Single Phase to Three Phase Unified Power Quality Conditioner

Mitigating power quality issues in distribution systems is of utmost importance to both electricity consumers and suppliers as it improves the distribution system’s efficiency, reduces electricity costs, maintains continuous supply, and diminishes the requirement for frequent maintenance. Custom power devices were introduced to eliminate power quality issues like voltage sags, swells, transients, imbalances, and current harmonics arising in distribution systems. Unified power quality conditioner (UPQC) is one such frequently used custom power device that enhances the power quality of distribution systems. Now days the usage of three phase loads is increasing gradually, therefore it is much required to get access to the three-phase distribution system. UPQC 1-ph-to-3-ph uses dual compensation principle makes possible to draw sinusoidal current, in phase with the grid voltage, from the single-phase grid to improve the power quality. The system compensates the voltage disturbances such as voltage sag, voltage swell and other voltage unbalances. The proposed system allows the balanced and regulated voltage with lower harmonic content. The present paper analyzes the compensation and control strategies using PI controller. The control strategies are simulated using MATLAB/SIMULINK. Keywords— Power quality (PQ), unified power quality conditioner (UPQC), Series and Shunt active power filter