A novel method of suppressing the inrush current of transformers by using a series-connected voltage-source PWM converter

Hiroaki Yamada, Toshihiko Tanaka, Shigeyuki Funabiki

Research output: Contribution to journalArticle

Abstract

This paper proposes a novel method of suppressing the inrush current of transformers. A small-rated voltage-source PWM converter is connected in series to the transformers through a matching transformer. As the connected PWM converter serves as a resistor for the source current, no inrush phenomena occurs. The required rating of the PWM converter, which serves as the damping resistor for the inrush phenomena, is 1/400 that of the main transformers in single-phase circuits. In three-phase circuits, it is 1/900. The basic principle of the proposed method is discussed. Digital computer simulation is implemented to confirm the validity and excellent practicability of the proposed method using the PSCAD/EMTDC. A prototype experimental model is constructed and tested. The experimental results demonstrate that the proposed method can perfectly suppress the inrush phenomena.

Original languageEnglish
Pages (from-to)56-65
Number of pages10
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume157
Issue number4
DOIs
Publication statusPublished - Dec 2006

Keywords

  • Core saturation
  • Inrush current
  • PSCAD/EMTDC
  • Re-inrush phenomena
  • Series-connected voltage-source PWM converter
  • Transformer model

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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