The main objective of load frequency controller is to apply control of
Frequency alone
Frequency and at the same time of
real power exchange via the outgoing lines
Frequency and at the same time of
reactive power exchange via the outgoing lines
Frequency and bus voltages
Frequency and at the same time of
real power exchange via the outgoing lines
The main goals of load
frequency control (LFC) i to maintain the real frequency and the desired power
out (MW) in the interconnected power system. JL load frequency controller, the
change in frequency and the tie-line real power are sensed which measure of the
change in rotor angle 
.
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