To main content

Demand flexibility modelling for long term optimal distribution grid planning

Abstract

Optimisation tools for long-term grid planning considering flexibility resources require aggregated flexibility models that are not too computationally demanding or complex. Still, they should capture the operational benefits of flexibility sufficiently accurately for planning purposes. This article investigates the sufficiency of an aggregated flexibility model for planning tools by comparing it against a detailed flexibility model. Two different constraint formulations, namely based on recovery period and temporal proximity, were tested to account for post activation dynamics of flexibility resources. The results show that the recovery period based formulation results in excessive demand reduction. The proximity constraint formulation on the other hand results in realistic activation of flexibility resources, which represents an improvement over the base formulation without constraints for post activation dynamics. The results show how a too simple model of the operational behaviour of demand flexibility may overestimate its benefits as an alternative or supplement to grid investments.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 257626
  • EC/H2020 / 863819

Language

English

Affiliation

  • SINTEF Energy Research / Energisystemer
  • Belgium
  • University of Leuven
  • Italy

Year

2022

Published in

IET Generation, Transmission & Distribution

ISSN

1751-8687

Volume

16

Issue

24

Page(s)

5002 - 5014

View this publication at Cristin