The invention relates to a method for sorting transient severe faults of a power
system. The method includes a first step of trend data and stable calculating data; a second step of generating a
power grid model, a third step of analyzing
ground state trend, a fourth step of initially forming predefined faults, a fifth step of determining and sorting at a post-fault
balance point, a sixth step of determining and sorting
inertia transient, a seventh step of determining and sorting post-
inertia transient, an eighth step of determining and sorting an
exit point, a ninth step of determining and sorting
inertia transient of a minimal gradient point, a tenth step of determining and sorting post-inertia transient of the minimal gradient point, an eleventh step of determining and sorting the minimal gradient point, a twelfth step of determining and sorting faults under an
unstable equilibrium point, and a thirteenth step of obtaining a related severe
fault list.
Content determination standards of different important nodes during a fault trajectory process are fully considered from aspects of the post-fault
balance point, the
exit point, the minimal gradient point and the related
unstable equilibrium point through calculation, and reliability and accuracy of fault scanning are ensured.