Subsynchronous oscillations part 2 ߞ shaft-system dynamic interactions

This paper presents a close analysis of the stability of subsynchronous oscillations in a radial series compensated power system. A frequency response analysis is used. The analysis covers varying levels of detail in generator electrical and mechanical modeling and thereby illustrates the mechanism by which subsynchronous oscillations can become unstable. The basic purpose of this paper is tutorial; a companion paper discusses its mathematical basis and full scale application of its method.