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

Energies

Flávio Oliveira⁴  Arthur Amorim²  Lucas Encarnação²  Jussara Fardin²  Marcos Orlando¹  Selênio Silva³  Domingos Simonetti² 

[1] Department of Physics, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil;Department of Electrical Engineering, Federal University of Espírito Santo, Vitória-ES 29075-910, Brazil;Department of Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte-MG 31270-901, Brazil;Department of Computer and Electronics, Federal University of Espírito Santo, São Mateus-ES 29932-540, Brazil;

关键词: doubly fed induction generator (DFIG);    wind turbines;    voltage sags;    crowbar;    superconducting current limiter (SCL);    low voltage ride-through (LVRT);   

DOI  :  10.3390/en9010016

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.