高土壤電阻率下防雷裝置的設計
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福建省三明市課題“三明新一代天氣雷達站雷電防護研究”資助


Design of Lightning Protection Devices under High Soil Resistivity
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    摘要:

    為了明確在高土壤電阻率條件下雷達站防雷裝置設計的不同之處,對福建省三明市新一代天氣雷達站所處位置進行分析,結合其土壤電阻率極高的特點,探討了其防雷裝置的設計。該接地采用共用接地系統,且接地電阻設計值不大于4 Ω。為達到該設計要求,該項目采取了接地散流網、鋼管接地極、深井接地裝置、外引環型接地裝置等方法進行防雷裝置的設計施工。探討了深井法、籠式泄流坑等接地方式在高土壤電阻率地區的應用。復雜土壤環境下接地電阻的測試可采用零電位區漂移法。實踐表明,三明市新一代天氣雷達站已達到了防雷接地保護的要求,現已運行1年多,未曾受到雷電損害。該防雷裝置設計可在高土壤電阻率下防雷裝置的設計與施工中借鑒應用。

    Abstract:

    In order to identify the difference of the lightning protection device design of radar station under high soil resistivity condition, the lightning protection devices for new generation weather radar stations in Sanming of Fujian Province are discussed, based on the location analysis in combination with the characteristic of high soil resistivity. The common grounding system is used, and the design value of grounding resistance is less than 4 Ω. In order to fill the design requirements, the project took such methods as the loose ground net, steel grounding, deep well grounding device, external ring grounding device, etc. for grounding device construction. The deep well method and cage type discharge pit grounding can be applied in the high soil resistivity area. The zero potential drift method can be used in the grounding resistance test of complex soil environments. The practice shows that the lightning protection devices of this station have been running more than a year without damaged by thunders and lightning, and have reached the requirements of lightning protection and grounding protection. This study can be used as a reference in other designs and construction of high soil resistivity grounding devices.

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李萍,蔡河章,馬秀玉,張泉鋒,龔偉.高土壤電阻率下防雷裝置的設計[J].氣象科技,2014,42(5):912~917

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  • 收稿日期:2013-10-15
  • 定稿日期:2014-03-10
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  • 在線發布日期: 2014-10-30
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