Since a synchronous machine is designed with symmetrical windings, it induces emfs of positive sequence only, i.e The synchronous impedance method or emf method is used to determine the voltage regulation of the larger alternators No negative or zero sequence voltages are induced in it
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When the machine carries positive sequence currents only, this mode of operation is the balanced mode.
This example demonstrates the classical short circuit test of a synchronous machine
The associated discussion of the simulation results serves as a validation of the pscad model. The first aiee “test code” for synchronous machines (#503) was issued in 1945 and formed the basis for the subsequent ieee std 115, which was first published in 1965.
