Design and Control for a Multiport DC-DC Boost Converter with Battery Backup for Microgrid

Abstract

With global warming reaching an alarming state and global warming becoming a real cause of concern for survival, Renewable Energy (RE) resources are gaining more importance with every passing minute. However, most renewable sources are intermittent in nature and generate a lower level voltage than is required by most applications to operate. Hence, a DC-converter becomes essential to boost the lower level voltage to a higher application level voltage. Moreover, a battery port becomes mandatory for backup storage application for load support. Multi-Port Converter (MPC) can integrate both the converter and the battery port within a single structure. This paper proposes a novel DC-DC MPC with a backup battery port. The proposed converter supports five ports including three renewable inputs, one battery and a single output port. The port is designed to support the grid and will generate an output voltage of 400 V. A PIC control-based scheme is also implemented for the proposed converter to make the outputs stabilized for fluctuating input voltage.