Comparative Performance Analysis of SVC, Statcom & UPFC During Three Phase Symmetrical Fault

The SVC (Static VAR Compensator) and STATCOM (Synchronous Static Compensator) are avidly used for voltage regulation in distribution and transmission systems. However, the strict modeling and device's gain and losses compensation is required to improve the overall fidelity of the system. This project outlines the modeling for STATCOM system sensitivity and transient analysis incorporating the impact of shunt devices using MATLAB/Simulink software. The system analysis explains how shunt connected FACTS devices are used for voltage stability and efficient power transfer. In an interconnected system, voltage control attains higher importance in view of power dispatch; keeping the equipment loading within safe permissible limits. STATCOM dynamic responses are analyzed with varying voltage regulation and stability factors. The effectivity of FACTS devices on the various parameters were analyzed against the desired system MVA ratings. Simulation results of newly modeled system were then compared with SVC (Static VAR Compensator) and transient responses against varying MVA ratings were analyzed. UPFC (Unified Power Flow Controller) will be next in line for a comparative analysis following the set standards by both the SVC and STATCOM. For modeling a UPFC based FACT system necessary changes will have to be made in our assumed system.