Electric power system transient state stable real-time emergency control method based on relative kinetic energy

The invention discloses an electric power system transient state stable real-time emergency control method based on relative kinetic energy. By means of the method of judging rotative speed difference-power angle difference variation tendency, the transient state stability of the system is monitored in real time to serve as a start-up condition of emergency control. When the fact that the system loses the power angle stability is judged, a remaining accelerating area is calculated based on the relative kinetic energy in a two-machine system, and a generator tripping value is calculated and controlled through the equal-area criterion. During the control decision process, the action delay time is taken into consideration, and the calculation results are enabled to be more reliable. The electric power system transient state stable real-time emergency control method based on the relative kinetic energy overcomes the defects that when an offline calculation is conducted, operation modes and obstructions need to be anticipated, and the flexibility is insufficient when a small probability accident is handled, and can be complementary to a security and stability control system, a new defense line is built to prevent the system from deteriorating further even causing a big blackout accident, the power grid safety and stability defense system is enriched, and the safety and stability operation level of the electric power system is improved.