Maximum power transfer tracking for a photovoltaic-supercapacitor energy system

Younghyun Kim, Naehyuck Chang, Yanzhi Wang, Massoud Pedram

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

69 Scopus citations

Abstract

It is important to maintain high efficiency when charging electrical energy storage elements so as to achieve holistic optimization from an energy generation source (e.g., a solar cell array) to an energy storage element (e.g., a supercapacitor bank). Previous maximum power point tracking (MPPT) methods do not consider the fact that efficiency of the charger varies depending on the power output level of the energy generation source and the state of charge of the storage element. This paper is the first paper to optimize the efficiency of a supercapacitor charging process by utilizing the MPPT technique and simultaneously considering the variable charger efficiency. More precisely, previous MPPT methods only maximize the power output of the energy generation source, but they do not guarantee the maximum energy is stored in the energy storage element. Note that the load device takes its energy from the storage element so it is important to maximize energy transfer from the source into the storage element. We present a rigorous framework to determine the optimal capacitance of a supercapacitor and optimal configuration of a solar cell array so as to maximize the efficiency of energy transfer from the solar cells into a bank of supercapacitors. Experimental results show the efficacy of the proposed technique and design optimization framework.

Original languageEnglish (US)
Title of host publicationProceedings of the International Symposium on Low Power Electronics and Design
Pages307-312
Number of pages6
DOIs
StatePublished - 2010
Externally publishedYes
Event16th ACM/IEEE International Symposium on Low-Power Electronics and Design, ISLPED'10 - Austin, TX, United States
Duration: Aug 18 2010Aug 20 2010

Other

Other16th ACM/IEEE International Symposium on Low-Power Electronics and Design, ISLPED'10
CountryUnited States
CityAustin, TX
Period8/18/108/20/10

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Keywords

  • Maximum power transfer tracking
  • Photovoltaic
  • Supercapacitor

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kim, Y., Chang, N., Wang, Y., & Pedram, M. (2010). Maximum power transfer tracking for a photovoltaic-supercapacitor energy system. In Proceedings of the International Symposium on Low Power Electronics and Design (pp. 307-312) https://doi.org/10.1145/1840845.1840909