Analysis of sub‐synchronous resonance between DC‐side dynamics of large‐scale PV plants and nearby synchronous generators shaft

Abstract This paper investigates the dynamic interactions between large‐scale PV plants and nearby synchronous generators. To this end, a comprehensive model of plant, including arrays characteristic their voltage controller, DC/DC converter, DC‐link dynamic, DC/AC inverter controllers, output filter, is obtained. Then, eigenvalues plant are calculated, it revealed that has mode in sub‐synchronous oscillations (SSOs) range. Furthermore, modal analysis method employed, shown inductance converter capacitor significantly contribute to mode. Also, penetrate grid increase risk resonance (SSR). mechanism torsional modes generators revealed. also required conditions for these shows solar irradiation level capacitance essential factors can intensify interactions.