Performance evaluation of Sinusoidal current control strategy unified Power Quality Conditioner

This paper focuses on Constant Sinusoidal current control strategy based simulation of UPQC (Unified Power Quality Conditioner). The proposed methodology guarantees sinusoidal current to be drawn from the supply system. In addition to this it compensates the reactive power, for which the compensated current and the source voltage are in phase. In case of non-linear loads connected to the system which draw harmonic power along with constant average power, UPQC is able to supply the harmonic power, so that harmonic components are not drawn from the supply system. The UPQC not only deals with harmonic power of the load but also deals with zero sequence power owing to imbalances in the power system. Simulation studies of UPQC for Three Phase Four Wire system with neutral point clamped topology has been performed using MATLAB R2014b for combination of Linear and non-linear loads. The results of the simulation study reveal that the current obtained from the supply system is apparently sinusoidal with a very low THD (Total Harmonic Distortion) within 0.04 percent.