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

Research output: Contribution to journalJournal articleResearchpeer-review

53 Citations (Scopus)
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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.
Original languageEnglish
JournalI E E E Transactions on Power Electronics
Volume30
Issue number7
Pages (from-to)3457-3470
Number of pages14
ISSN0885-8993
DOIs
Publication statusPublished - 2015

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Pulse width modulation
Fluxes
Modulation
Electric potential
Vector spaces

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

Cite this

@article{ef81ea08aad74fcbb32669f92939653d,
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.

In: I E E E Transactions on Power Electronics, Vol. 30, No. 7, 2015, p. 3457-3470.

Research output: Contribution to journalJournal articleResearchpeer-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 -