provided power. In this work we study the effect of low frequency ripples of the drive-speed on the quality of the injected currents and the instantaneous power debited by an induction generator into the connection grid. In that respect, we have carried-out many experimental tests on a laboratory bench. Thus, the speed drive has been simulated by a DC motor. The obtained results have been analyzed in the frequency domain and also through Park approaches (space vector). Their exploration has shown that under such driving faulty condition the intended power quality may be seriously affected.