Interactions Between Indirect DC-Voltage Estimation and Circulating Current Controllers of MMC-Based HVDC Transmission Systems

Harith R. Wickramasinghe*, Georgios Konstantinou, Josep Pou, Vassilios Agelidis

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Estimation-based indirect dc-voltage control in MMCs interacts with circulating current control methods. This paper proposes an estimation-based indirect dc-voltage control method for MMC-HVDC systems and analyzes its performance compared to alternative estimations. The interactions between estimation-based indirect dc-voltage control and circulating current control methods, active/reactive power regulation are also investigated. The proposed method delivers similar performance to measurement-based direct dc-voltage control, regardless of the circulating current control method. Steady-state and transient performance is demonstrated using a benchmark MMC-HVDC transmission system, implemented in a real-time digital simulator. The results verify the theoretical evaluations and illustrate the operation and performance of the proposed indirect dc-voltage control method.
Original languageEnglish
JournalI E E E Transactions on Power Systems
Volume33
Issue number1
Pages (from-to)829-838
Number of pages10
ISSN0885-8950
DOIs
Publication statusPublished - 2018

Keywords

  • Dc-voltage estimation
  • Dc-voltage control
  • High voltage direct current
  • Modular multilevel converter
  • Real-time digital simulator

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