Detailed Equivalent and Average Value Models of Hybrid Cascaded Multilevel Converters for Efficient and Accurate EMT-Type Simulation. Han, J., Bieber, L., Zhang, Y., Wang, L., Li, W., & Belanger, J. IEEE Transactions on Power Delivery, 35(6):2951-2962, Dec, 2020. doi abstract bibtex The emerging voltage source converters (VSCs) such as hybrid cascaded multilevel converters (HCMCs) are promising converter technologies which enable higher converter efficiency, compactness, and DC fault resilience for high voltage direct current (HVDC) transmission. However, the large number of switching events due to the converters' submodules introduces a heavy computational burden for electromagnetic transient (EMT) simulations. Efficient and accurate EMT-type converter models play a vital role in the control and design of HVDC converters. Several computationally efficient models for the HCMCs are proposed in this paper, including the detailed equivalent model (DEM) and several average value models (AVMs) of varying accuracy. Additionally, a combined model is proposed which allows the users to switch among the DEM and AVMs during dynamic simulations. The proposed models are validated against the DEM for dynamic transients. The simulation results demonstrate good modeling accuracy of the proposed models. The AVMs are also shown to significantly improve simulation efficiency compared to the DEM, which is very desirable especially for HCMCs with a large number of submodules.
@ARTICLE{9117041,
author={Han, Jintao and Bieber, Levi and Zhang, Yuanshi and Wang, Liwei and Li, Wei and Belanger, Jean},
journal={IEEE Transactions on Power Delivery},
title={Detailed Equivalent and Average Value Models of Hybrid Cascaded Multilevel Converters for Efficient and Accurate EMT-Type Simulation},
year={2020},
volume={35},
number={6},
pages={2951-2962},
abstract={The emerging voltage source converters (VSCs) such as hybrid cascaded multilevel converters (HCMCs) are promising converter technologies which enable higher converter efficiency, compactness, and DC fault resilience for high voltage direct current (HVDC) transmission. However, the large number of switching events due to the converters' submodules introduces a heavy computational burden for electromagnetic transient (EMT) simulations. Efficient and accurate EMT-type converter models play a vital role in the control and design of HVDC converters. Several computationally efficient models for the HCMCs are proposed in this paper, including the detailed equivalent model (DEM) and several average value models (AVMs) of varying accuracy. Additionally, a combined model is proposed which allows the users to switch among the DEM and AVMs during dynamic simulations. The proposed models are validated against the DEM for dynamic transients. The simulation results demonstrate good modeling accuracy of the proposed models. The AVMs are also shown to significantly improve simulation efficiency compared to the DEM, which is very desirable especially for HCMCs with a large number of submodules.},
keywords={Integrated circuit modeling;Switches;Numerical models;Computational modeling;Harmonic analysis;Capacitors;Voltage control;Average value model;detailed equivalent model;electromagnetic transient simulation;high voltage direct current system;hybrid cascaded multilevel converter},
doi={10.1109/TPWRD.2020.3002237},
ISSN={1937-4208},
month={Dec},}
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However, the large number of switching events due to the converters' submodules introduces a heavy computational burden for electromagnetic transient (EMT) simulations. Efficient and accurate EMT-type converter models play a vital role in the control and design of HVDC converters. Several computationally efficient models for the HCMCs are proposed in this paper, including the detailed equivalent model (DEM) and several average value models (AVMs) of varying accuracy. Additionally, a combined model is proposed which allows the users to switch among the DEM and AVMs during dynamic simulations. The proposed models are validated against the DEM for dynamic transients. The simulation results demonstrate good modeling accuracy of the proposed models. The AVMs are also shown to significantly improve simulation efficiency compared to the DEM, which is very desirable especially for HCMCs with a large number of submodules.","keywords":"Integrated circuit modeling;Switches;Numerical models;Computational modeling;Harmonic analysis;Capacitors;Voltage control;Average value model;detailed equivalent model;electromagnetic transient simulation;high voltage direct current system;hybrid cascaded multilevel converter","doi":"10.1109/TPWRD.2020.3002237","issn":"1937-4208","month":"Dec","bibtex":"@ARTICLE{9117041,\n author={Han, Jintao and Bieber, Levi and Zhang, Yuanshi and Wang, Liwei and Li, Wei and Belanger, Jean},\n journal={IEEE Transactions on Power Delivery}, \n title={Detailed Equivalent and Average Value Models of Hybrid Cascaded Multilevel Converters for Efficient and Accurate EMT-Type Simulation}, \n year={2020},\n volume={35},\n number={6},\n pages={2951-2962},\n abstract={The emerging voltage source converters (VSCs) such as hybrid cascaded multilevel converters (HCMCs) are promising converter technologies which enable higher converter efficiency, compactness, and DC fault resilience for high voltage direct current (HVDC) transmission. However, the large number of switching events due to the converters' submodules introduces a heavy computational burden for electromagnetic transient (EMT) simulations. Efficient and accurate EMT-type converter models play a vital role in the control and design of HVDC converters. Several computationally efficient models for the HCMCs are proposed in this paper, including the detailed equivalent model (DEM) and several average value models (AVMs) of varying accuracy. Additionally, a combined model is proposed which allows the users to switch among the DEM and AVMs during dynamic simulations. The proposed models are validated against the DEM for dynamic transients. The simulation results demonstrate good modeling accuracy of the proposed models. 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