Interactions between indirect DC-voltage estimation and circulating current controllers of MMC-based HVDC transmission systems

Interactions between indirect DC-voltage estimation and circulating current controllers of MMC-based HVDC transmission systems

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 estimati...

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Bibliographic Details
Main Authors: Wickramasinghe, Harith R., Konstantinou, Georgios, Pou, Josep, Agelidis, Vassilios G.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2020
Subjects:
Engineering::Electrical and electronic engineering
DC-voltage Estimation
DC-voltage Control
Online Access:https://hdl.handle.net/10356/141521
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Institution: Nanyang Technological University
Language: English
Description
Summary: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.

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