隨著石化燃料日益枯竭，核能發電再度受到世界各國的重視，除了興建核能機組外，舊有機組也計畫延長使用年限，因此設備好壞，將是機組延長運轉之關鍵，其中電纜也是評核項目之一。目前我國核能電廠評估電纜好壞，主要依據電纜外觀及量測絕緣電阻，但此兩項評估方法並不能完全診斷電纜缺陷，及評斷電纜劣化狀態，為此本研究將藉由多項電性檢測方法來診斷電纜劣化。
　　研究方法係藉以人為方式加速電纜老化，包括輻射、高溫、高濕，以及生物效應，並定期以絕緣電阻、介電損失及局部放電等電性檢測方式監測，以瞭解此三種檢測方法對電纜缺陷與瑕疵的辨識能力，最後由實驗結果分析與核電廠實際搜集/量測資料比較，檢討各項檢測方式之優劣，找出最適宜的診斷方法。
　　依據量測數據整理及分析結果，電纜會隨著不同環境，其老化行為也有所不同，濕熱老化普遍存在於電纜所處環境中，隨著時間累積使電纜逐漸老化，但可透過加載與溫度控制來降低濕熱老化影響，輻射作用除了直接破壞絕緣結構外，長時間低劑量之照射，將使絕緣發生變化，與其他效應結合後，加速電纜老化，生物效應乃直接破壞電纜絕緣厚度，隨著不同老化程度電纜，其破壞效果也有所不同。而在絕緣電阻、介電損失及局部放電等三種檢測方法中，絕緣電阻為最簡便檢測方式，但易受檢測條件影響；介電損失檢測相對絕緣電阻檢測麻煩，但透過靜電容量與散逸因素追蹤，以及其對外加電壓之斜率變化更能有效監測電纜整體劣化趨勢；局部放電可線上檢測電纜，且對外部缺陷及接近壽命終期之電纜最為敏感，但易受於背景環境及量測距離影響；因此若能有效結合三種檢測方法優勢，將可適時診斷電纜劣化。

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