• Title/Summary/Keyword: Lee In-bok

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Characteristics of Lightning Overvoltages Coming in Low-Voltage Power Distribution Systems

  • Lee, Bok-Hee;Lee, Dong-Moon;Lee, Su-Bong;Jeong, Dong-Cheol;Lee, Jae-Bok;Myung, Sung-Ho
    • KIEE International Transactions on Electrophysics and Applications
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    • v.3C no.3
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    • pp.91-98
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    • 2003

  • The importance of improving the quality of electric power is being strongly raised, owing to an increasing use of sensitive and small-sized electronic devices and systems. The transient over-voltages on low-voltage power distribution systems are induced by direct or indirect lightning return strokes. These can cause damage and/or malfunction of the utility systems for home automation, office automation, factory automation, medical automation, etc. The behaviors of lightning overvoltages transferred through the transformer to the low-voltage distribution systems using a Marx generator were experimentally investigated. Furthermore, the coupling mechanisms of lightning overvoltages transferred to the low-voltage systems were clearly illustrated through a theoretical simulation using a Pspice program. The overvoltages in low-voltage ac power systems are rarely limited by the application of the surge arrester to the primary side of the distribution transformer. A superior surge protection scheme is to install surge protection devices at the service entrance switchboard and/or at the load devices in TN power systems.

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