Control strategy for the rotor side converter of a DFIG-WT under balanced voltage sag
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Cita com:
hdl:2117/9283
Tipus de documentComunicació de congrés
Data publicació2009
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
This paper proposes a new control
technique to improve the fault-ride through capability of
doubly fed induction generators (DFIG). In such
generators the appearance of severe voltage sags at the
coupling point make rise to high over currents at the
rotor/stator windings, something that makes necessary to
protect the machine as well as the rotor side power
converter. As a difference with the most extended
solution, that reduces these currents by means of the
connection of a crowbar circuit, this works intends to
enhance the DFIGs response in such conditions without
introducing extra hardware in the system. To this end,
the proposed control system feedback the stator currents
as the rotor current reference during the fault, until they
are driven to their nominal values. The feasibility of this
proposal has been proven by means of mathematical and
simulation models, based on PSCAD/EMTDC, as well as
experimental results from a prototype of 6kW rated
power.
CitacióLima, K. [et al.]. Control strategy for the rotor side converter of a DFIG-WT under balanced voltage sag. A: Brazilian Power Electronics Conference. "10th Brazilian Power Electronics Conference". Bonito, Mato Grosso do Sul: 2009, p. 842-847.
ISBN978-1-4244-3369-8
Versió de l'editorhttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5347615
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