著者

浅岡 由伸 本山 英器 松原 広治 杉本 仁志

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.125, no.10, pp.979-987, 2005

被引用文献数

1 3

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Grounding resistance is one of the important parameters in the lightning-protection design of electric power systems. The grounding resistance of electrode decreases as large currents are injected to the electrode by electric discharges in soil. This characteristic is not considered in lightning protection design. Therefore, the design level is kept on the exceeding level in actual phenomena. From viewpoint of the rational lightning protection design for the electric power systems, this characteristic should be considered in practical design. In this study, experiments were conducted using rod electrodes, and the physical phenomena of the electrical discharge in soil were considered by assuming a certain electrical discharge model in soil. Based on these results, a grounding resistance large-current characteristic analysis model that could be easily used in EMTP was developed.

著者

浅岡 由伸 浅川 聡 横山 茂 中田 一夫 杉本 仁志

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.125, no.5, pp.537-543, 2005-05-01

被引用文献数

1 1

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Omitting one phase's current limiting arcing horns on three-phase distribution lines has been applied since 1990's and contributes the costdown for lightning protective countermeasures. Moreover, in order to promote the costdown for the lightning protective countermeasures on single-phase distribution lines, we have investigated the methods omitting one phase's current limiting arcing horns on single-phase distribution lines.<br>When the single-phase distribution line omitting one phase's current limiting arcing horns branches or extends from three-phase distribution line omitting middle phase's current limiting arcing horns, there are possibilities that short circuits are generated between the single-phase distribution line and the three-phase distribution line by a direct lightning stroke.<br>In order to preventing the short circuits outage, we have clarified the conditions that sparkovers generated at some poles and that short circuits continued experimentally and analytically. Based on these conditions, we proposed some effective countermeasures for preventing the short circuits outage on single-phase distribution line omitting one phase's current limiting arcing horns.