A Transmission-Constrained Unit Commitment Method

Chung-Li Tseng, Missouri University of Science and Technology
Chao-An Li
S. S. Oren
C. S. Cheng
A. J. Svoboda
R. B. Johnson

This document has been relocated to http://scholarsmine.mst.edu/engman_syseng_facwork/241

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