A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint

Rahul Mallik, Branko Majmunovic, Soham Dutta, Gab-Su Seo, Dragan Maksimovic, Brian Johnson

Research output: Contribution to conferencePaper


The objective of this paper is to realize a universal dc-side controller for photovoltaic (PV) systems where the control is agnostic to the downstream converter configuration. To achieve this, the downstream power converter and its controls are manipulated into an effective power control loop that is then cast into a generalized multi-loop design framework. On the dc side, a nonlinear small-signal model of the PV input is realized exclusively in terms of PV datasheet parameters (i.e., open-circuit voltage, short-circuit current, and maximum power point). Finally, a linear controller is used to modulate the dc-side PV system with the generic downstream power controller. A Lyapunov candidate is proposed to analyze the stability of the interconnected system and provide a streamlined approach for the controller design. The proposed design is validated on a 1-kVA experimental setup that interfaces a PV module to the grid.
Original languageAmerican English
Number of pages10
StatePublished - 2022
EventIEEE Energy Conversion Congress and Exposition - Detroit, Michigan
Duration: 9 Oct 202213 Oct 2022


ConferenceIEEE Energy Conversion Congress and Exposition
CityDetroit, Michigan

Bibliographical note

See NREL/CP-5D00-85112 for paper as published in proceedings

NREL Publication Number

  • NREL/CP-5D00-83961


  • dc-dc control
  • Lyapunov analysis
  • photovoltaic systems
  • time scale separation


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