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민병욱(Byeong-Wook Min),신명식(Myoung-Sik Shin),황윤곤(Yoon-Gone Hwang),김경수(Kyeong-Soo Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Substation emergency power system is to supply uninterruptible power to the substation facilities such as remote control unit, communication unit, light system, and etc. Lead acid batteries are commonly used for this uninterruptible power system. However, lead acid batteries contain Pb, H₂SO₄, H₂S and etc. which are environmentally hazardous chemicals. These batteries should be installed in an isolated room which is sufficiently big for 60 sets of batteries connected in series. The failure of only one set of the batteries directly causes the loss of their function. This paper introduces new substation emergency power system which uses Li-ion battery to avoid the disadvantages of lead acid battery.