Power Quality Enhancement by UPFC Coordinated with MB-PSS Controller in Multi-machine System

In recent years, power demand has increased substantially hence it is vital to expand power transfer capacity of transmission lines but the new expansion in existing transmission system is restrained due to coincidental deliberations and commercial complications. As a result power consumers suffer from various power quality issues. In case of large disturbances and faults in power network transient stability control plays an important role in ensuring the stable operation. These problems can be overcome by increasing the available capacity of power transfer of transmission system by using FACTS devices. In this paper MB-PSS controller has been implemented with coordination of UPFC for enhancement system stability. The performance of proposed controller well checked on multi-machine two area test system. To investigate the achievements of UPFC on enhancement of dynamic voltage stability simulations has been carried out in MATLAB/Simulink software.