Arc discharge fault identification method based on triangular wave width ratio and double-threshold setting

The invention discloses an arc discharge fault identification method based on triangular wave width ratio and double-threshold setting. According to the invention, through voltage waveform analysis, on the premise of ensuring the identification of the arc grounding fault, the requirement on the sampling frequency is greatly reduced, the requirement on a sampling chip is reduced, and the overall cost is reduced. And b (i) = W (i)-W (i + 1) is constructed, and the rising edge width a1 and the falling edge width a2 of the triangular wave are automatically identified according to the change condition of b (i). And finally, arc discharge fault judgment is carried out according to the criteria that N is greater than 2 and W is greater than 1000. According to the invention, the arc discharge fault can be identified at low cost. 本发明公开了一种基于三角波宽度比和双门限设定的弧光放电故障识别方法。本发明中通过电压波形分析，在保证识别弧光接地故障的前提下，对采样频率的要求会降低很多，降低对采样芯片的要求、降低整体造价。构造b(i)＝W(i)-W(i+1)，根据b(i)的变化情况自动识别三角波的上升边宽度a1和下降边宽度a2。最后根据判据N>2且W>1000且进行弧光放电故障判断。通过本发明能够保持低造价地识