Title

Analysis Of Generalized Parallel-Series Ultracapacitor Shift Circuits For Energy Storage Systems

Keywords

Energy storage system; Shift circuits; Ultracapacitor

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. © 2010 Elsevier Ltd.

Publication Date

10-1-2011

Publication Title

Renewable Energy

Volume

36

Issue

10

Number of Pages

2599-2604

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.renene.2010.05.003

Socpus ID

79957489956 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79957489956

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