Feedback linearization-based current control strategy for modular multilevel converters
Modular multilevel converters (MMCs) are multi-input multi-output (MIMO) nonlinear systems. The control systems for MMCs are required to simultaneously achieve multiple control objectives, e.g., output current regulation, submodule capacitor voltage control, and circulating ripple currents suppressi...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/141589 |
| _version_ | 1811681885124820992 |
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| author | Yang, Shunfeng Wang, Peng Tang, Yi |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Yang, Shunfeng Wang, Peng Tang, Yi |
| author_sort | Yang, Shunfeng |
| collection | NTU |
| description | Modular multilevel converters (MMCs) are multi-input multi-output (MIMO) nonlinear systems. The control systems for MMCs are required to simultaneously achieve multiple control objectives, e.g., output current regulation, submodule capacitor voltage control, and circulating ripple currents suppression. Existing cascaded control strategies for MMCs achieve those control objectives with relatively complex controllers, and the controller parameter design is normally difficult for such nonlinear systems with highly coupled states. In view of this, a feedback linearization-based current control strategy is proposed for an MMC system in this paper. The nonlinear state function model of the MMC is presented and transformed to a linearized and decoupled form with the help of the input-output feedback linearization technique. Based on the linearized system, simple linear controllers are employed to regulate the output and inner differential currents of the MMC, which significantly reduces the difficulty in controller design. The stability of the proposed control strategy is analyzed. The experimental verification results show that, compared to the conventional cascaded control strategies for MMCs, the proposed feedback linearization control strategy is able to achieve improved steady-state and dynamic performances. The robustness of the proposed control strategy against parametric uncertainties is experimentally investigated. |
| first_indexed | 2024-10-01T03:48:03Z |
| format | Journal Article |
| id | ntu-10356/141589 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:48:03Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1415892020-06-09T06:27:45Z Feedback linearization-based current control strategy for modular multilevel converters Yang, Shunfeng Wang, Peng Tang, Yi School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Current Control Feedback Linearization Modular multilevel converters (MMCs) are multi-input multi-output (MIMO) nonlinear systems. The control systems for MMCs are required to simultaneously achieve multiple control objectives, e.g., output current regulation, submodule capacitor voltage control, and circulating ripple currents suppression. Existing cascaded control strategies for MMCs achieve those control objectives with relatively complex controllers, and the controller parameter design is normally difficult for such nonlinear systems with highly coupled states. In view of this, a feedback linearization-based current control strategy is proposed for an MMC system in this paper. The nonlinear state function model of the MMC is presented and transformed to a linearized and decoupled form with the help of the input-output feedback linearization technique. Based on the linearized system, simple linear controllers are employed to regulate the output and inner differential currents of the MMC, which significantly reduces the difficulty in controller design. The stability of the proposed control strategy is analyzed. The experimental verification results show that, compared to the conventional cascaded control strategies for MMCs, the proposed feedback linearization control strategy is able to achieve improved steady-state and dynamic performances. The robustness of the proposed control strategy against parametric uncertainties is experimentally investigated. NRF (Natl Research Foundation, S’pore) 2020-06-09T06:27:45Z 2020-06-09T06:27:45Z 2017 Journal Article Yang, S., Wang, P., & Tang, Y. (2018). Feedback linearization-based current control strategy for modular multilevel converters. IEEE Transactions on Power Electronics, 33(1), 161-174. doi:10.1109/TPEL.2017.2662062 0885-8993 https://hdl.handle.net/10356/141589 10.1109/TPEL.2017.2662062 2-s2.0-85032022776 1 33 161 174 en IEEE Transactions on Power Electronics © 2017 IEEE. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Current Control Feedback Linearization Yang, Shunfeng Wang, Peng Tang, Yi Feedback linearization-based current control strategy for modular multilevel converters |
| title | Feedback linearization-based current control strategy for modular multilevel converters |
| title_full | Feedback linearization-based current control strategy for modular multilevel converters |
| title_fullStr | Feedback linearization-based current control strategy for modular multilevel converters |
| title_full_unstemmed | Feedback linearization-based current control strategy for modular multilevel converters |
| title_short | Feedback linearization-based current control strategy for modular multilevel converters |
| title_sort | feedback linearization based current control strategy for modular multilevel converters |
| topic | Engineering::Electrical and electronic engineering Current Control Feedback Linearization |
| url | https://hdl.handle.net/10356/141589 |
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