摘要
貓空纜車於剛開始營運時，因遭受雷擊導致安全線模組損壞，迫使貓空纜車系統停止運轉約5小時，嚴重影響貓空纜車系統營運，故台北捷運公司為此針對車站接地部份進行改善，以防止雷擊再次損壞控制盤內的安全線模組。為此，本研究針對第一次雷擊事故，即落雷擊中最接近行控中心之第13號塔柱進行模擬，模擬改善接地前後雷擊電流沿著安全線流入行控中心的安全線顯示模組之電流分佈。 本研究以ATP-EMTP軟體建立貓纜系統模型架構。ATP-EMTP適用於一般輸電線鐵塔以及低壓控制系統之模擬，但因其地網模型較為簡略，且貓纜塔柱結構較為特殊，故本研究另外再選用CDEGS軟體模擬車站地網及貓纜塔柱，將結果經等效計算得到等效電路參數後，再輸入至ATP-EMTP，建構出塔柱及車站地網模型。此外，模型中尚包含安全線以及行控中心內避雷器之等效電路。 模擬結果顯示：當落雷擊中第13號塔柱時，而改善車站接地前，位於安全線顯示模組前的避雷器因無法承受過大的雷擊電流而失去保護作用；在改善車站接地後，雷擊電流可經由改善後的接地引線連接車站地網而洩放至大地，使避雷器不需承受過大的雷擊電流，進而保護安全線顯示模組。
並列摘要
MaoKong Gondola has opened since July 4, 2007. Accidentally, the safe-line module in the control center was destroyed when after No.13 tower stricken by lightning in that month. Because of this event, MaoKong Gondola stopped operation for about 5 hours. In order to prevent the safe-line module from lightning surge, Taipei Rapid Transit Corporation (TRTC) built a ground mesh under the station to reinforce the ground connection. This study simulates the distribution of lightning current which flows into the safe-line module in the control center alone the safe-line when No.13 tower which is nearby the control center is stricken by lightning, in both cases of before and after ground mesh built. The ATP-EMTP software is selected to establish the simulation model. Because the grounding model in ATP-EMTP is too simple and the parameters of tower in ATP-EMTP are not available due to the particular structure of the tower of Mucha Condola, the other software, CDEGS, is used to model the tower and the new ground mesh under the station. After the processing of CDEGS, the parameters of equivalent circuits of the tower and the ground mesh are applied to ATP-EMTP for simulation. In addition, the equivalent circuits of the safe-line and the arrester are included. The results show that the arrester in front of safe-line module loses its function until the improvement of the ground connection. After ameliorating the ground connection, the lightning current will flow into the ground mesh when No.13 tower is stricken by lightning. The arrester won’t receive too much current and achieves the goal of protection of the safe-line module.
參考文獻
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