Modified DFIG control strategy for wind energy applications

A detailed computer simulation for interconnecting wind energy system to an electric utility is presented. The proposed system consists of four high rating wind turbines each one uses double fed induction generator (DFIG). Two back to back bidirectional PWM inverters are used in the rotor circuit of each DFIG to be interfaced with the electrical utility. The simulation incorporates a flexible independent control for the active and reactive powers by using field oriented control technique. Also it introduces an effective technique to track the maximum power point of the wind energy by controlling the pitch angle and rotational speed. Active power is controlled through the direct axis current of the rotor side converter in outer control layer. Reactive power is controlled by the quadrature axis current of the rotor side converter. The system shows a stable operation under different operating conditions.

[1]  P. Siano,et al.  A fuzzy controller for maximum energy extraction from variable speed wind power generation systems , 2008 .

[2]  Saudi Arabia,et al.  Modeling of Wind Turbine Driving Permanent Magnet Generator with Maximum Power Point Tracking System , 2007 .

[3]  Ahmed A. El-Sattar,et al.  Dynamic response of doubly fed induction generator variable speed wind turbine under fault , 2008 .

[4]  S.K. Kottayil,et al.  Transient Fault Response of Grid Connected Wind Electric Generators , 2006, 2006 International Conference on Power Electronic, Drives and Energy Systems.

[5]  Qichang Duan,et al.  Adaptive fuzzy control used in DFIG VSCF wind power generator system , 2008, 2008 7th World Congress on Intelligent Control and Automation.

[6]  Abderrazak Ouali,et al.  A fuzzy logic supervisor for active and reactive power control of a fixed speed wind energy conversion system , 2008 .

[7]  A. Yazdani.  Islanded Operation of A Doubly-Fed Induction Generator (DFIG) Wind-Power System with Integrated Energy Storage , 2007, 2007 IEEE Canada Electrical Power Conference.

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

[9]  Le-Ren Chang-Chien,et al.  Dynamic reserve allocation for system contingency by DFIG wind farms , 2008, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.

[10]  D. Jovcic,et al.  Dynamic Modelling, Simulation and Analysis of an Offshore Variable-Speed Directly-Driven Permanent-Magnet Wind Energy Conversion and Storage System (WECSS) , 2007, OCEANS 2007 - Europe.

[11]  Ying Hua Han,et al.  Grid Integration of Wind Energy Conversion Systems , 2000 .

[12]  El Madjid Berkouk,et al.  Network power flux control of a wind generator , 2009 .

[13]  Peter Vas,et al.  Sensorless vector and direct torque control , 1998 .

[14]  Paul C. Krause,et al.  Analysis of electric machinery , 1987 .

[15]  J. Ekanayake,et al.  Support for spinning reserve from DFIG based wind turbines , 2007, 2007 International Conference on Industrial and Information Systems.

[16]  Yu Zhang,et al.  A synergetic control approach to grid-connected, wind-turbine doubly-fed induction generators , 2008, 2008 IEEE Power Electronics Specialists Conference.

[17]  G. Joos,et al.  Design of a Robust Speed and Position Sensorless Decoupled P-Q Controlled Doubly-Fed Induction Generator for Variable-Speed Wind Energy Applications , 2007, 2007 IEEE Canada Electrical Power Conference.