Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/19274
Title: Enhanced Lagrange relaxation for the optimal unit commitment of identical generating units
Authors: Nikolaidis, Pavlos 
Poullikkas, Andreas 
Major Field of Science: Engineering and Technology
Field Category: Environmental Engineering
Keywords: Decomposition;Double decomposition;Economical operation;Generation scheduling;Lagrange relaxation;Low carbon energies;Seamless integration;Technical constraints;Unit commitment problem
Issue Date: 18-Sep-2020
Source: IET Generation, Transmission & Distribution, 2020, vol. 14, no. 18, pp. 3920 – 3928
Volume: 14
Issue: 18
Start page: 3920
End page: 3928
Journal: IET Generation, Transmission & Distribution 
Abstract: Intelligent generation scheduling for seamless integration of uncertain and volatile renewable sources constitutes a crucial solution in delivering future low carbon energy. System operators need to devise effective flexibility adequacy plans for their power systems so as to guarantee power balance and ensure feasible and economical operation over different time horizons and under different generational, environmental and technical constraints. In this work, the authors propose a novel approach for addressing the unit commitment problem of identical generating units, based on Lagrange relaxation framework. The proposed method is characterised by a double decomposition formulation to determine the optimal path for the commitment of identical heat-rate units. This approach is tested and compared to conventional Lagrange relaxation on systems with a number of generating units in the range of 20-100. The proposed approach completely outperforms the conventional alternative in terms of total fuel cost savings, as well as the number of required iterations. In addition, the required iterations are found to increase linearly with system size, which is favourable for large-scale implementations.
URI: https://ktisis.cut.ac.cy/handle/10488/19274
ISSN: 1751-8695
DOI: 10.1049/iet-gtd.2020.0410
Rights: © The Institution of Engineering and Technology
Attribution-NonCommercial-NoDerivatives 4.0 International
Type: Article
Affiliation : Cyprus University of Technology 
Cyprus Energy Regulatory Authority 
Appears in Collections:Άρθρα/Articles

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