Sliding-Mode Control for a DFIG-Based Wind-Power Generation System with Series Grid-Side Converter under Unbalanced Grid Voltage Conditions

Document Type : Article

Authors

Department of Electrical Engineering, University of Shahrekord, Shahrekord, Iran

Abstract

In this paper, the power quality in a wind power generation system is studied. It is shown that adding a Series Grid-Side Converter (SGSC) to the Doubly Fed Induction Generator (DFIG) structure and applying a suitable control algorithm will make the system be able to compensate the adverse effects of the voltage unbalance and consequently can improve the power quality. In order to decrease design complexity and implement the control algorithms in the stationary reference frame, a Sliding-Mode Control (SMC) method for controlling of the DFIG system with SGSC is proposed. One of the advantages of the proposed method in this paper is its robustness to parameter variations both in the DFIG and the connected network. Moreover, the designed controller leads to a fast dynamic response. It should be mentioned that, a coordinated control carries out between SGSC with the other DFIG converters. The simulation results approve the validity of the mentioned advantages and the effectiveness of the proposed method.

Keywords

Main Subjects


References
1. Muljadi, E., Batan, T., Yildirim, D., and Butter eld,
C.P. \Understanding the unbalanced-voltage problem
in wind turbine generation", Proc. Ind. Appl. Conference,
pp. 1359-1365, IEEE press (1999).
2. Brekken, T. and Mohan, N. \A novel doubly-fed
induction wind generator control scheme for reactive
power control and torque pulsation compensation under
unbalanced grid voltage conditions", PowerExpo.
Spec. Conference, pp. 760-766 (2003).
3. Piwko, R.N., Miller, N., Sanchez-Gasca, J., Yuan, X.,
Dai, R., and Lyons, J. \Integrating large wind farms
into weak power grids with long transmission lines",
Proc. Power Electron. Motion Control Conf., pp. 1122-
1128 (2006).
4. Kiani, M. and Lee, W.J. \E ects of voltage unbalance
and system harmonics on the performance of doublyfed
induction wind generators", IEEE Trans. Ind.
Appl., pp. 562-568 (2010).
5. Muller, S., Deicke, M., and De Doncker, R.W. \Fed
induction generator systems for wind turbines", IEEE
Ind. Appl. Mag., pp. 26-33, IEEE Press (2003).
6. Hu, J. and He, Y. \Dynamic modeling and robust
current control of wind-turbine used DFIG during AC
voltage dip", J. Zhejiang Univ. Sci. A, pp. 1757-64
(2006).
7. Pena, R., Clare, J.C., and Asher, G.M. \Doubly fed
induction generator using back-to-back PWM converter
and is application to variable-speed wind energy
generation", Proc. IEE B Electr. Power Appl., pp. 231-
241 (1996).
8. Xu, L. and Cheng, W. \Torque and reactive power
control of a doubly fed induction machine by position
sensorless scheme", IEEE Trans Ind., pp. 636-42
(1995).
9. Xu, L. and Wang, Y. \Dynamic modeling and control
of DFIG based wind turbines under unbalanced network
conditions", IEEE Trans Power Syst., pp. 314-
323, IEEE press (2003).
10. Xu, L. \Coordinated control of DFIG's rotor and
grid side converters during network unbalance", IEEE
Trans Power Electron, pp. 1041-104 (2008).
11. Hu, J. and He, Y. \DFIG wind generation systems operating
with limited converter rating considered under
unbalanced network conditions-analysis and control
design", Renewable Energy, pp. 829-847 (2011).
12. Hu, J., He, Y., Xu, L., and Williams, B.W. \Improved
control of DFIG systems during network unbalance
using PI-R current regulators", IEEE Trans Ind. Electron,
pp. 439-451 (2009).
13. Lai, Y.S. and Chen, J.H. \A new approach to direct
torque control of induction motor drives for constant
inverter switching frequency and torque ripple reduction",
IEEE Trans Energy Convers, pp. 220-227
(2001).
14. Kang, J.K. and Sul, S.K. \New direct torque control
of induction motor for minimum torque ripple and
constant switching frequency", IEEE Trans Ind., pp.
1076-1082, IEEE press (1999).
15. Datta, R. and Ranganathan, V.T. \Direct power control
of grid-connected wound rotor induction machine
without rotor position sensors", IEEE Trans Power
Electron, pp. 390-399 (2001).
16. Xu, L. and Cartwright, P. \Direct active and reactive
power control of DFIG for wind energy generation",
IEEE Trans Energy Convers, pp. 750-758 (2006).
17. Abad, G., Rodriguez, M.A., and Poza, J. \Two-level
VSC-based predictive torque control of the doubly fed
induction machine with reduced torque and
ux ripples
at low constant switching frequency", IEEE Trans
Power Electron, pp. 1050-1061 (2008).
18. Abad, G., Rodriguez, M.A., and Poza, J. \Twolevel
VSC-based predictive direct power control of
the doubly fed induction machine with reduced power
ripple at low constant switching frequency", IEEE
Trans Energy Convers, pp. 570-580 (2008).
19. Kazemi, M.V., Yazdankhah, A.S., and Kojabadi, H.M.
\Direct power control of DFIG based on discrete space
vector modulation", Renewable Energy, pp. 1033-1042
(2010).
S. Abazari and S. Farajzadeh Dehkordi/Scientia Iranica, Transactions D: Computer Science & ... 25 (2018) 1507{1522 1521
20. Zhi, D. and Xu, L. \Direct power control of DFIG with
constant switching frequency and improved transient
performance", IEEE Trans Energy Convers, pp. 110-
118 (2007).
21. Hu, J., Nian, H., Hu, B., He, Y., and Zhu, Z.Q. \Direct
active and reactive power regulation of DFIG using
sliding-mode control approach", IEEE Trans. Energy
Convers, pp. 1028-1039 (2010).
22. Susperregui, A., Tapia, G., Zubia, I., and Ostolaza,
J.X. \Sliding-mode control of doubly-fed generator for
optimum power curve tracking", Electron. Lett., pp.
126-127 (2010).
23. Machmoum, M. and Poitiers, F. \Sliding-mode control
of a variable speedwind energy conversion system
with DFIG", Proc. Ecol. Veh. Renewable Energies Int.
Conf. Exhibit., pp. 1-7 (2009).
24. Zheng, X., Li, L., Xu, D., and Platts, J. \Sliding-mode
MPPT control of variable speed wind power system",
Proc. Power Energy Eng. Conf., Wuhan, China, pp.
1-4 (2009).
25. Chen, S.Z., Cheung, N., Wong, K.C., and Wu, J. \Integral
sliding-mode direct torque control of doubly-fed
induction generators under unbalanced grid voltage",
IEEE Trans. Energy Convers., pp. 356-368 (2010).
26. Itsaso Martinez, M., Tapia, G., Susperregui, A., and
Camblong, H. \Sliding-mode control for DFIG rotorand
grid-side converters under unbalanced and harmonically
distorted grid voltage", IEEE Trans. Energy
Convers., pp. 328-338 (2012).
27. Shang, L. and Hu, J. \Sliding-mode-based direct power
control of grid-connected wind-turbine-driven doubly
fed induction generator under unbalanced grid voltage
condition", IEEE Trans. on Energy Conversion, pp.
362-373 (2012).
28. Flannery, P.S. and Venkataramanan, G. \Unbalanced
voltage sag ride-through of a doubly fed induction
generator wind turbine with series grid-side converter",
IEEE Trans. Ind., pp. 1879-1887 (2009).
29. Liao, Y., Li, H., Yao, J., and Zhuang, K. \Operation
and control of a grid connected DFIG-based wind
turbine with series grid-side converter during network
unbalance", Electr. Power Syst. Res., pp. 228-236
(2011).
30. Yao, J., Li, H., Chen, Z., Xia, X., Chen, X., Li,
Q., and Liao, Y. \Enhanced control of a DFIG-Based
wind-power generation system with series grid-side
converter under unbalanced grid volt-age conditions",
IEEE Trans. Power Electron., pp. 3167-3180 (2013).
31. Yao, J., Li, Q., Hen, Z., and Liu, A. \Coordinated
control of a DFIG-based wind-power generation system
with SGSC under distorted grid voltage conditions",
Energies, pp. 2541-2561 (2013).
32. Abazari, S., Farajzadeh, S. and Taghipour, S. \Enhanced
control of a DFIG-based system by slidingmode
control method during network disturbances",
Turkish Journal of Electrical Engineering & Computer
Sciences, 24(5), pp. 3198-3212 (2016).
33. Utkin, V. \Sliding-mode control design principles and
applications to electric drives", IEEE Trans. Ind.
Electronics, pp. 23-36, IEEE press (1993).
34. Stephen, J., land, K., and Neumann, M., Group
Inverses of M-Matrices and their Application, Chapman
& Hall/CRC Applied Mathematics & Nonlinear
Science (2012).

Volume 25, Issue 3
Transactions on Computer Science & Engineering and Electrical Engineering (D)
May and June 2018
Pages 1507-1522
  • Receive Date: 02 October 2015
  • Revise Date: 30 July 2016
  • Accept Date: 03 October 2016