Performance of Mismatched PV Systems with Submodule Integrated Converters

Carlos Olalla, Chris Deline, Dragan Maksimovic

Research output: Contribution to journalArticlepeer-review

85 Scopus Citations


Mismatch power losses in photovoltaic (PV) systems can be reduced by the use of distributed power electronics at the module or submodule level. This paper presents an experimentally validated numerical model that can be used to predict power production with distributed maximum power point tracking (DMPPT) down to the cell level. The model allows the investigations of different DMPPT architectures, as well as the impact of conversion efficiencies and power constraints. Results are presented for annual simulations of three representative partial shading scenarios and two scenarios where mismatches are due to aging over a period of 25 years. It is shown that DMPPT solutions that are based on submodule integrated converters offer 6.9-11.1% improvements in annual energy yield relative to a baseline centralized MPPT scenario.

Original languageAmerican English
Article number6626584
Pages (from-to)396-404
Number of pages9
JournalIEEE Journal of Photovoltaics
Issue number1
StatePublished - Jan 2014

NREL Publication Number

  • NREL/JA-5200-57894


  • DC-DC converters
  • modeling and control of power electronics
  • photovoltaic modules
  • renewable energy systems
  • SubMICs
  • SubModule integrated converters


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