Experimental Study on the Damping Effect of Transient Swings in a Single Machine Infinite-Bus Power System using a Phase Shifter Control

Abstract

This paper describes the experimental study on the damping effect of transient swings in a laboratory size 3 kVA generator connected to an infinite-bus power system using a phase shifter with tap-changes. The phase-shift injection is implemented by thyristor-associated fast tap-changing based on a simple control rule consisting of the speed and angle deviations during transient conditions of the generator. The digital simulation studies are also carried out to test and compare the control scheme and its dynamic performances. As a result, the numerical studies show good agreement with the experimantal results. The phase shifter control, as an efficient on-line controller utilizing the microcomputer, is verified to damp the transient swings caused by a fault in this system.