EPE Association: EPE 2023 - LS1c: Solid State Transformers

EPE 2023 - LS1c: Solid State Transformers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 02: Power Converter Topologies and Design > EPE 2023 - LS1c: Solid State Transformers

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   A Multi-level Pseudo Single Active Bridge (PSAB) DC-DC Converter for Offshore DC Wind Turbines
By Babak KHANZADEH, Torbjörn THIRINGER [View]
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Abstract: The three-phase single active bridge (SAB) converter suffers from large second harmonic currents in the ac-link, low transformer utilization, and large required dc-link capacitors. This has led to a focus on the dual active bridge (DAB) converters in the literature, even for unidirectional applications like dc wind turbines. In these applications, the load-side transistors of the DAB converter transfer power for a small fraction of the fundamental period. This means investment in chips that are not used to the maximum of their potential. This paper proposes a hybrid of the SAB and DAB converters to solve this issue. The proposed converter can be controlled by phase shift modulation and performs similarly to a DAB converter. It is shown that this converter's total installed transistor apparent power is 40\% and 45\% less than that of the conventional dual active bridge (DAB) and multi-level DAB converters, respectively.

   Bidirectional hybrid insolated DC transformer for Interconnection of MVDC and HVDC Systems
By Xiaodong ZHAO, Binbin LI, Guihong ZHANG, Xiangcheng ZHANG, Shibin WANG, Dianguo XU [View]
[Download]

Abstract: A bidirectional hybrid isolated DC transformer (B-HIT) is proposed for interconnection of MVDC and HVDC systems. Compared with the existing topologies, the proposed B-HIT reduces the device count, cost, loss, and SM capacitance. The operation principle is introduced, and the effectiveness has been confirmed by simulation results and experimental results.

   Isolated and Bidirectional Three-phase Single-Stage Quad-Active-Bridge Series-Resonant AC-DC converter
By Daniel CHAVEZ, Damian SAL Y ROSAS, Gustavo NAVARRO, Marcos LAFOZ [View]
[Download]

Abstract: A novel isolated and bidirectional single-stage three-phase AC-DC converter called QuadActive-Bridge Series-Resonant (QABSR) ACDC converter is proposed. Unipolar voltages switches are used to modulate the grid voltages. The proposed modulation allows to obtain minimum HF current and a decoupled gridcurrent control. Converter design, simulation and experimental results are presented.

EPE 2023 - LS1c: Solid State Transformers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 02: Power Converter Topologies and Design > EPE 2023 - LS1c: Solid State Transformers
	[return to parent folder]

	A Multi-level Pseudo Single Active Bridge (PSAB) DC-DC Converter for Offshore DC Wind Turbines By Babak KHANZADEH, Torbjörn THIRINGER	[View] [Download]
Abstract: The three-phase single active bridge (SAB) converter suffers from large second harmonic currents in the ac-link, low transformer utilization, and large required dc-link capacitors. This has led to a focus on the dual active bridge (DAB) converters in the literature, even for unidirectional applications like dc wind turbines. In these applications, the load-side transistors of the DAB converter transfer power for a small fraction of the fundamental period. This means investment in chips that are not used to the maximum of their potential. This paper proposes a hybrid of the SAB and DAB converters to solve this issue. The proposed converter can be controlled by phase shift modulation and performs similarly to a DAB converter. It is shown that this converter's total installed transistor apparent power is 40\% and 45\% less than that of the conventional dual active bridge (DAB) and multi-level DAB converters, respectively.

	Bidirectional hybrid insolated DC transformer for Interconnection of MVDC and HVDC Systems By Xiaodong ZHAO, Binbin LI, Guihong ZHANG, Xiangcheng ZHANG, Shibin WANG, Dianguo XU	[View] [Download]
Abstract: A bidirectional hybrid isolated DC transformer (B-HIT) is proposed for interconnection of MVDC and HVDC systems. Compared with the existing topologies, the proposed B-HIT reduces the device count, cost, loss, and SM capacitance. The operation principle is introduced, and the effectiveness has been confirmed by simulation results and experimental results.

	Isolated and Bidirectional Three-phase Single-Stage Quad-Active-Bridge Series-Resonant AC-DC converter By Daniel CHAVEZ, Damian SAL Y ROSAS, Gustavo NAVARRO, Marcos LAFOZ	[View] [Download]
Abstract: A novel isolated and bidirectional single-stage three-phase AC-DC converter called QuadActive-Bridge Series-Resonant (QABSR) ACDC converter is proposed. Unipolar voltages switches are used to modulate the grid voltages. The proposed modulation allows to obtain minimum HF current and a decoupled gridcurrent control. Converter design, simulation and experimental results are presented.