F
Reading Electric Machinery Fundamentals- Chapman
It explains how the field current in the generator controls the reactive power supplied by the generator to the system.
I understand everything in the explanation except this:
The book considers the real power of the generator to be constant. Meaning that, changing de field current does not affect the Real Power supplied.
So here is my question:
How changing the field current of the generator doesn't affect the real power?
This is driving me crazy !
First, because the torque induced is proportional to the magnetic field of the rotor, and since we are increasing it. The power also increases: Pconv = Tind * w.
I can see how the reactive power changes with the field current, but I believe there is also a variation in the real power. Because when I draw the phasor diagram, increasing If changes |Ea|, and since Power supplied is proportional to Ea * sin(delta), I can't see how the real power is unaffected.
It explains how the field current in the generator controls the reactive power supplied by the generator to the system.
I understand everything in the explanation except this:
The book considers the real power of the generator to be constant. Meaning that, changing de field current does not affect the Real Power supplied.
So here is my question:
How changing the field current of the generator doesn't affect the real power?
This is driving me crazy !
First, because the torque induced is proportional to the magnetic field of the rotor, and since we are increasing it. The power also increases: Pconv = Tind * w.
I can see how the reactive power changes with the field current, but I believe there is also a variation in the real power. Because when I draw the phasor diagram, increasing If changes |Ea|, and since Power supplied is proportional to Ea * sin(delta), I can't see how the real power is unaffected.