Ripple-port module-integrated inverter for grid-connected PV applications

Souhib Harb, Mehran Mirjafari, Robert S. Balog

Research output: Contribution to journalArticle

48 Citations (Scopus)


The single-phase inverter has inherent double-frequency power ripple, which if not internally mitigated, appears at the input port and deteriorates the maximum power point tracker performance. Conventional dc link inverter topologies filter this significant double-frequency ripple by means of the bus capacitance, usually in the form of electrolytic capacitors, which have well known lifetime challenges. This paper presents a double-frequency ripple cancellation concept and experimental proof of concept. The proposed module-integrated inverter is based on the commonly used two-stage inverter. However, a third port is added for ripple cancellation purposes. Hence, a very small capacitance is needed, and, as a result, a high-reliability film capacitor can be used instead of the bulky low-reliability electrolytic ones.

Original languageEnglish
Article number6517343
Pages (from-to)2692-2698
Number of pages7
JournalIEEE Transactions on Industry Applications
Issue number6
Publication statusPublished - 1 Nov 2013



  • Double-frequency ripple
  • MIL-HDBK-217
  • grid-connected inverter
  • microinverter
  • photovoltaic
  • power decoupling
  • reliability
  • single-phase inverter

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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