Harmonic Optimization For PV System Using Multilevel Inverter With Modified Switching Technique

Abstract

As per the present-day scenario, the world is confronting the day-to-day basis growing need with power in a quality form. This demand includes the use of a variety of loads including the enhanced involvement of capacitors as well as devices that are classified as non-linear. The most important factors that come into existence are harmonics with respect to the utility end. This distorts the power quality and hence the overall efficiency of the system. So, in order to maintain the performance of the supply with a state of stability comes into practice the topologies related to inverter. This encourages the research in the field of use of Photovoltaic in Multilevel Inverters so as to obtain voltages at numerous numbers of levels that proves remarkable results when compared to traditional conventional topologies. The research further focuses on the technical, economic as well as the social aspects of the included methodologies for a better power quality with reduction in Total harmonic Distortion (THD) and above all with a renewable approach. We also are facing challenges with the shortage and rapid decline in conventional sources like fossil fuels, at the utility end. It has been proved that renewable approaches are working as wonders and encouraging innovative solutions to the unending demands of the growing population that further result in their growing energy utilization needs. This has attracted the focus of many researchers in the field of renewable solutions like Solar Photovoltaics. So, the research focuses in utilization of the solar at the input supply end, with tracking the best possible radiations and utilizing the same for the proposed Multilevel inverter (MLI) technology. Further it has been proved that the design gives better solutions as we go on increasing the levels. But, the focus is on developing inexpensive, highly efficient and Novel solution, with diversified system configurations. The MLI configuration previously into existence included a large number of components that in spite of low voltage rating required a driver circuit. So, the results used to incur extra costs and highly complex. This project work proposes a topological methodology with modified switching ensuring reliability and overall efficiency to curb the voltage imbalance issues. Considering all typical MLI topologies, the cascaded design poses the lowest involvement of the components and thus, being capable of utilizing concurrent DC inputs on a single configuration. This causes the division in power conversion and the design specifically obtained in asymmetry. As, one goes on increasing the stairs the module delivers a much more stable result with the modification for simplicity and less count of components. newline