IJIRCSTJournal International Journal of Innovative Research in Computer Science and Technology I S Volume 10 Issue 4 Electrical Engineering English July - August 2022 N N Y 2022 07 18 Computer Sciences Implementation of UPFC, UPFC Along with PI and Fuzzy Based Controllers in Three Area Interconnected Power Systems for Load Frequency Control English Y 149 155 Bilal Ahmed Reshi English Y Krishna Tomar English N https://doi.org/10.55524/ijircst.2022.10.4.17 In this paper, the author intends to present the application of Unified Power Factor Controllers (UPFC) to control the frequency of three area interdependent and interconnected reheat and hydro systems by controlling the frequency of the system under disturbance due to load variations. Efficacy of the PID controllers to regulate the system dynamics has already been analyzed. By the use of fuzzy logic controllers, the system dynamics is further enhanced and the furtherance in the results is ascertained. This paper also demonstrates the superiority of Fuzzy Logic Controller (FLC) in connection with PID controllers and the UPFC. This paper also discusses the mathematical model of the system. English Static Synchronous Series Compensator (SSSC), Static Synchronous Compensator (STATCOM), Load Frequency Control (LFC), PID Controller, Fuzzy Logic Controller. https://ijircst.org/abstract.php?article_id=974