A comparative study between PI,PD,PID and lead-lag controllers for power system stabilizer

Abstract

Stability of power system is an important factor in electric system operation. In this paper, power system stabilizer(PSS) based on four controllers were implemented on a single machine infinite bus system for attaining stability. Four controllers used were PI,PD,PID and lead-lag. Then a comparison study was done with the above controllers. These results were simulated in MATLAB. Each controller has its own advantages and disadvantages. The comparative study was done for speed deviations, load angle deviations and terminal voltage deviations. Then the lead-lag controller was tuned using Particle Swarm Optimization method and was optimized.