APPLICATION OF DYNAMIC EQUIVALENCE BASED ON IDENTIFICATION OF COHERENT GENERATOR GROUP IN ENGINEERING

In the program PSS/E the dynamic equivalent model of large-scale power system is established, in which the identification of coherent generator group, aggregation of coherent generators and power network reduction are included. Coherent generators are identified by means of time domain simulation, classical model is applied to aggregation of coherent generators and topological reduction is used for power network reduction. Taking East China power grid for example, the process of establishing equivalent system is expounded, the equivalent system and original system are simulated respectively, and their simulation results are compared. Simulation results show that the equivalent system can well reappear the dynamic characteristics of original system.