Power system transient stability comprehensive judgment method based on actually-measured trajectory of WAMS and system

The invention discloses a power system transient stability comprehensive judgment method based on an actually-measured trajectory of a WAMS and system. The method comprises steps: two trajectory criteria with a fast judgment speed and high requirements for data quality and equivalent accuracy are used as early warning links, and other four relatively-reliable criteria with similar judgment speedsbut not high requirements for data quality are used as final stability judgment links. The six selected trajectory criteria are combined by using a logic of early warning and judgment, the early warning links ensure to respond to the possible changes in the transient stability of the system as soon as possible, and time is obtained for subsequent splitting operation; four criteria in the judgmentlinks ensure that the system can accurately and reliably make a system stability judgment in an extreme scenarios; and the successive relationship among trajectories is searched in a time sequence, the respective advantages ar