Eaton EMR-4000 - Page 638

EMR-4000 IM02602009E
Measuring Principle of Vector Surge Supervision
Equivalent circuit at synchronous generator in parallel with the mains.
Voltage vectors at mains parallel operation.
The rotor displacement angle between stator and rotor is dependent on the mechanical moving torque of the generator
shaft. The mechanical shaft power is balanced with the electrical fed mains power and, therefore, the synchronous
speed keeps constant.
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Grid
V = I
1
* j Xd
V
P
V
1
I
1
I
2
Grid/Load
Generator
V
P
V
1
V = I
1
* j Xd