Controller performance assessment of a photovoltaic generator terminated in a current-mode-buck-convertor-load

Moshe Sitbon, Martin Mellincovsky, Ilan Aharon

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, a comprehensive control analysis is presented, with emphasis on regulating the terminal voltage of a photovoltaic generator, interfaced with a current mode controlled buck DC-DC converter, which is, in turn terminated by a battery. The combined generator-convertor-load system possesses nonlinear behaviour, and is subject to environmental conditions, thus causing the control task complicated. Additionally, analyses of small signal equations reveal a possible unstable condition. Hence, a new method of designing a controller for worst-case scenario is presented. Additionally, results of implementing a typical linear controller (PI), which can be designed only in reference to a single nominal operation point, revealing a varied responses. Simulation and results of mathematical analysis are presented to verify the proposed method.

Original languageEnglish
Pages (from-to)56-62
Number of pages7
JournalElektronika ir Elektrotechnika
Volume25
Issue number3
DOIs
StatePublished - 1 Jan 2019

Keywords

  • Control design
  • DC-DC power converters
  • Mathematical analysis
  • Photovoltaic systems

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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