According to some problems in Sichuan power system
which are brought out for the operation of Ertan hydroplant and 500 kV transmission systems in practical application
the Power System Analyze Synthesis Program (PSASP) is used to study the system voltage stabilization under the different operating modes and the typical disturbances by the Power Flow Analyze
the Static Voltage Stabilization Analyze and the Transient Analyze. The conclusions analyzed can be an instruction for secure operation and schedule.