Sensorless Field Oriented Control of DFIGs Using a Rotor-Current-Based MRAS Observer under Grid Voltage Dip
Subject Areas : electrical and computer engineeringKeywords: Sensorless control vector control DFIG RCMO,
Abstract :
This paper proposes a new application of sensorless control method for doubly fed induction generator (DFIG) using rotor-current-based MRAS observer (RCMO) under grid voltage dip. MRAS means model reference adaptive system. In this paper the method of control of DFIG is vector control VC (or field oriented control FOC). The position and speed of rotor are estimated by RCMO instead of measuring. DFIG is connected to a grid with a balanced voltage dip on PCC and is tested by large variation in rotor speed. Simulation results using MATLAB/Simulink are presented for a 2-MW DFIG. The simulation results show the decoupled control of active and reactive power of DFIG in three conditions: a) normal voltage of grid b) grid voltage dip c) huge variation at wind speed. The results show that the estimated speed of rotor and power produced in DFIG carefully follows the references. The conclusion of simulation results is that for decoupled control of active and reactive power of DFIG, application of RCMO method is favorable and acceptable under balanced voltage dips and variable speed wind as well as conventional VC.
[1] G. Abad, Doubly Fed Induction Machine, John Wiley & Sons, Inc., Publication, IEEE Press, 2011.
[2] M. A. Asha Rani, C. Nagamani, G. Saravana Ilango, and A. Karthikeyan, "An effective reference generation scheme for DFIG with unbalanced grid voltage," IEEE Trans. on Sustainable Energy, vol. 5, no. 3, pp. 1010-1018, Jul. 2014.
[3] H. Nian, P. Cheng, and Z. Q. Zhu, "Independent operation of DFIG-based WECS using resonant feedback compensators under unbalanced grid voltage conditions," IEEE Trans. on Power Electronics, vol. 30, no. 7, pp. 3650-3661, Jul. 2015.
[4] M. Malinowski, M. P. Kazmierkowski, S. Hansen, F. Blaabjerg, and G. D. Marques, "Virtual-flux-based direct power control of three-phase PWM rectifiers," IEEE Trans. Ind. Appl., vol. 37, no. 4, pp. 1019-1027, Jul./Aug. 2001.
[5] M. Abolhassani, P. Niazi, H. Toliyat, and P. Enjeti, "A sensorless integrated doubly-fed electric alternator/active filter (IDEA) for variable speed wind energy system," in Proc. 38th IEEE IAS Annu. Meeting, pp. 507-514, 12-16 Oct. 2003.
[6] R. Datta and V. T. Ranganathan, "A simple position-sensorless algorithm for rotor-side field-oriented control of wound-rotor induction machine," IEEE Trans. Ind. Electron., vol. 48, no. 4, pp. 786-793, Aug. 2001.
[7] L. Morel, H. Godfroid, A. Mirzaian, and J. M. Kauffmann, "Double-fed induction machine: converter optimisation and field oriented control without position sensor," IEE Proceedings - Electric Power Applications Elect. Power Appl., vol. 145, no. 4, pp. 360-368, Jul. 1998.
[8] E. Bogalecka and Z. Krzeminski, "Sensorless control of a double-fed machine for wind power generators," in Proc. EPE-PMC, Dubrovnik and Cavtat, Croatia, 2002.
[9] B. Hopfensperger, D. J. Atkinson, and R. A. Lakin, "Stator-flux-oriented control of a doubly-fed induction machine with and without position encoder," IEE Proceedings - Electric Power Applications Elect. Power Appl., vol. 147, no. 4, pp. 241-250, Jul. 2000.
[10] O. A. Mohammed, Z. Liu, and S. Liu, "A novel sensorless control strategy of doubly fed induction motor and its examination with the physical modeling of machines," IEEE Trans. Magn., vol. 41, no. 5, pp. 1852-1855, May 2005.
[11] L. Xu and W. Cheng, "Torque and reactive power control of a doubly fed induction machine by position sensorless scheme," IEEE Trans. Ind. Appl., vol. 31, no. 3, pp. 636-642, May/Jun. 1995.
[12] C. Schauder, "Adaptive speed identification for vector control of induction motors without rotational transducers," IEEE Trans. Ind. Appl.,vol. 28, no. 5, pp. 1054-1061, Sep./Oct. 1992.
[13] R. Ghosn, C. Asmar, M. Pietrzak-David, and B. De Fornel, "A MRAS sensorless speed control of doubly fed induction machine," in Proc. Int.Conf. Elect. Mach., pp. 90-92,. 2002.
[14] R. Ghosn, C. Asmar, M. Pietrzak-David, and B. De Fornel, "A MRAS-Luenberger sensorless speed control of doubly fed induction machine," in Proc. Eur. Power Electron. Conf., 2003.
[15] R. Cardenas, R. Pena, J. Proboste, G. Asher, and J. Clare, "MRAS observer for senseless control of standalone doubly fed induction generators," IEEE Trans. Energy Convers., vol. 20, no. 4, pp. 710-718, Dec. 2005.S [16] R. Pena, R. Cardenas, J. Proboste, G. Asher, and J. Clare, "Sensorless control of doubly-fed induction generators using a rotor-current-based MRAS observer," IEEE Trans. Ind. Electron., vol. 55, no. 1, pp. 330-339, Jan. 2008.
[17] R. Pena, R. Cardenas, J. Proboste, G. Asher, and J. Clare, "Sensorless control of a slip ring induction generator based on rotor current MRAS observer," in Proc. 36th IEEE Power Electronics Specialists Conf., PESC'05, pp. 2508-2513, 16-16 Jun. 2005.
[18] M. S. Carmeli, M. Iacchetti, and R. Perini, "A MRAS observer applied to sensorless doubly fed induction machine drives," in Proc. IEEE Int. Symp. on Industrial Electronics, ISIE'10, pp. 3077-3082, 26-30 Mar. 2010.
[19] F. Castelli-Dezza, G. Foglia, M. F. Iacchetti, and R. Perini, "An MRAS observer for sensorless DFIM drives with direct estimation of the torque and flux rotor current components," IEEE Trans. Power Electron., vol. 27, no. 5, pp. 2576-2584, May 2012.
[20] B. Mwinyiwiwa, Y. Zhang, B. Shen, and B. T. Ooi, "Rotor position phase-locked loop for decoupled P-Q control of DFIG for wind power generation," IEEE Trans. Energy Convers., vol. 24, no. 3, pp. 758-765, Sep. 2009.
[21] K. Gogas, G. Joos, B. T. Ooi, Y. Z. Zhang, and B. Mwinyiwiwa, "Design of a robust speed and position sensorless decoupled P-Q controlled doubly-fed induction generator for variable-speed wind energy applications," in Proc. IEEE Canada Electrical Power Conf., EPC'07, pp. 62-67, 25-26 Oct. 2007.
[22] R. Cardenas, R. Pena, S. Alepuz, and G. Asher, "Overview of control systems for the operation of DFIGs in wind energy applications," IEEE Trans. on Ind. Elec., vol. 60, no. 7, pp. 2776-2798, Jul. 2013.
[23] L. Xu and Y. Wang, "Dynamic modeling and control of DFIG-based wind turbines under unbalanced network conditions," IEEE Trans. Power Sys., vol. 22, no. 1, pp. 314-323, Feb. 2007.