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Article

Non-Isolated High-Voltage-Gain Step-Up DC–DC SISC Converter for Renewable Energy Applications

Department of Electrical Engineering, University of Ha’il, Ha’il 55476, Saudi Arabia
Processes 2026, 14(4), 640; https://doi.org/10.3390/pr14040640
Submission received: 15 January 2026 / Revised: 5 February 2026 / Accepted: 11 February 2026 / Published: 12 February 2026
(This article belongs to the Special Issue Advances in Renewable Energy Systems (2nd Edition))

Abstract

This paper presents two new step-up DC–DC converters that have high voltage gains and low voltage stresses across their main switches with respect to their output voltages. These high voltage gains are achieved with the help of voltage multiplier cells (VMCs). By inserting VMCs that are switched inductors (SIs) and switched capacitors (SCs), the voltage gains increased substantially compared to the conventional converters, such as the traditional boost converter (TBC), Luo converter, or Zeta converter. Furthermore, the TBC has a voltage stress across its main switch that equals the output voltage, while the two proposed step-up converters have voltage stresses across their main switches that are lower than their output voltages. An extended converter is obtained from the main topology, which has a higher voltage gain than the main one. This paper investigates both topologies in continuous conduction mode (CCM) operation and shows a detailed analysis deriving the voltage gain and the voltage stress between the switches. In the main topology, when the duty ratio (D) is 0.75, the output voltage equals around thirty times the input voltage. In the extended topology, when D is 0.75, the output voltage equals around sixty times the input voltage. The voltage stresses across the main switches in both topologies are half of their output voltages when D is 0.75. Simulation models using Matlab/Simulink are carried out for both the main and extended topologies, showing how these agree with the theoretical derivations.
Keywords: DC–DC converter; high voltage gain; switched inductor; switched capacitor; renewable energy DC–DC converter; high voltage gain; switched inductor; switched capacitor; renewable energy

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MDPI and ACS Style

Almalaq, Y. Non-Isolated High-Voltage-Gain Step-Up DC–DC SISC Converter for Renewable Energy Applications. Processes 2026, 14, 640. https://doi.org/10.3390/pr14040640

AMA Style

Almalaq Y. Non-Isolated High-Voltage-Gain Step-Up DC–DC SISC Converter for Renewable Energy Applications. Processes. 2026; 14(4):640. https://doi.org/10.3390/pr14040640

Chicago/Turabian Style

Almalaq, Yasser. 2026. "Non-Isolated High-Voltage-Gain Step-Up DC–DC SISC Converter for Renewable Energy Applications" Processes 14, no. 4: 640. https://doi.org/10.3390/pr14040640

APA Style

Almalaq, Y. (2026). Non-Isolated High-Voltage-Gain Step-Up DC–DC SISC Converter for Renewable Energy Applications. Processes, 14(4), 640. https://doi.org/10.3390/pr14040640

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