Title

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

Authors

Authors

X. Fang; N. Kutkut; J. Shen;I. Batarseh

Comments

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Abbreviated Journal Title

Renew. Energy

Keywords

Energy storage system; Ultracapacitor; Shift circuits; Energy & Fuels

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. (C) 2010 Elsevier Ltd. All rights reserved.

Journal Title

Renewable Energy

Volume

36

Issue/Number

10

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

2599

Last Page

2604

WOS Identifier

WOS:000292235800005

ISSN

0960-1481

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