Voltage sag sorting method considering phase jumps

The invention provides a voltage sag sorting method considering phase jumps. The method includes the following steps that firstly, three-phase voltage amplitude values and phase angles are acquired through sag recording data, three-phase phasors shown in the specification are acquired, and a phasor graph is drawn; secondly, sag information is acquired through phase voltage conditions acquired in the first step, whether three-phase voltages sag or not is judged, and three-phase jump values are calculated through the acquired voltage phase angles; thirdly, according to the sag information acquired in the second step and the sorting method, a sorting result is acquired. When the method is applied to voltage sag sorting, the defect that phase jumps are neglected in an original voltage sag sorting method can be overcome, the real condition of a power system is satisfied, and evaluative criteria and restraint measures which are formulated for power equipment sensitive to the phase jumps have certain reference value.