DocumentCode :
3102440
Title :
Power system vulnerability analysis - towards validation of centrality measures
Author :
Ernster, Timothy A. ; Srivastava, Anurag K.
Author_Institution :
Washington State Univ., Walla Walla, WA, USA
fYear :
2012
fDate :
7-10 May 2012
Firstpage :
1
Lastpage :
6
Abstract :
Threat assessments play a key role in determining appropriate mitigation strategies to counter credible threats to the power system. In order to further understand the capability of a malicious agent to coordinate an attack on the power grid given limited system information, graph theory based centrality measures are utilized for power systems vulnerability analysis. Results are compared to vulnerability analysis indices utilizing DC power flow based linear sensitivity factors with complete power system information. Correlations of centrality and linear sensitivity factor based vulnerability rankings are performed, and matched pair comparisons of top rankings are presented using the nonparametric Wilcoxon signed rank statistical test. Evidence is presented in support of the edge betweeness centrality measure in determining sensitive line outages based solely on the branch impedance values of a power system. Results obtained for four different test case systems indicate the threat potential of a system attack planned from limited topology information.
Keywords :
graph theory; load flow; power grids; power system planning; statistical testing; DC power flow based linear sensitivity factors; branch impedance values; centrality sensitivity factor based vulnerability rankings; graph theory based centrality measures; limited system information; limited topology information; linear sensitivity factor based vulnerability rankings; malicious agent; nonparametric Wilcoxon signed rank statistical test; power grid; power system information; power system vulnerability analysis; sensitive line outages; test case systems; Correlation; Indexes; Load flow; Power measurement; Reliability; Transmission line measurements; DC power flow; centrality; contingency screening; network topology; security analysis; threat assessment; vulnerability;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Transmission and Distribution Conference and Exposition (T&D), 2012 IEEE PES
Conference_Location :
Orlando, FL
ISSN :
2160-8555
Print_ISBN :
978-1-4673-1934-8
Electronic_ISBN :
2160-8555
Type :
conf
DOI :
10.1109/TDC.2012.6281483
Filename :
6281483
Link To Document :
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