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

Syed Sabir Hussain Bukhari, Shahid Atiq and Byung-il Kwon
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Syed Sabir Hussain Bukhari: Deptartment of Electronic Systems Engineering, Hanyang University ERICA, Ansan 426-791, Korea
Shahid Atiq: Deptartment of Electronic Systems Engineering, Hanyang University ERICA, Ansan 426-791, Korea
Byung-il Kwon: Deptartment of Electronic Systems Engineering, Hanyang University ERICA, Ansan 426-791, Korea

Energies, 2016, vol. 9, issue 2, 1-16

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.

Keywords: uninterruptible power supply; offline; inrush currents; current regulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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