Evolution in Solid-State Transformer and Power Electronic Transformer for Distribution and Traction System

Sharma, Shivam; Chaudhary, Ruhul Amin; Singh, Kamalpreet

doi:10.1007/978-981-13-5802-9_115

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…As the MMC converter's sub modules (SM) are coupled in series, the number of SMs may be changed to meet the system's voltage and capacity needs without changing the topology. The MMC converter's reactive power output may be adjusted to support the upper grid and allow the MMC input stage to operate at a power factor of 1 or a predefined power factor [7] . The DC/DC isolation stage uses N dual active bridge (DAB) converters with isolation function coupled in series on the input and parallel on the output.…”

Section: Mmc-sst Topologymentioning

confidence: 99%

Study of AC-DC hybrid microgrid control strategy considering electric vehicle switching stations

Zhongyu,

Liu

2023

Second International Conference on Energy, Power, and Electrical Technology (ICEPET 2023)

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The increasing popularity of new energy electric vehicles (NEVs) and fast charging has brought challenges to microgrids and negatively impacted the stability of power grids. This paper studies the design and control strategies of an electric vehicle charging station in a mixed AC/DC microgrid using a modular multilevel converter (MMC) based solid-state transformer. A control strategy was designed using virtual synchronous technology, which improved the efficiency of the charging station and reduced stability risks. The control strategy was tested on a simulation platform and found to be feasible. This research provides valuable reference for the development and application of electric vehicle charging stations in a mixed AC/DC microgrid architecture.

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Section: Mmc-sst Topologymentioning

confidence: 99%

Study of AC-DC hybrid microgrid control strategy considering electric vehicle switching stations

Zhongyu,

Liu

2023

Second International Conference on Energy, Power, and Electrical Technology (ICEPET 2023)

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A Novel Decoupled EMT Approach and Parallel Simulation Framework for Modularized Solid-State Transformers

Feng

Gao

et al. 2023

IEEE Trans. Power Delivery

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Electromagnetic transient (EMT) modeling for the modularized solid-state transformer (MSST) faces critical difficulties because the dynamics of the complex-structured submodules, which contain dual active bridges (DAB) and multiple active bridges (MAB), are hard to be described in analytical formulas. Existing models have problems of a narrow dynamic frequency band, insufficient simulation accuracy, or are unable to operate under fast transients. This paper proposes a parallel simulation framework for MSST that preserves the original model's broadband characteristics and remarkably improves the simulation efficiency. The main novelty towards previous work is the detailed modeling of the multi-winding transformer, the decoupled modeling of the submodules, and the parallel design of simulation processes. Finally, the proposed framework is verified through the accuracy and efficiency analysis carried out in PSCAD/EMTDC. The simulation results verify that the proposed framework has excellent accuracy and time efficiency. Index Terms-Electromagnetic transient modeling, modularized solid-state transformer (MSST), multiple active bridge (MAB), decoupled modeling, parallel simulation framework I. INTRODUCTION OLID-state transformer (SST), also called as power electronic transformer (PET), can interconnect systems with different voltage levels and achieve multi-directional power flow control [1]-[4]. Due to the modular design, the modularized SST (MSST) can be used in high voltage and high power applications [5], [6]. MSST would be effective equipment to link the transmission system and distribution network [7]-[9]. The multiple active bridge (MAB)-based MSST has higher power density, less transformers and submodules, and higher flexibility than the dual active bridge (DAB)-based MSST. Intensive studies of the topology and control sheme of MABbased MSST have been made in recent years [10]. Fig. 1(a) illustrates a cascaded H-bridge MAB MSST (CHB-MAB-MSST) whose technology readiness has been validated by the This work is supported by Beijing Natural Science Foundation under grant 3222059.

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Evolution in Solid-State Transformer and Power Electronic Transformer for Distribution and Traction System

Cited by 2 publications

References 27 publications

Study of AC-DC hybrid microgrid control strategy considering electric vehicle switching stations

Study of AC-DC hybrid microgrid control strategy considering electric vehicle switching stations

A Novel Decoupled EMT Approach and Parallel Simulation Framework for Modularized Solid-State Transformers

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