A study of electromagnetic transient simulations using IEEJ's West-10 benchmark power system model

• Electromagnetic transient (EMT) simulations of large power systems are now common.
• EMT simulations of IEEJ's West-10 power system model are performed.
• The EMT results are compared with corresponding transient-stability (TS) results.
• In most cases, the EMT results agree well with the corresponding TS results.
• When current zero missing of circuit breakers occurs, different results are obtained.

Electromagnetic-transient (EMT) simulations of relatively-large power systems with generator mechanical dynamics have become quite common especially for studies of power systems including power-electronics converters. The Power and Energy Society of the Institute of Electrical Engineers of Japan (IEEJ) prepared benchmark power system models for transient stability (TS) simulations. Among those, the West-10 benchmark power system model approximately represents the long radial power system in the western part (60-Hz part) of Japan with ten generators. In this paper, the West-10 benchmark power system model is expanded and converted to an EMT model, and it is shown that the results obtained by the EMT model agree well with those obtained by the TS model in most cases. It is also found that when the dc components of fault currents are large the results obtained by those two simulation methods are different due to current zero missing of circuit breakers.