Study on the Output Performance of DFIG under Unbalanced Grid Voltage

Abstract:

This paper uses dynamic equivalent circuits to study the impact of the unbalanced grid voltage on a Doubly Fed Induction Generator (DFIG) and draws the curves between the voltage unbalance factor (VUF) and the output characteristics of DFIG. A mathematical model of the grid and rotor side converters (GSC and RSC, respectively) is given in the stationary αβ reference frame under unbalanced network voltage conditions, which could be used in the coordinated control of the GSC and RSC. Finally, simulation studies on a 1.5MW DFIG can verify the feasibility of the proposed coordinated control strategy which can be used to improve the performance and stability of the whole wind power generation system.

• Periodical: Applied Mechanics and Materials (Volume 521)
• Pages: 292-297
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.521.292
• Online since: February 2014
• Authors: Gui Liang Yin, Rui Sun*
• Keywords: Double Fed Induction Generation (DFIG), Unbalanced Grid Voltage, Wind Power Generation

References

[1] Lie Xu, Direct Active and Reactive Power Control of DFIG for Wind Energy Generation, IEEE Trans. On Energy Conversion, VOL. 21, NO, 3, September (2006).

DOI: 10.1109/tec.2006.875472

[2] A. Tapia, G. Tapia, J.X. Ostolaza, J.R. Saenz, Modeling and control of a wind turbine driven DFIG, IEEE Trans. Energy Conversion. 18(2) (2003) 194-2-4.

DOI: 10.1109/tec.2003.811727

[3] Ehsan Javan, Ahmad Darabi. A new control strategy of DFIG-Based wind turbines under unbalanced grid voltage conditions[c] IEEE Trans. on power electronics, Feb (2011).

DOI: 10.1109/pedstc.2011.5742412

[4] Lie Xu, Yi Wang. Dynamic Modeling control of DFIG-Based wind turbines under unbalanced network conditions[c] IEEE Trans on power systems, Vol. 22, No. 1, February (2007).

DOI: 10.1109/tpwrs.2006.889113

[5] Changjin Liu, Dehong Xu. DC-Voltage fluctuation elimination through a DC-Capacitor current control for DFIG under unbalanced grid voltage conditions[c] Trans on Power electronics, Vol. 28, July. (2013).

DOI: 10.1109/tpel.2012.2223829

[6] B. I. Nass, T. M. Undeland, and T. Gjengedal, Methods for reduction of voltage unbalance in weak grids connected to wind plants, in Proc. IEEE Workshop Wind Power Impacts Power Systems, Oslo, Norway, Jun, (2002).

[7] I. Etxeberria-Otadui, A. Lopez De Heredia, H. Gaztanaga, S. Bacha, and M. R. Reyero, A single synchronous frame hybrid multi frequency controller for power active filters, IEEE Trans. Ind. Electron, vol. 53, no. 5, pp.1640-1648, Oct. (2006).

DOI: 10.1109/tie.2006.881994

[8] T. Brekken and N. Mohan, Control of a doubly-fed induction wind generator under unbalanced grid voltage conditions, IEEE Trans. Energy Conversion, vol. 22, no. 1, pp.129-135, Mar. (2005).

DOI: 10.1109/tec.2006.889550

[9] Y. Liao, H. Li, J. Yao , Operation and control of a grid connected DFIG-based wind turbine with series grid side converter during network unbalance, Electr. Power Syst. Res, vol. 81, no. 1, (2011).

DOI: 10.1016/j.epsr.2010.09.002