A High Step-Up Z-Source DC-DC Converter for Integration of Photovoltaic Panels into DC Microgrid


This paper presents a Z-source-based high step-up DC-DC converter that benefits from high voltage gain, low voltage stress on the semiconductor devices and the capacitors. The switched-capacitor cells are integrated with the conventional Z-source impedance network resulting in a new high step-up DC-DC converter. The proposed converter is suitable for photovoltaic (PV) applications where PV panels are linked to a 400 V DC bus in a DC microgrid. The proposed converter reduces the voltage stress on the diodes and the power switch to less than half the output voltage and achieves a high-voltage gain without imposing a limitation on the duty cycle and requiring a large number of components. The operating principles, the steady-state analysis, and a comparison with other similar high step-up DC-DC converters are presented. The simulation and experimental results validate the performance and the applicability of the proposed converter.

Meeting Name

2021 IEEE Applied Power Electronics Conference and Exposition, APEC 2021 (2021: Jun. 14-17, Phoenix, AZ)


Electrical and Computer Engineering

Keywords and Phrases

DC Microgrid; High Step-Up DC-DC Converter; Photovoltaic; Switched-Capacitor Cell; Z-Source Converter

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


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Publication Date

17 Jun 2021