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Distributed Control Strategy Based on a Consensus Algorithm for the Inter-cell and Inter-cluster Voltage Balancing of a Cascaded H-Bridge Based STATCOM

Burgos-Mellado, Claudio; Gutierrez, Joseph; Pineda, Cristian; Donoso, Felipe; Watson, Alan; Sumner, Mark; Cardenas, Roberto; Mora, Andres

Distributed Control Strategy Based on a Consensus Algorithm for the Inter-cell and Inter-cluster Voltage Balancing of a Cascaded H-Bridge Based STATCOM Thumbnail


Authors

Claudio Burgos-Mellado

Joseph Gutierrez

Cristian Pineda

Felipe Donoso

Roberto Cardenas

Andres Mora



Abstract

© 2020 IEEE. Cascaded H-bridge converters are widely used in the implementation of medium voltage static synchronous compensators (STATCOMs). This is because of the advantages of relatively high-power density and the improved utilisation of low-voltage semiconductor devices. Major concerns with this topology are (i) to ensure a proper balance of the individual DC capacitor voltage in its cells, and (ii) the balancing of the average DC voltage between its clusters. In the research literature, these issues are typically addressed by using centralised control approaches, meaning that both an extensive processing capability and multiple digital outputs and communication channels for the switching signals are required, increasing system complexity. In contrast to this trend, in this paper, a distributed control scheme based on a consensus algorithm is proposed to deal with these issues in a three-phase STATCOM based on a cascaded H-bridge converter. The main advantages of the proposed control scheme are: (i) it does not require a centralised controller, since the cells work autonomously in a cooperative fashion to achieve voltage regulation, distributing the control effort among thecells, and (ii) it increases the fault tolerance of the converter and thus, the reliability of the system by adequately considering its redundancy. Extensive simulation work is provided to validate this proposal, and the characteristics described above.

Citation

Burgos-Mellado, C., Gutierrez, J., Pineda, C., Donoso, F., Watson, A., Sumner, M., Cardenas, R., & Mora, A. (2020, November). Distributed Control Strategy Based on a Consensus Algorithm for the Inter-cell and Inter-cluster Voltage Balancing of a Cascaded H-Bridge Based STATCOM. Presented at 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), Aalborg, Denmark

Presentation Conference Type Edited Proceedings
Conference Name 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
Start Date Nov 9, 2020
End Date Nov 12, 2020
Acceptance Date Oct 1, 2020
Online Publication Date Nov 30, 2020
Publication Date Nov 9, 2020
Deposit Date Jan 18, 2021
Publicly Available Date Jan 18, 2021
Pages 1-8
Series ISSN 1093-5142
Book Title 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020
DOI https://doi.org/10.1109/COMPEL49091.2020.9265758
Public URL https://nottingham-repository.worktribe.com/output/5207346
Publisher URL https://ieeexplore.ieee.org/document/9265758
Additional Information © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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