Balduino C. Rabelo

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The high penetration level of wind power generation in an interconnected electrical network carries new technical challenges regarding system stability. Despite the stochastic nature of the wind, grid reliability has to be guaranteed. In compliance with power companies' new requirements on wind turbines as regards contribution to voltage regulation, this(More)
State-of-the-art doubly-fed induction generator drives avoid operation at synchronous speed. Engineers point out stability problems and unequal heating of semiconductors and windings as the main reasons. The latter problem is consequence of unequal losses distribution in the semiconductors and rotor windings. This work investigates the thermal behaviour of(More)
In this work the modelling and design for a wind generation control system using the doubly-fed induction machine and a DSP-based experimental set-up construction as well as part of its commissioning are presented. A DC-machine driven by a thyristor bridge emulates the windmill and is connected to the shaft of the generator. The latter is fed through its(More)
Wind energy conversion systems using the doubly-fed induction generator (DFIG) are the most commercialized topology worldwide, because this technology uses converters dimensioned for ±30% of the system rated power, thus reducing the equipment cost. The direct connection of the DFIG stator to the electrical system increases its sensitivity to grid(More)
This paper presents the emulation of an isolated wind energy conversion system, which is composed by a doubly-fed induction generator, a back-to-back converter connected to its rotor, a LC filter to minimize the harmonic pollution in the generated voltage and an isolated three-phase load. In first instance, the test bench is described and its operational(More)
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