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

Flávio Oliveira, Arthur Amorim, Lucas Encarnação, Jussara Fardin, Marcos Orlando, Selênio Silva and Domingos Simonetti
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Flávio Oliveira: Department of Computer and Electronics, Federal University of Espírito Santo, São Mateus-ES 29932-540, Brazil
Arthur Amorim: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil
Lucas Encarnação: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil
Jussara Fardin: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil
Marcos Orlando: Department of Physics, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil
Selênio Silva: Department of Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte-MG 31270-901, Brazil
Domingos Simonetti: Department of Electrical Engineering, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil

Energies, 2015, vol. 9, issue 1, 1-12

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.

Keywords: doubly fed induction generator (DFIG); wind turbines; voltage sags; crowbar; superconducting current limiter (SCL); low voltage ride-through (LVRT) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
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