為維護用電安全，現今的工廠與居家之低壓配電線路中都裝設過電流及過載保護裝置，於短路及過載時切離電源。有些特定支路還必須安裝漏電斷路器，避免人員感電。當這些保護裝置正確使用時，似乎不需要其它的保護裝置。然而，根據國外調查指出，有些住宅火災發生原因，懷疑是因為電弧故障所引起。電弧故障斷路器(Arc-Fault Circuit Interrupter-AFCI)是一種偵測線路中電弧故障發生的保護裝置，它透過對電弧特性判別來偵測串聯及並聯電弧，在電弧的熱能引起火災前儘早切離電源。本論文針對幾種不同特性的負載，進行串聯電弧故障檢測，經由電弧故障檢測平台收集串聯電弧數據，將實驗數據與相關文獻進行電弧的時頻特性比對及驗證，接著運用時頻分析技巧歸納出六項檢測規則，再使用這六項檢測規則組合出三種檢測方法。最後使用三種檢測方法應用於實驗數據之電弧故障檢測並與商用AFCI的動作結果進行比較。三種檢測方法的確能判斷發生串聯電弧故障，且誤動作的機率不高。本論文找出的檢測方法未來如能開發使用，應可在電弧的熱能引起火災前儘早切離電源，降低火災的發生率。

For the safe use of electric power, it needs to detect the occurring of electric arc faults on the low voltage power circuits and switch off the power source before the occurring of fires. However, many oversea examples reveal the facts that a number of home fires are caused by electric arc faults. The arc-fault circuit interrupter (AFCI) is a device which can detect the occurring of electric arc in the low voltage circuits, and then it can switch off the power source before the occurring of fire caused by series or parallel electric arc faults. In the paper, it is to investigate series arc fault detection of circuits feeding several characteristics of the load. The test data are collected through the arc fault testing platform. The series arc fault will be verified and evaluated the time-frequency characteristics by using the experimental data and compared with relative literature. By combining the time domain-frequency domain techniques, it sums up six detection rules. Then three detecting methods are developed to suppose detecting approaches. Finally, the experimental data with serial arc faults are used to test the detecting methods and compare with the commercial devices. The purposed detecting methods can effectively detect the occurring of series arc faults, and the probability of malfunction is low.

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