IMPROVEMENT OF POWER QUALITY USING MULTILEVEL INVERTER BASED SHUNT ACTIVE POWER FILTER

A Multi - Level Inverter (MLI) based Shunt Active Power Filter(APF) is represented in this paper. SingleMLI - APF is used as both Interfacing converters for improvement of Power Quality of the Whole system. Use of MLIs reduces stress on power electronic devices because they can be made to operate at low voltages compared to the conventional two level converters. The output voltage provided by MLIs has small voltage steps, that results in good power quality and low - harmonic components. As Majority of the Renewabl e systems comprises at least two converters for these tasks, the proposed system may be treated as simple and economical in meeting the same objectives.Peak detection method of control strategy is employed in MLI - APF for power quality improvement. The prop osed system is simulated using MATLAB/SIMULINK and tested for power quality improvement.