Power system stabilization has been, and still is, a major interest of rese
archers in the area of power systems, Recently, modern control techniques b
ased on ar artificial intelligence, like artificial neural networks and fuz
zy logic, presented elegant and neat solutions for power system stabilizati
on; however, some of these techniques face resistance of the control engine
ers who are not yet famil iar with artificial intelligence. This paper intr
oduces a hybrid fuzzy PID power system stabilizer (FPID) that retains the n
ature of the conventional PID controller and enhances its performance using
fuzzy logic. The fuzzy logic provides on-line automatic adjustment of the
PID parameters. Tuning of initial FPID parameters is similar to that of a c
onventional PID controller. The proposed controller proves, through extensi
ve simulation tests for different machine operating points and under differ
ent disturbances, that it outperforms techniques based on either convention
al PID or conventional fuzzy logic controller (FLC).