Toward Simulation-Free Estimation of Critical Clearing Time

Toward Simulation-Free Estimation of Critical Clearing Time

Contingency screening for transient stability of large-scale, strongly nonlinear, interconnected power systems is one of the most computationally challenging parts of Dynamic Security Assessment and requires huge resources to perform time-domain simulations-based assessment. To reduce computational...

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Bibliographic Details
Published in:IEEE transactions on power systems Vol. 31; no. 6; pp. 4722 - 4731
Main Authors: Thanh Long Vu, Al Araifi, Surour M., El Moursi, Mohamed S., Turitsyn, Konstantin
Format: Journal Article
Language:English
Published: New York IEEE 01-11-2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Assessments
Computation
Computer simulation
Contingency
Critical clearing time
Dynamics
Lyapunov methods
Numerical stability
Power system dynamics
Power system stability
Screening
Simulation
simulation-free
Stability analysis
synchronization
Time domain
Transient analysis
Transient stability
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Summary:Contingency screening for transient stability of large-scale, strongly nonlinear, interconnected power systems is one of the most computationally challenging parts of Dynamic Security Assessment and requires huge resources to perform time-domain simulations-based assessment. To reduce computational cost of time-domain simulations, direct energy methods have been extensively developed. However, these methods, as well as other existing methods, still rely on time-consuming numerical integration of the fault-on dynamics. This task is computationally hard, since possibly thousands of contingencies need to be scanned and thousands of accompanied fault-on dynamics simulations need to be performed and stored on a regular basis. In this paper, we introduce a novel framework to eliminate the need for fault-on dynamics simulations in contingency screening. This simulation-free framework is based on bounding the fault-on dynamics and extending the recently introduced Lyapunov Function Family approach for transient stability analysis of structure-preserving model. In turn, a lower bound of the critical clearing time is obtained by solving convex optimization problems without relying on any time-domain simulations. A comprehensive analysis is carried out to validate this novel technique on a number of IEEE test cases.
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ISSN:0885-8950
1558-0679
DOI:10.1109/TPWRS.2016.2523265