Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 578291, 20 pages
Research Article

Structural Analysis of Large-Scale Power Systems

School of Automation, Southeast University, Nanjing, Jiangsu 210096, China

Received 9 December 2011; Revised 14 February 2012; Accepted 16 February 2012

Academic Editor: Xi-Ming Sun

Copyright © 2012 K. F. Zhang and X. Z. Dai. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Some fundamental structural characteristics of large-scale power systems are analyzed in the paper. Firstly, the large-scale power system is decomposed into various hierarchical levels: the main system, subsystems, sub-subsystems, down to its basic components. The proposed decomposition method is suitable for arbitrary system topology, and the relations among various decomposed hierarchical levels are explicitly expressed by introducing the interface concept. Then, the structural models of various hierarchical levels are constructed in a bottom-up manner. The constructed hierarchical model can reveal the self-similarity characteristic of large-scale power systems.