Optimal flux magnitude tracking with application to fault-tolerant control of wind turbine generators

This paper concerns with wind turbine generator fault-tolerant control that avoids system shut-down and enables safe operation with less than nominal power production. We focus on generator stator isolation inter-turn fault that can be characterized before triggering the safety device and applied for any type of generator used in wind turbines. A low complexity model predictive tracking controller is proposed to achieve very accurate flux modulation that prevents the fault propagation while power delivery under fault is deteriorated as less as possible compared to healthy machine conditions. Presented fault-tolerant control strategy is developed taking into account its modular implementation and installation in available control systems of existing wind turbines to extend their life cycle and energy production. Simulation results for the case of a 700 kW wind turbine are presented.

[1]  Afef Fekih,et al.  Fault-Tolerant Control of Wind Turbine Systems - A Review , 2011, 2011 IEEE Green Technologies Conference (IEEE-Green).

[2]  Francesco Borrelli,et al.  Constrained Optimal Control of Linear and Hybrid Systems , 2003, IEEE Transactions on Automatic Control.

[3]  Ervin Bossanyi,et al.  Wind Energy Handbook , 2001 .

[4]  Mato Baotic,et al.  On the computation of linear model predictive control laws , 2010, Autom..

[5]  M. Dalva,et al.  A survey of faults on induction motors in offshore oil industry, petrochemical industry, gas terminals and oil refineries , 1994, Proceedings of IEEE Petroleum and Chemical Industry Technical Conference (PCIC '94).

[6]  A.H. Bonnett,et al.  Increased Efficiency Versus Increased Reliability , 2008, IEEE Industry Applications Magazine.

[7]  Stig Munk-Nielsen.  Control in Power Electronics : selected problems , 2002 .

[8]  T. M. Wolbank,et al.  Increasing sensitivity of stator winding short circuit fault indicator in inverter fed induction machines , 2012, 2012 15th International Power Electronics and Motion Control Conference (EPE/PEMC).

[9]  T. M. Wolbank,et al.  State and parameter estimation for field-oriented control of induction machine based on unscented Kalman filter , 2012, International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion.

[10]  Mario Vasak,et al.  Fault-tolerant control of a wind turbine with a squirrel-cage induction generator and stator inter-turn faults , 2012, 2012 12th IEEE International Workshop on Advanced Motion Control (AMC).

[11]  Rudolph van der Merwe,et al.  The unscented Kalman filter for nonlinear estimation , 2000, Proceedings of the IEEE 2000 Adaptive Systems for Signal Processing, Communications, and Control Symposium (Cat. No.00EX373).

[12]  Z. Daneshi-Far,et al.  Review of failures and condition monitoring in wind turbine generators , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.