IMPACT OF THE MODELLING DEPTH OF DISTRIBUTION GRIDS ON THE ACCURACY OF AGGREGATED DISTRIBUTION NETWORKS

Thomas L. Würl, Mariano Dominguez Librandi, Rolf Witzmann

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The representation of distribution networks within large transmission systems becomes increasingly relevant due to the growing share of distributed generation in lower voltage levels. Modelling detailed distribution networks for large-scale network simulations is infeasible due to the large amount of individual generation units, and thus, the amount of dynamic models. Equivalent dynamic models offer a solution to represent the impact of distribution networks as close as possible. This is achievable using grey-box models, which retain the overall dynamic models and take the grid impedance of the lower voltage levels into consideration without the computational burden. This paper focusses on the required modelling depth of the low voltage level in equivalent distribution networks. Three different approaches are presented and the deviation to a simplified approach and the detailed mode are compared. The deviation between the different modelling depths with equivalent impedances is shown to be marginal, whereas disregarding the distribution network impedance completely leads to large stationary and dynamic errors.

Original languageEnglish
Title of host publicationIET Conference Proceedings
PublisherInstitution of Engineering and Technology
Pages1879-1883
Number of pages5
Volume2021
Edition6
ISBN (Electronic)9781839534300, 9781839535048, 9781839535741, 9781839535918, 9781839536045, 9781839536052, 9781839536069, 9781839536199, 9781839536366, 9781839536588, 9781839536793, 9781839536809, 9781839536816, 9781839536847, 9781839537035
DOIs
StatePublished - 2021
Event26th International Conference and Exhibition on Electricity Distribution, CIRED 2021 - Virtual, Online
Duration: 20 Sep 202123 Sep 2021

Conference

Conference26th International Conference and Exhibition on Electricity Distribution, CIRED 2021
CityVirtual, Online
Period20/09/2123/09/21

Keywords

  • ACTIVE DISTRIBUTION NETWORK (ADN)
  • DISTRIBUTED GENERATION
  • EQUIVALENT DISTRIBUTION NETWORK
  • EQUIVALENT DYNAMIC MODEL
  • GREY-BOX MODEL

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