Dual Converter Fed Open-End Transformer Topology with Parallel Converters and Integrated Magnetics

Ghanshyamsinh Vijaysinh Gohil, Lorand Bede, Remus Teodorescu, Tamas Kerekes, Frede Blaabjerg

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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Resumé

A converter system for high power applications, connected to a medium-voltage network using a stepup transformer, is presented in this paper. The converterside winding of the transformer is configured as an openend and both the ends of the windings are fed from two different converter groups. Each converter group comprises of two parallel Voltage Source Converters (VSCs), whose carrier signals are interleaved to improve the harmonic quality of the resultant switched output voltage of that converter group. However, an additional inductive component is required to suppress the circulating current that flows between the parallel interleaved VSCs. An integrated inductor is proposed which suppresses the circulating current in both the converter groups. In addition, the functionality of the line filter inductor is also integrated. Flux in various parts of the integrated inductor is analyzed and a design procedure is also described. The volume and the losses of the proposed solution are compared with that of the state-of-art solution. The control of the proposed converter system is also discussed. The analysis has been verified by the simulation and experimental results.
OriginalsprogEngelsk
TidsskriftI E E E Transactions on Industrial Electronics
Vol/bind63
Udgave nummer8
Sider (fra-til)4929 - 4941
Antal sider13
ISSN0278-0046
DOI
StatusUdgivet - aug. 2016

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    title = "Dual Converter Fed Open-End Transformer Topology with Parallel Converters and Integrated Magnetics",
    abstract = "A converter system for high power applications, connected to a medium-voltage network using a stepup transformer, is presented in this paper. The converterside winding of the transformer is configured as an openend and both the ends of the windings are fed from two different converter groups. Each converter group comprises of two parallel Voltage Source Converters (VSCs), whose carrier signals are interleaved to improve the harmonic quality of the resultant switched output voltage of that converter group. However, an additional inductive component is required to suppress the circulating current that flows between the parallel interleaved VSCs. An integrated inductor is proposed which suppresses the circulating current in both the converter groups. In addition, the functionality of the line filter inductor is also integrated. Flux in various parts of the integrated inductor is analyzed and a design procedure is also described. The volume and the losses of the proposed solution are compared with that of the state-of-art solution. The control of the proposed converter system is also discussed. The analysis has been verified by the simulation and experimental results.",
    keywords = "Voltage source converters (VSC), Parallel, Interleaving, Dual converter, Open-end transformer, Wind power, Integrated inductor, Magnetic integration, Wind energy conversion system, Parallel inverters, wind turbine, wind energy systems, harmonic filter design, harmonic filter, LCL filter, Parallel interleaved inverters, Parallel interleaved converters, High power converters, Phase-shifted carrier-based pulsewidth modulation (PSC-PWM), Circulating current , Circulating current suppression, Inter phase transformer, Circulating current control, Inter cell transformer",
    author = "Gohil, {Ghanshyamsinh Vijaysinh} and Lorand Bede and Remus Teodorescu and Tamas Kerekes and Frede Blaabjerg",
    year = "2016",
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    pages = "4929 -- 4941",
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    Dual Converter Fed Open-End Transformer Topology with Parallel Converters and Integrated Magnetics. / Gohil, Ghanshyamsinh Vijaysinh; Bede, Lorand; Teodorescu, Remus; Kerekes, Tamas; Blaabjerg, Frede.

    I: I E E E Transactions on Industrial Electronics, Bind 63, Nr. 8, 08.2016, s. 4929 - 4941.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Dual Converter Fed Open-End Transformer Topology with Parallel Converters and Integrated Magnetics

    AU - Gohil, Ghanshyamsinh Vijaysinh

    AU - Bede, Lorand

    AU - Teodorescu, Remus

    AU - Kerekes, Tamas

    AU - Blaabjerg, Frede

    PY - 2016/8

    Y1 - 2016/8

    N2 - A converter system for high power applications, connected to a medium-voltage network using a stepup transformer, is presented in this paper. The converterside winding of the transformer is configured as an openend and both the ends of the windings are fed from two different converter groups. Each converter group comprises of two parallel Voltage Source Converters (VSCs), whose carrier signals are interleaved to improve the harmonic quality of the resultant switched output voltage of that converter group. However, an additional inductive component is required to suppress the circulating current that flows between the parallel interleaved VSCs. An integrated inductor is proposed which suppresses the circulating current in both the converter groups. In addition, the functionality of the line filter inductor is also integrated. Flux in various parts of the integrated inductor is analyzed and a design procedure is also described. The volume and the losses of the proposed solution are compared with that of the state-of-art solution. The control of the proposed converter system is also discussed. The analysis has been verified by the simulation and experimental results.

    AB - A converter system for high power applications, connected to a medium-voltage network using a stepup transformer, is presented in this paper. The converterside winding of the transformer is configured as an openend and both the ends of the windings are fed from two different converter groups. Each converter group comprises of two parallel Voltage Source Converters (VSCs), whose carrier signals are interleaved to improve the harmonic quality of the resultant switched output voltage of that converter group. However, an additional inductive component is required to suppress the circulating current that flows between the parallel interleaved VSCs. An integrated inductor is proposed which suppresses the circulating current in both the converter groups. In addition, the functionality of the line filter inductor is also integrated. Flux in various parts of the integrated inductor is analyzed and a design procedure is also described. The volume and the losses of the proposed solution are compared with that of the state-of-art solution. The control of the proposed converter system is also discussed. The analysis has been verified by the simulation and experimental results.

    KW - Voltage source converters (VSC)

    KW - Parallel

    KW - Interleaving

    KW - Dual converter

    KW - Open-end transformer

    KW - Wind power

    KW - Integrated inductor

    KW - Magnetic integration

    KW - Wind energy conversion system

    KW - Parallel inverters

    KW - wind turbine

    KW - wind energy systems

    KW - harmonic filter design

    KW - harmonic filter

    KW - LCL filter

    KW - Parallel interleaved inverters

    KW - Parallel interleaved converters

    KW - High power converters

    KW - Phase-shifted carrier-based pulsewidth modulation (PSC-PWM)

    KW - Circulating current

    KW - Circulating current suppression

    KW - Inter phase transformer

    KW - Circulating current control

    KW - Inter cell transformer

    U2 - 10.1109/TIE.2016.2548999

    DO - 10.1109/TIE.2016.2548999

    M3 - Journal article

    VL - 63

    SP - 4929

    EP - 4941

    JO - I E E E Transactions on Industrial Electronics

    JF - I E E E Transactions on Industrial Electronics

    SN - 0278-0046

    IS - 8

    ER -