Study of Lightning Surge Voltage Distribution on RC Structure Building Grounding

• Main Authors: Hao-xiang Xu, 許皓翔
• Other Authors: Horng-ching Hsiao
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/36m863

碩士 === 國立臺灣科技大學 === 電機工程系 === 99 === The lightning strikes are natural phenomenon has been a major concern in every Countries. How to lower the surge voltage and complete lightning protection is the first consideration during building design and implementation. The lightning-protection rod of the building is grounded directly through the grounding conductor. It is seldom to ground the lightning rod via the steel structure of the building. The thesis discussed the difference between direct-grounded method and building-steel-structure-grounded method. The construction is simulated with an eight floors Reinforce Concrete (RC) structure using EMTP software. Every section of the column and beam of steel structure is simulated with resistance and inductance. The lightning model of the Heilder-type is used to simulate the lightning current. Lightning surge voltage distribution on RC structure building grounding is studied in this thesis. The results show that surge voltage of direct-grounded method is lower than that of RC-structure- grounded method in terms of building lightning-protection rod. According to the advantages for direct-grounded method, the rising rate of surge voltages are lowered which are much more safe to mechanic equipment and working environment to employee. Furthermore, the surge voltage of neutral grounded is lower than that of neutral non-grounded in a 3-phase power supply of building; meanwhile, the different connection of 3-phase-load, Y or Δ, will affect the surge voltage distribution when lightning strikes.