Transformerless High Gain Boost and Buck-Boost DC-DC Converters Based on Extendable Switched Capacitor (SC) Cell for Stand-Alone Photovoltaic System

Asim Amir, Hang Seng Che, Aamir Amir, Ahmad El Khateb, Nasrudin Abd Rahim*

*Corresponding author for this work

Research output: Contribution to journalArticle

20 Citations (Scopus)
71 Downloads (Pure)

Abstract

This paper presents transformerless high gain boost and buck-boost DC-DC converters (B-BBCs) with extendable switched capacitor cells (SCs), suitable for applications operating at high voltage, above 300 V. Boosting low voltage to a high-enough level, with low duty ratio, is beyond the practical capability of the conventional boost converter. In addition, high duty ratio needed for operation of the boost converter, results in higher component stress that suppresses the overall efficiency of the converter. Therefore, by a convenient integration of SCs with conventional B-BBCs, increased voltage gain is attained with fewer losses. Such converters can be employed for Photovoltaic (PV) systems. The operational principles and modes of operation are analyzed to justify the utility of converters for stand-alone PV systems. Moreover, the proposed modular structure allows to increase SC cells in order to obtain reduced voltage stress on switching components with a higher voltage gain. Simulation and experimental results based on 100 W laboratory prototype extol the theoretical analysis.

Original languageEnglish
Pages (from-to)212-222
Number of pages11
JournalSolar Energy
Volume171
Early online date27 Jun 2018
DOIs
Publication statusPublished - 01 Sep 2018

Keywords

  • Extendable switched capacitor (SC) cells
  • High voltage gain
  • Lower voltage stress
  • Wide input voltage variation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Transformerless High Gain Boost and Buck-Boost DC-DC Converters Based on Extendable Switched Capacitor (SC) Cell for Stand-Alone Photovoltaic System'. Together they form a unique fingerprint.

  • Cite this