Designing UPFC with Controller Driving Dual Converter Topology in a Grid Integrated PV System

Renewable energy source (RES)-based electricity generating plants are expensive and complicated, requiring controls to deal with the energy input's intermittent renewables and fluctuation. If the grid interface of these devices is not monitored and maintained within the norms, it presents a problem of providing electricity to the utilities. Thus researchers have discusses several grid interface and control strategies for RES-based generators. This paper discusses the technique of improving power quality by using UPFC (Unified Power Flow Control) having  PI controller.