PV- STATCOM FOR POWER OSCILLATION DAMPING USING FUZZY LOGIC CONTROLLER

Flexible AC Transmission System (FACTS) devices like Static-Synchronous Compensators (STATCOM) have been used to improve the quality and control of power systems. This paper presents a Photovoltaic (PV) system as a STATCOM, termed PV-STATCOM, which utilizes a Fuzzy Logic Controller. The primary purpose of the STATCOM is to achieve Power Oscillation Damping (POD).During the day, when the system experiences oscillations, the PV inverter in the PV-STATCOM temporarily suspends real power generation (for a few tens of seconds) to act as a STATCOM and dampen the oscillations. Once the damping is achieved, the PV inverter’s real power generation is gradually restored to its pre-disturbance levels. This allows for faster grid power restoration compared to grid code requirements. At night, when there is no real power generation from the PV array, the PV inverters can use their full capacity to dampen power oscillations. MATLAB simulations indicate that the proposed PV-STATCOM significantly increases power transfer capacity under various oscillation modes. Furthermore, the PV-STATCOM is a more cost-effective solution for POD compared to equivalent STATCOM devices. This method has the potential to provide substantial savings for power generation and distribution companies.