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Energies 2017, 10(12), 2077;

Experimental Evaluation of a Switching Matrix Applied in a Bank of Supercapacitors

Renewable Energy Unit, Yucatan Center for Scientific Research, Merida 97205, Yucatan, Mexico
Engineering Department, University of Yucatan, Merida 97000, Yucatan, Mexico
Engineering Department, University of Quintana Roo, Chetumal 77019, Quintana Roo, Mexico
Current address: Carr. Sierra Papacal-Chuburná Puerto, km 5. Sierra Papacal, Merida 97205, Yucatan, Mexico.
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 19 October 2017 / Revised: 23 November 2017 / Accepted: 28 November 2017 / Published: 7 December 2017
(This article belongs to the Section Energy Storage and Application)
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Distributed power generation systems (DPGSs) integrate power sources that tend to be smaller than the typical utility scale, such as for renewable energy sources and other applications. Storage systems that incorporate supercapacitors (SCs) have been proposed to extend the life of batteries and to increase the power capacity of the DPGSs, guaranteeing maximum efficiency. The extraction of energy in SCs is more demanding than in the case of batteries; when SCs have delivered only 75% of their energy, their voltage has already decreased to 50%. Beyond this value, the banks fail to meet the requirements demanded by loads that require a minimum voltage to operate correctly, leaving 25% of the energy unused, thereby limiting the deep charge/discharge cycles that occur. This paper presents a model of a switching matrix applied in a bank of SCs. The model allows the use of a simpler circuit to achieve a large number of serial/parallel-configuration connections (levels), improving the utilization of energy to obtain deep discharge cycles in each SC; therefore, by increasing the average energy extracted from each SC, it extends the power delivery time in the storage bank. The efficiency was verified by experimental results obtained using a bank of six SCs. View Full-Text
Keywords: supercapacitor; reconfigurable bank; energy extraction supercapacitor; reconfigurable bank; energy extraction

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Reveles-Miranda, M.G.; Flota-Bañuelos, M.I.; Chan-Puc, F.; Pacheco-Catalán, D. Experimental Evaluation of a Switching Matrix Applied in a Bank of Supercapacitors. Energies 2017, 10, 2077.

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