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A New Interleaved ZVT High Step-Up Converter with Low Count Elements for Photovoltaic Applications

Document Type : Research Article

Authors

Department of Electrical Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, P. O. Box: 81551-39998, Isfahan, Isfahan, Iran.

Abstract

A new interleaved high step-up converter with Zero Voltage Transition (ZVT) is proposed for operation in this paper. The main advantages of the proposed converter are low input current ripple and low voltage stress on the power switches, high efficiency, low total component count, and eliminating reverse recovery problem of power diodes. Due to the soft switching operation of the switches and diodes in the converter, the efficiency has been enhanced. Also, the switches do not have capacitive turn on loss due to ZVT operation. The proposed converter uses only one power switch to provide ZVT conditions for all switches and the clamp capacitor transfers its energy to the lifting capacitor, which causes increase in voltage gain of the converter. Because of the interleaved structure, the converter has a low input ripple current and this advantage makes it very suitable for solar applications. The proposed converter is analysed and a 580W prototype is made to verify theoretical analyses.
 
 

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References
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Journal of Renewable Energy and Environment
Volume 9, Issue 1
January 2022
Pages 70-77
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History
  • Receive Date: 27 April 2021
  • Revise Date: 06 August 2021
  • Accept Date: 22 August 2021
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