Stability analysis of multiple time delayed power systems using ‘Building Block’ concept

WAMS will play a vital role in the monitoring, analysis, modeling and control of interconnected power system. However, the impact of time delays introduced by WAMS canpsilat be ignored. A novel framework called the cluster treatment of characteristic roots (CTCR) is introduced to analyze the stability of a power system considering the feedback transmission delays. The ldquobuilding blockrdquo concept yields a very practical and efficient procedure for the stability assessment of multiple time delayed systems. This novel perspective serves very well for the preparatory steps of the CTCR method. The complete stability picture of a multiple time delayed single-machine infinite bus (SMIB) system is obtained through the combination of ldquobuilding blockrdquo concept and the CTCR method in time delay space. The validity of this method is verified by time domain simulation results.