Weckesser, Johannes Tilman Gabriel1; Jóhannsson, Hjörtur1; Østergaard, Jacob1
1 Department of Electrical Engineering, Technical University of Denmark2 Center for Electric Power and Energy, Department of Electrical Engineering, Technical University of Denmark
In this paper, it is investigated how detailed the model of a synchronous machine needs to be in order to assess transient stability using a Single Machine Equivalent (SIME). The results will show how the stability mechanism and the stability assessment are affected by the model detail. In order to identify the transient stability mechanism, a simulation with a high-order model was used as reference. The Western System Coordinating Council System (WSCC) and the New England & New York system are considered and simulations of an unstable and a stable scenario are carried out, where the detail of the machine models is varied. Analyses of the results suggest that a 4th-order model may be sufficient to represent synchronous machines in transient stability studies.
Proceedings of 2013 Irep Symposium, 2013
General Topics for Engineers; Power; Energy and Industry Applications; Generators; Power system stability; Rotors; Stability criteria; Transient analysis