Design of a Real-Time Security Assessment Tool for Situational Awareness Enhancement in Modern Power Systems

Detailed security analysis for N-k contingencies ( k = 1, 2, 3, ...) in a real-time setting is still a great challenge due to the significant computational burden. This paper takes advantage of phasor measurement units (PMUs) and decision trees (DTs) to develop a real-time security assessment tool t...

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Bibliographic Details
Published in:IEEE transactions on power systems 2010-05, Vol.25 (2), p.957-965
Main Authors: Ruisheng Diao, Vittal, Vijay, Logic, Naim
Format: Article
Language:English
Subjects:
Assessments
Classification tree
decision tree
Decision trees
Electric potential
online security assessment
Phasor measurement units
Power system analysis computing
Power system measurements
Power system security
Power system stability
Power system transients
preventive control
Real time
Real time systems
regression tree
Security
System testing
Thermal stability
thermal violation
transient stability
Tuning
Voltage
voltage magnitude violation
Voltage stability
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Summary:Detailed security analysis for N-k contingencies ( k = 1, 2, 3, ...) in a real-time setting is still a great challenge due to the significant computational burden. This paper takes advantage of phasor measurement units (PMUs) and decision trees (DTs) to develop a real-time security assessment tool to assess four important post-contingency security issues, including voltage magnitude violation (VMV), thermal limit violation (TV), voltage stability (VS) and transient stability (TS). The proposed scheme is tested on the Salt River Project (SRP) power system represented by a series of operating conditions (OCs) during a representative day. The properly trained DTs demonstrate excellent prediction performance. Robustness tests for the offline trained DTs are performed on a group of changed OCs that were not included for training the DTs and the idea of tuning critical system attributes for preventive controls is also presented to improve system security.
ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2009.2035507