NDLI: Security-constrained unit commitment with AC constraints

Content Provider	IEEE Xplore Digital Library
Author	Yong Fu Shahidehpour, M. Zuyi Li
Copyright Year	1969
Abstract	In a restructured power market, the independent system operator (ISO) executes the security-constrained unit commitment (SCUC) program to plan a secure and economical hourly generation schedule for the day-ahead market. This paper introduces an efficient SCUC approach with ac constraints that obtains the minimum system operating cost while maintaining the security of power systems. The proposed approach applies the Benders decomposition for separating the unit commitment (UC) in the master problem from the network security check in subproblems. The master problem applies the augmented Lagrangian relaxation (LR) method and dynamic programming (DP) to solve UC. The subproblem checks ac network security constraints for the UC solution to determine whether a converged and secure ac power flow can be obtained. If any network violations arise, corresponding Benders cuts will be formed and added to the master problem for solving the next iteration of UC. The iterative process will continue until ac violations are eliminated and a converged optimal solution is found. In this paper, a six-bus system and the IEEE 118-bus system with 54 units are analyzed to exhibit the effectiveness of the proposed approach.
Sponsorship	IEEE Power Engineering Society
Starting Page	1001
Ending Page	1013
Page Count	13
File Size	657414
File Format	PDF
ISSN	08858950
Volume Number	20
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power system security Power markets ISO Power system economics Power generation economics Power generation Costs Power system dynamics Lagrangian functions Dynamic programming security-constrained unit commitment (SCUC) Augmented Lagrangian relaxation Benders decomposition network security constraints testructured power markets
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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