An iron core probe based inter-laminar core fault detection technique for generator stator cores

Sang Bin Lee, Gerald B. Kliman, Manoj R. Shah, N. Kutty Nair, R. Mark Lusted

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

A new technique for detecting incipient inter-laminar insulation failure of laminated stator cores of large generators is proposed in this paper. The proposed scheme is a low flux induction method that employs a novel probe for core testing. The new probe configuration, which uses magnetic material and is scanned in the wedge depression area, significantly improves the sensitivity of fault detection as well as user convenience compared to existing methods. Experimental results from various test generators tested in factory, field, and lab environments under a number of fault conditions are presented to verify the sensitivity and reliability of the proposed scheme.

Original languageEnglish
Pages (from-to)344-351
Number of pages8
JournalIEEE Transactions on Energy Conversion
Volume20
Issue number2
DOIs
Publication statusPublished - 2005 Jun

Keywords

  • AC generators
  • Fault diagnosis
  • Fault location
  • Insulation testing
  • Magnetic cores
  • Maintenance
  • Reliability

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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