A Review of Galvanically Isolated Impedance-Source DC-DC Converters

• Published in: IEEE transactions on power electronics Vol. 31; no. 4; pp. 2808 - 2828
• Main Authors: Chub, Andrii, Vinnikov, Dmitri, Blaabjerg, Frede, Peng, Fang Zheng
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Alternative energy sources; DC-DC power converters; DCDC power converters; Electric currents; Electricity distribution; galvanic isolation; impedance-source converters; Inductors; Inverters; renewable energy sources; Switches; Transformers; Voltage control; DC–DC power converters; renewable energy sources; galvanic isolation; impedance-source (IS) converters
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2015.2453128

Impedance-source converters, an emerging technology in electric energy conversion, overcome limitations of conventional solutions by the use of specific impedance-source networks. Focus of this paper is on the topologies of galvanically isolated impedance-source dc-dc converters. These converters are particularly appropriate for distributed generation systems with renewable or alternative energy sources, which require input voltage and load regulation in a wide range. We review here the basic topologies for researchers and engineers, and classify all the topologies of the impedance-source galvanically isolated dc-dc converters according to the element that transfers energy from the input to the output: a transformer, a coupled inductor, or their combination. This classification reveals advantages and disadvantages, as well as a wide space for further research. This paper also outlines the most promising research directions in this field.