http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
임승범(Seung-Beom Lim),장주형(Ju-Hyeong Jang),김지수(Ji-Soo Kim),김상현(Sang-Hyun Kim) 한국조명·전기설비학회 2021 조명·전기설비학회논문지 Vol.35 No.1
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.
임승범(Seung-Beom Lim),장주형(Ju-Hyeong Jang),김형중(Hyoung-Joong Kim) 한국조명·전기설비학회 2021 조명·전기설비학회논문지 Vol.35 No.8
In this paper, a high efficiency hybrid UPS based 3-level topology with ESS mode is proposed. The proposed hybrid UPS is a double conversion method that supplies stable power to the load while charging the battery, and automatically supplies power to the using the energy stored in the battery when the input power is unstable or power failure occurs. In addition, it has the advantage of being able to manage power by supplying power to the load using commercial power and battery power at the same time when the ESS mode is required for power shortage, peak load, or user convenience. Proposed UPS operates in four modes: normal mode, battery mode, ESS mode 1 and ESS mode 2. Also, if power factor improvement is required, the power factor of the opening can be improved by adjusting the phase of the input current. Finally, the usefulness of the proposed system is verified through experiments.