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A digital signal processor controlled smart battery charger for photovoltaic power systems

journal contribution
posted on 2014-01-01, 00:00 authored by P I Muoka, Enamul HaqueEnamul Haque, Ameen GargoomAmeen Gargoom
An off-grid photovoltaic power system requires an energy storage system, especially batteries, for mitigation of variability and intermittency problems, and for assured service reliability and availability. The longevity and reliability of such batteries depend on the effectiveness of the charging system. This paper presents the modelling, simulation and hardware implementation of a four-stage switch-mode charger based on the single-ended primary inductance converter. The digital signal processor based controller implements algorithms for the system's power balance control, maximum power point tracking to improve charging speed and efficiency, four-stage optimal charging, and system's protection. The protection algorithm provides over-charge, overdischarge, over-temperature and short circuit protection capabilities. The proposed system has the following advantages: ability to continuously charge the batteries even at reduced solar irradiation, higher efficiency, and use of adaptive thermally compensated set points for optimum performance. A prototype is built and experimental results are presented to validate the simulation results.

History

Journal

Australian journal of electrical and electronics engineering

Volume

11

Issue

4

Pagination

400 - 410

Publisher

Taylor & Francis

Location

Abingdon, Eng.

ISSN

1448-837X

eISSN

2205-362X

Language

eng

Publication classification

C Journal article; C1.1 Refereed article in a scholarly journal

Copyright notice

2014, Institution of Engineers Australia

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