Integrated Battery Management Configurations for Standalone Solar PV fed CHBMLI

Abstract

In a standalone system, it is essential to regulate the AC voltage and maintain power balance. In this paper the DC-link voltage droop method and power balance loop has been utilized with the DC side battery support. A transformerless configuration of seven-level cascaded H-Bridge multi-level Inverter (CHBMLI) has been utilized for power transfer. The sliding mode control used in this paper effectively tracks the reference AC voltage and hence balances the power whenever there is a change in load. The performance of the Solar PV (SPV) fed CHBMLI in standalone mode with battery interface has been evaluated using the simulations through PSCAD and experiments performed on LabVIEW platform using FPGA controller.