Modified discontinuous PWM for size reduction of the circulating current filter in parallel interleaved converters

Ghanshyamsinh Vijaysinh Gohil, Ram Krishan Maheshwari, Lorand Bede, Tamas Kerekes, Remus Teodorescu, Marco Liserre, Frede Blaabjerg

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Resumé

Parallel voltage-source converters (VSCs) require an inductive filter to suppress the circulating current. The size of this filter can be minimized by reducing either the maximum value of the flux linkage or the core losses. This paper presents a modified discontinuous pulsewidth modulation (DPWM) scheme to reduce the maximum value of the flux linkage and the core losses in the circulating current filter. In the proposed PWM scheme, the dwell time of an active vector is divided within a half-carrier cycle to ensure simultaneous occurrence of the same zero vectors in both VSCs. A function to decide the ratio of the dwell time of the divided active vector is also presented. The effect of the proposed PWM scheme on the maximum value of the flux linkage and the core losses is analyzed and compared with that of the space vector modulation and 60$^circ$ clamped DPWM schemes. The analytical expressions for the maximum value of the flux linkage are derived for each of these PWM schemes. In addition, the effect of the proposed PWM scheme on the line current ripple and the switching losses is also analyzed and compared. To verify the analysis, experimental results are presented, which prove the effectiveness of the proposed PWM scheme.
OriginalsprogEngelsk
TidsskriftI E E E Transactions on Power Electronics
Vol/bind30
Udgave nummer7
Sider (fra-til)3457-3470
Antal sider14
ISSN0885-8993
DOI
StatusUdgivet - 2015

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Pulse width modulation
Fluxes
Modulation
Electric potential
Vector spaces

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    title = "Modified discontinuous PWM for size reduction of the circulating current filter in parallel interleaved converters",
    abstract = "Parallel voltage-source converters (VSCs) require an inductive filter to suppress the circulating current. The size of this filter can be minimized by reducing either the maximum value of the flux linkage or the core losses. This paper presents a modified discontinuous pulsewidth modulation (DPWM) scheme to reduce the maximum value of the flux linkage and the core losses in the circulating current filter. In the proposed PWM scheme, the dwell time of an active vector is divided within a half-carrier cycle to ensure simultaneous occurrence of the same zero vectors in both VSCs. A function to decide the ratio of the dwell time of the divided active vector is also presented. The effect of the proposed PWM scheme on the maximum value of the flux linkage and the core losses is analyzed and compared with that of the space vector modulation and 60$^circ$ clamped DPWM schemes. The analytical expressions for the maximum value of the flux linkage are derived for each of these PWM schemes. In addition, the effect of the proposed PWM scheme on the line current ripple and the switching losses is also analyzed and compared. To verify the analysis, experimental results are presented, which prove the effectiveness of the proposed PWM scheme.",
    keywords = "Circulating current, common-mode inductor, coupled inductor, interleaving, Parallel inverters, Pulse Width Modulation, Voltage Source Converter (VSC), wind turbine, wind energy systems, wind energy conversion system, parallel interleaved inverters, parallel interleaved converters, Phase-shifted carrier-based pulsewidth modulation (PSC-PWM), circulating current suppression, common mode circulating current, circulating current control",
    author = "Gohil, {Ghanshyamsinh Vijaysinh} and Maheshwari, {Ram Krishan} and Lorand Bede and Tamas Kerekes and Remus Teodorescu and Marco Liserre and Frede Blaabjerg",
    year = "2015",
    doi = "10.1109/TPEL.2014.2339392",
    language = "English",
    volume = "30",
    pages = "3457--3470",
    journal = "I E E E Transactions on Power Electronics",
    issn = "0885-8993",
    publisher = "IEEE",
    number = "7",

    }

    Modified discontinuous PWM for size reduction of the circulating current filter in parallel interleaved converters. / Gohil, Ghanshyamsinh Vijaysinh; Maheshwari, Ram Krishan; Bede, Lorand; Kerekes, Tamas; Teodorescu, Remus; Liserre, Marco; Blaabjerg, Frede.

    I: I E E E Transactions on Power Electronics, Bind 30, Nr. 7, 2015, s. 3457-3470.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Modified discontinuous PWM for size reduction of the circulating current filter in parallel interleaved converters

    AU - Gohil, Ghanshyamsinh Vijaysinh

    AU - Maheshwari, Ram Krishan

    AU - Bede, Lorand

    AU - Kerekes, Tamas

    AU - Teodorescu, Remus

    AU - Liserre, Marco

    AU - Blaabjerg, Frede

    PY - 2015

    Y1 - 2015

    N2 - Parallel voltage-source converters (VSCs) require an inductive filter to suppress the circulating current. The size of this filter can be minimized by reducing either the maximum value of the flux linkage or the core losses. This paper presents a modified discontinuous pulsewidth modulation (DPWM) scheme to reduce the maximum value of the flux linkage and the core losses in the circulating current filter. In the proposed PWM scheme, the dwell time of an active vector is divided within a half-carrier cycle to ensure simultaneous occurrence of the same zero vectors in both VSCs. A function to decide the ratio of the dwell time of the divided active vector is also presented. The effect of the proposed PWM scheme on the maximum value of the flux linkage and the core losses is analyzed and compared with that of the space vector modulation and 60$^circ$ clamped DPWM schemes. The analytical expressions for the maximum value of the flux linkage are derived for each of these PWM schemes. In addition, the effect of the proposed PWM scheme on the line current ripple and the switching losses is also analyzed and compared. To verify the analysis, experimental results are presented, which prove the effectiveness of the proposed PWM scheme.

    AB - Parallel voltage-source converters (VSCs) require an inductive filter to suppress the circulating current. The size of this filter can be minimized by reducing either the maximum value of the flux linkage or the core losses. This paper presents a modified discontinuous pulsewidth modulation (DPWM) scheme to reduce the maximum value of the flux linkage and the core losses in the circulating current filter. In the proposed PWM scheme, the dwell time of an active vector is divided within a half-carrier cycle to ensure simultaneous occurrence of the same zero vectors in both VSCs. A function to decide the ratio of the dwell time of the divided active vector is also presented. The effect of the proposed PWM scheme on the maximum value of the flux linkage and the core losses is analyzed and compared with that of the space vector modulation and 60$^circ$ clamped DPWM schemes. The analytical expressions for the maximum value of the flux linkage are derived for each of these PWM schemes. In addition, the effect of the proposed PWM scheme on the line current ripple and the switching losses is also analyzed and compared. To verify the analysis, experimental results are presented, which prove the effectiveness of the proposed PWM scheme.

    KW - Circulating current

    KW - common-mode inductor

    KW - coupled inductor

    KW - interleaving

    KW - Parallel inverters

    KW - Pulse Width Modulation

    KW - Voltage Source Converter (VSC)

    KW - wind turbine

    KW - wind energy systems

    KW - wind energy conversion system

    KW - parallel interleaved inverters

    KW - parallel interleaved converters

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

    KW - circulating current suppression

    KW - common mode circulating current

    KW - circulating current control

    U2 - 10.1109/TPEL.2014.2339392

    DO - 10.1109/TPEL.2014.2339392

    M3 - Journal article

    VL - 30

    SP - 3457

    EP - 3470

    JO - I E E E Transactions on Power Electronics

    JF - I E E E Transactions on Power Electronics

    SN - 0885-8993

    IS - 7

    ER -