近年因應全球發展，電力設施的需求因應工廠及商辦的擴建逐年增加，然而輸配電系統卻因土地取得不易及城市規劃等外在因素無法及時擴增，使得既設線路之負擔逐漸加重。
現行輸電系統以架空線路及地下電纜搭配而成，兩者各有其優缺點，以台灣為例，我國自民國54年開始對電纜進行地下化工程，目地為降低天然災害影響、提高供電品質、改善電塔佔地過大及美化市容等，卻因其裝設於地底下易受限於外部環境及電纜架構使得地下電纜的電氣特性劣於架空線，且在設備規模、再生能源及儲能系統之裝設逐年增加下暫態現象之危害也越趨明顯，前述種種因素對於電力品質、敏感設備及施工安全皆有一定程度的影響。
有鑑於此，本論文基於EMTP-RV，使用台灣某公司於國外興建之工廠單線圖及相關資料進行建模，透過改變避雷器裝設模式、地下電纜正副導體遮蔽層交錯接地情境進行不同情況之比較，主要探討上述兩因素對受電端設備遭遇雷擊突波、開關突波等暫態現象之差異，以期能對電網規劃時之絕緣協調及設備選用提出建議，進一步改善建置成本之效益及提高電網穩定性。

In recent years, in response to global development, the demand for electricity facilities has been increasing year by year in response to the expansion of factories and commercial offices, however, the transmission and distribution system cannot be expanded in time due to external factors such as difficulty in acquiring land and urban planning, making the burden of existing lines gradually increase.
In Taiwan, for example, the undergrounding of power lines has been carried out since 1954, with the purpose of reducing the impact of natural disasters, improving the quality of power supply, improving the oversized area of towers, and beautifying the city, but the electrical characteristics of underground lines are inferior to those of overhead lines because they are installed underground and easily restricted by the external environment and cable structure. In addition, the hazard of transient phenomenon is becoming more and more obvious under the increasing installation of equipment scale, renewable energy and energy storage system year by year, and the aforementioned factors have a certain degree of impact on power quality, sensitive equipment and construction safety.
Based on EMTP-RV, this paper uses a single-line diagram of a factory built in foreign and related data for modeling, and compares different situations by changing arrester arrangement and multiple conductor cables shielding layer asymmetrical Cross-Bonding grounding. The purpose of this study is to suggest the insulation coordination and equipment selection for further improving the cost effectiveness and the stability of the grid.

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