Multi-Level Power Converter Using Series-Connected Solid-State Transformers

2018 ◽  
Author(s):  
Yuichi Mabuchi ◽  
Yuki Kawaguchi ◽  
Kimihisa Furukawa ◽  
Mitsuhiro Kadota ◽  
Mizuki Nakahara ◽  
...  
Keyword(s):  
Solid State ◽  
Power Converter ◽  
Solid State Transformers ◽  
Multi Level

scholarly journals Solid-State Transformers in Locomotives Fed through AC Lines: A Review and Future Developments

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4711 ◽  
Author(s):  
Stefano Farnesi ◽  
Mario Marchesoni ◽  
Massimiliano Passalacqua ◽  
Luis Vaccaro
Keyword(s):  
Solid State ◽  
High Power ◽  
Electrical Equipment ◽  
Input Voltage ◽  
Power Converter ◽  
Point Of View ◽  
Power Electronic ◽  
Medium Frequency ◽  
Technical Literature ◽  
Solid State Transformers

One of the most important innovation expectation in railway electrical equipment is the replacement of the on-board transformer with a high power converter. Since the transformer operates at line-frequency (i.e., 50 Hz or 16 2/3 Hz), it represents a critical component from weight point of view and, moreover, it is characterized by quite poor efficiency. High power converters for this application are characterized by a medium frequency inductive coupling and are commonly referred as Power Electronic Transformers (PET), Medium Frequency Topologies or Solid-State Transformers (SST). Many studies were carried out and various prototypes were realized until now, however, the realization of such a system has some difficulties, mainly related to the high input voltage (i.e., 25 kV for 50 Hz lines and 15 kV for 16 2/3 Hz lines) and the limited performance of available power electronic switches. The aim of this study is to present a survey on the main solutions proposed in the technical literature and, analyzing pros and cons of these studies, to introduce new possible circuit topologies for this application.

Modeling of cross-circulating currents in a MMC with parallel connected submodules in Solid State Transformers

2021 ◽  
Author(s):  
Felipe Ruiz Allende ◽  
Marcelo A. Perez ◽  
Freddy Flores-Bahamonde ◽  
Mariusz Malinowski
Keyword(s):  
Solid State ◽  
Solid State Transformers ◽  
Circulating Currents

Active Thermal Control for Cascaded H-Bridges in Solid State Transformers

2021 ◽  
Author(s):  
Jianxiong Yu ◽  
Jiatong Zhang ◽  
Rui Lu ◽  
Rongxiang Zhao ◽  
Chushan Li ◽  
...  
Keyword(s):  
Solid State ◽  
Thermal Control ◽  
Solid State Transformers

Control of cross-circulating currents in a MMC with parallel connected arms in Solid State Transformers

2021 ◽  
Author(s):  
Felipe L. Ruiz ◽  
Marcelo A. Perez ◽  
Freddy Flores-Bahamonde ◽  
Mariusz Malinowski
Keyword(s):  
Solid State ◽  
Solid State Transformers ◽  
Circulating Currents

scholarly journals A Bidirectional Double Uneven Power Converter Based DC–DC Converter for Solid-State Transformers

Electronics ◽  
2018 ◽  
Vol 7 (11) ◽  
pp. 334 ◽  
Author(s):  
Kiwoo Park ◽  
Kyo-Beum Lee
Keyword(s):  
Solid State ◽  
Distribution System ◽  
Power Flow ◽  
Power Converter ◽  
Small Scale ◽  
Power Semiconductor ◽  
Switching Losses ◽  
Zero Current Switching ◽  
Zero Current ◽  
Bidirectional Power Flow

This paper presents a novel bidirectional double uneven power (BiDUP) based dc-dc converter and its design and control methods. The proposed converter utilizes two dual active bridge (DAB) converters with different power ratings in a special way to realize zero current switching (ZCS), where both turn-on and turn-off switchings occur under the zero-current condition. A design example of the proposed BiDUP converter is presented for medium voltage (MV) and high-power solid-state transformer (SST) systems where both voltage transformation and bidirectional power flow are required. The main features of the proposed converter are to reduce both the switching losses in power semiconductor devices and the filter inductance requirement simultaneously. To verify the feasibility of the proposed converter, a simulation study on the BiDUP converter based SST in a distribution system is presented. Furthermore, to validate the operational principle of the proposed converter, an experimental study using a small-scale prototype is also presented.

scholarly journals Application of Solid-State Transformers in a Novel Architecture of Hybrid AC/DC House Power Systems

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3432 ◽  
Author(s):  
Fabio Bignucolo ◽  
Manuele Bertoluzzo
Keyword(s):  
Solid State ◽  
Power Systems ◽  
Distribution Networks ◽  
Heat Pumps ◽  
Operating Conditions ◽  
Dynamic Simulations ◽  
Load Variations ◽  
Solid State Transformers ◽  
Local Resources ◽  
Induction Cooking

The ongoing diffusion of solid-state DC/DC converters makes possible a partial migration of electric power systems from the present AC paradigm to a future DC scenario. In addition, the power demand in the domestic environment is expected to grow considerably, for example, due to the progressive diffusion of electric vehicles, induction cooking and heat pumps. To face this evolution, the paper introduces a novel electric topology for a hybrid AC/DC smart house, based on the solid-state transformer technology. The electric scheme, voltage levels and converters types are thoroughly discussed to better integrate the spread of electric appliances, which are frequently based on internal DC buses, within the present AC distribution networks. Voltage levels are determined to guarantee high safety zones with negligible electric risk in the most exposed areas of the house. At the same time, the developed control schemes assure high power quality (voltage stability in the case of both load variations and network perturbations), manage power flows and local resources according to ancillary services requirements and increase the domestic network overall efficiency. Dynamic simulations are performed, making use of DIgSILENT PowerFactory software, to demonstrate the feasibility of the proposed distribution scheme for next-generation smart houses under different operating conditions.

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