Accurate supercapacitor modeling for energy-harvesting wireless sensor nodes
Accurate supercapacitor modeling for energy-harvesting wireless sensor nodes
Supercapacitors are often used in energy-harvesting wireless sensor nodes (EH-WSNs) to store harvested energy. Until now, research into the use of supercapacitors in EH-WSNs has considered them to be ideal or over-simplified, with non-ideal behavior attributed to substantial leakage currents. In this brief, we show that observations previously attributed to leakage are predominantly due to redistribution of charge inside the supercapacitor. We confirm this hypothesis through the development of a circuit-based model which accurately represents non-ideal behavior. The model correlates well with practical validations representing the operation of an EH-WSN, and allows behavior to be simulated over long periods.
energy harvesting, supercapacitor modeling, system simulation, wireless sensor networks, supercapacitor leakage
911-915
Weddell, Alex
3d8c4d63-19b1-4072-a779-84d487fd6f03
Merrett, Geoff V.
89b3a696-41de-44c3-89aa-b0aa29f54020
Kazmierski, Tom
a97d7958-40c3-413f-924d-84545216092a
Al-Hashimi, Bashir
0b29c671-a6d2-459c-af68-c4614dce3b5d
December 2011
Weddell, Alex
3d8c4d63-19b1-4072-a779-84d487fd6f03
Merrett, Geoff V.
89b3a696-41de-44c3-89aa-b0aa29f54020
Kazmierski, Tom
a97d7958-40c3-413f-924d-84545216092a
Al-Hashimi, Bashir
0b29c671-a6d2-459c-af68-c4614dce3b5d
Weddell, Alex, Merrett, Geoff V., Kazmierski, Tom and Al-Hashimi, Bashir
(2011)
Accurate supercapacitor modeling for energy-harvesting wireless sensor nodes.
IEEE Transactions on Circuits and Systems II: Express Briefs, 58 (12), .
(doi:10.1109/TCSII.2011.2172712).
Abstract
Supercapacitors are often used in energy-harvesting wireless sensor nodes (EH-WSNs) to store harvested energy. Until now, research into the use of supercapacitors in EH-WSNs has considered them to be ideal or over-simplified, with non-ideal behavior attributed to substantial leakage currents. In this brief, we show that observations previously attributed to leakage are predominantly due to redistribution of charge inside the supercapacitor. We confirm this hypothesis through the development of a circuit-based model which accurately represents non-ideal behavior. The model correlates well with practical validations representing the operation of an EH-WSN, and allows behavior to be simulated over long periods.
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More information
Accepted/In Press date: 22 September 2011
Published date: December 2011
Keywords:
energy harvesting, supercapacitor modeling, system simulation, wireless sensor networks, supercapacitor leakage
Organisations:
Electronic & Software Systems, EEE
Identifiers
Local EPrints ID: 272829
URI: http://eprints.soton.ac.uk/id/eprint/272829
ISSN: 1549-7747
PURE UUID: 8e59bdea-2661-4113-88ab-10467e769cbf
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Date deposited: 22 Sep 2011 12:37
Last modified: 15 Mar 2024 03:25
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Contributors
Author:
Alex Weddell
Author:
Geoff V. Merrett
Author:
Tom Kazmierski
Author:
Bashir Al-Hashimi
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