NDLI: Transmission and ramp constrained unit commitment using enhanced adaptive Lagrangian relaxation

Content Provider	IEEE Xplore Digital Library
Author	Ongsakul, W. Petcharaks, N.
Copyright Year	2005
Description	Author affiliation: Asian Inst. of Technol., Pathumthani (Ongsakul, W.)
Abstract	This paper proposes an enhanced adaptive Lagrangian relaxation (ELR) for transmission and ramp constrained unit commitment (TRUC) problem. ELR minimizes the total supply cost subject to the power balance, up and down 15 minute spinning reserve response time constraint, generation ramp limit constraints, on/off line minimum level constraints, minimum up and new down time constraints, generator operating constraints, and transmission lines constraints. ELR is enhanced by new minimum down time to account for startup and shut down ramp constraints, new initialization to obtain a high quality initial solution, transmission constrained dynamic economic dispatch to include the operating ramping limits, and adaptive Lagrangian multipliers to speedup the convergence. If the 24 hour schedule is feasible, transmission constrained dynamic economic dispatch by quadratic programming is used to minimize the production cost subject to the power balance, new generation ramp operating frame limit, and transmission line constraints. In addition, the alleviating congestion index is proposed for congestion management. For hours with insufficient 15 minute response time spinning reserves, repairing strategy by quadratic programming is used. The proposed ELR algorithm is tested on the 26 unit IEEE reliability test system. It is shown that ELR could obtain a higher quality solution than both dynamic economic dispatch based on artificial neural network and dynamic priority list.
Starting Page	1
Ending Page	8
File Size	329949
Page Count	8
File Format	PDF
ISBN	9785932080344
DOI	10.1109/PTC.2005.4524599
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-27
Publisher Place	Russia
Access Restriction	Subscribed
Rights Holder	Energy Systems Institute
Subject Keyword	Lagrangian functions Power generation Power generation economics Costs Spinning Delay Power transmission lines Quadratic programming System testing Time factors Transmission and ramp constrained unit commitment Transmission constrained dynamic economic dispatch Lagrangian relaxation
Content Type	Text
Resource Type	Article

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