Decoupled and Distributed Maximum Power Point Tracking of Series-Connected Photovoltaic Submodules Using Differential Power Processing

Roy Bell, Robert Carl Nikolai Pilawa Podgurski

Research output: Contribution to journalArticlepeer-review

Abstract

This paper describes a distributed maximum power point tracking control scheme for photovoltaic (PV) systems at the submodule level. The system employs isolated differential power processing (DPP) converters that require no perturb and observe synchronization and little communication among power converters themselves. Design and benefits of this architecture with respect to control, communication, and converter efficiency are analyzed. Isolated dc-dc converter prototypes are constructed and employed within a string of series-connected PV submodules to experimentally validate the proposed control method. An experimental extraction efficiency of 99.12% is achieved for a three submodule connection with ∼30 % mismatch - a 10.19% improvement from the conventional, non-DPP architecture.

Original languageEnglish (US)
Article number7236878
Pages (from-to)881-891
Number of pages11
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Volume3
Issue number4
DOIs
StatePublished - Dec 2015

Keywords

  • Differential power processing
  • digital control
  • distributed control
  • maximum power point trackers
  • photovoltaic systems

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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