Analysis of generalized parallel-series ultracapacitor shift circuits for energy storage systems

Xiang Fang, Nasser Kutkut, John Shen and Issa Batarseh

Renewable Energy, 2011, vol. 36, issue 10, 2599-2604

Abstract: Ultracapacitors have numerous advantages including a remarkably high energy density as compared to conventional capacitors, long life cycle, temperature stability, and require no maintenance, which make them a good candidate to replace batteries as energy storage devices in renewable energy applications. However, ultracapacitors, just like conventional capacitors, inevitably suffer from constant voltage drop during discharging, which may limit their energy utilization, increase the voltage ripple of the DC bus across which the capacitors are connected and consequently increase the VA stresses of the subsequent converter stage. To alleviate the above limitations, parallel-series ultracapacitor shift circuits are employed to improve the energy utilization and minimize the DC bus voltage ripple. Two generalized parallel-series ultracapacitor shift circuits are presented and analyzed, and some design considerations and optimization methods are discussed.

Keywords: Energy storage system; Ultracapacitor; Shift circuits (search for similar items in EconPapers)
Date: 2011
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:36:y:2011:i:10:p:2599-2604

DOI: 10.1016/j.renene.2010.05.003

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