Abstract
Owing to the shortcomings of existing series arc fault detection methods, based on a summary of arc volt–ampere characteristics, the change rule of the line current and the relationship between the voltage and current are deeply analyzed and theoretically explained under different loads when series arc faults occur. A series arc fault detection method is proposed, and the software flowchart and principles of the applied hardware implementation are given. Finally, a prototype of an arc fault detection device (AFDD) with a rated voltage of 220 V and a rated current of 40 A is developed. The prototype was tested according to experimental methods provided by the Chinese national standard, GB/T 31143-2014. The experimental results show that the proposed detection method is simple and practical, and can be implemented using a low-cost microprocessor. The proposed method will provide good theoretical guidance in promoting the research and development of an AFDD.
Highlights
An arc is a continuous luminous discharge of electricity across an insulating medium, usually accompanied by a partial volatilization of the electrodes, and is a very complicated electromagnetic reaction process [1]
When a series arc fault occurs in a line, a traditional circuit breaker cannot provide protection because the line current is less than the normal working current [4]
A reliable series arc detection method and protection technology is important for reducing electrical fires
Summary
An arc is a continuous luminous discharge of electricity across an insulating medium, usually accompanied by a partial volatilization of the electrodes, and is a very complicated electromagnetic reaction process [1]. If the number of current waveforms analyzed and conditions as calculated different algorithms have differed greatly under different loads processed is insufficient, thecalculation extraction results of features will be these methods only and have intersected with the for faults of limited. Based on the volt–ampere characteristics load of been deeply analyzed On on this series different arc faultload detection method and a theconditions series arc, has the influence of a series arc fault thebasis, circuita under conditions has been corresponding hardware implementation principle aremethod proposed, a prototype machine deeply analyzed. The difference between the research ideas thethe present and most of theand previous the causes of shoulders, pulse currents, randomness, andand other characteristics ofof series currents under studies conducted is that the former theoretically analyze explain the causes shoulders, pulse different load conditions. The present paper willfault provide good theoretical guidance in promoting the development of arc fault detection and protection devices
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