Dynamic Analysis of a Supercapacitor DC-Link in Photovoltaic Conversion Applications

Fabio Corti, Antonino Laudani (), Gabriele Maria Lozito, Martina Palermo, Michele Quercio, Francesco Pattini and Stefano Rampino
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Fabio Corti: Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Firenze, 50139 Florence, Italy
Antonino Laudani: Dipartimento di Ingegneria Industriale, Elettronica e Meccanica, Università degli Studi Roma Tre, 00146 Rome, Italy
Gabriele Maria Lozito: Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Firenze, 50139 Florence, Italy
Martina Palermo: Dipartimento di Ingegneria Industriale, Elettronica e Meccanica, Università degli Studi Roma Tre, 00146 Rome, Italy
Michele Quercio: Dipartimento di Ingegneria Industriale, Elettronica e Meccanica, Università degli Studi Roma Tre, 00146 Rome, Italy
Francesco Pattini: Institute of Materials for Electronic and Magnetism-National Research Council (IMEM-CNR), delle Scienze 37/A, 43124 Parma, Italy
Stefano Rampino: Institute of Materials for Electronic and Magnetism-National Research Council (IMEM-CNR), delle Scienze 37/A, 43124 Parma, Italy

Energies, 2023, vol. 16, issue 16, 1-19

Abstract: In this work, a dynamic analysis describing the charge and discharge process of a supercapacitor for the DC-link between a photovoltaic source and a constant power load is presented. The analysis results in a complete nonlinear and dynamic model that can be used for simulation and control for DC–DC converters, achieving fast recharge times and accurate steady-state voltages in the DC link to avoid overcharging the supercapacitor during low power absorption scenarios. The proposed approach includes parasitic elements for the supercapacitor and efficiency effects on the conversion stage, proposing equations useful for design and control. Stability is also discussed for the charge process of the supercapacitor. Validation of the analytical model is performed by comparison with LTSpice simulation, confirming a good agreement between theory and simulation.

Keywords: photovoltaics; Supercapacitors; DC–DC; dynamic systems; circuit simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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