Active Fault Tolerant Control of Wind Turbine Systems using Disturbance Observer-based Sliding Mode and Time Delay Estimation

Document Type : Research Article

Authors

1 School of Mechanical Engineering, ShahidBeheshtiUniversity, Tehran, Iran.

2 shahid beheshti university

Abstract

In this paper, an active fault tolerant control based on time delay control, sliding mode, and nonlinear disturbance observer is proposed to control the pitch subsystem in the presence of actuator faults and uncertainties. Time delay estimation is applied as a fault estimation algorithm for detection and compensation. Then, a robust control law is synthesized to nullify uncertainty and fault effects using a combination of sliding mode, disturbance observer, and time delay with novel adaptation laws. In order to mitigate chattering which comes from the discontinuous control term, a nonlinear disturbance observer is designed. Through the proposed structure, the discontinuous gain is reduced significantly which leads to chattering reduction. Stability analysis is conducted through Lyapunov Theory. Moreover, wind speed profiles are generated using TurbSim, and simulations are performed based on a nonlinear two-mass wind turbine model and implemented in the FAST environment to verify the validity of the designed controllers. Finally, results reveal the effectiveness of the proposed controller compared to feedback linearization and gain-schedule proportional-integral controllers in the presence of uncertainty and different actuator faults such as hydraulic leakage, pump wear, and high air content in the oil.

Keywords

Main Subjects


[1] B. Boukhezzar, L. Lupu, H. Siguerdidjane, M. Hand, Multivariable control strategy for variable speed, variable pitch wind turbines, Renewable Energy, 32(8) (2007) 1273-1287
[2] E. Muljadi, C. P. Butterfield, Pitch-controlled variable-speed wind turbine generation, IEEE transactions on Industry Applications, 37(1) (2001) 240-246. 
[3] S. Park, Y. Nam, Two LQRI based blade pitch controls for wind turbines, Energies, 5 (2012) 1998-2016.
[4] A. Fakharzadeh, F. Jamshidi, L. Talebnezhad, New approach for optimizing energy by adjusting the trade-off coefficient in wind turbines, Energy, sustain. Soc, 13 (9) (2013) 1-8.
[5] L. Pao, K. Johnson, A tutorial on the dynamics and control of wind turbines and wind farms, in: Proc. American Contr. Conf., St. Louis, USA, (2009) 2076-2089.
[6] V. Makvana, R. Ahir, D. Patel, J. Jadhav, Study of PID controller based pitch actuator system for variable speed HAWT using matlab, Int. J. Innova. Res. Sci. Eng. Tech., 2 (5) (2013) 1496-1504.
[7] Y. Kim, H. Chung, S. Moon, Tuning of the PI controller parameters of a PMSG wind turbine to improve control performance under various wind speeds, Energies, 8 (2015) 1406-1425.
[8] Song, Y. D., Dhinakaran, B., & Bao, X. Y. Variable speed control of wind turbines using nonlinear and adaptive algorithms. Journal of Wind Engineering and Industrial Aerodynamics, 85(3) (2000) 293-308.
[9] Bossanyi, E. A. Individual blade pitch control for load reduction. Wind energy, 6(2) (2003) 119-128.
[10] Sandquist, F., Moe, G., & Anaya-Lara, O. Individual pitch control of horizontal axis wind turbines. Journal of Offshore Mechanics and Arctic Engineering, 134(3) (2012).
[11] Yin, X. X., Lin, Y. G., Li, W., & Gu, Y. J.. Integrated pitch control for wind turbine based on a novel pitch control system. Journal of Renewable and Sustainable Energy, 6(4) (2014).
[12] Lescher F, Zhao JY, Borne P, Robust gain scheduling controller for pitch regulated variable speed wind turbine. Stud Inform Control 14 (2005) 299–315
[13] Bianchi, F. D., Mantz, R. J., & Christiansen, C. F. (2005). Gain scheduling control of variable-speed wind energy conversion systems using quasi-LPV models. Control Engineering Practice, 13(2) 247-255.
[14] Beltran, B., Ahmed-Ali, T., & Benbouzid, M. E. H. Sliding mode power control of variable-speed wind energy conversion systems. IEEE Transactions on Energy Conversion, 23(2) (2008) 551-558.
[15] Assareh, E., & Biglari, M. A novel approach to capture the maximum power from variable speed wind turbines using PI controller, RBF neural network and GSA evolutionary algorithm. Renewable andSustainable Energy Reviews, 51 (2015) 1023-1037.
[16] Rahimi, M. Drive train dynamics assessment and speed controller design in variable speed wind turbines. Renewable Energy, 89 (2016) 716-729.
[17] H. Moradi, G. Vossoughi, Robust control of the variable speed wind turbines in the presence of uncertainties: A comparison between H∞ and PID controllers, Energy, 90 (2015) 1508-1521.
[18] Fazlollahi, V., & Taghizadeh, M. Modelling and design of dynamic feedback controller with wind speed estimator, in variable speed wind turbines. Modares Mechanical Engineering, 16(4) (2016) 361-371 (in persian).
[19] Y. Ait El Maati, L. El Bahir, K.Faitah, “Fault Tolerant Control of Internal Faults in Wind Turbine: Case Study of Gearbox Efficiency Decrease”, International Journal of Rotating Machinery, 2018.
[20] K. S. Xiahou, Y. Liu, M. S. Li, and Q. H. Wu, “Sensor fault-tolerant control of DFIG based wind energy conversion systems”, International Journal of Electrical Power & Energy Systems, 117 (2020) 55-63
[21] A. Azizi, H. Nourisola, S. Shoja-Majidabad, “Fault tolerant control of wind turbines with an adaptive output feedback sliding mode controller”, Renewable energy, 135 (2019) 55-65.
[22] Y. Vidal,  C. Tutivén, J. Rodellar, L. Acho, “Fault diagnosis and fault-tolerant control of wind turbines via a discrete time controller with a disturbance compensator”, Energies, 8(5) (2015) 4300-4316.
[23] Habibi, Hamed, Hamed Rahimi Nohooji, and Ian Howard. "Adaptive PID control of wind turbines for power regulation with unknown control direction and actuator faults." IEEE Access 6 (2018) 37464-37479.
[24] C. Sloth, T. Esbensen, and J. Stoustrup, “Robust and fault-tolerant linear parameter-varying control of wind turbines,” Mechatronics, 21(4) (2011) 645–659.
[25] M. Sami and R. J. Patton, “Fault tolerant adaptive sliding mode controller for wind turbine power maximisation,” in Proceedings of the 7th IFAC Symposium on Robust Control Design, Aalborg, Denmark, 2012.
[26] Lee, Hoon, and Vadim I. Utkin. "Chattering suppression methods in sliding mode control systems." Annual reviews in control 31(2) (2007) 179-188.
[27] D. Malcolm, A. Hansen, WindPACT Turbine Rotor Design Study, National Renewable Energy Laboratory (NREL), Golden, 2003.
[28] J. Carroll, A. McDonald, D. McMillan, Failure rate, repair time and unscheduled O&M cost analysis of offshore wind turbines, Wind Energy 19(6) (2016) 1107-1119.
[29] A. Kumar, K. Stol, Simulating Feedback Linearization control of wind turbines using high‐order models, Wind Energy, 13(5) (2010) 419-432.
[30] S. C. Thomsen, Nonlinear control of a wind turbine,  Thesis, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark, (2006).
[31] Y. Ren, L. Li, J. Brindley, L. Jiang, Nonlinear PI control for variable pitch wind turbine, Control Engineering Practice, 50 (2016) 84-94
[32] W.-H. Chen, J. Yang, L. Guo, S. Li, Disturbance-observer-based control and related methods–an overview, IEEE Trans. Ind. Electron. 63 (2) (2016) 1083–1095.
[33] W.-H. Chen, Nonlinear disturbance observer-enhanced dynamic inversion control of missiles, J. Guid. Control Dyn. 26(1) (2003) 161–166.
[34] E. B. Muhando, T. Senjyu, A. Uehara, T. Funabashi, Gain-Scheduled H∞ Control for WECS via LMI Techniques and Parametrically Dependent Feedback Part II: Controller Design and Implementation, IEEE Transactions on Industrial electronics, 58(1) 57-65 (2011).
[35] K. Youcef-Toumi and O. Ito, “A time delay controller for systems with unknown dynamics,” J. Dyn. Syst. Meas. Control, 112(1) (1990) 133–142.
[36] Y. Shtessel, C. Edward, L. Fridman, A. Levant, Sliding Mode Control and Observation, Springer, (2014).
[37] Y. Shtessel, C. Edward, L. Fridman, A. Levant, Sliding Mode Control and Observation, Springer, (2014).