Hybrid Multiple-Active Bridge for Unequal Power Flow in Smart Transformers
| Autor: | Marco Liserre, Braz Cardoso, Nimrod Vazquez, Victor N. Ferreira |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Power capability
business.industry Computer science 05 social sciences Electrical engineering 020207 software engineering 02 engineering and technology Modular design Converters Active devices law.invention Power flow law 0202 electrical engineering electronic engineering information engineering 0501 psychology and cognitive sciences Transformer business Low voltage 050107 human factors Voltage |
| Zdroj: | 2019 IEEE Energy Conversion Congress and Exposition (ECCE). |
| DOI: | 10.1109/ecce.2019.8913049 |
| Popis: | The Multiple-Active Bridge (MAB) converter has been proposed as an alternative to reduce the number of cells in the dc-dc stage of Smart Transformers (ST). Due to the higher number of bridges coupled to the same multi-winding transformer, a lower number of cells are necessary to reach the medium and low voltage demands (MV/LV). The MAB-based dc-dc stage of STs has the same power capability in direct and reverse power flow, because its composition is purely based on bidirectional bridges. Nevertheless, the ST operates most of the time in direct power, and only partial reverse power is typically occurring. Thereby, its reverse power capability is not fully explored, resulting in unnecessary extra costs. As a solution, this work proposes the Hybrid Multiple-Active Bridge (H-MAB) as a basic cell of modular dc-dc converters for unequal power flow applications. The H-MAB, mixes uni and bidirectional bridges in the same multi-winding transformer, being capable of providing a balanced partial reverse power flow, with a reduced number of active devices. Applied as a basic cells of the dc-dc stage of STs, it can save costs, and keep a balanced power and voltage on its MV stage. Simulation and experimental results are presented, to validate the proposed topology, analyzing its functionality, efficiency and impact on STs. In addition, it is carried out a case-study, showing that the H-MAB can considerably reduce the cost of STs, exploring its unequal power flow operation. |
| Databáze: | OpenAIRE |
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