Highly Efficient and Reliable SiC-Based DC–DC Converter for Smart Transformer

Costa, Levy Ferreira; Buticchi, Giampaolo; Liserre, Marco

doi:10.1109/tie.2017.2696481

Cited by 60 publications

(19 citation statements)

References 29 publications

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“…SRC is configured either in half-bridge or full-bridge whereby the difference for both bridges is explained in [80]. Besides, SRC operates in discontinuous conduction mode (DCM) to reach the most efficient operating point [81] by achieving ZVS, zero-current switching (ZCS) and low current switching. However, the major challenge of using SRC is the lack of capability to control the power flow.…”

Section: ) Medium Frequency Convertermentioning

confidence: 99%

“…However, the major challenge of using SRC is the lack of capability to control the power flow. According to [81], the input voltage can be controlled through the first stage of SST once the system has enough degrees of freedom. It leads to the open-loop operation which makes the system simpler and inexpensive because of the number of sensors can be reduced [81].…”

Section: ) Medium Frequency Convertermentioning

confidence: 99%

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State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

et al. 2020

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Solid-state transformer (SST) is an emerging technology integrating with a transformer power electronics converters and control circuitry. This paper comprehensively reviews the SST topologies suitable for different voltage levels and with varied stages, their control operation, and different trends in applications. The paper discusses various SST configurations with their design and characteristics to convert the input to output under unipolar and bipolar operation. A comparison between the topologies, control operation and applications are included. Different control models and schemes are explained. Potential benefits of SST in many applications in terms of controllability and the synergy of AC and DC systems are highlighted to appreciate the importance of SST technologies. This review highlights many factors including existing issues and challenges and provides recommendations for the improvement of future SST configuration and development.

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Section: ) Medium Frequency Convertermentioning

confidence: 99%

Section: ) Medium Frequency Convertermentioning

confidence: 99%

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

et al. 2020

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“…In this equation, L eq is the equivalent inductance seen by the LV side, and it can be calculated in terms of the LV inductance and MV inductance by equation (6). Assuming a nominal power, nominal phase-shift angle and voltage, the required equivalent inductance can be calculated then by (7).…”

Section: Operation Principle Of the Mab Convertermentioning

confidence: 99%

Optimum Design of a Multiple-Active-Bridge DC–DC Converter for Smart Transformer

Costa

Buticchi

Liserre

2018

IEEE Trans. Power Electron.

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Abstract-The modular Smart Transformer (ST) is composed by several basic converters rated for lower voltage and power. In this paper the quadruple active bridge (QAB) is used as the basic block for the modular ST. In this application, the efficiency and cost are the most important design parameters. Therefore, the paper focus on the design of the converter, with the aim to optimize its efficiency, taking the cost into consideration. To do so, the losses of all components are carefully modeled and a computer-aided design is used, where an algorithm to calculate the losses and cost is developed, allowing to perform multi-objective optimization. Additionally, Silicon IGBTs and Silicon Carbide MOSFETs are considered for the design and the performance of the converter using both semiconductors technology is compared. Experimental results obtained for the optimized 20 kW QAB converter has shown an efficiency of 97.5%.

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“…This IGBT is recommended to application up to 10 kHz and it very suitable in this application. The QAB converter, on the other hand, has a switching frequency of 20 kHz, which provides a good trade-off between magnetic elements volume and isolation issues due to the partial discharge, as discussed [17]. The SiC-MOSFETs from Wolfspeed/CREE were employed in both sides of the converter.…”

Section: A Power Convertersmentioning

confidence: 99%

Smart transformer universal operation

Chub

Costa

et al. 2018

2018 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-The Smart Transformer (ST) has been proposed for increasing the hosting capacity of renewable energy sources in the power system with advanced control and communication capability. Its capability to connect-and disconnect itself from the main grid and to provide power from the Low Voltage (LV) grid to the Medium Voltage (MV) grid in the grid forming mode are an opportunity to realize an islanded operation mode. This operation mode requires a suitable controller design, which is forming the MV grid and the LV grid at the same time. This work proposes a modular ST architecture consisting of a three phase Cascaded HBridge (CHB) converter connected to Quadruple Active Bridge (QAB) converters. The design of the converter and its magnetic components is examined as well as the controller design for the QAB for the capability to address different operation modes. Grid forming operation on the both AC grid sides and the resulting constraints by means of active power availability are examined as well as opportunities to influence the power consumption of the grids. An experimental setup is presented and selected operation modes are demonstrated.

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Highly Efficient and Reliable SiC-Based DC–DC Converter for Smart Transformer

Cited by 60 publications

References 29 publications

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

Optimum Design of a Multiple-Active-Bridge DC–DC Converter for Smart Transformer

Smart transformer universal operation

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