High-Response Excitation Systems on Turbine-Generators: A Stability Assessment

Abstract

This paper provides the power system designer with some guidelines concerning what measure of stability improvement can be expected with highresponse vs. normal response excitation systems for turbine-generators. Transient and oscillatory stability study results are illustrated showing how critical fault clearing time (CFCT) and unit damping performance vary as a function of excitation system response characteristics. The results show CFCT gains under most conditions to be quite small.