FAULT ARC DETECTION METHOD AND DETECTION DEVICE

摘要

A fault arc detection method includes: sampling an instantaneous current value of a circuit; using the instantaneous current value to predict a current peak value and, when the predicted current peak value is greater than a predetermined threshold, determining that a first energy fault arc is to appear; and comparing a time domain or frequency domain feature of the instantaneous current value with a reference time domain feature or a reference frequency domain feature of the current of a fault arc of the circuit. When the similarity between the time domain or frequency domain feature and the reference time or reference frequency domain feature of the current of the fault arc reaches a predetermined range, a second energy fault arc is determined to appear. The method and detection device detect the occurrence of a fault arc early and they are able to distinguish different types of fault arcs.

主权项

1. A fault arc detection method, which comprises:
(a) sampling an instantaneous current value of a circuit; (b) using the instantaneous current value to predict a current peak value and, when the predicted current peak value is greater than a predetermined threshold, determining that a first energy fault arc is to appear; and (c) comparing a time domain feature or a frequency domain feature of the instantaneous current value with a reference time domain feature or a reference frequency domain feature of the current of a fault arc of the circuit and, if a similarity between the time domain feature or the frequency domain feature of the instantaneous current and the reference time domain feature or the reference frequency domain feature of the current of the fault arc of the circuit reaches a predetermined range, determining that a second energy fault arc appears.