High-Frequency Transformer Isolated Bidirectional DC–DC Converter Modules With High Efficiency Over Wide Load Range for 20 kVA Solid-State Transformer

Fan, Haifeng; Li, Hui

doi:10.1109/tpel.2011.2160652

Cited by 330 publications

(106 citation statements)

References 27 publications

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“…The DHBs themselves are controlled using a phase shift strategy. Therefore, each converter can be modeled through the algebraic equation for their average power transfer [11]:…”

Section: Dual Half Bridge (Dhb)mentioning

confidence: 99%

Control of a three-stage medium voltage solid-state transformer

Busada¹,

Chiacchiarini²,

Jorge³

et al. 2017

Adv. sci. technol. eng. syst. j.

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“…The DHBs themselves are controlled using a phase shift strategy. Therefore, each converter can be modeled through the algebraic equation for their average power transfer [11]:…”

Section: Dual Half Bridge (Dhb)mentioning

confidence: 99%

Control of a three-stage medium voltage solid-state transformer

Busada¹,

Chiacchiarini²,

Jorge³

et al. 2017

Adv. sci. technol. eng. syst. j.

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“…1) fully decouples the front-end AC/DC stage and the isolated DC/DC stage, while providing the possibility for future MVDC distribution. Voltage conversion and galvanic isolation are realized by the DC/DC stage, which is the main challenge in a PET converter to achieve high efficiency and high power density of the whole converter [16].…”

Section: Introductionmentioning

confidence: 99%

“…Another way to sustain medium voltage is adopting multilevel topologies with low voltage rating power devices. The input-series-output-parallel structure is one of the most popular topologies [15], [16], [20]- [23]. The inputs of low voltage power cells are connected in series to sustain the medium DC voltage.…”

Section: Introductionmentioning

confidence: 99%

An Isolated Bidirectional Modular Multilevel DC/DC Converter for Power Electronic Transformer Applications

Wang¹,

Zhang²,

Sheng³

2016

Journal of Power Electronics

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With high penetration of renewable energies, power electronic transformers (PETs) will be one of the most important infrastructures in the future power delivery and management system. In this study, an isolated bidirectional modular multilevel DC/DC converter is proposed for PET applications. A modular multilevel structure is adopted as switching valves to sustain medium voltages to achieve modular design and high reliability. Only one high-frequency transformer is used in the proposed converter, which significantly simplifies the circuit and galvanic insulation design. A dual-phase-shift modulation strategy is proposed to regulate the output power and achieve a simple voltage balancing control. A down-scaled (2 kW/20 kHz) prototype is constructed to demonstrate the proposed converter and verify the control strategy. The experimental results comply with the theoretical analysis well, with the highest power efficiency reaching 97.6%.

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“…There are several key aspects to be improved in the SST design, being the efficiency one of the most important. For the efficiency estimation, there are some contributions in the literature [2]- [5] with values ranging from 88% to 97%.…”

Section: Introductionmentioning

confidence: 99%

Switching frequency optimization for a solid state transformer with energy storage capabilities

Garcia

Saeed

Navarro-Rodríguez

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-This paper is focused on establishing a procedure for measuring the efficiency dependency on the switching frequency for a solid state transformer (SST), being one of the ports connected to an energy storage device (Lithium-Ion battery). Multiple contributions for measuring the efficiency/losses for different power converter structures for energy storage applications can be found in the literature. However, there are few references which consider the effects of the high frequency model of the battery in the complete system performance. This research will obtain a parametric high frequency model of the battery cells, based on a vector fitting method in frequency domain. This model will be used for the estimation of the overall system losses. It will be demonstrated that the contribution of the battery losses, as well as its behavior as a function of the switching frequency, can significantly affect the selection of the converter's switching frequency.

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High-Frequency Transformer Isolated Bidirectional DC–DC Converter Modules With High Efficiency Over Wide Load Range for 20 kVA Solid-State Transformer

Cited by 330 publications

References 27 publications

Control of a three-stage medium voltage solid-state transformer

Control of a three-stage medium voltage solid-state transformer

An Isolated Bidirectional Modular Multilevel DC/DC Converter for Power Electronic Transformer Applications

Switching frequency optimization for a solid state transformer with energy storage capabilities

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