Enhanced Equivalent Model of MMC-Based Power Electronic Transformer

Gao, Chenxiang; Feng, Moke; Ding, Jiangping; Xu, Jianzhong; Zhao, Chengyong

doi:10.1109/hvdc50696.2020.9292711

2020 4th International Conference on HVDC (HVDC) 2020

DOI: 10.1109/hvdc50696.2020.9292711

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Enhanced Equivalent Model of MMC-Based Power Electronic Transformer

Chenxiang Gao

Moke Feng

Jiangping Ding

et al.

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2022

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“…A portion of this method has been presented in [26], which is significantly improved in this paper. In addition, the equivalent modelling method of the blocking mode can be effectively solved by calling the sub-function of the diode model from the EMT solver [24], which is out of the scope of this paper.…”

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confidence: 99%

Accelerated Electromagnetic Transient (EMT) Equivalent Model of Solid-State Transformer

Gao

Feng

Ding

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

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Accurate and efficient electromagnetic transient (EMT) simulation of various types of solid-state transformers (SST) is extremely time-consuming due to the complex module structure, flexible topology connections, large number of electrical nodes and simulation time-steps limited in the range of micro-seconds. Therefore, it is urgent to develop the EMT equivalent modelling and fast simulation of SSTs for system level studies. Taking the modular multilevel converter (MMC) based SST as an example, this paper proposes an accelerated EMT model which focuses on the equivalence of the dual active bridge (DAB) based high-frequency link (HFL) in the SST. Compared with the existing algorithms, two critical factors of the proposed method that contribute the most to the efficiency improvement are the preprocessing of the nodal admittance equation and the conversion of the short-circuit admittance parameters. The proposed model is verified in PSCAD/EMTDC by comparing it with the detailed EMT model. The results show that the accelerated model is one to two orders of magnitude faster than the detailed model without sacrificing the accuracy. The experiment validation also confirms the validity of the proposed model.

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mentioning

confidence: 99%

Accelerated Electromagnetic Transient (EMT) Equivalent Model of Solid-State Transformer

Gao

Feng

Ding

et al. 2022

IEEE J. Emerg. Sel. Topics Power Electron.

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Enhanced Equivalent Model of MMC-Based Power Electronic Transformer

Cited by 1 publication

References 22 publications

Accelerated Electromagnetic Transient (EMT) Equivalent Model of Solid-State Transformer

Accelerated Electromagnetic Transient (EMT) Equivalent Model of Solid-State Transformer

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