الفهرس 
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Abstract
This thesis is concerned with the investigation of an adaptive
controller for a synchronous generator connected to an through a double-circuit transmission line. The design PID power system stabilizer has been presented, show that the fixed-gain PID power system stabilizer (PSS)
s reasonably well over a medium range of operating conditions. ver, the damping may diminish as the generator load changes or configuration is altered by faults or other switching This leads to deterioration in the stabilizer Therefore autotuning stabi I i zers are required for tive control over a wide range of operating conditions. This e done using self-tuning regulators (STR) which identify the em under different operating condi tions and provide the control Ion accordingly. simulation of a synchronous generator subject
jor disturbances at different operating conditions, including short circuit, has been developed to demonstrate the of the proposed controller. comparative study has been effectuated between a fixed-gain r system stabilizer and the proposed adaptive stabilizers,
ious changes in the operating conditions. It was shown that
ptive power system stabilizer can stabilize the synchronous tor for different operating conditions, and it can damp the oscillations in a short period.