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CONFERENCE PAPER
DC-link Voltage Oscilations Reduction During Unbalanced Grid Faults for High Power Wind Turbines
Location: United Kingdom
Publication date: 2011-08-30
Published in: European Conference on Power Electronics and Applications 2011, Birminghan (UK) - EPE 2011
ref. DOI: No disponible
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Miranda, H. , Teodorescu, R. , Helle, L.

 

Abstract

During unbalanced grid voltage faults the Power injected to the grid experiences 100Hz oscillations as a result of interactions between positive and negative sequence components of three-phase voltages and currents. These oscillations can become as high as %50 percent of the rated power. In this article an improved controller is proposed which present different behavior during normal operation and faults to keep track of non-sinusoidal current reference signals. The reference signals are calculated to obtain zero power oscillations. Reconfigurable resonant controllers are used for this purpose applied to 3-level Neutral-point-clamped converter in the megawatt range

 

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