Multi-Rotor Virtual Machine for Grid-Forming Converter to Damp Sub-Synchronous Resonances

Grid-forming power converters (GFMC) have been widely adopted in systems as an attractive solution against the challenges imposed by ever-increasing penetration of renewables. Despite its versatility, GFMC is employed only to provide islanded operation, grid regulations, and synthetic inertia. To further extend use enhancing system stability, this paper proposes a multi-rotor virtual machine (MRVM) controller attenuate sub-synchronous oscillations. Driven formulation synchronous (VSM), proposed MRVM implements VSM-based with several rotors whose electromechanical characteristics can be individually adjusted target specific oscillatory modes system. In work, MRVM’s working principle described detail tuning guidelines are simplify selection control parameters using frequency-domain techniques eigenvalue locus analyses. validate performance MRVM, IEEE benchmark model namely, three-machine-infinite-bus It evident from results that (i) provides higher degrees freedom when dealing oscillations, (ii) outperforms conventional GFMC, especially damping intra-area