Simulation of large thermal power plant for protection purposes using ATP/EMTP

This paper presents a step-by-step with important parameters required to simulate real large thermal power plant from generator until high voltage substation and medium voltage auxiliary loads for protection purposes. The selected practical plant is Suez power plant 834 MVA, 50Hz, 22/500 kV in Egypt. The simulation provides a detailed modelling for synchronous generator including generator excitation system and steam turbine control, Generator Circuit Breaker (GCB), Generator Step-Up (GSU) transformer, Unit Auxiliary Transformer (UAT), substation, Isolated Phase Bus (IPB), and Gas Insulated Bus (GIB) using ATP/EMTP. The presented dynamic model has been tested by different faults and normal operation conditions and compared with real recorded data on Suez power plant. The results have confirmed the efficiency of the presented model.