Enhancement of Power Quality Using the Combination of Thyristor-Controlled Reactor and Shunt Active Filter

Abstract

This paper proposes the combined system of a thyristor - controlled reactor (TCR) and the shunt active filter for harmonic and reactive power compensation. The tuned passive filter and the TCR form a shunt passive filter to compensate the reactive power. The power system harmonics are a menace to electric power system with disastrous consequences. The line current harmonics can cause increase in losses, instability and voltage distortion. Shunt active filters have been used near harmonic producing loads or at the point of common coupling to block the current harmonics. With the diverse application involving reactive power together with harmonic compensation, passive filters are found suitable. The total harmonic distortion and compensation current are carried out in MATLAB using SIMULINK. With the increase in non-linear loads in power system, more and more filters are required. The active filters are designed and analysed to improve the power quality