Abstract:
Power system stabilizers (PSSs) are added to excitation system or control loop of
the generating unit to enhance the damping during frequency oscillations.
This research presents a fuzzy logic controller as power system stabilizer for
stability enhancement of a single machine and multi-machine power system.
In order to accomplish the stability enhancement, deviation of speed (∆ù) and
acceleration (∆þ) of the rotor of synchronous generator were taken as the input to
the fuzzy logic controller. These variables produce significant effects on damping
of the generator shaft mechanical oscillations. The simulations were tested under
different operating conditions.
The responses of stabilizing signal were computed using fuzzy controller. The
performance of the fuzzy power system stabilizer is compared with the
conventional proportional-Integral-Derivative controller (PID controller) It is
found that
the results of
fuzzy PD+I controller are quite encouraging and
satisfactory.
