Direct power control of DFIG based on discrete space vector modulation

This paper presents a new direct power control (DPC) strategy for a double fed induction generator (DFIG) based wind energy generation system. Switching vectors for rotor side converter were selected from the optimal switching table using the estimated stator flux position and the errors of the active and reactive power. A few number of voltage vectors may cause undesired power and stator current ripple. In this paper the increased number of voltage vectors with application of the Discrete Space Vector Modulation (DSVM) will be presented. Then a new switching table in supersynchronous and subsynchronous frames will be proposed. Simulation results of a 2MW DFIG system demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, machine parameters, and wind speed.

[1]  R. Datta,et al.  Direct power control of grid-connected wound rotor induction machine without rotor position sensors , 2001 .

[2]  Yoshihiro Murai,et al.  New PWM Method for Fully Digitized Inverters , 1987, IEEE Transactions on Industry Applications.

[3]  Mariusz Malinowski,et al.  Virtual flux based direct power control of three-phase PWM rectifiers , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[4]  Toshihiko Noguchi,et al.  Direct power control of PWM converter without power source voltage sensors , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[5]  L.M. Tolbert,et al.  Direct torque control of induction machines using space vector modulation , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[6]  Abdelkrim Benchaib,et al.  Analysis of a robust DC-bus voltage control system for a VSC transmission scheme , 2001 .

[7]  Lie Xu,et al.  Direct Power Control of DFIG With Constant Switching Frequency and Improved Transient Performance , 2007, IEEE Transactions on Energy Conversion.

[8]  Siegfried Heier,et al.  Grid Integration of Wind Energy Conversion Systems , 1998 .

[9]  Aleksandar M. Stankovic,et al.  Analysis and design of direct power control (DPC) for a three phase synchronous rectifier via output regulation subspaces , 2003 .

[10]  Domenico Casadei,et al.  Implementation of a direct control algorithm for induction motors based on discrete space vector modulation , 2000 .

[11]  Lie Xu,et al.  Direct active and reactive power control of DFIG for wind energy generation , 2006, IEEE Transactions on Energy Conversion.

[12]  M. Depenbrock,et al.  Direct self-control (DSC) of inverter-fed induction machine , 1988 .

[13]  G. Abad,et al.  Two-Level VSC-Based Predictive Direct Power Control of the Doubly Fed Induction Machine with Reduced Power Ripple at Low Constant Switching Frequency , 2008, IEEE Transactions on Energy Conversion.

[14]  Toshihiko Noguchi,et al.  A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor , 1986, IEEE Transactions on Industry Applications.

[15]  H. van der Broeck,et al.  Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors , 1986, 1986 Annual Meeting Industry Applications Society.