Eleven-level Cascaded Inverter and Advanced Control Technique for Solar-battery Operation

Abstract

This manuscript proposes a novel elven-level cascaded inverter (11-CI) to offer better coordination and PQ in PV -battery-based microgrid operation. The significance of the inverter is justified by using lesser switching requirements, simpler in design and economic operation. In addition to that, mostly preferred PO-based maximum power point algorithm is used to adjust the duty ratio of the boost converter and extract maximum dc-link voltage. Further, an energy storage system with a dc-dc converter is integrated to circumvent the excess load demand and varied climate conditions. However, the operation of the inverter and bidirectional converter action depends upon the controller action. Therefore, a combined bidirectional converter and the 11-CI-based advanced controller are proposed with reduced complexity. The developed 11-CI-based advanced controller performance is studied and justified by comparing the outcomes obtained from the proposed and traditional inverter-based controller. The findings show increased voltage levels, better regulation, and synchronized operation achieved with lesser harmonic components during non-linear load action.