Resumen:
The displacement of synchronous generators by converter–interfaced renewable energy sources obliges wind farms to provide inertia, damping, and voltage support, above all in increasingly weak grid conditions. This paper presents a coordinated frequency-domain methodology for tuning all control layers of doubly-fed induction generators (DFIGs) within a wind farm operated as a Virtual Synchronous Machine (VSM).
Starting from a full small-signal linearisation that preserves loop-to-loop and machine-to-machine couplings, the procedure reshapes every local open loop to explicit phase-margin targets through a single, prioritised iteration. The resulting controllers provide a step response and stability margins close to those programmed at the design stage, in spite of the cross coupling between control loops. Since controller synthesis relies exclusively on classical loop-shaping tools available in commercial simulation suites, it is readily applicable to industrial-scale projects.
Resumen divulgativo:
The displacement of synchronous generators by converter–interfaced renewable energy sources obliges wind farms to provide inertia, damping, and voltage support, above all in increasingly weak grid conditions.
This paper presents a co-ordinated frequency-domain methodology} for tuning all control layers of doubly-fed induction generators (DFIGs) within a wind farm operated as a Virtual Synchronous Machine (VSM).
The proposed algorithms could be applied in other multi-loop control systems.
New scenarios require new control alternatives.
Palabras clave: DFIG, frequency-domain analysis, grid-forming control, multi-loop control, small-signal stability, virtual synchronous machine, weak grids
Fecha de Registro: 06-oct-2025
Cita:
J. García-Aguilar, A. García-Cerrada, J. Zamora, E.J. Bueno, E. Saiz, A. Muñoz-Babiano, M.E. Zarei, "Multi-Loop Design of Virtual Synchronous Machine Control for DFIG-Based Wind Farms", Octubre 2025. IIT-25-314WP.
