Applicability of a flow-based grid representation in spatially resolved generation expansion planning models

Floor Serrien, Jelle Meus and Erik Delarue

Applied Energy, 2025, vol. 381, issue C, No S0306261924025406

Abstract: Generation expansion planning models (GEPMs) support decision-makers in developing the future energy system. Research indicates that the accuracy of a GEPM improves with increased spatial granularity, as these models are able to leverage geographic variations in weather conditions and electricity demand. The outcome of such spatially resolved models, however, can be significantly distorted when employing a simplified representation of the transmission grid. Then again, considering detailed power flows and individual transmission limits is often computationally intractable. We propose a novel approach to incorporate transmission constraints in spatially resolved GEPMs, inspired by the flow-based market coupling algorithm in the European Core Region. This approach is benchmarked against two commonly used grid representations in GEPMs, i.e. a nodal and net transfer capacity representation. The flow-based approach significantly enhances computational efficiency, while closely approximating the accuracy of a nodal GEPM.

Keywords: Generation expansion planning; Transmission constraints; Flow-based market coupling; Spatial resolution (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1016/j.apenergy.2024.125156

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