WD5寬型輸電鐵塔之耐震能力探討

因應北部核一、核二、協和等電廠穩定電源陸續除役，為解決未來台灣地區用電缺口及配合政府再生能源政策，台電公司需配合新建彰工～彰濱345kV線，將離岸電力併入台電公司電力網。該新建線路位於彰化濱海工業區內，因濱海地區鐵塔鹽害銹蝕問題，故配合鐵塔維護更換而開發了寬型鐵塔。台電公司輸電鐵塔的設計規範均係採風力設計，一般認為地震力對於鐵塔的影響較小，本文採用MIDAS結構分析程式就WD5寬型鐵塔之耐震能力進行深入探討，除以台電材料規範、鋼結構設計規範（包含容許應力設計法及極限設計法），以及桿件斷面實際應力等方式對鐵塔進行耐震能力之安全檢核外，並深入探求寬型鐵塔之耐震程度，以確保鐵塔結構之安全，進而維護台電公司輸電系統電力輸送之穩定性。

關鍵字

輸電鐵塔；寬型鐵塔； MIDAS結構分析程式；鐵塔耐震能力；鐵塔耐震程度

並列摘要

In light of the gradual decommissioning of stable power sources such as Taiwan’s First Nuclear Power Plant, Second Nuclear Power Plant, and Hsieh-ho Power Plant, the project of Taiwan Power Company (Taipower) will require the construction of 345kV lines. The proposed power lines are located inside the Changhua Coastal Industrial Park (also referred to as Changbin), and extend from the Changbin Extra-High Voltage Substation to the Changgong Booster Station. Due to the problem of salt corrosion in steel transmission towers in coastal areas, wide-type transmission towers have been developed to facilitate tower maintenance and replacement. Based on the load combinations of the design specifications, the design force of Taipower's transmission towers is generally dominated by the wind forces and seismic forces are regarded to have less impact on transmission towers. This study used the MIDAS structural analysis software to perform in-depth investigations on the seismic resistance of the WD5 wide-type transmission tower. In addition to performing safety assessments of the seismic resistance of the towers based on standards such as Taipower's material specifications, design specifications of steel structures (including allowable strength design and ultimate strength design methods), and the actual stress experienced by the cross section of a member, the resistance of the WD5 wide-type transmission towers was also investigated thoroughly, so as to ensure the structural safety of the towers and, thereby, maintain the stability of Taipower's power supply systems.

並列關鍵字

system identification ； green roof ； health monitoring ； seismic response

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