研究生: |
鍾慶茂 CHIANG-MAO CHUNG |
---|---|
論文名稱: |
161 kV 交連PE地下電纜老化問題之研究 A Study of Aging Problems in 161 kV XLPE Underground Cables |
指導教授: |
蕭弘清
Horng-Ching Hsiao |
口試委員: |
王順源
Shun-Yuan Wang 辜志承 Jyh-Cherng Gu |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電機工程系 Department of Electrical Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 132 |
中文關鍵詞: | 地下電纜 、老化 |
外文關鍵詞: | 161 kV XLPE, Underground Cables Aging |
相關次數: | 點閱:444 下載:4 |
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由於國內經濟快速成長,對電力的需求不斷增加,台電原有的69 kV供電設施已不敷使用,必須全面改用161 kV供電系統俾擴大饋線供電容量及供電品質;且因為對都市景觀、電力品質及供電的穩定性等要求,架空輸電線路地下化乃成為未來供電業亟待解決之課題。
目前作為161 kV地下電纜絕緣材料大多數均為低密度交連聚乙烯(簡稱XLPE),因其具有良好的電氣特性、機械特性和可撓性,且耐臭氧腐蝕及抗化學藥劑等亦相當優異,是當今世界上公認為161 kV地下電纜最佳絕緣材料。雖然地下電纜的壽命在正常電場強度和常溫環境中可使用三十年以上;但卻常因老化問題或施工不當而大幅降低其使用壽命,成為急待解決之技術問題。
本論文係針對161 kV 交連PE電纜的構造特性與老化問題進行研討,並藉由長時間循環老化試驗的各項結果,將電纜線路發生老化的原因和演變過程作有系統的分析,最後找出各種老化的形態與診斷技術,可作為進一步線上即時偵測技術研發之參考。
Due to the fast growth of domestic economy, the power demand has been continuously increasing, So that, the capacity of Taiwan Power Company (TPC) existing 69 kV power supply system has not be sufficient to meet current demand, TPC is forced to upgrade the distribution power system to the upper level of 161 kV system completely for higher capacity of feeder cable and higher quality of power supply. Besides, in pursuit of nice city outlook, good power quality and reliable power supply system, the implementation of underground cabling project to replace existed overhead transmission lines will be a bruning issue for TPC.
Currently, the material to be used on 161 kV underground system is the cross-linked polyethylene (XLPE). The material is inherent with good electric and mechanic performances, high flexibility, and anti-corrosions both on ozone and chemic, etc. It also has been verified as the best insulation material for 161 kV underground cable. Generally speaking, the lifetime of the underground cable can be used more than 30 years under the conditions of normal ambient temperature and electrical field., however, the lifetime can be reduced because of improper construction or aging problem is a critical matter needs to be solved as well.
The thesis mainly focuses on the studies of the physical configuration and aging phenomena of 161 kV XLPE cable, through the various results of long term cycled aging test, it makes possible to analyze the root causes systematically and evolutionary changes and finally identifies all different types of aging phenomena and diagnosis techniques for further research of on-line detection.
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