METHOD FOR REAL-TIME DISCRIMINATION OF TRANSIENT POWER ANGLE DESTABILIZATION BASED ON ACTUALLY-MEASURED RESPONSE INFORMATION

摘要

A method for real-time discrimination of transient power angle destabilization based on actually-measured response information for judging transient power angle stability after a multi-machine interconnected electric power system has failed, comprising: determining an oscillation tie section of a multi-machine interconnected electric power system; acquiring dynamic feature information about the tie section; according to the dynamic feature information about the tie section, when the three conditions are determined to be satisfied at the same time that the active power of a tie line on the oscillation tie section at the i^th moment after a failure is smaller than the active power at the (i-T)^th moment after the failure and the bus voltage phase angle difference thereof is greater than the bus voltage phase angle difference at the (i-T)^th moment after the failure, and the frequency of a sending-end bus of the tie line on the oscillation tie section at the i^th moment after the failure is greater than the frequency at the (i-T)^th moment after the failure, determining that transient power angle destabilization will occur in the multi-machine interconnected electric power system at the i^th moment after the failure, otherwise, determining that transient power angle destabilization will not occur in the multi-machine interconnected electric power system at the i^th moment after the failure, taking full consideration of the nonlinear characteristic of the system, and being capable of accurately analyzing the transient power angle stability after the system is disturbed.