An experimental design for static eccentricity detection in synchronous machines using a Cramér-Rao lower bound technique

Wesley Doorsamy, Ahmed Abou Elyazied Abdallh, Willem A. Cronje, Luc Dupré

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Detection of a static eccentricity fault in rotating electrical machines is possible through several measurement techniques, such as shaft voltages and flux probes. A predictive maintenance approach typically requires that the condition monitoring technique is online, accurate, and able to detect incipient faults. This paper presents a study of the optimal measurement modality that leads to a minimal identification error of the static eccentricity in synchronous machines. The Cramér-Rao lower bound technique is implemented by taking into account both measurement and model uncertainties. Numerical results are obtained using a two-dimensional finite element model and is experimentally validated on a synchronous two-pole generator. Results indicate that shaft voltage measurements are better suited to the detection of static eccentricity.

Original languageEnglish
Article number6891297
Pages (from-to)254-261
Number of pages8
JournalIEEE Transactions on Energy Conversion
Volume30
Issue number1
DOIs
Publication statusPublished - Mar 2015
Externally publishedYes

Keywords

  • Cramér-Rao lower bound
  • experimental design
  • static eccentricity
  • synchronous generator

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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