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What is the effect of leading power factor for power
transformer & D.G?
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Answer Posted / rabi
The stability of a generator depends on the field strength
of the magnetic field establishing in the air gap by the
rotor ampere turn. if the field is weakened the stability
margin is reduced.
Leading power factor causes field mmf (fm) to reduce and
rotor angle to increase towards 90 degree, the theoretical
operation of stable generation operation. Therefore a
machine operates well within its stability limit factor
with lagging power factor.
Transformer operation does not depend on power factor. For
that reason it is rated in KVA.
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