接地網之突波壓升與感電安全之探討

A Study on Surge Potential Rise and Electricity Safety of Ground Grids

林豐喬(Feng -Chiao Lin)

指導教授 ： 王瑋民

崑山科技大學/工程學院/電機工程研究所/碩士(2010年)

https://doi.org/10.6828/KSU.2010.00006

摘要

雷擊係自然界現象之ㄧ，為避免直接雷擊造成設備損害或人員傷亡，許多建築物裝設避雷針，利用引線將雷突波導入地網。雷電流引入地網後造成建築物周邊區域地電位升高，間接危及設備及人員安全。影響突波電壓升主要因素有地網特性（形狀、面積大小和土壤電阻）及雷突波特性(波頭時間、峰值及注入點)，這些特性都是地網設計時必須考慮的重點。
本論文利用ATP軟體，模擬地網遭受雷擊時的暫態電壓，分析地網不同位置、地網格距(Span)及雷擊電流注入點，對地網地電位之影響；同時探討因雷擊引起之暫態電壓與人體感電安全關係。

關鍵字

接觸電壓 ； 步間電壓

並列摘要

Lightning strike is a natural phenomenon. To prevent casualties from direct lightning strokes, the lightning rod will be installed on most buildings. The lightning surges are drawn into ground through the lead wires and great transient ground potential rise (GPR) is resulted. The GPR will then endanger the human life and equipments performance. The ground potential rise on ground grids will be influenced by grids characteristics (shape、area and earth resistance) and lighting surge characteristics (rising time、magnitude and drawn location). Also these characteristics need more attention for ground grid design.
In this thesis, the ATP package is used to simulate the transient voltage of ground grids caused by lightning strikes. Simulation cases include different lightning struck location、ground grids with different spans. Finally, the transient electricity safety for human caused by the lightning is studied.

並列關鍵字

touch voltage ； step voltage

參考文獻

[11] 黃金樹、王瑋民，”變電所接地及防雷措施”，崑山科技大

[12] 施冠亦、王瑋民，”變電所接地系統特性之探討”，崑山科

[1] 李芸芬、王瑋民，”南科園區鄰近線路遭雷擊之電壓驟降分

[3] 鄭美俊，“雷擊保護與雷擊感應電壓估算之研究”，碩士論

[9] IEEE Std 80-2000,IEEE Guide for Safety in AC