Title :
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
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;
Conference_Titel :
Telecommunication Energy Conference, 1999. INTELEC '99. The 21st International
Conference_Location :
Copenhagen
Print_ISBN :
0-7803-5624-1
DOI :
10.1109/INTLEC.1999.794066
