Design and Development of Switched Quasi Impedance Source Inverter Topologies

Abstract

Abstract newlineThe evolution of renewable sources into both distributed generation and newlinetransportation segments is continuously increasing to reduce the usage of fossil fuels newlineand their carbon emissions. According to International Renewable Energy Agency newline(IREA), solar photovoltaic (PV) generation is currently playing a pivotal role in overall newlinerenewable distributed generation and contributing a significant portion in expanding newlinetotal renewables capacity. At the same time, the hydrogen fuel cells are exploring more newlinerapidly as zero-carbon emission fuel and have great potential to drive future mobility. newlineTo extract the energy from these emerging renewable sources implies the use of a newlinepower conditioning unit (PCU). Such PCU acts as an interfacing layer between the newlinesource and customer end, i.e., grid or local load, to deal with output voltage deviations newlineagainst the climatic and load changes. Many divergent configurations of PCUs are newlineavailable, where the two-stage architecture is one of the commonly used configurations newlinewith the aforementioned renewable sources. This two-stage power conversion involves newlinea dc-dc boost converter to regulate the input voltage changes and maximize the power newlineextraction and an inverter setup to convert boosted dc into desired ac output. newlineOn the other hand, impedance source inverters (ZSIs) denote another distinct PCU newlinefamily that has the inherent boosting ability within inversion operation; hence they are newlinealso called single-stage PCUs. These single-stage PCUs have been utilized in newlinenumerous applications, such as front-end converter systems for the distributed newlinegeneration and electric vehicles. Therefore, this PCU family is evolving as a promising newlineand competitive substitute for the two-stage configurations since the first-ever ZSI newlinedevelopment in 2003. Subsequently, several research studies have been performed to newlineimprove the single-stage PCUs performance in a different perspective, such as voltage newlinegain enhancement, device stress curtailment, efficiency improvement, and size and cost newlineabatement. Among the improved