Power quality improvement by using UPFC

Power system harmonics is one of the major problems in power system operation. If the harmonics can increases and decreases transmission line capacity which may cause interruption in energy supply. Therefore, flexible AC transmission system (FACTs) devices are employed to reduce this harmonics. There, are so many types of FACTs device but the unified power flow controller (UPFC) is the most versatile FACTs device that has emerged for the reduction of harmonic in power system. The main consideration of this project is to control the performance of PWM based UPFC on the bases of harmonics reduction. The proposed work is validated by using MATLAB software.