TY - GEN
T1 - A data mining framework for online dynamic security assessment
T2 - 2012 IEEE PES Innovative Smart Grid Technologies, ISGT 2012
AU - He, Miao
AU - Zhang, Junshan
AU - Vittal, Vijay
PY - 2012
Y1 - 2012
N2 - Online dynamic security assessment provides the real-time situational awareness for assessing the impact of various N-k contingencies, so that appropriate preventive/corrective controls could be armed in a timely fashion. This task is challenging due to the large number of possible contingencies, the massive scale of power systems, and the multi-scale dynamics that occur under varying operating conditions. In this study, a data mining framework for online dynamic security assessment using decision trees and a boosting technique is developed, with the following multi-stage processing. 1) In the offline training stage, classifiers consisting of multiple simple decision trees are built based on a given collection of training data, and an iterative algorithm is used to "boost" the accuracy of the classifiers. 2) In the near real-time update stage, the simple decision trees together with their voting weights are updated when new data are available, enabling a smooth tracking of the changes of decision regions. 3) In the online DSA stage, real-time phasor measurements are used to locate the current operating condition into a decision region and obtain timely security decisions. The clustering of contingencies and data preprocessing via dimension reduction of the attributes are also discussed. Numerical testing based on a practical power system demonstrates that the proposed approach works well under a variety of realistic operating conditions.
AB - Online dynamic security assessment provides the real-time situational awareness for assessing the impact of various N-k contingencies, so that appropriate preventive/corrective controls could be armed in a timely fashion. This task is challenging due to the large number of possible contingencies, the massive scale of power systems, and the multi-scale dynamics that occur under varying operating conditions. In this study, a data mining framework for online dynamic security assessment using decision trees and a boosting technique is developed, with the following multi-stage processing. 1) In the offline training stage, classifiers consisting of multiple simple decision trees are built based on a given collection of training data, and an iterative algorithm is used to "boost" the accuracy of the classifiers. 2) In the near real-time update stage, the simple decision trees together with their voting weights are updated when new data are available, enabling a smooth tracking of the changes of decision regions. 3) In the online DSA stage, real-time phasor measurements are used to locate the current operating condition into a decision region and obtain timely security decisions. The clustering of contingencies and data preprocessing via dimension reduction of the attributes are also discussed. Numerical testing based on a practical power system demonstrates that the proposed approach works well under a variety of realistic operating conditions.
UR - http://www.scopus.com/inward/record.url?scp=84860855077&partnerID=8YFLogxK
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U2 - 10.1109/ISGT.2012.6175766
DO - 10.1109/ISGT.2012.6175766
M3 - Conference contribution
AN - SCOPUS:84860855077
SN - 9781457721588
T3 - 2012 IEEE PES Innovative Smart Grid Technologies, ISGT 2012
BT - 2012 IEEE PES Innovative Smart Grid Technologies, ISGT 2012
Y2 - 16 January 2012 through 20 January 2012
ER -