Wind Power Extraction from DFIG Wind Turbines Using Stator-Voltage and Stator-Flux Oriented Frames

This paper investigates and compares wind power extraction from a DFIG (doubly-fed induction generator) wind turbine using stator-voltage and stator-flux oriented frames. The paper analyzes how wind power extraction control of a DFIG wind turbine is converted to speed control, and then how speed and reactive power control of the wind turbine is converted to generator current control using the two different orientation frames. The paper also investigates what are the differences in developing wind power extraction control strategies of a DFIG wind turbine using the two different orientation frames. Simulation study is conducted for a 1.5MW DFIG wind turbine, in which the turbine driving torque is modeled by considering typical wind turbine aerodynamic characteristics. The study shows that the performance of DFIG wind power extraction is similar using both stator-voltage and stator-flux oriented frames. But, it is found that a conventional wind power extraction approach using the stator-flux oriented frame could deteriorate the power quality of the DFIG system while it is more stable to estimate the position of the stator-flux space vector by simply adding -90 degree to the stator-voltage space vector.

[1]  M.E.H. Benbouzid,et al.  Sliding Mode Power Control of Variable Speed Wind Energy Conversion Systems , 2008, 2007 IEEE International Electric Machines & Drives Conference.

[2]  M. G. Ioannides,et al.  Generalized optimization slip power recovery drives , 1990 .

[3]  J. M. Kauffmann,et al.  Double-fed induction machine: converter optimisation and field oriented control without position sensor , 1998 .

[4]  Dewei Xu,et al.  Modeling and Control of Brushless Doubly-Fed Induction Generators in Wind Energy Applications , 2008, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[5]  Shuhui Li,et al.  Comparative study of DFIG power control using stator-voltage and stator-flux oriented frames , 2009, 2009 IEEE Power & Energy Society General Meeting.

[6]  Muammer Ermis,et al.  Double-output induction generator operating at subsynchronous and supersynchronous speeds: steady-state performance optimisation and wind-energy recovery , 1992 .

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

[8]  J. A. Tegopoulos,et al.  Steady State Analysis of a Doubly-Fed Induction Generator under Synchronous Operation , 1989, IEEE Power Engineering Review.

[9]  Mitja Nemec,et al.  Direct Current Control of a Synchronous Machine in Field Coordinates , 2009, IEEE Transactions on Industrial Electronics.

[10]  Oleg Wasynczuk,et al.  Reference frame analysis of a slip energy recovery system , 1988 .

[11]  Jon Clare,et al.  Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation , 1996 .

[12]  Lie Xu,et al.  Dynamic Modeling and Control of DFIG-Based Wind Turbines Under Unbalanced Network Conditions , 2007, IEEE Transactions on Power Systems.

[13]  P.W. Lehn,et al.  Control Methodology to Mitigate the Grid Impact of Wind Turbines , 2007, IEEE Transactions on Energy Conversion.

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

[15]  R. W. De Doncker,et al.  Doubly fed induction generator systems for wind turbines , 2002 .

[16]  Zuwei Yu,et al.  Wind speed modeling and energy production simulation with Weibull sampling , 2008, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.

[17]  E. Monmasson,et al.  Predictive control of a doubly-fed induction generator connected to an isolated grid , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[18]  Peter Tavner,et al.  Improved energy conversion for doubly-fed wind generators , 2005 .

[19]  Frede Blaabjerg,et al.  Control of Variable Speed Wind Turbines with Doubly-Fed Induction Generators , 2004 .