Abstract:
Previous works in the field of power system stability adopting the concept of
supplementary signal were mostly dedicated to stabilize all system modal instabilities.
In this paper a study is made to identify the particular type of supplementary signal
most-effective in increasing the damping introduced to the excitation system over a
specific power system mode of instability. To this end, a series of MATLAB algorithms
were developed and the results obtained yielded a set of supplementary signals to be
introduced to the excitation of a single machine infinite bus-bar power system. The
effect on increasing damping over a particular system mode is evaluated. The outcomes
from extensive case studies confirmed the validity of the proposed approach.