Simplified Indirect Model Predictive Control Method for a Modular Multilevel Converter
Demand for modular multilevel converters (MMCs) has been steadily increasing for utilization in medium- to high-power applications because of qualities such as high modularity, easy scalability, and superior harmonic performance. Furthermore, there has been a growing trend toward utilizing model pre...
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doaj-0f40aeb5fa6c4d59b20e0c629b64beaa2021-03-29T21:26:07ZengIEEEIEEE Access2169-35362018-01-016624056241810.1109/ACCESS.2018.28765058494725Simplified Indirect Model Predictive Control Method for a Modular Multilevel ConverterMinh Hoang Nguyen0Sangshin Kwak1https://orcid.org/0000-0002-2890-906XSchool of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South KoreaSchool of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South KoreaDemand for modular multilevel converters (MMCs) has been steadily increasing for utilization in medium- to high-power applications because of qualities such as high modularity, easy scalability, and superior harmonic performance. Furthermore, there has been a growing trend toward utilizing model predictive control for MMCs due to its simplicity, good dynamic response, and ease of multi-objective control. However, the rise in computational load leads to a great drawback when increasing the number of submodules (SMs). This paper presents an approach to reducing the computational load and using on-state SMs and circulating currents, by preselecting the number of SMs inserted in the upper and lower arms. This approach is based on using the number of on-state SMs and the circulating current, to compute the number of SMs inserted in the upper and lower arms, which is evaluated in the next sampling instant. This facilitates a significant reduction in the number of control options and the computational load. A sorting algorithm is used to retain the balancing capacitor voltages in each SM, while the cost function guarantees the regulation of the ac-side currents, arm voltages, and MMC circulating currents. Simulation and experiment results validate the performance of the proposed approach.https://ieeexplore.ieee.org/document/8494725/Model predictive control (MPC)modular multilevel converter (MMC)circulating currentcomputational loadpreselection |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Minh Hoang Nguyen Sangshin Kwak |
spellingShingle |
Minh Hoang Nguyen Sangshin Kwak Simplified Indirect Model Predictive Control Method for a Modular Multilevel Converter IEEE Access Model predictive control (MPC) modular multilevel converter (MMC) circulating current computational load preselection |
author_facet |
Minh Hoang Nguyen Sangshin Kwak |
author_sort |
Minh Hoang Nguyen |
title |
Simplified Indirect Model Predictive Control Method for a Modular Multilevel Converter |
title_short |
Simplified Indirect Model Predictive Control Method for a Modular Multilevel Converter |
title_full |
Simplified Indirect Model Predictive Control Method for a Modular Multilevel Converter |
title_fullStr |
Simplified Indirect Model Predictive Control Method for a Modular Multilevel Converter |
title_full_unstemmed |
Simplified Indirect Model Predictive Control Method for a Modular Multilevel Converter |
title_sort |
simplified indirect model predictive control method for a modular multilevel converter |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2018-01-01 |
description |
Demand for modular multilevel converters (MMCs) has been steadily increasing for utilization in medium- to high-power applications because of qualities such as high modularity, easy scalability, and superior harmonic performance. Furthermore, there has been a growing trend toward utilizing model predictive control for MMCs due to its simplicity, good dynamic response, and ease of multi-objective control. However, the rise in computational load leads to a great drawback when increasing the number of submodules (SMs). This paper presents an approach to reducing the computational load and using on-state SMs and circulating currents, by preselecting the number of SMs inserted in the upper and lower arms. This approach is based on using the number of on-state SMs and the circulating current, to compute the number of SMs inserted in the upper and lower arms, which is evaluated in the next sampling instant. This facilitates a significant reduction in the number of control options and the computational load. A sorting algorithm is used to retain the balancing capacitor voltages in each SM, while the cost function guarantees the regulation of the ac-side currents, arm voltages, and MMC circulating currents. Simulation and experiment results validate the performance of the proposed approach. |
topic |
Model predictive control (MPC) modular multilevel converter (MMC) circulating current computational load preselection |
url |
https://ieeexplore.ieee.org/document/8494725/ |
work_keys_str_mv |
AT minhhoangnguyen simplifiedindirectmodelpredictivecontrolmethodforamodularmultilevelconverter AT sangshinkwak simplifiedindirectmodelpredictivecontrolmethodforamodularmultilevelconverter |
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1724192941516259328 |