UPS with Electric-Energy Storage Function Using VRLA Batteries

Ichiro KIYOKAWA  Tomonobu TSUJIKAWA  Toshio MATSUSHIMA  Seiichi MUROYAMA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E87-B   No.12   pp.3500-3505
Publication Date: 2004/12/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on the 25th International Telecommunications Energy Conference (INTELEC'03))
Category: Rectifiers, Inverters and UPS
Keyword: 
peak shaving,  energy-storage,  long-cycle-life VRLA batteries,  UPS,  

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Summary: 
A UPS with an energy storage function using long-cycle-life VRLA batteries has been developed. Combining the functions of UPS and energy storage is effective to enhance the cost-effectiveness of the UPS. New long-cycle-life VRLA batteries, with capacities of 1000 or 1500 Ah at 2 V, have been developed for the UPS. A cycle life of 3000 or more cycles was estimated from our cycle test. The UPS has been installed in a telecommunications building for field-testing. This paper describes the system configuration, electrical characteristics of the UPS and its components, and result of our field test.