Abstract
A key component of modern power systems, the unified power flow controller (UPFC) is
designed to improve the management and flexibility of power transmission in electrical networks.
UPFC uses advanced power electronics and control algorithms to give immediate changes to
voltage magnitude, phase angle, and line impedance. This study looks at how the unified power
flow controller (UPFC) may improve electrical networks' power quality. Transmission line losses
are reduced, voltage fluctuations are minimized, and system stability is enhanced by the UPFC's
ability to dynamically control and optimize power flow. Additionally, UPFC successfully resolves
issues including voltage sags, swells, and flickers, improving the power supply's reliability and
robustness. Through a detailed analysis of its applications, this study emphasizes the significance
of unified power flow control (UPFC) technology in enhancing system performance and power
quality of electrical networks. The performance of the unified power flow controller (UPFC)
device in a network is examined in this study, with a particular emphasis on the use of PID and
FO-PID controllers for controlling active and passive power.