A Medium Frequency Transformer Design Tool with Methodologies Adapted to Various Structures

Fouineau, Alexis; Guillet, Martin; Lefebvre, Bruno; Raulet, Marie–Ange; Sixdenier, Fabien

doi:10.1109/ever48776.2020.9243104

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…The main design parameters are presented in Table 2. The main parameters of the magnetic components were estimated following the procedures described in [31]. Oil insulation is considered, allowing for a compact design.…”

Section: Unidirectional Isolated Dc-dc Converter a Topologymentioning

confidence: 99%

Phase-Shifted Full Bridge DC–DC Converter for Photovoltaic MVDC Power Collection Networks

et al. 2023

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The connection of photovoltaic sources to a medium voltage dc collection network requires a dc-dc converter having specific grid-connected converter capabilities. This article presents the application of a phase-shifted full bridge (PSFB) converter for medium voltage dc collection networks suited to photovoltaic power plants. The unidirectional structure of the converter is beneficial in terms of cost and simplicity of hardware implementation of the MV circuit components. The design of the PSFB converter is presented considering ratings of 250 kW power, 1.2 kV input, and 20 kV output. A converter model and a novel PSFB input voltage control regulating the dc-link voltage are developed and verified. A tuning method is given taking into account the effect of different transformer leakage inductance values. The behaviour of the PSFB under the PV power production profile and MV network faults is studied in simulation and verified against a reduced-scale prototype with ratings of 30 kW and 350 V / 600 V operating at 20 kHz. The experimental verification of the control is performed considering a real PV power profile. The experimental results under faults show the same response as in simulations. The PSFB fault response is observed to be superior compared to other dc-dc topologies with capacitive output filter only, making it suitable for gridconnected operation.INDEX TERMS DC-DC power converters, photovoltaic systems, medium voltage.

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Section: Unidirectional Isolated Dc-dc Converter a Topologymentioning

confidence: 99%

Phase-Shifted Full Bridge DC–DC Converter for Photovoltaic MVDC Power Collection Networks

et al. 2023

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“…The voltage and current waveforms in the inductor at the operating point where the peak current is the highest have been used as the worst-case scenario to design the inductor. The design is done using the tool to size magnetic components developed in [10].…”

Section: Inductormentioning

confidence: 99%

Methodology to obtain the specifications and perform the sizing of a power flow controller for meshed HVDC grids

Sau-Bassols

Morel

Touré

et al. 2021

2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)

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Power flow controllers (PFC) or current flow controllers (CFC) are expected to be required in future HVDC grids to control the current flows and avoid congestions. This work proposes a methodology to obtain the specifications, select the most suitable converter structure and perform the sizing of an interline PFC. Then, the methodology is applied to a real HVDC grid case study, obtaining the specifications, the selected converter structure and the sizing of the power electronic elements and the passive components. The results show that the PFC is a medium voltage converter with high current rating requiring some switches in series and interleaved branches. With such a series/parallel association, the main elements of the converter are available on the market except for the inductances which can be manufactured on-demand without major technical locks.

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“…As an accurate electric field calculation usually needs relatively slow FEM simulations, this becomes a bottleneck in the optimization routine. Therefore, converter optimization procedures often use rather rough approximations for the insulation modeling [2], [6]- [8], which could result in an oversized transformer design or, in worst case, in a breakdown. Especially for modular medium voltage transformer topologies, as given in [7], an accurate insulation design is crucial, since in such systems the secondary side often has to isolate a high (DC) offset voltage.…”

Section: Introductionmentioning

confidence: 99%

Fast and Accurate Electric Field Model for Optimizing the Insulation Design of Magnetic Devices

Korthauer

Biela

2021

2021 IEEE Design Methodologies Conference (DMC)

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A bottleneck in optimization procedures of magnetic components is the calculation of the electric field strength (e.g. for an optimized insulation design) since this is based either on a slow numerical field simulation or on rough approximations. Hence, a fast and accurate method for the electric field calculation in the winding window is crucial for a fast optimization process. This paper presents a novel electric field calculation method that combines a variable potential function with a Schwarz-Christoffel (SC) mapping. This leads to accurate results, that match Finite Element Method (FEM) simulations as close as 5 %. The proposed method is more than 200 times faster than FEM and robust against parameter changes.

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A Medium Frequency Transformer Design Tool with Methodologies Adapted to Various Structures

Cited by 6 publications

References 33 publications

Phase-Shifted Full Bridge DC–DC Converter for Photovoltaic MVDC Power Collection Networks

Phase-Shifted Full Bridge DC–DC Converter for Photovoltaic MVDC Power Collection Networks

Methodology to obtain the specifications and perform the sizing of a power flow controller for meshed HVDC grids

Fast and Accurate Electric Field Model for Optimizing the Insulation Design of Magnetic Devices

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