Modal Aggregation Technique to Check the Accuracy of the Model Reduction of Array Cable Systems in Offshore Wind Farms

Mohammad Kazem Bakhshizadeh*, Benjamin Vilmann, Łukasz Kocewiak

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The need for a verification method for aggregation techniques for passive electrical systems is necessary as power systems increase in complexity. Model reduction is crucial to increase the number of simulations necessary to ensure a stable and reliable design of power systems. This paper presents a novel modal domain-based technique to identify the best aggregation technique for a given system and to indicate the validity of the aggregation. This is done by benchmarking different aggregation techniques and using the dominant contribution factor ratio as a validity parameter. The different aggregation techniques are compared via time-domain simulations against the full detailed model. It is found that (1) the power loss aggregation technique is the most precise when it weighs the equivalent impedances of the parallel feeders, (2) unequal current generation does not impact the aggregation accuracy, (3) individual string aggregation provides the best results for dynamic simulations, and (4) the validity of aggregation decreases as frequency or cable length increases.
Original languageEnglish
Article number7996
JournalEnergies
Volume15
Issue number21
Number of pages19
ISSN1996-1073
DOIs
Publication statusPublished - 2022

Keywords

  • Modal
  • Eigenvalue-based
  • Model reduction
  • Aggregation
  • Offshore wind farm
  • Collector system

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