Eaton EMR-4000 - Page 639

EMR-4000 IM02602009E
Equivalent circuit at mains failure.
In case of mains failure or auto-reclosing, the generator suddenly feeds a very high load. The rotor displacement angle
is decreased repeatedly and the voltage vector V1 changes its direction (V1').
Voltage vectors at mains failure.
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Grid
V´ = I´
1
* j Xd
V
P
V´
1
I
1
Generator Load
V
P
V
1
V´
1
V´ = I´
1
* j Xd