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A Method of Suppressing Lightning Potential near neighboring buildings

No.6. A Method of Suppressing Lightning Potential near neighboring buildings. Ｍａｓａａｋｉ　ｋａｎｄｏ （Ｐｒｏｆ．Ｅ．Ｄｒ．） Ｔｏｋａｉ　Ｕｎｉｖｅｒｓｉｔｙ ＥＧＡＴ ２７ｔｈ　Ａｐｒｉｌ，２０１２. １． Background. Lightning in Information society. Incorrect Action, Deterioration In apparatus. Raising Potential Near Buildings. １． Object.

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A Method of Suppressing Lightning Potential near neighboring buildings

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  1. No.6 A Method of Suppressing Lightning Potential near neighboring buildings Ｍａｓａａｋｉ　ｋａｎｄｏ （Ｐｒｏｆ．Ｅ．Ｄｒ．） Ｔｏｋａｉ　Ｕｎｉｖｅｒｓｉｔｙ ＥＧＡＴ ２７ｔｈ　Ａｐｒｉｌ，２０１２

  2. １．Background Lightning in Information society Incorrect Action, Deterioration In apparatus Raising Potential Near Buildings

  3. １．Object Suppress Lightning Currents Suppress raising potential near neighboring buildings

  4. Kinds of over-voltages due lightning • Direct lightning • Induced lightning • Inversed lightning

  5. Direct Lightning

  6. Induced Lightning Electromagnetic Induction Cable ground

  7. Inversed Lightning Cable Ｇｒｏｕｎｄ

  8. １．Principle of Raising Potential Neighboring Buildings LightningRod building１ building２ building３ Image zero ground point Ground Raising Potential

  9. Principle of Raising Potential Neighboring Buildings Ｉｍａｇｅ　ｏｆ　ａ　ｃｉｔｙ Ｉｍａｇｅ　ｏｆ　ｚｅｒｏ　ｇｒｏｕｎｄ point (area)

  10. ３． Method of Suppressing raising Potential Lightning Rod Building Gap Arcing Horn Coil Ground 。

  11. Role of Gap V０ Vo＝Potential of Cloud V2＝Voltage btw gap C１ Lightning C１（大） L.R Build.１ C2 V２（大） V２ gap

  12. Role of Coil Energy of Coil Absorption of the energy

  13. 3. Suppressing raising Potential Method L.R Gap Build.１ Build.２ Build.３ Arcing Horn Suppressing raising potential Image zero ground point Ground

  14. ４．Experimental Method Breakdown Gap１ HV DC POWER DS5054B　５００MHｚ　５GS/s GAP 2 Coil for suppressing currents HV probe Non-inductive resiatance1［Ω］

  15. View of Experiment Ｒｅｃｔｉｆｉｅｒ Ｔｒ． Ｇａｐ１ Ｇａｐ２ Ｃａｐａｃｉｔｏｒ Ｃｏｉｌ Ｄｉｖｉｄｅｒ Ｒｅｓｉｓｔａｎｃｅ ＨＶ　Ｐｒｏｂｅ Ｅａｒｔｈ　Ｒｏｄ

  16. Ｃａｌｃｕｌａｔｉｏｎ　of the current IMAX=5040［A］ IP-P=12000［A］ IMIM=－6960［A］

  17. Samples of testing coils A B C D E F G

  18. Characteristics of coils

  19. Exp.２ Gap1:Gap length 3～10mm Experimental circuits Gap１ HV DC power supply Gap 2 Exp１ Gap2:Gap length 0.1、0.3、0.5、1.0、1.5mm Surge suppression Coil 高圧プローブ

  20. ５．Results（Exp.１） A coilGap１＝5mmconst. Without gap2＝0.1mm 92.6%DW IP-P=5444［A］ IP-P=400［A］ 出力軸１kＶ/div 時間軸4.0μs/div 出力軸１kＶ/div 時間軸40μs/div

  21. Ｒｅｓｕｌｔ　１ Ａ　ＣｏｉｌＧａｐ１＝5mm Ｗｉｔｈｏｕｔ Ｇａｐ2＝1.5mm 87.5%ｄｗ IP-P=5444［A］ IP-P=680［A］ １kＶ/div 4.0μs/div １kＶ/div 40μs/div

  22. 5mm 5mm 5mm 5mm 5mm 10mm 10mm 10mm 10mm 10mm Ｒｅｓｕｌｔｓ１ ※P-P率［%］Peak to Peak電流値の装置なしの場合との割合

  23. Gｃｏｉｌ　Ｇａｐ2＝0.5mm Ｒｅｓｕｌｔ２ Gap１　3mm without Gap１3mmwith 80.4%ＤＷ IP-P=3480［A］ IP-P=680［A］ １kＶ/div 4.0μs/div 0.5kＶ/div 40μs/div Gap１　9mmwithout Gap１9mmwith 81.9%ＤＷ IP-P=9320［A］ IP-P=1680［A］ 2kＶ/div 4.0μs/div １kＶ/div 40μs/div

  24. Ｒｅｓｕｌｔｓ２ ※P-P率［%］Peak to Peak電流値の装置なしの場合との割合

  25. Ｒｅｌａｔｉｏｎｓｈｉｐ　ｂｅｔｗｅｅｎ　ｉｎｄｕｃｔａｎｃｅ　ａｎｄ　ｓｕｐｐｒｅｓｓｉｏｎ　ｒａｔｉｏＲｅｌａｔｉｏｎｓｈｉｐ　ｂｅｔｗｅｅｎ　ｉｎｄｕｃｔａｎｃｅ　ａｎｄ　ｓｕｐｐｒｅｓｓｉｏｎ　ｒａｔｉｏ

  26. Ｃｏｎｃｌｕｓｉｏｎ • Ｍｏｒｅ　ｔｈａｎ　８０　％　Ｓｕｐｐｒｅｓｓｉｏｎｓ　ｗｅｒｅ　ｏｂｔａｉｎｅｄ　ｗｈｅｎ　ｔｈｅ　ｃｏｉｌｓ　　ｗａｓ　ｃｏｎｎｃｅｃｔｅｄ　ｓｕｒｇｅ　ｃｉｒｃｕｉｔｓ　 • ｉｎ　ｓｅｒｉｅｓ．

  27. Thank you for paying attention

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