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Energies 2018, 11(3), 480; https://doi.org/10.3390/en11030480

A Comparative Study on Controllers for Improving Transient Stability of DFIG Wind Turbines During Large Disturbances

1,†,* , 2,†
,
2,†,* and 1,†
1
Department of Electrical Engineering, The University of Da Nang- University of Science and Technology, Block A, 54 Nguyen Luong Bang Street, LienChieu District, DaNang 550000, Vietnam
2
Dipartimento di Energia, Politecnico di Milano, via La Masa 34, 20156 Milano, Italy
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 31 December 2017 / Revised: 17 February 2018 / Accepted: 19 February 2018 / Published: 25 February 2018
(This article belongs to the Special Issue Wind Generators Modelling and Control)
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Abstract

Under power system short-circuits, the Doubly-Fed Induction Generator (DFIG) Wind Turbines (WT) are required to be equipped with crowbar protections to preserve the lifetime of power electronics devices. When the crowbar is switched on, the rotor windings are short-circuited. In this case, the DFIG behaves like a squirrel-cage induction generator (SCIG) and can adsorb reactive power, which can affect the power system. A DFIG based-fault-ride through (FRT) scheme with crowbar, rotor-side and grid-side converters has recently been proposed for improving the transient stability: in particular, a hybrid cascade Fuzzy-PI-based controlling technique has been demonstrated to be able to control the Insulated Gate Bipolar Transistor (IGBT) based frequency converter in order to enhance the transient stability. The performance of this hybrid control scheme is analyzed here and compared to other techniques, under a three-phase fault condition on a single machine connected to the grid. In particular, the transient operation of the system is investigated by comparing the performance of the hybrid system with conventional proportional-integral and fuzzy logic controller, respectively. The system validation is carried out in Simulink, confirming the effectiveness of the coordinated advanced fuzzy logic control. View Full-Text
Keywords: Doubly-Fed Induction Generator (DFIG); squirrel-cage induction generator (SCIG); crowbar protection; transient stability; wind turbine Doubly-Fed Induction Generator (DFIG); squirrel-cage induction generator (SCIG); crowbar protection; transient stability; wind turbine
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Duong, M.Q.; Leva, S.; Mussetta, M.; Le, K.H. A Comparative Study on Controllers for Improving Transient Stability of DFIG Wind Turbines During Large Disturbances. Energies 2018, 11, 480.

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