Arc fault rapid detection method and system, and storage medium

The invention discloses an arc fault rapid detection method and system, and a medium. The method comprises the following steps: sampling a current differential signal in a line to be detected; calculating the fractal dimension of the current differential signal per 100 microseconds in real time in a mode of recurring one sampling point in sequence; sequentially comparing the real-time fractal dimension with an arc judgment threshold DThld which is set in advance based on an average value of the fractal dimensions when the to-be-detected line works normally; and if continuous ten real-time fractal dimensions are all smaller than the arc determination threshold DThld set based on the average value of the fractal dimensions when the to-be-detected line works normally, determining that the to-be-detected line has an arc fault. Compared with the prior art, the arc fault detection speed, the detection precision and the anti-interference capability are improved. 本发明公开了一种电弧故障快速检测方法、系统及介质，该方法包括步骤：对待测线路中的电流差分信号进行采样；通过依