Modeling and Control of a Wind Power Conversion System Based on the Double-Fed Asynchronous Generator

Abstract

Abstract Wind energy has many advantages, it does not pollute and it is an inexhaustible source. However, the cost of this energy is still too high to compete with traditional fossil fuels, especially on sites less windy. The performance of a wind turbine depends on three parameters: the power of wind, the power curve of the turbine and the generator's ability to respond to wind fluctuations. This paper presents a control chain conversion based on a double-fed asynchronous machine (D.F.I.G) and flow-oriented. The supply system comprises two identical one converters connected to the rotor (RSC) and the other connected to the network (GSC) via a filter. The architecture of the device (Fig. 1) is up by three commands are necessary for the operation of the turbine control extraction of maximum power of the wind to control itself (MPPT) control of the RSC controlling the electromagnetic torque and stator reactive power and control of the GSC by controlling the DC bus voltage and active power and reactive power exchanged with the network. The proposed control, has been validated in both modes of operation of the three-bladed wind 7.5kw, using the Matlab / Simulink. The results of simulation control technology study provide good dynamic performance and static.

Keywords

• D.F.I.G, Variable wind speed, hypersynchronous, Energy quality, hyposynchronous.

References

1. S. Peresada, A. Tilli and A. Tonielli, ″Indirect Stator Flux-Oriented Output Feedback Control of a Doubly Fed Induction Machine″, IEEE Transactions on Control Systems and Technology, Vol. 11, No. 6, pp. 875-888, November 2003.
2. Z. X. Fang, X. D. Ping and L. Y. Bing, ″Predictive Functional Control of a Doubly Fed Induction Generator for Variable Speed Wind Turbines″, In Proceedings of the 5th World Congress on Intelligent Control and Automation, Hangzhou, pp. 3315-3319, China, June 15- , 2004.
3. G. Salloum, ″Contribution à la Commande de la Machine Asynchrone à Double Alimentation″, Thèse de Doctorat en Génie Electrique, Institut National Polytechnique de Toulouse, France, 2007.
4. Jun Yao, Hui Li, Yong Liao, and Zhe Chen, Senior Member, IEEE “An Improved Control Strategy of Limiting the DC-Link Voltage Fluctuation for a Doubly Fed Induction Wind Generator, IEEE transactions on power electronics, vol. 23, no. 3, may 2008.
5. R. Thresher et al., “The status and future of wind energy technology,” IEEE Power & Energy Magazine, vol. 5, n°6, pp. 34-46, November/December 2007.
6. R. Fadaeinedjad et al., “Simulation of a wind turbine with doubly fed induction generator by FAST and Simulink,” IEEE Trans. Energy Conversion, vol. 23, no. 2, pp. 690- , June 2008.
7. T. Senjyu et al., “Output power levelling of wind turbine generator for all operating regions by pitch angle control,” IEEE Trans. Energy Conversion, vol. 21, n°2, pp. 467-475, June 2006.
8. P. Poure, S. Saadate, M. Machmoum, “Variable speed DFIG wind energy system for power generation and harmonic current mitigation”, Renewable Energy, Volume 34, Issue 6, June 2009, Pages 1545-1553.

9. A. Gaillard, “Détection de défauts des convertisseurs de puissance à l’aide de FPGA : cas d’un système éolien base sur une Machine Asynchrone à Double Alimentation (MADA)”, Actes de la 8ième Conférence des Jeunes Chercheurs en Génie Electrique (JCGE’08), Ecole Centrale de Lyon, Ecully, France, pp. 202- 207, 16-17 décembre 2008.
10. D. Zhi and L. Xu, “Direct power control of DFIG with constant switching frequency and improved transient performance,” IEEE Trans. Energy Convers., vol. 22, no. , pp. 110-118, Mar. 2007.
11. M. I. Martinez, G. Tapia, A. Susperregui, and H. Camblong, “DFIG power generation capability and feasibility regions under unbalanced grid voltage conditions,” IEEE Trans. Energy Convers., vol. 26, no. 4, pp. 1051-1062, Dec. 2011.
12. Y. Zhou, P. Bauer, J. Ferreira, and J. Pierik, “Operation of grid-connected DFIG under unbalanced grid voltage condition,” IEEE Trans. Energy Convers., vol. 24, no. 1, pp. 240-246, Mar. 2009.
13. J. Hu and Y. He, “Modelling and enhanced control of DFIG under unbalanced grid voltage conditions,” Electr. Power Syst. Res., vol. 79, no. 2, pp. 273-281, Feb. P.E. Vidal, Etude Commande Non-linéaire d'une Machine Asynchrone à Double Alimentation, Thèse de Doctorat, INP Toulouse 2004.
14. T. Senjyu et al., “Output power levelling of wind turbine generator for all operating regions by pitch angle control,” IEEE Trans. Energy Conversion, vol. 21, n°2, pp. 467-475, June 2006. Nomenclature v ρ R Pa Ta λ Cp (λ) P (Q) φ Tem Ls (Lr) M σ Rs (Rr) θr ωr (ωs) g p GSC RSC DFIG MPPT Slip
15. Number of pole pairs Grid side converter Rotor side converter Double Fed Induction Generator Maximum point power tracking