Coordinated FCS-MPC and Auxiliary Damping Control for Enhanced SSR Mitigation in Series-Compensated DFIG Wind Farms

Le Van Dai; Huynh Hoang Bao Nghia

doi:10.46604/peti.2026.15848

Authors

Le Van Dai Electric Power System Research Group, Faculty of Electrical Engineering Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
Huynh Hoang Bao Nghia Electric Power System Research Group, Faculty of Electrical Engineering Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam

DOI:

https://doi.org/10.46604/peti.2026.15848

Keywords:

sub-synchronous resonance, doubly-fed induction generator, finite control set model predictive control, coordinated control, Series-compensated transmission lines

Abstract

This study proposes a comprehensive and novel coordinated control framework to effectively mitigate sub-synchronous resonance (SSR) in a doubly-fed induction generator based on wind turbines connected to series-compensated transmission lines. The proposed approach integrates finite control model predictive control in the rotor-side converter to achieve fast and accurate current tracking, while an SSR damping controller is embedded in the grid-side converter (GSC). Through coordinated operation, the GSC injects an auxiliary damping signal into the q-axis current reference to suppress sub-synchronous oscillations while maintaining DC-link voltage stability. Time-domain simulations conducted under diverse operating conditions demonstrate the robustness and superior performance of the proposed scheme. In particular, the total harmonic distortion is reduced from over 2.3% to below 2.0%, and the maximum electromagnetic torque oscillation is significantly suppressed from over 1.0 pu to approximately 0.02 pu, thereby confirming the effectiveness of the proposed control strategy in enhancing overall system stability.

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