Power grid fault judgment method and system based on wave recording source end data mining

The invention discloses a power grid fault judgment method and system based on wave recording source end data mining, and relates to the technical field of power system relay protection, and the method comprises the steps: loading a wave recording data file, and naming and initializing a key element value variable of a fault time sequence feature; determining a fault starting point, and judging and determining the fault starting point; determining a fault removal point, and judging whether the fault removal point is determined or not; determining a reclosing action point, and judging whether the reclosing action point is determined or not; determining a secondary fault starting point, and judging whether the secondary fault starting point is determined or not; and determining a secondary fault removal point, and judging whether the secondary fault removal point is determined or not. According to the power grid fault judgment method based on wave recording source end data mining, power grid fault whole process