Feedback linearization control of non-inverting buck-boost PV power optimizers

Leonardo Callegaro, Daniel J. Pagano, Mihai Ciobotaru, John E. Fletcher

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

3 Citations (Scopus)

Abstract

In this paper, a novel control design based on a feedback linearization control (FLC) technique is developed for a Photovoltaic (PV) power optimizer implemented on a non-inverting buck-boost power converter. Unlike the classical local linearization techniques commonly used in the technical literature, this approach allows to obtain large-signal linear equations, by means of the feedback linearization of the non-linear terms. The non-linear model of the buck-boost converter operating in both buck and boost modes is presented, followed by the exact linearization and decoupling model using the FLC technique. From this linearized model, simple proportional and proportional-integral controllers are designed for the inner current and outer voltage control loops, respectively, in a cascaded control strategy. Simulation results demonstrate the effectiveness of this control technique, capable of regulating the PV voltage with consistent transient response, independent of the operating point of the PV source.
Original languageEnglish
Title of host publication2017 IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
Subtitle of host publicationproceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781509053391
ISBN (Print)9781509053407
DOIs
Publication statusPublished - 2017
Externally publishedYes
EventInternational Symposium on Power Electronics for Distributed Generation Systems (8th : 2017) - Florianópolis, Brazil
Duration: 17 Apr 201720 Apr 2017

Publication series

Name
ISSN (Electronic)2329-5767

Conference

ConferenceInternational Symposium on Power Electronics for Distributed Generation Systems (8th : 2017)
Abbreviated titlePEDG 2017
CountryBrazil
CityFlorianópolis
Period17/04/1720/04/17

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  • Cite this

    Callegaro, L., Pagano, D. J., Ciobotaru, M., & Fletcher, J. E. (2017). Feedback linearization control of non-inverting buck-boost PV power optimizers. In 2017 IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG): proceedings Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/PEDG.2017.7972451