A Voltage Sensitivity Based Equivalent for Active Distribution Networks Containing Grid Forming Converters

Ungerland, Jakob; Poshiya, Nikhilkumar; Biener, Wolfgang; Lens, Hendrik

doi:10.1109/tsg.2022.3221874

Cited by 10 publications

(18 citation statements)

References 38 publications

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“…As introduced in refs. [7,9] and based on the classification by previous studies, [10][11][12][13] methods to create EDAM can be categorized in methods for networks with conventional generation only, i.e., coherency and modal-based approaches, [14,15] and for networks with both conventional generation and CBG. The latter is relevant for stability studies of future power systems dominated by CBG.…”

Section: Classificationmentioning

confidence: 99%

“…The STCA is introduced and validated in ref. [7] on an ADN with open ring network topology and six GFMC in different branches of the network. The corresponding EDAM comprise six equivalent GFMC connected in parallel.…”

Section: Contribution and Paper Organizationmentioning

confidence: 99%

“…However, ref. [7] does not analyze the aggregation of multiple GFMC to one equivalent GFMC. Also, the STCA is not applied on a closed ring network topology.…”

Section: Contribution and Paper Organizationmentioning

confidence: 99%

“…This need has been addressed in previous work. [7] There, the so-called Sensitivity-Technology-Control-Clustered Approach (STCA) has been introduced, which yields EDAM that can reproduce the dynamic behavior of GFMC adequately. In this article, an EDAM aggregated by STCA is referred to as a STCA-EDAM.While ref.[7] is, to the knowledge of the authors, the first clustering-based algorithm that incorporates GFMC, the analysis…”

mentioning

confidence: 99%

“…Also, the application of STCA in ref. [7] is limited to an open ring network topology. However, around 15% of the medium voltage networks in Germany are operated as closed ring topologies.…”

mentioning

confidence: 99%

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Evaluation of Equivalent Dynamic Active Distribution Network Models with Individual and Aggregated Consideration of Grid Forming Converters

Ungerland

Lens

2023

Energy Tech

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Detailed active distribution network modeling in the context of stability studies of future power systems can be avoided by applying complexity‐reduced equivalent dynamic models. Previous work developed an approach to derive such equivalent dynamic network models of systems dominated by grid following and grid forming converters. Nevertheless, this approach lacks an investigation of the aggregation of multiple grid forming converters to one equivalent component. Also, the approach needs to be evaluated for a closed ring topology to substantiate its validity independent of the detailed network topology. This work applies and validates the developed approach on active distribution networks in the context of three scenarios. The detailed and equivalent network models are simulated for three events and the results are used to compare the models with respect to accuracy and complexity. The derived equivalent dynamic network models with an individual representation of grid forming converters reproduce the dynamic behavior of the corresponding detailed networks very well. The aggregation of grid forming converters results in an adequate reproduction of the detailed network's dynamic behavior under the constraint of aggregating only neighboring grid forming converters of one branch. This allows for the consideration of the detailed network's topology in the corresponding equivalent dynamic model.

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Section: Classificationmentioning

confidence: 99%

Section: Contribution and Paper Organizationmentioning

confidence: 99%

“…However, ref. [7] does not analyze the aggregation of multiple GFMC to one equivalent GFMC. Also, the STCA is not applied on a closed ring network topology.…”

Section: Contribution and Paper Organizationmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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