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An Optimal Power Flow Algorithm for the Simulation of Energy Storage Systems in Unbalanced Three-Phase Distribution Grids

Held, Lukas; Mueller, Felicitas; Steinle, Sina; Barakat, Mohammed; Suriyah, Michael R.; Leibfried, Thomas

Abstract:
An optimal power flow algorithm for unbalanced three-phase distribution grids is pre-sented in this paper as a new tool for grid planning on low voltage level. As additional equipmentlike electric vehicles, heat pumps or solar power systems can sometimes cause unbalanced powerflows, existing algorithms have to be adapted. In comparison to algorithms considering balancedpower flows, the presented algorithm uses a complete model of a three-phase four-wire low voltagegrid. Additionally, a constraint for the voltage unbalance in the grid is introduced. The algorithm canbe used to optimize the operation of energy storage systems in unbalanced systems. The used gridmodel, constraints, objective function and solver are explained in detail. A validation of the algorithmusing a commercial tool is done. Additionally, three exemplary optimizations are performed to showpossible applications for this tool.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130755
Veröffentlicht am 19.03.2021
Originalveröffentlichung
DOI: 10.3390/en14061623
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Elektroenergiesysteme und Hochspannungstechnik (IEH)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1996-1073
KITopen-ID: 1000130755
Erschienen in Energies
Verlag MDPI
Band 14
Heft 6
Seiten Article no: 1623
Vorab online veröffentlicht am 15.03.2021
Schlagwörter optimal power flow; OPF; three-phase optimal power flow; TOPF; distribution grid; lowvoltage grid; unbalanced power flow; battery storage; energy storage
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