Doubly-fed induction generator control during unbalanced grid conditions

In the last few years, the number of grid connected wind conversion systems (WECS) has increased rapidly. One of the most commercialized WECS technologies is the doubly-fed induction generator (DFIG) that offers operational and economical advantages over other ones. Nevertheless, this system has as...

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Bibliographic Details
Published in2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC) pp. 1 - 6
Main Authors Mendes, Victor F., Pereira, Heverton, Matos, Frederico F., Hofmann, Wilfried, Silva, Selenio R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2015
Subjects
Doubly-fed Induction Generator
Mathematical model
Oscillators
Power quality
Rotors
Stator windings
Unbalanced Grid Voltage
Voltage control
Wind Energy Conversion Systems
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Summary:In the last few years, the number of grid connected wind conversion systems (WECS) has increased rapidly. One of the most commercialized WECS technologies is the doubly-fed induction generator (DFIG) that offers operational and economical advantages over other ones. Nevertheless, this system has as the main drawback the high susceptibility to grid disturbances. During unbalanced grid voltages, negative sequence component of flux arises, inducing high distorted rotor voltages that influence the system control. The classical control topology behavior and the performance of two control strategies (dual PI and resonant controllers) for controlling the negative sequence component are analyzed. The analysis are carried out through simulation results in a 2MW WECS model, and validated with experimental results in a 4kW scaled test bench.
DOI:10.1109/COBEP.2015.7420211