Nonlinear robust sliding mode - Backstepping hybrid control for WECS -theoretical design and experimental evaluation

Area of Science:

• Electrical Engineering
• Control Systems
• Renewable Energy

Background:

• Sliding Mode control (SMC) is effective for wind systems but suffers from chattering, impacting accuracy and robustness.
• Chattering in control systems leads to oscillations, affecting system performance and parametric variations.

Purpose of the Study:

• To propose a novel hybrid control strategy to mitigate the chattering phenomenon in wind energy systems.
• To enhance the control of active and reactive powers in Doubly Fed Induction Generators (DFIGs).

Main Methods:

• A hybrid approach combining Backstepping and Sliding Mode control techniques, grounded in Lyapunov theorem.
• Utilizing two converters (grid-side and machine-side) for DFIG control.
• Validation through Matlab & Simulink simulations and experimental testing on a DSPACE 1104 card.

Main Results:

• The proposed hybrid technique effectively eliminates the chattering phenomenon.
• Demonstrated significant improvements in precision errors, stability, and active/reactive power control for DFIGs.
• Validated superior performance compared to existing control techniques.

Conclusions:

• The hybrid Backstepping-Sliding Mode control offers a robust and precise solution for wind energy system optimization.
• This advanced control strategy enhances overall grid energy quality and system reliability.
• The validated results confirm the effectiveness and practical applicability of the proposed method.