Transient behaviour of salient-pole synchronous machines with internal stator winding faults

Internal stator winding faults in salient-pole synchronous machines can cause serious damage to a machine and the system to which it is connected. Thus, it is highly desirable to be able to accurately model their transient behaviour and to predict the resulting currents and voltages in order to develop appropriate protection schemes, particularly for high power machines. Based on the Multi-loop Circuit Method, a general mathematical model for a salient-pole synchronous machine with internal faults is established, and subsequently employed to simulate both the steady-state and transient behaviour for three different types of internal fault. Predicted results are validated by experimental measurements.