A fault location method using air-gap fluxes of synchronous generator

Junya Matsuki*, Yasuhiro Hayashi, Toshikazu Nakano, Yoichi Funasaki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This paper deals with experimental investigation on a novel fault location method using air-gap flux distributions of a synchronous generator connected to a power system. Air-gap fluxes are the sum of field fluxes and armature reaction fluxes. Changes in armature current and field current at fault contribute directly to the armature reaction fluxes and field fluxes, then resultant air-gap fluxes. Therefore, air-gap fluxes can be utilized to locate fault. Wavelet analysis is applied to induced voltages of search coils which are wound around a stator tooth top for measurement of air-gap flux. It is shown that fault type and location are estimated from the change of search coil voltages measured during fault.

Original languageEnglish
Pages (from-to)495-501
Number of pages7
JournalIEEJ Transactions on Power and Energy
Issue number3
Publication statusPublished - 2007
Externally publishedYes


  • Air-gap flux
  • Fault location
  • Synchronous generator
  • Transmission line fault
  • Wavelet analysis

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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