Answer / amol

As the load increases the speed of turbine decreses to
maintain the altenator output constant.
As the turbine speed reduces the frequency is reduces
because f is directly related to speed.

Same happens in case of reduction in load ie as load
reduces frequency increases.

Answer / shiv sharma

frequency control is the difference b/w generation and
load ,if your load is greater than your generation then
frequency would decrease and similarly if your generation
is more than your load ,frequency would increase.If both
values are equal then frequency would remain stable i.e 50
hz in india.

Regards,
Shiv

Answer / deepak mishra

When the electrical load on generator is increased suddenly i.e. the electrical power is more than the mechanical input. This difference in power is compensated by stored kinetic energy in rotor, now there is a continuously reduction in stored kinetic energy, resulting drop in turbine speed and corresponding reduction in generator frequency.

Answer / ghazi

since we know that if we cosider induction motor speed
=120f/p since on increasing load ....speed varries
(decreases) hence frequency changes.

Answer / k.prakashchandra

dF= dQ/dL where Q is generating capacity in the system

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