Enhanced differential power processor for PV systems: Resonant switched-capacitor gyrator converter with local MPPT

Alon Blumenfeld, Alon Cervera, Mor Mordechai Peretz

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

This paper introduces an enhanced differential power processor topology and principle of operation for photovoltaic (PV) systems that is based on switched-capacitor technology, featuring local maximum power point tracking (MPPT) capability, zero current switching, high efficiency over wide-operation range, and reduced size. The new converter operates as a voltage-dependent current-source and is regulated by dead-time or frequency control. Local MPPT on the individual PV elements is realized and the operation is demonstrated by simulation and experiments. Differential power processing operation is verified using 150-W prototypes, demonstrating ultimate improvement in the power harvesting capability of above 90% and up to 99% out of the available power in the string, under different insolation levels.

Original languageEnglish
Article number6837444
Pages (from-to)883-892
Number of pages10
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Volume2
Issue number4
DOIs
StatePublished - 1 Dec 2014

Keywords

  • Differential power processing
  • digital control
  • gyrator
  • local control
  • maximum power point tracking (MPPT)
  • photovoltaic power
  • renewable energy

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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