A transmission-constrained unit commitment method in power system scheduling

A transmission-constrained unit commitment method in power system scheduling

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Article ID: iaor2001274
Country: Netherlands
Volume: 24
Issue: 3/4
Start Page Number: 297
End Page Number: 310
Publication Date: Jan 1999
Journal: Decision Support Systems
Authors: , , , , ,
Keywords: lagrange multipliers
Abstract:

This paper presents a transmission-constrained unit commitment method using a Lagrangian relaxation approach. Based on a DC power flow model, the transmission constraints are formulated as linear constraints. The transmission constraints, as well as the demand and spinning reserve constraints, are relaxed by attaching Lagrange multipliers. A three-phase algorithmic scheme is devised including dual optimization, a feasibility phase and unit decommitment. A large-scale test problem with more than 2200 buses and 2500 transmission lines is tested along with other test problems.

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