Implementation of Empirical Decomposition Control in Shunt Active Filter Based On Cascaded Multilevel Inverter with Single Excited DC Source

摘要

This paper proposes a cascaded transformer coupled multilevel inverter which acts as a shunt active filter for harmonic mitigation under different supply main condition. The proposed multi level inverter operates with a single DC-link capacitor which signifies equivalent power circulation between the modules of the inverter. The complete architecture of the developed topology is elaborated along with its control application. For harmonic current extraction an Empirical mode decomposition based control is applied to extract the fundamental load current which helps in estimating the reference current. The modulation signals are created by comparing the reference with the phase shifted PWM technique. Finally the presented control technique is applied in the developed topology of Shunt active filter and verified by simulation and hardware results.