A Control Strategy for STATCOM in Alleviation of Subsynchronous Resonance in Power Systems

Flexible AC transmission systems (FACTS) have been widely utilized as a part of later past for understanding different power system steady state control issues. Moreover, series compensation of transmission lines is being done utilizing capacitor banks with the goal that general power transfer capacity can be enhanced to guarantee stable task. Anyway, this offers ascend to sub-synchronous resonance (SSR) phenomenon under which there might be trade of energy amongst mechanical and electrical system at frequencies underneath the synchronous value, harming the shaft system of generator. This paper explores the impact of FACTS devices like Static Synchronous Compensator (STATCOM) for mitigation of SSR in a single machine infinite bus system. Simulation studies have been done (i) without any FACTS devices and (ii) with FACTS devices. These investigations have demonstrated that SSR in the system can be mitigated, as it were, by utilizing STATCOM with sinusoidal pulse with modulation (SPWM). Further, mitigation of SSR is achieved by outfitting STATCOM with controller for better outcomes.