Three phase multilevel inverter based shunt active filter for Harmonic mitigation using hybrid control techniques

Abstract

The modern day domestic and industrial applications at low and newlinemedium voltage ranges include a proliferation of power electronic systems newlineand they are nonlinear loads on the electricity distribution system. The newlineenormous inclusion of non-linear loads in the distribution system causes the newlinepower quality of the electrical distribution network to be degraded and newlineessentially the system becomes highly polluted with harmonics. Harmonic newlinedistortion has become an important issue that needs to be addressed as close newlineto the source of harmonics as possible. newlineIn this context, the different directions of research include novel newlinetopologies, control systems and PWM techniques that directly as well as newlineindirectly help the mitigation of harmonics and improve power quality and newlinepower factor. newlineIn this thesis, the outcome of the research conducted on certain specific newlineissues, which resulted in the formulation of some specific solutions related to newlinethe issues in harmonic distortions has been proposed. The Shunt active filter newlinehas been the central or core power electronic converter focused and the newlinedifferent methods of improvement of the performance of the three-phase newlineShunt Active Power Filter (SAPF) have been analyzed. newlineThe proposed novelties include building a three-phase SAPF using newlineModular Multilevel Inverter (MMLI) with 5-level. The proposed technique newlineaddresses the source side power factor correction as well in addition to the newlinemitigation of source current harmonics. The proposed system is designed to newlineinject the required reactive power into the Point of Common Coupling (PCC). newline