A comparative study between the performance of the fixed gain PID and the adaptive self-tuning power system stabilizers

Design of fixed gain PID stabilizer based on pole assignment technique is described, in order to show the advantages of property tuning method for PID algorithm as an accepted way to save the controller efforts as well as to achieve a good performance, and in contrast to discuss the necessity of adaptive control in power system application. A self-tuning PID power system stabilizer using pole placement technique (pole assigned-pole shifting) has been designed to solve the problem of real time parameters adaptation, which enables the proposed stabilizer to maintain the power system at the optimum operation over wide range of operating conditions. Due to random variations of the generator loading conditions and to confirm the effectiveness of the designed stabilizers, they have been tested at different operating conditions and line reactance. The results obtained by computer simulation are compared to exhibit the improvement in response obtaining the adaptive algorithm.