Arc fault detection method, device and storage medium

Abstract

The invention discloses a fault arc detection method, device and storage medium. The method includes the following steps: Step 1): Perform arc detection on the power transmission line, use the time when the arc is detected for the first time as the starting point of timing, and use an internal clock for timing , continuously carry out half-wave cycle sampling to the current in the transmission line within the preset period; step 2): record the parameter characteristics of the detected current change in the transmission line; step 3): compare the parameter characteristics with the pre-stored reference Compare the data to determine whether there is an arc in the half-wave period; step 4): judge whether there is a fault arc according to the periodicity and quantity of arc occurrence in the preset period. The invention detects arc faults by simulating the half-wave cycle with software, which makes the arc fault detection process independent of the AC zero-crossing point, simplifies the circuit structure, and provides technical support for the development of arc fault detection devices in the direction of a split structure.

Description

technical field [0001] The present invention relates to fault arc detection technology, in particular to a fault arc detection method, device and storage medium. Background technique [0002] At present, arc faults are one of the main causes of electrical fires. Arc fault detectors, as monitoring equipment for electrical fires, can effectively reduce the probability of electrical fires in the monitored area. Therefore, the detection and treatment of arc faults is becoming increasingly important. [0003] The traditional fault arc detection method is realized on the basis of arc detection combined with a zero-crossing detection circuit. Therefore, when arc detection is performed, it needs to use a zero-crossing detection circuit combined with the period of the AC voltage zero-crossing point for timing. This detection method The disadvantage is that it needs to rely on the zero-crossing detection circuit to measure the arc cycle, which is not conducive to the simplification of...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the increase of zero-crossing detection lines, the internal lines of the control unit increase, resulting in an increase in the calculation of the main control unit, which will inevitably affect the response speed of the main control unit;

[0006] 2. Since the control unit is connected to multiple arc detection units, there are many wiring connections in the space, so its installation and maintenance are difficult, and when the number of lines to be protected is large, the number of arc detection units in the system cannot be unlimited However, in practical applications, in order to adapt to the number of lines to be protected, it is necessary to increase the number of fault arc detection systems, so it is difficult to fundamentally solve the problem of space occupation

[0007] Based on this, the above-mentioned published patents can alleviate to a certain extent the problems of space occupation and cost increase caused by a small increase in lines to be protected. Fundamentally solve the problem of space occupation existing in the prior art, and then cannot guarantee the response speed and accuracy of fault arc judgment

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