電線共同溝内におけるアーク短絡故障時の圧力上昇・伝搬

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  • 宮城 吏
    （一財）電力中央研究所　電力技術研究所
  • 田中 慎一
    （一財）電力中央研究所　電力技術研究所
  • 岩田 幹正
    （一財）電力中央研究所　電力技術研究所
  • 天川 正士
    （一財）電力中央研究所　電力技術研究所

書誌事項

タイトル別名
  • Pressure-rise and Propagation due to Short-circuit Fault Arc in Underground Common Duct
  • デンセン キョウドウ コウナイ ニ オケル アーク タンラク コショウジ ノ アツリョク ジョウショウ ・ デンパン

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説明

In recent years, in order to ensure the delightful walking space and improve the urban landscape, the type of shallowly buried underground system for the common duct system of power cables and other cables has been introduced in the Japanese power distribution system. When a short-circuit fault arc occurs on high-voltage power cables in an underground common duct, the pressure in the latter increases due to the high temperature of the arc and it is concerned that such a pressure rise will influence another electrical power equipment. Therefore, comprehending the pressure rise and propagation due to fault arcs by the short-circuit test is important. However, the pressure rise and propagation are affected by many factors. Therefore, simulation technology is effectively applied to examine such a pressure rise and propagation in addition to short-circuit tests. In this paper, a 3-D CFD calculation model was constructed regarding the pressure rise and propagation in the underground common duct and the numerical analysis was carried out. As a result, it was revealed that the simulation results corresponded with 20% accuracy to the maximum pressure rise obtained by short-circuit tests.

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