Magnetic Integration for Parallel Interleaved VSCs Connected in a Whiffletree Configuration

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

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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Resumé

The Voltage Source Converters (VSCs) are often connected in parallel to realize a high current rating. In such systems, the harmonic quality of the output voltage can be improved by interleaving the carrier signals of the parallel VSCs. However, an additional inductive filter is often required to suppress the circulating current that flows between the parallel interleaved VSCs. One of the ways to deal with the circulating current problem is to use the coupled inductors in a whiffletree configuration. This paper proposes the integration of the line filter inductor and the circulating current filter inductor in a single magnetic component for such systems. The fundamental frequency component of the flux is mostly confined to the limbs around which the coils are placed, whereas other parts of the magnetic structure only experiences high frequency flux excitation. As a result, the integrated inductor can be made smaller and the power density of the overall converter system can be increased. The magnetic structure of the integrated inductor is analyzed and performance is verified by simulation and experimental studies.
OriginalsprogEngelsk
TidsskriftI E E E Transactions on Power Electronics
Vol/bind31
Udgave nummer11
Sider (fra-til)7797 - 7808
Antal sider12
ISSN0885-8993
DOI
StatusUdgivet - nov. 2016

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title = "Magnetic Integration for Parallel Interleaved VSCs Connected in a Whiffletree Configuration",
abstract = "The Voltage Source Converters (VSCs) are often connected in parallel to realize a high current rating. In such systems, the harmonic quality of the output voltage can be improved by interleaving the carrier signals of the parallel VSCs. However, an additional inductive filter is often required to suppress the circulating current that flows between the parallel interleaved VSCs. One of the ways to deal with the circulating current problem is to use the coupled inductors in a whiffletree configuration. This paper proposes the integration of the line filter inductor and the circulating current filter inductor in a single magnetic component for such systems. The fundamental frequency component of the flux is mostly confined to the limbs around which the coils are placed, whereas other parts of the magnetic structure only experiences high frequency flux excitation. As a result, the integrated inductor can be made smaller and the power density of the overall converter system can be increased. The magnetic structure of the integrated inductor is analyzed and performance is verified by simulation and experimental studies.",
keywords = "Parallel inverters, Integrated inductor, Wind energy conversion system, Harmonic filter design, Harmonic filter, Parallel interleaved inverters, Parallel interleaved converters, Optimized filter design, High power converters, Phase-shifted carrier-based pulsewidth modulation (PSC-PWM), Circulating current , Circulating current suppression, Coupled inductor, Inter phase transformer, Inter cell transformer",
author = "Gohil, {Ghanshyamsinh Vijaysinh} and Lorand Bede and Remus Teodorescu and Tamas Kerekes and Frede Blaabjerg",
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Magnetic Integration for Parallel Interleaved VSCs Connected in a Whiffletree Configuration. / Gohil, Ghanshyamsinh Vijaysinh; Bede, Lorand; Teodorescu, Remus; Kerekes, Tamas; Blaabjerg, Frede.

I: I E E E Transactions on Power Electronics, Bind 31, Nr. 11, 11.2016, s. 7797 - 7808.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Magnetic Integration for Parallel Interleaved VSCs Connected in a Whiffletree Configuration

AU - Gohil, Ghanshyamsinh Vijaysinh

AU - Bede, Lorand

AU - Teodorescu, Remus

AU - Kerekes, Tamas

AU - Blaabjerg, Frede

PY - 2016/11

Y1 - 2016/11

N2 - The Voltage Source Converters (VSCs) are often connected in parallel to realize a high current rating. In such systems, the harmonic quality of the output voltage can be improved by interleaving the carrier signals of the parallel VSCs. However, an additional inductive filter is often required to suppress the circulating current that flows between the parallel interleaved VSCs. One of the ways to deal with the circulating current problem is to use the coupled inductors in a whiffletree configuration. This paper proposes the integration of the line filter inductor and the circulating current filter inductor in a single magnetic component for such systems. The fundamental frequency component of the flux is mostly confined to the limbs around which the coils are placed, whereas other parts of the magnetic structure only experiences high frequency flux excitation. As a result, the integrated inductor can be made smaller and the power density of the overall converter system can be increased. The magnetic structure of the integrated inductor is analyzed and performance is verified by simulation and experimental studies.

AB - The Voltage Source Converters (VSCs) are often connected in parallel to realize a high current rating. In such systems, the harmonic quality of the output voltage can be improved by interleaving the carrier signals of the parallel VSCs. However, an additional inductive filter is often required to suppress the circulating current that flows between the parallel interleaved VSCs. One of the ways to deal with the circulating current problem is to use the coupled inductors in a whiffletree configuration. This paper proposes the integration of the line filter inductor and the circulating current filter inductor in a single magnetic component for such systems. The fundamental frequency component of the flux is mostly confined to the limbs around which the coils are placed, whereas other parts of the magnetic structure only experiences high frequency flux excitation. As a result, the integrated inductor can be made smaller and the power density of the overall converter system can be increased. The magnetic structure of the integrated inductor is analyzed and performance is verified by simulation and experimental studies.

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KW - Parallel interleaved converters

KW - Optimized filter design

KW - High power converters

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

KW - Circulating current

KW - Circulating current suppression

KW - Coupled inductor

KW - Inter phase transformer

KW - Inter cell transformer

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JO - I E E E Transactions on Power Electronics

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