n electrically excited synchronous machine is running with synchrous speed. The RMS values of the open circuit machine voltages and mains voltage are equal. Tha phase shift if the machine and mains voltages are euqal.

After 0.1 seconds the synchronization switch closes. The shaft of the synchronous machine is mechanically not connected, such that neither mechanical speed nor torque are fixed. As the machine and mains voltages are equal for each phase, there are neither electrical nor mechanical reactions of the machine on the closing switch.

The intention is to compare the results of the following simulation models in one plot:

Plot the following variable(s)

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