A matching transformer-less inrush current suppressor for transformers using a series-connected small-rated voltage-source PWM converter - Consideration of the control gains and required ratings of the PWM converter

Hiroaki Yamada, Toshihiko Tanaka, Shigeyuki Funabiki

Research output: Contribution to journalArticle

Abstract

This paper proposes a new inrush current suppressor using a series-connected small-rated PWM converter for a transformer. The PWM converter is directly connected in series between the source and transformer without a matching transformer. The inrush phenomena of the matching transformer, thus, can be avoided. The control gain and required ratings of the series-connected small-rated PWM converter arc discussed in detail. The capacity of the DC capacitor of the PWM converter is also discussed considering the active power flows into the PWM converter. The PSCAD/EMTDC is used to verify the validity of the proposed inrush current suppressor. A prototype experimental model is constructed and tested. The experimental results demonstrate that the proposed suppressor can perfectly overcome the inrush phenomena of transformers.

Original languageEnglish
Pages (from-to)45-55
Number of pages11
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume160
Issue number3
DOIs
Publication statusPublished - Aug 2007
Externally publishedYes

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Gain control
Pulse width modulation
Electric potential
Capacitors

Keywords

  • Inrush current
  • Matching transformer-less
  • Small-rated voltage-source PWM converter
  • Transformer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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title = "A matching transformer-less inrush current suppressor for transformers using a series-connected small-rated voltage-source PWM converter - Consideration of the control gains and required ratings of the PWM converter",
abstract = "This paper proposes a new inrush current suppressor using a series-connected small-rated PWM converter for a transformer. The PWM converter is directly connected in series between the source and transformer without a matching transformer. The inrush phenomena of the matching transformer, thus, can be avoided. The control gain and required ratings of the series-connected small-rated PWM converter arc discussed in detail. The capacity of the DC capacitor of the PWM converter is also discussed considering the active power flows into the PWM converter. The PSCAD/EMTDC is used to verify the validity of the proposed inrush current suppressor. A prototype experimental model is constructed and tested. The experimental results demonstrate that the proposed suppressor can perfectly overcome the inrush phenomena of transformers.",
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N2 - This paper proposes a new inrush current suppressor using a series-connected small-rated PWM converter for a transformer. The PWM converter is directly connected in series between the source and transformer without a matching transformer. The inrush phenomena of the matching transformer, thus, can be avoided. The control gain and required ratings of the series-connected small-rated PWM converter arc discussed in detail. The capacity of the DC capacitor of the PWM converter is also discussed considering the active power flows into the PWM converter. The PSCAD/EMTDC is used to verify the validity of the proposed inrush current suppressor. A prototype experimental model is constructed and tested. The experimental results demonstrate that the proposed suppressor can perfectly overcome the inrush phenomena of transformers.

AB - This paper proposes a new inrush current suppressor using a series-connected small-rated PWM converter for a transformer. The PWM converter is directly connected in series between the source and transformer without a matching transformer. The inrush phenomena of the matching transformer, thus, can be avoided. The control gain and required ratings of the series-connected small-rated PWM converter arc discussed in detail. The capacity of the DC capacitor of the PWM converter is also discussed considering the active power flows into the PWM converter. The PSCAD/EMTDC is used to verify the validity of the proposed inrush current suppressor. A prototype experimental model is constructed and tested. The experimental results demonstrate that the proposed suppressor can perfectly overcome the inrush phenomena of transformers.

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