UPQC

Unified power quality conditioner (UPQC) for harmonic elimination and simultaneous compensation of voltage and current, which improves the power quality offered for other harmonic sensitive loads. UPQC consist of combined series active power filter that compensates voltage harmonics of the power supply, and shunt active power filter that compensates harmonic currents of a non-linear load. In this paper a new control algorithm for the UPQC system is optimized and simplified without  transformer voltage, load and filter current measurement, so that system performance is improved. The proposed control technique has been evaluated and tested under dynamical and steady state load conditions using PSIM software.

            The function of UPQC  is to eliminate the disturbances that affect the performance of the critical load in power system. In other words, the UPQC has the capability of improving power quality at the point of installation on power distribution systems. The UPQC, therefore, is expected to be one of the most powerful solutions to large sensitive to supply voltage flicker/imbalance.

             Here, a new simplified control algorithm for UPQC is evaluated by using simulation results given in PSIM software. The proposed control algorithm has considerably good simulation results as compared the conventional control algorithms.