NDLI: Robust transmission constrained unit commitment: a column merging method

Content Provider	IET Digital Library
Author	Li, Xuan Zhai, Qiaozhu Guan, Xiaohong
Abstract	With the rapid integration of power sources with uncertainty, robustness must be carefully considered in the transmission constrained unit commitment (TCUC) problem. The overall computational complexity of the robust TCUC methods is closely related to the vertex number of the uncertainty set. The vertex number is further associated with: (i) the period number in the scheduling horizon, (ii) the number of nodes with uncertain power injections. In this study, a column merging method (CMM) is proposed to reduce the computational burden by merging the uncertain nodes, while still guaranteeing the robustness of the solution. By the CMM, the transmission constraints are modified, with the parameters obtained based on an analytical solution of a uniform approximation problem, so that the computational time for obtaining the modified constraints is negligible. The CMM is applied under a greedy-algorithm-based framework, where the number of merged nodes and the approximation error can be well balanced. The CMM is designed as a preprocessing tool to improve the solution efficiency for robust TCUC problems and is compatible with many solution methods (like two-stage and multi-stage robust optimisation methods). Numerical tests show the method is effective.
Starting Page	2968
Ending Page	2975
Page Count	8
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 15, Aug (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.6314
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-06-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analytical Solution Approximation Theory CMM Column Computational Burden Computational Complexity Computational Time Greedy Algorithm Greedy-algorithm-based Framework Merged Node Modified Constraint Optimisation Optimisation Technique Period Number Power Generation Dispatch Power Generation Scheduling Power Source Power System Economics Power System Managemen Power System Operation Rapid Integration Robust TCUC Method Robust TCUC Problem Robust Transmission Constrained Unit Commitment Scheduling Horizon Solution Efficiency Solution Method Transmission Constrained Unit Commitment Problem Transmission Constraint Two-stage Uncertain Node Uncertain Power Injections Uniform Approximation Problem Vertex Number
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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