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AC-UPS reliability and availability performance: Comparison of available solutions

Research output: Contribution to journalConference articleScientificpeer-review


Original languageEnglish
JournalINTELEC, International Telecommunications Energy Conference (Proceedings)
Publication statusPublished - 1 Dec 1989
Externally publishedYes
Publication typeNot Eligible
EventProceedings of the Eleventh International Telecommunications Energy Conference - INTELEC '89. Part 2 (of 2) - Florence, Italy
Duration: 15 Oct 198918 Oct 1989


Uninterruptible power supply (AC-UPS) systems are studied from the reliability and availability (R&A) performance point of view. The objective is to find out the basic reason for using a UPS system as well as its impact on the optimal solution; and how the basic mission can be carried out in an optimal way. The alternatives are series power processing (also called true UPS) and parallel power processing (also called stand-by UPSW or line-interactive UPS). It is shown that the available UPS solutions are nearly equal from the R&A point of view and that if high reliability is of prime concern, optimal results can be obtained by means of line-interactive UPS.