The simulation and analysis of the step potential and touch potential between two grounding grids
碩士 === 國立成功大學 === 電機工程學系專班 === 100 === Design of grounding grids is limited in construction due to deficiency of land space in Taiwan. An abnormal equipment may produce the current leakage, meanwhile the differential voltage will be happened on adjacent grounding grids. If the distance between groun...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/90442016390211704103 |
| Summary: | 碩士 === 國立成功大學 === 電機工程學系專班 === 100 === Design of grounding grids is limited in construction due to deficiency of land space in Taiwan. An abnormal equipment may produce the current leakage, meanwhile the differential voltage will be happened on adjacent grounding grids. If the distance between grounding grids is not enough, the differential voltage may cause the back flashover that makes other equipment connected to the adjacent grounding grid damaged or people nearby gets shock.
This study investigates the step voltage and contact voltage of two grounding grids that are located on different underground layer. It simulates the step voltage and contact voltage of grounding grids of low voltage power system and weak power system that are located on different underground layer via power system analysis software called ETAP (Electrical Transient Analysis Program) and CYME CYMGRD. The result of simulation shows the step voltage is under the limit of regulation; the contact voltage is influenced by insulation of leads. This result can be a reference for the design of grounding grids.
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