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A Novel Non-Isolated High-Gain Non-Inverting Interleaved DC-DC Converter.

Farhan Mumtaz1, Nor Zaihar Yahaya1, Sheikh Tanzim Meraj1

  • 1Department of Electrical and Electronics Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia.

Micromachines
|March 29, 2023
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Summary
This summary is machine-generated.

This study introduces a novel non-isolated interleaved DC-DC boost converter for renewable energy systems. The proposed design achieves a high voltage gain of 20 with 93.2% efficiency, reducing switch stress.

Keywords:
high gainnon-invertingnon-isolated DC–DC converterrenewable energyswitching stress

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Area of Science:

  • Electrical Engineering
  • Power Electronics
  • Renewable Energy Systems

Background:

  • Renewable energy sources (RES) like photovoltaic (PV) and fuel cells (FC) often have low output voltages.
  • High-gain DC-DC converters are crucial for integrating RES into power grids and ensuring satisfactory performance.
  • Existing solutions may face challenges with isolation, efficiency, or component stress.

Purpose of the Study:

  • To propose a novel non-isolated, non-inverting, interleaved DC-DC boost converter topology.
  • To achieve high voltage gain suitable for RES integration.
  • To reduce voltage stress on switching components and maintain high efficiency.

Main Methods:

  • A new converter topology utilizing two inductors in series and parallel configurations.
  • Implementation of a voltage multiplier technique for high voltage gain.
  • Operation in three distinct modes with two duty ratios to manage gain and component stress.
  • Steady-state analysis and prototype development (160 W, 20/400 V) for validation.

Main Results:

  • The proposed converter achieves a very high voltage gain of 20.
  • A peak efficiency of 93.2% was attained by the hardware prototype.
  • Significantly reduced voltage stress on switches, with maximum stress at 50% of the output voltage.

Conclusions:

  • The developed non-isolated interleaved DC-DC boost converter effectively addresses the need for high voltage gain in RES.
  • The intelligent design, employing two duty ratios, successfully mitigates extreme duty ratios and lowers switch voltage stress.
  • The prototype validation confirms the topology's capability to deliver high voltage gain and high efficiency, making it suitable for renewable energy applications.