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Journal of the Korean Institute of Illuminating and Electrical Installation Engineers

ISO Journal TitleJ Korean Inst. IIIum. Electr. Install. Eng.
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Title A Development of Off-line UPS for Air-Conditioning System
Authors Seung-Beom Lim ; Ju-Hyeong Jang ; Ji-Soo Kim ; Sang-Hyun Kim
DOI http://doi.org/10.5207/JIEIE.2021.35.1.001
Page pp.1-8
ISSN 1225-1135
Keywords ESS(Energy Storage System); Passive-Standby; UPS(Uninterruptible Power Supply)
Abstract In this paper, an offline UPS for air conditioning equipment is proposed. The proposed offline UPS normally uses commercial power to supply power to the load while storing energy in the battery, and if there is a problem with the commercial power, it uses the energy stored in the battery to supply stable power to the load. This requires a fast detection method and a seamless transition method. Proposed UPS operates in four modes: normal mode, charging mode, battery mode, and ESS mode. The experiment confirmed the usefulness of the proposed product.