Simulation analysis of chain failures based on relay protection UD modeling

Electric power protection and control system model fail to accurately present the action logic of relay protection,chain failures,therefore,are difficult to simulate.This paper introduces the simulation analysis of chain failures based on relay protection and security automatic equipment UD modeling,establishes relay protection and security automatic equipment model and carries out simulation calculation of chain failures in PSASP.Simulation results show that the simulation analysis of chain failures based on relay protection UD modeling reflects the real action logic of relay protection and dynamic action of electric power system and realizes the simulation analysis of chain failures.