Abstract:
In general, power system oscillations are damped out using power
system stabilizer (PSS). Conventional power system stabilizers are based
on linear control theory. Therefore, they provide optimal operation at the
nominal operating point around which the system is linearised during
their designing process.//
Power systems are in general non-linear and their operating point
can vary over a wide range. Power System parameters also change with
time because its configuration changes with time continuously. Therefore,
a conventional power system stabilizer cannot provide better performance
over the whole operating range since it cannot support the deviation of its
parameters. Hence, a controlling method, which can tolerate the small
deviation in system parameters, is highly welcome.//
Fuzzy Logic provides a simple way to arrive at a definite
conclusion based upon vague, ambiguous, imprecise, noisy or missing
input information. So, a controller based on Fuzzy Logic (Fuzzy Logic
Controller) is one of the most promising solutions to the above problem.
Since, it can tolerate the changes in the system parameters, it may provide
a better performance over a wide operating range. Hence, in this research
project, a power system stabilizer based on Fuzzy Logic (FLPSS) has
been designed and various tests have been conducted on it in order to
check its effectiveness. The performance of the designed FLPSS has been
compared with the performance of a particular conventional power
system stabilizer and the FLPSS has shown better performance at each
occasions.
