Rogowski coil-based method and Rogowski coil-based device for detecting direct-current short-circuit current fault

The invention relates to a Rogowski coil-based method and a Rogowski coil-based device for detecting a direct-current short-circuit current fault. The device comprises a Rogowski coil. A Rogowski coil measurement differential output signal is divided into two paths, wherein one path of the signal is communicated with a high-pass filtering unit, a first voltage comparison unit, a logic gate circuit and a circuit time delay unit in sequence; the other path of the signal is communicated with a low-pass filtering unit and a second voltage comparison unit in sequence; and a Rogowski coil measurement integration output signal is communicated with a third voltage comparison unit. The Rogowski coil-based method and the Rogowski coil-based device for detecting the direct-current short-circuit current fault are based on a protecting strategy of combining two criterions of a short-circuit current amplitude and a short-circuit current rate of rise, and under such a manner, the action reliability of a protecting device is