Application of unified power flow controller for power quality control at demand side

This paper describes the control scheme and characteristics of the UPFC (unified power flow controller) installed at a substation near the end of the customer side, which works to improve the power quality at demand side by power conditioning. In this study, the simulation is based on the function of the instantaneous power and reactive power under the condition that UPFC has been installed near the demand side. The effectiveness of it is concluded as a result of voltage suppression and removal of harmonics distortion. UPFC, is also able to suppress the interaction between the high power supply from power plants and power generation on a small scale by consumers, and remove any harmonics distortions injected from other loads or power system networks