exciter Peak Rating
exciter Peak Rating
(OP)
We are running a motor starting study using ETAP. The study indicates the generator generates more Vars than rated. Is that because overxecitation of the generator? But theoretically the generator should be underexcitated. Generator output voltage is 110%. I am wondering if the settings of the generator is proper.
Appreciate if any inputs.
Appreciate if any inputs.





RE: exciter Peak Rating
Not sure if I understand you correctly.
However if you run your Generator with 110% Rated Voltage you will supply VAR to the Grid. Assuming that you are connected to a grid off course and that the Grid voltege is less than 110% rated.
So you are right. Overexciting a Generator on Grid will push up the Voltage on its terminals and hence pushing out VAR.
RE: exciter Peak Rating
Not sure if I understand you correctly.
However if you run your Generator with 110% Rated Voltage you will supply VAR to the Grid. Assuming that you are connected to a grid off course and that the Grid voltage is less than 110% rated.
So you are right. Overexciting a Generator on Grid will push up the Voltage on its terminals and hence pushing out VAR.
RE: exciter Peak Rating
The load determines the power factor. The power factor may improve with some types of loads.
The throttle position determines the frequency.
If you are in parallel with the grid:
The excitation determines the power factor. Increasing excitation exports more VARs.
The throttle position determines the KW output.
Bill
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"Why not the best?"
Jimmy Carter
RE: exciter Peak Rating
RE: exciter Peak Rating
Those VARs are probably going to the motor rather than to the system. Motor starting current is highly reactive, hence low power factor and high VARs.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: exciter Peak Rating
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If we learn from our mistakes I'm getting a great education!
RE: exciter Peak Rating