Article

Apurva A Bhalerao, P.R.Pote college of engineering, Prof. Pritee R. Rane, P.R.Pote college of engineering

The maintenance and reliability of the power system has become a major aspect of study. The existing network is mechanically controlled, though we provide control and protection system which are electronics, computer, microcontroller based but the signal which is provided to the circuit where final action is carried out is completely mechanically controlled which reduced efficiency of the system. The solution is the use of FACTS devices especially the use of unified power flow controller (UPFC).The FACTS is nothing but to make system more flexible to adapt the variation due to occurrence of faults. In this paper the study of UPFC with its mathematical modeling. Second, the operation of control system used in its converters is also studied. Finally by help of modeling of a power system in MATLAB and by installing UPFC in transmission link, its use as power flow controller and voltage injection is seen. Conclusion is made on different results i.e. voltage profile, phase angle and active and reactive power to see the benefit of UPFC in power system. The paper explains the basic theory and operating characteristics of the unified power flow controller with mathematical modeling of photovoltaic system and then this model is implemented to three phase system.