A Resilient Hybrid Control Framework for DFIGs: Integrating Optimal State-Feedback and Lyapunov-Based Nonlinear Compensation for Severe Grid Disturbances
Year: 2026
Type: article
Abstract: The increasing penetration of wind power into modern grids necessitates stable and resilient control of wind turbines under severe disturbances. This paper proposes a resilient hybrid control framework for Doubly-Fed Induction Generator (DFIG)-based wind turbines to enhance power support performance during and after grid faults. The proposed strategy is based on Direct Power Control (DPC), utilizing an optimal linear state-feedback controller (LQR) synergistically augmented with a nonlinear controller based on Lyapunov stability theory. This intelligent integration ensures a stable and optimal dynamic response not only under normal operation but, critically, under large transient disturbances. The nonlinear controller is specifically designed to compensate for the system's nonlinear dynamics during severe transients, and its coordinated action with the LQR significantly enhances the operational resilience of the DFIG. Time-domain simulations in MATLAB/Simulink demonstrate the proposed method's marked superiority over conventional PI-based control schemes in terms of Fault Ride-Through (FRT) capability, active grid power support, and improvement of the power system's transient stability margin. This approach not only fulfills grid code requirements under fault conditions but also provides active grid-forming support and increased flexibility for wind energy systems in high-renewable penetration environments.
Source: OICC Press Journals
Authors: Solat, Alireza, Mozafari, Babak
Language: English
Topic: Wind Turbine Control Systems
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7204155510