Highly reliable uninterruptible power supply using a bi-directional converter

Author

Doishita, K. ; Hashiwaki, Masahiro ; Aoki, Tadahito ; Kawagoe, Yuji ; Murakami, Naoki

Author_Institution

NTT Power & Building Facilities Inc., Tokyo, Japan

fYear

1999

fDate

36312

Abstract

A bi-directional converter and two switches have been added to the conventional circuitry in an uninterruptible power supply (UPS) to improve its reliability. If either the rectifier or inverter fails, the bi-directional converter automatically takes over their operation, so that power continues to be supplied to the load. Because a complicated control system is not needed, the increase in the size and cost of this highly reliable UPS is minimized. The reliability of the inverter supply is an order of magnitude higher than that of a conventional UPS. Moreover, the UPS is about 30% cheaper than a redundant-parallel-running UPS and requires about 30% less installation area

Keywords

invertors; power convertors; reliability; uninterruptible power supplies; UPS; bi-directional converter; high reliability; inverter supply; reliability improvement; switches; uninterruptible power supply; Automatic control; Bidirectional control; Inverters; Power system reliability; Rectifiers; Size control; Switches; Switching circuits; Switching converters; Uninterruptible power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunication Energy Conference, 1999. INTELEC '99. The 21st International

Conference_Location

Copenhagen

Print_ISBN

0-7803-5624-1

Type

conf

DOI

10.1109/INTLEC.1999.794066

Filename

794066