A systematic approach to design and operation of a doubly fed induction generator

The doubly fed induction generator (DFIG) is currently one of the most common topologies employed for wind turbine generators (WTGs). The system has the benefit of a back-to-back voltage sourced converter (VSC) of reduced rating, due to its connection to the rotor windings. This paper considers the impact of mechanical and electrical parameters on the kVA requirements of the two VSCs, which together with the dc link capacitor serve as the rotor winding's power supply. This topology is contrasted with alternatives utilizing a diode rectifier-voltage sourced inverter pair and a set of design curves are generated. In addition to steady-state analysis, an operating strategy for reactive power allocation management is proposed. The theoretical considerations are validated with results obtained from representation of the system in an electromagnetic transient program.

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

[2]  W. Hofmann,et al.  Optimal active and reactive power control with the doubly-fed induction generator in the MW-class wind-turbines , 2001, 4th IEEE International Conference on Power Electronics and Drive Systems. IEEE PEDS 2001 - Indonesia. Proceedings (Cat. No.01TH8594).

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

[4]  L. Ran,et al.  Use of turbine inertia for power smoothing of wind turbines with a DFIG , 2004, 2004 11th International Conference on Harmonics and Quality of Power (IEEE Cat. No.04EX951).

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

[6]  Vladislav Akhmatov.  Variable-Speed Wind Turbines with Doubly-Fed Induction Generators Part IV: Uninterrupted Operation Features at Grid Faults with Converter Control Coordination , 2003 .

[7]  Janaka Ekanayake,et al.  Dynamic modeling of doubly fed induction generator wind turbines , 2003 .

[8]  Hirofumi Akagi,et al.  Control and performance of a doubly-fed induction machine intended for a flywheel energy storage system , 2002 .

[9]  V. T. Ranganathan,et al.  A simple position-sensorless algorithm for rotor-side field-oriented control of wound-rotor induction machine , 2001, IEEE Trans. Ind. Electron..

[10]  V. T. Ranganathan,et al.  A Method of Tracking the Peak Power Points for a Variable Speed Wind Energy Conversion System , 2002, IEEE Power Engineering Review.