Improved Power Quality Solutions for Power Distribution System Using Shunt Active Filter

This project presents a technique for Harmonic compensation and power factor correction of non linear loads employing Hybrid Shunt Active Power Filter. This work will focus on the design methodology and the analysis of control strategy which allows the compensation of harmonics and phase displacement of the input current, for non-linear loads. The topology of filter is based on a single phase current controlled VSI inverter with MOSFETs/IGBTs switches. Simple time domain extraction techniques are used to determine the harmonic components present in the load current or source current/voltage. The pulse width modulated (PWM) technique is then used to generate the required gate drive signals to the converter. Power factor and Harmonics problem in industrial power systems with non-linear loads is presented. Traditional and modern advanced technologies for power factor improvement and harmonic mitigation are reviewed. Advantages of power electronics based static reactive power compensation and Active Harmonic Filtering are shown. Design issues for power electronics converter operating as static compensator-Active filter are discussed. Modeling and experiment results are presented for both advanced technologies.