Mathematical Analysis and Topology Derivation for a Family of Novel Dual Output High-Voltage Gain Z-Source Converter for Renewable Energy Application

Abstract

This paper presents a family of multiport Z-source converters with minimal number of switches and passive components. The paper focuses on the development of a novel converter and its methodology for selecting the topology of common ground/noncommon ground Z-source DC–DC single-input dual-output configurations, aimed at higher power density, enhancing operational efficiency, size, cost, and centralized power management across multiple ports. In comparison to conventional Z-source single input single output converters, this design achieves high-voltage conversion rates while concurrently delivering two distinct outputs with and without common ground, rendering it particularly advantageous for electric vehicle and isolated microgrid applications with renewable energy integration. The proposed converters undergo comprehensive analysis and comparison across various potential configurations. Specifically, configurations yielding equivalent output voltages are prioritized, facilitating their utility in multilevel inverter applications. The assessment encompasses the determination of maximum efficiency; voltage stresses on capacitors, diodes, and switches; inductor currents; and ripples under diverse loads and duty cycles for all configurations. Experimental results are provided to showcase the validity and capabilities of these converters. As research efforts on converter topologies continue to grow, it is expected that this paper will enhance comprehension of multiport Z-source converter topologies ideas for numerous applications.