A Bi-Directional DC/DC Converter for an Energy Storage System

Author

Inoue, Shigenori ; Akagi, Hirofumi

Author_Institution

Student Member, IEEE, Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, S3-17, 2-12-1, O-okayama, Meguro, Tokyo, 152-8552, JAPAN. E-mail: inoue@akg.ee.titech.ac.jp

fYear

2007

fDate

Feb. 25 2007-March 1 2007

Firstpage

761

Lastpage

767

Abstract

This paper addresses a bi-directional dc/dc converter suitable for an energy storage system with an additional function of galvanic isolation. An energy storage device such as an electric double layer capacitor is directly connected to one of the dc buses of the dc/dc converter without any chopper circuit. Nevertheless, the dc/dc converter can continue operating when the voltage across the energy storage device droops along with its discharge. Theoretical calculation and experimental measurement reveal that power loss and peak current impose limitations on a permissible dc-voltage range. This information may be useful in design of the dc/dc converter. A laboratory model of the energy storage system rated at 200 V and 2.6 kJ designed and constructed in this paper verifies that the dc/dc converter can charge and discharge the capacitor bank properly. Moreover, the dc/dc converter can charge the capacitor bank from zero to the rated voltage without any external precharging circuit.

Keywords

Bidirectional control; Capacitors; Choppers; Circuits; Current measurement; DC-DC power converters; Energy storage; Galvanizing; Supercapacitors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference, APEC 2007 - Twenty Second Annual IEEE

Conference_Location

Anaheim, CA, USA

ISSN

1048-2334

Print_ISBN

1-4244-0713-3

Type

conf

DOI

10.1109/APEX.2007.357601

Filename

4195805