RT Journal Article
A1 V.-T. Phan
A1 H.-H. Lee

PB iet
T1 Improved predictive current control for unbalanced stand-alone doubly-fed induction generator-based wind power systems
JN IET Electric Power Applications
VO 5
IS 3
SP 275
OP 287
AB This study proposes an improved predictive current control (PCC) strategy for unbalanced stand-alone doubly-fed induction generator (DFIG)-based wind power systems. The proposed control scheme predicts an appropriate average rotor voltage vector in next switching period to eliminate the rotor current errors in the following control period. The identified voltage vector sequence is then applied to the rotor-side converter (RSC) by using space-vector modulation with constant switching frequency. To increase the control accuracy, a proposed compensation method for the control time delay inherent in the digital implementation, mainly due to the sampling and calculation processes, is adopted. The whole control algorithm is performed in the RSC to achieve the desired control output, that is, compensation for the stator voltage imbalance. In addition, the effect of parameter variation on the performance of the control scheme is also considered. The proposed PCC method was tested by both simulations and experiments with 2.2 kW DFIG feeding an unbalanced load to demonstrate the excellent steady-state performance as well as the extremely fast dynamic response of the proposed current controller.
K1 rotor voltage vector
K1 doubly-fed induction generator
K1 wind power systems
K1 space-vector modulation
K1 DFIG
K1 rotor current errors
K1 stator voltage imbalance
K1 unbalanced stand-alone doubly-fed induction generator
K1 rotor-side converter
K1 predictive current control
K1 constant switching frequency
K1 power 2.2 kW
DO https://doi.org/10.1049/iet-epa.2010.0107
UL https://digital-library.theiet.org/;jsessionid=md1cujliv78c.x-iet-live-01content/journals/10.1049/iet-epa.2010.0107
LA English
SN 1751-8660
YR 2011
OL EN