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Ultra low-power photovoltaic MPPT technique for indoor and outdoor wireless sensor nodes

Weddell, Alex, Merrett, Geoff and Al-Hashimi, Bashir (2011) Ultra low-power photovoltaic MPPT technique for indoor and outdoor wireless sensor nodes At Design, Automation and Test in Europe (DATE), France. 14 - 18 Mar 2011. 4 pp.

Record type: Conference or Workshop Item (Other)

Abstract

Photovoltaic (PV) energy harvesting is commonly used to power wireless sensor nodes. To optimise harvesting efficiency, maximum power point tracking (MPPT) techniques are often used. Recently-reported techniques focus solely on outdoor applications, being too power-hungry for use under indoor lighting. Additionally, some techniques have required light sensors (or pilot cells) to control their operating point. This paper describes an ultra low-power MPPT technique which is based on a novel system design and sample-and-hold arrangement, which enables MPPT across the range of light intensities found indoors and outdoors and is capable of cold-starting. The proposed sample-and-hold based technique has been validated through a prototype system. Its performance compares favourably against state-of-the-art systems, and does not require an additional pilot cell or photodiode. This represents an important contribution, in particular for sensors which may be exposed to different types of lighting (such as body-worn or mobile sensors).

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More information

Published date: 14 March 2011
Venue - Dates: Design, Automation and Test in Europe (DATE), France, 2011-03-14 - 2011-03-18
Organisations: Electronic & Software Systems, EEE

Identifiers

Local EPrints ID: 271805
URI: http://eprints.soton.ac.uk/id/eprint/271805
PURE UUID: 5d99d78a-3b57-4dbd-9e34-fe5d4f159e02
ORCID for Alex Weddell: ORCID iD orcid.org/0000-0002-6763-5460
ORCID for Geoff Merrett: ORCID iD orcid.org/0000-0003-4980-3894

Catalogue record

Date deposited: 17 Dec 2010 10:06
Last modified: 18 Jul 2017 06:38

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Contributors

Author: Alex Weddell ORCID iD
Author: Geoff Merrett ORCID iD

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