Journal
APPLIED ENERGY
Volume 290, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2021.116712
Keywords
Energy system optimization; Operational constraints; Power system planning; Representative periods; Time series reduction; Unit commitment; Variable renewable energy
Categories
Funding
- Jenny and Antti Wihuri Foundation
- Strategic Research Council at the Academy of Finland [314319]
- European Union [774629, 864276]
- H2020 Societal Challenges Programme [774629] Funding Source: H2020 Societal Challenges Programme
- Academy of Finland (AKA) [314319, 314319] Funding Source: Academy of Finland (AKA)
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The study highlights the importance of selecting appropriate representations for different energy systems to improve planning accuracy, recommending testing multiple temporal and technical approaches to ensure feasibility and enhance planning results.
Planning of future energy systems with higher prevalence of wind and solar energy requires a careful representation of the temporal and operational characteristics of the system in the investment planning model. This study aims to identify the aspects that should be considered when selecting the representation for a particular system. To demonstrate the impacts that various model representations have in terms of model accuracy and computational effort, we carry out case studies on two test systems implemented within the Backbone energy systems modelling framework. The results show that the temporal and operational representations have different benefits and weaknesses in different system types. The findings provide general guidelines on the relative importance of different model details, depending on the characteristics of the system under study. For example, some temporal sampling strategies can better capture long-term storage needs, while others are more suitable for short-term storage modelling. Likewise, solar-dominated and wind-dominated systems differ in their methodological requirements. Furthermore, the interactions between energy sectors and the operational limits of the technologies for sector coupling should be correctly captured, as they significantly impact on the value of different technologies and their flexibility. Finally, we recommend testing several temporal and technical representations for each particular system in order to ensure the feasibility of the selected method for that purpose. The findings and recommendations inform energy system modellers about improvements that will facilitate higher quality planning results.
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