Controller Performance Assessment of a Photovoltaic Generator Terminated in a Current-Mode-Buck-Convertor-Load

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 possesse...

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Bibliographic Details
Published inElektronika ir elektrotechnika Vol. 25; no. 3; pp. 56 - 62
Main Authors Sitbon, Moshe, Mellincovsky, Martin, Aharon, Ilan
Format Journal Article
LanguageEnglish
Published Kaunas University of Technology 25.06.2019
Kaunas University of Technology, Faculty of Telecommunications and Electronics
Subjects
Analysis
Batteries
control design
dc-dc power converters
Electric converters
Environmental quality
mathematical analysis
Numerical analysis
photovoltaic systems
Power converters
Solar energy industry
Photovoltaic systems
Control design
Mathematical analysis
DC-DC power converters
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Summary: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.
ISSN:1392-1215
2029-5731
DOI:10.5755/j01.eie.25.3.23677