Abstract
Advancement of power electronics and fabrication of self-commutated switching devices enhanced the prominence of multilevel inverters (MLI) for high power applications. The ability of MLI to be implemented with matured medium power electronic devices and less dc-link voltagesturnedtobeaviablealternativefor bulky transformer-based powerconverterforhigh-powermedium-voltageapplications. Though, these converters have wide market penetration for input transformer-less applications, their increase in switch count for higher-levels imposed size cost and complexity limitationsand, restricted them to lower levels.Need to reduce the device count requirement of the classical MLI configurations lead to the development of Reduced Device count (RDC) MLI configurations. Among the various RDC topologies reported, T-type has most appreciable reduced in switch count. This paper presents the implementation of the cascaded T-type RDC-MLI. Further the closed performance of the considered nine-level Cascaded T-type configuration is investigated by developing a shunt active power filter. The efficacy of the inverter for power quality enhancement is demonstrated in MATLAB/Simulinkenvironment.
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