| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 100 === 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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