Electric arc detection method, household electrical appliance and computer readable storage medium

Abstract

The invention provides an arc detection method, a household electrical appliance and a computer readable storage medium. The method comprises the following steps that: current signals are obtained, asampling period is divided into a plurality of calculation periods, and the amplitude of a high-frequency signal layer in the current signals is obtained; the accumulated value of the amplitude of thehigh-frequency signal layer of the current signals in each calculation period is calculated, whether the maximum value in the accumulated values corresponding to the plurality of calculation periodsis greater than a preset threshold value or not in one sampling period is judged, and if the maximum value in the accumulated values corresponding to the plurality of calculation periods is greater than the preset threshold value, it is determined that the sampling period is an abnormal sampling period; and whether the abnormal sampling period meets a preset abnormal condition or not in a preset time period is judged, and if the abnormal sampling period meets the preset abnormal condition, arc fault alarm information is sent. The invention further provides a household electrical appliance applying the method and a computer readable storage medium for realizing the method. With the arc detection method, the household electrical appliance and the computer readable storage medium of the invention adopted, the sensitivity and accuracy of arc detection can be improved.

Description

Technical field [0001] The invention relates to the field of electrical appliance fault detection, and in particular, to an arc detection method, a household appliance implementing the method, and a computer-readable storage medium. Background technique [0002] Most of the existing household appliances use 220 volt alternating current. Usually, the household appliances are connected to the socket through a power plug, and electricity is drawn from the socket. During the operation of household appliances, due to the aging or damage of wire insulation, poor contact, etc., fault arc may occur. The temperature of the fault arc spark is very high, which may cause the surrounding combustibles to catch fire and cause fire. Therefore, current sensors are installed on the existing household appliances and safety sockets to collect the current waveforms of the household appliances, and detect arcs based on the current waveforms. Once an arc fault is detected, immediately disconnect the el...

AI Technical Summary

Problems solved by technology

However, in practical applications, there are not many high-frequency signals whose amplitude exceeds the threshold value of the high-frequency signal layer when an arc fault occurs. Therefore, the existing arc detection technology is not sensitive enough, and the detection time of the arc fault Longer, resulting in a longer tripping protection time, affecting the safety of household appliances

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