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Energies 2016, 9(1), 16; doi:10.3390/en9010016

Enhancing LVRT of DFIG by Using a Superconducting Current Limiter on Rotor Circuit

1
Department of Computer and Electronics, Federal University of Espírito Santo, São Mateus-ES 29932-540, Brazil
2
Department of Electrical Engineering, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil
3
Department of Physics, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil
4
Department of Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte-MG 31270-901, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 23 October 2015 / Revised: 10 December 2015 / Accepted: 16 December 2015 / Published: 25 December 2015
(This article belongs to the Special Issue Wind Turbine 2015)
View Full-Text   |   Download PDF [2085 KB, uploaded 25 December 2015]   |  

Abstract

This paper have studied the dynamic of a 2.0 MW Doubly Fed Induction Generator (DFIG) during a severe voltage sag. Using the dynamic model of a DFIG, it was possible to determine the current, Electromagnetic Force and flux behavior during three-phase symmetrical voltage dip. Among the technologies of wind turbines the DFIG is widely employed; however, this machine is extremely susceptible to disturbances from the grid. In order to improve DFIG Low Voltage Ride-Through (LVRT), it is proposed a novel solution, using Superconducting Current Limiter (SCL) in two arrangements: one, the SCL is placed between the machine rotor and the rotor side converter (RSC), and another placed in the RSC DC-link. The proposal is validated through simulation using PSCAD™/EMTDC™ and according to requirements of specific regulations. The analysis ensure that both SCL arrangements behave likewise, and are effective in decrement the rotor currents during the disturbance. View Full-Text
Keywords: doubly fed induction generator (DFIG); wind turbines; voltage sags; crowbar; superconducting current limiter (SCL); low voltage ride-through (LVRT) doubly fed induction generator (DFIG); wind turbines; voltage sags; crowbar; superconducting current limiter (SCL); low voltage ride-through (LVRT)
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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MDPI and ACS Style

Oliveira, F.; Amorim, A.; Encarnação, L.; Fardin, J.; Orlando, M.; Silva, S.; Simonetti, D. Enhancing LVRT of DFIG by Using a Superconducting Current Limiter on Rotor Circuit. Energies 2016, 9, 16.

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