Lightning Surge Characteristics of Large Grounding System with Multi-grid
| Autor: | Ming-Hong Lai, 賴明宏 |
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| Rok vydání: | 2001 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 89 In this thesis, the lightning characteristics of large grounding system with multi-grid are analyzed based on the electromagnetic theory. The study is aimed to the grounding system in the Mucha factory of Taipei-Rapid-Transit System (TRTS) which is composed of seven ground grids. To study the lightning characteristics of this grounding system, the ground potential rises (GPRs), ground surface potentials, ground potential differences (GPDs) between different grids, step voltages and touch voltages on each grid when the lightning is striking on one of the grids is analyzed and the hazards to personnel and equipments are evaluated. The study will consider that all the grids are connected together and disconnected from each other, respectively. The study results have shown that the GPR, GPD and touch voltages on the grid to be stricken by lightning will be reduced with small degree when all the grids are connected together. These results will contribute to the protections of equipments and the safety of personnel on the grid to be stricken by lightning, but the GPR of step voltage and touch voltages on other grids without lightning striking will be slightly risen. In summary, whether all the grids are connected together or not, the protection measures are still required to enhance the personnel and equipments to protect against lightning. Many protection measures had been proposed by the literatures. This thesis will integrate then and list out for application references. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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