Calculation and harmonic analysis of transient inrush currents in three-phase transformers

J. C. Yeh, C. E. Lin, C. L. Huang, C. L. Cheng

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Measurements of transient inrush currents in three-phase transformers offer important data for power system operation and protection. Because three-phase transformers are more widely used in industrial applications than single-phase transformers, the inrush current of the three-phase transformer is worthy of investigation. This paper proposes a simple method, extended from that for single-phase transformers, to investigate three-phase transformer inrush currents. Harmonic analysis of the inrush currents is carried out. Various structures of three-phase transformers, including winding connections and loading conditions, are discussed. The simulation results are compared with experimental results. The proposed method is simple and effective for transformer banks and five-limb transformers. The harmonic analysis of inrush currents is useful for protective relay design.

Original languageEnglish
Pages (from-to)93-102
Number of pages10
JournalElectric Power Systems Research
Volume30
Issue number2
DOIs
Publication statusPublished - 1994 Jan 1

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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