P
Prasad
Ramona0304,
This is correct as per theory. The power factor of generator is proportional to ratio MW/MVAr. So any increase in numerator with denominator remaining constant will result in improved power factor. similarly any increase in denominator alone (i.e. MVAr) will result in dropping of power factor.
In a grid, the MW is directly proportional to speed reference. Any change in it will not affect MVAr. Similarly MVAr is directly proportional to magnitude of terminal voltage which is directly proportional to excitation.
So by increasing field excitation, you are increasing terminal voltage of generator. This added terminal voltage will result in generator supplying more MVAr & thus resulting in dropped power factor
This is correct as per theory. The power factor of generator is proportional to ratio MW/MVAr. So any increase in numerator with denominator remaining constant will result in improved power factor. similarly any increase in denominator alone (i.e. MVAr) will result in dropping of power factor.
In a grid, the MW is directly proportional to speed reference. Any change in it will not affect MVAr. Similarly MVAr is directly proportional to magnitude of terminal voltage which is directly proportional to excitation.
So by increasing field excitation, you are increasing terminal voltage of generator. This added terminal voltage will result in generator supplying more MVAr & thus resulting in dropped power factor