Nonsingular Terminal Sliding Mode Based Vector Control for Stand-alone Doubly Fed Induction Generator

This investigation explores a modified vector control (VC) for stand-alone doubly fed induction generator (DFIG) based on nonsingular terminal sliding mode control (NTSMC) method. By introducing an improved oriented method, the modified VC achieves more accurate oriented process and exact terminal stator voltage for stand-alone DFIG system. The NTSMC is applied to design the rotor current controller, which makes the states converge to the sliding surface in finite time without a singular problem. Furthermore, an extended state observer (ESO) is designed to estimate the lumped disturbances, therefore reducing the dependency on the knowledge of DFIG plant. Therefore, better tracking performance of the rotor current is achieved. Finally, numerous simulation results are given to demonstrate the robustness, dynamic and static performance of the proposed approach.

[1]  Dan Sun,et al.  Backstepping-Based DPC Strategy of a Wind Turbine-Driven DFIG Under Normal and Harmonic Grid Voltage , 2016, IEEE Transactions on Power Electronics.

[2]  Jon Clare,et al.  Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation , 1996 .

[3]  Yushi Miura,et al.  Direct Voltage Control With Slip Angle Estimation to Extend the Range of Supported Asymmetric Loads for Stand-Alone DFIG , 2016, IEEE Transactions on Power Electronics.

[4]  Hong-Hee Lee,et al.  Performance Enhancement of Stand-Alone DFIG Systems With Control of Rotor and Load Side Converters Using Resonant Controllers , 2012, IEEE Transactions on Industry Applications.

[5]  Yuan Guofeng,et al.  Vector control of a doubly fed induction generator for stand-alone ship shaft generator systems , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[6]  Jiabing Hu,et al.  Sliding-mode-based direct power control of grid-connected voltage-sourced inverters under unbalanced network conditions , 2011 .

[7]  Hong-Hee Lee,et al.  Stationary frame control scheme for a stand-alone doubly fed induction generator system with effective harmonic voltages rejection , 2011 .

[8]  G. Abad,et al.  Direct Power Control of Doubly-Fed-Induction-Generator-Based Wind Turbines Under Unbalanced Grid Voltage , 2010, IEEE Transactions on Power Electronics.

[9]  Heng Nian,et al.  Direct Active and Reactive Power Regulation of DFIG Using Sliding-Mode Control Approach , 2010, IEEE Transactions on Energy Conversion.

[10]  G. Tapia,et al.  Sliding-mode control of a DFIG-based wind turbine under non-ideal grid voltages , 2013 .

[11]  J.C. Clare,et al.  Vector control of a diesel-driven doubly fed induction machine for a stand-alone variable speed energy system , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[12]  Lei Shang,et al.  Sliding-Mode-Based Direct Power Control of Grid-Connected Wind-Turbine-Driven Doubly Fed Induction Generators Under Unbalanced Grid Voltage Conditions , 2012, IEEE Transactions on Energy Conversion.