TY - JOUR
T1 - Direct power control of DFIG with constant switching frequency and improved transient performance
AU - Zhi, D.
AU - Xu, L.
PY - 2007/3
Y1 - 2007/3
N2 - This paper proposes a new direct power control (DPC) strategy for a doubly fed induction generator (DFIG)-based wind turbine system. The required rotor control voltage, which eliminates active and reactive power errors within each fixed time period, is directly calculated based on stator flux, rotor position, and active and reactive powers and their corresponding errors. No extra power or current control loops are required, simplifying the system design, and improving transient performance. Constant converter switching frequency is achieved that eases the design of the power converter and the ac harmonic filter. Rotor voltage limit during transients is investigated, and a scheme is proposed that prioritizes the active and reactive power control such that one remains fully controlled while the error of the other is reduced. The impact of machine parameter variations on system performance is investigated and found negligible. Simulation results for a 2 MW DFIG system demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, machine parameters, and wind speed
AB - This paper proposes a new direct power control (DPC) strategy for a doubly fed induction generator (DFIG)-based wind turbine system. The required rotor control voltage, which eliminates active and reactive power errors within each fixed time period, is directly calculated based on stator flux, rotor position, and active and reactive powers and their corresponding errors. No extra power or current control loops are required, simplifying the system design, and improving transient performance. Constant converter switching frequency is achieved that eases the design of the power converter and the ac harmonic filter. Rotor voltage limit during transients is investigated, and a scheme is proposed that prioritizes the active and reactive power control such that one remains fully controlled while the error of the other is reduced. The impact of machine parameter variations on system performance is investigated and found negligible. Simulation results for a 2 MW DFIG system demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, machine parameters, and wind speed
KW - constant switching frequency
KW - DFIG
KW - direct
power control
KW - pulse width modulation (PWM) converter
KW - wind
energy
UR - http://ieeexplore.ieee.org/iel5/60/4105991/04106023.pdf?tp=&arnumber=4106023&isnumber=4105991
UR - http://dx.doi.org/10.1109/TEC.2006.889549
U2 - 10.1109/TEC.2006.889549
DO - 10.1109/TEC.2006.889549
M3 - Article
SN - 0885-8969
VL - 22
SP - 110
EP - 118
JO - IEEE Transactions on Energy Conversion
JF - IEEE Transactions on Energy Conversion
IS - 1
ER -