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DC Bus Voltage Control of a Power Generation System Based on a Dual Star Induction Generator


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DOI: https://doi.org/10.15866/iree.v11i6.9769

Abstract


The main objective of this paper is the study and the evaluation a squirrel-cage Dual Star Induction Generator (DSIG) performances. This generator can be used in energy production at variable speed for high-power wind or hydro turbines.  The studied system consists of a DSIG feeding a static load through two voltage source inverters connected in parallel on the same DC bus. A DC motor is used to ensure the generator drive at variable speed. This scheme is chosen to avoid the generated voltage amplitude and frequency variations, which occurs in case of self-excited induction machine and depends on the rotating speed and the size of the excitation capacitors. Thus, Modeling of DSIG, in the synchronous reference frame, and different parts of generation system are given. Then control strategy development is detailed. To ensure DSIG excitation and DC bus regulation under variable speed and at different loads, a control strategy based on active and reactive power control principle is used. Finally, power generation system performances are validated by simulation and confirmed by a set of experiments, carried out on an experimental test bench composed DSIG driven by DC motor. Simulation and experimental results show that the DC bus voltage is well regulated under different mode operating.
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Keywords


: Dual Star Induction Generator; IFOC; Multiphase Induction Machine; Renewable Energy

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