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Dynamic economic dispatch using complementary quadratic programming.

Authors :
McLarty, Dustin
Panossian, Nadia
Jabbari, Faryar
Traverso, Alberto
Source :
Energy. Jan2019, Vol. 166, p755-764. 10p.
Publication Year :
2019

Abstract

Abstract Economic dispatch for micro-grids and district energy systems presents a highly constrained non-linear, mixed-integer optimization problem that scales exponentially with the number of systems. Energy storage technologies compound the mixed-integer or unit-commitment problem by necessitating simultaneous optimization over the applicable time horizon of the energy storage. The dispatch problem must be solved repeatedly and reliably to effectively minimize costs in real-world operation. This paper outlines a method that greatly reduces, and under some conditions eliminates, the mixed-integer aspect of the problem using complementary convex quadratic optimizations. The generalized method applies to grid-connected or islanded district energy systems comprised of any variety of electric or combined heat and power generators, electric chillers, heaters, and all varieties of energy storage systems. It incorporates constraints for generator operating bounds, ramping limitations, and energy storage inefficiencies. An open-source platform, EAGERS, implements and investigates this optimization method. Results demonstrate a >99% reduction in computational effort when comparing the newly minted optimization strategy against a benchmark commercial mixed-integer solver applied to the same combined cooling, heating, and power problem. Highlights • Newly developed optimization strategy for unit-commitment/economic dispatch problem. • Open-source platform simulating combined heat, cooling, power, and storage: EAGERS. • Generalized method applicable to grid-connected or islanded district energy systems. • Demonstrated 500× improvement from commercial mixed-integer solver. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03605442
Volume :
166
Database :
Academic Search Index
Journal :
Energy
Publication Type :
Academic Journal
Accession number :
133720370
Full Text :
https://doi.org/10.1016/j.energy.2018.10.087