Tri-state cuk inverter with power decoupling for photovoltaic applications

Ahmed Darwish*, Saud Alotaibi, Mohamed A. Elgenedy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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This paper proposes modified modulation and control schemes for power decoupling of single-stage single-phase Cuk inverter in continuous conduction mode. Because it has inherent two inductors at the input and output side, the Cuk inverter is able to step up/down the voltage with reduced input and output current ripples. Thus, smaller filtering capacitance, especially at the input side, can be used which increases its suitability for photovoltaic applications. For the maximum power point tracking control, the oscillating even order harmonic components should be eliminated from the inverter's input side otherwise the maximum power cannot be extracted. The inverter's input and output currents will be controlled independently using the proposed modulation scheme and hence even harmonics can be decoupled from the input side's current without adding additional circuitry. In addition, the paper presents a control scheme to generate sinusoidal output grid current while the input current is kept constant with time. The presented systems is verified using MATLAB simulations as well as an experimental prototype controlled by F28335 ezdsp.
Original languageEnglish
Title of host publication9th Renewable Power Generation Conference (RPG Dublin Online 2021)
Publisher Institution of Engineering and Technology (IET)
Number of pages6
ISBN (Electronic)9781839535048
Publication statusPublished - 22 Oct 2021


  • modular DC/AC inverter
  • Cuk converter
  • photovoltaic applications

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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