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Elimination of the Inrush Current Phenomenon Associated with Single-Phase Offline UPS Systems

Authors
Bukhari, Syed Sabir HussainAtiq, ShahidKwon, Byung-il
Issue Date
Feb-2016
Publisher
MDPI AG
Keywords
uninterruptible power supply; offline; inrush currents; current regulation
Citation
ENERGIES, v.9, no.2, pp.1 - 16
Indexed
SCIE
SCOPUS
Journal Title
ENERGIES
Volume
9
Number
2
Start Page
1
End Page
16
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/14559
DOI
10.3390/en9020096
ISSN
1996-1073
Abstract
Critical load applications always rely on UPS systems to uphold continuous power during abnormal grid conditions. In case of any power disruption, an offline UPS system starts powering the load to avoid blackout. However, this process can root the momentous inrush current for the transformer installed before the load. The consequences of inrush current can be the reduction of output voltage and tripping of protective devices of the UPS system. Furthermore, it can also damage the sensitive load and decrease the transformer's lifetime. To prevent the inrush current, and to avoid its disruptive effects, this research suggests an offline UPS system based on a current regulated inverter that eliminates the inrush current while powering the transformer coupled loads. A detailed comparative analysis of the conventional and proposed topologies is presented and the experiment was performed by using a small prototype to validate the performance, and operation of the proposed topology.
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COLLEGE OF ENGINEERING SCIENCES > SCHOOL OF ELECTRICAL ENGINEERING > 1. Journal Articles

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