Experience with stator insulation testing and turn/phase insulation failures in the power generation industry

H. Kim, T. Kong, Sang Bin Lee, T. J. Kang, N. Oh, Y. Kim, S. Park, G. C. Stone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The reliability of medium voltage (MV) motors used for driving pumps, fans, and other loads in the power generation industry is critical for continued power production. Periodic testing of stator winding insulation, which is the most vulnerable component in MV motors, is an essential part of predictive maintenance for preventing unplanned reduction in the power generation capability. Korea Electric Power Corporation (KEPCO) Research Institute's 17+ years of experience on predictive maintenance of stator insulation for MV motors is presented in this paper. KEPCO's stator insulation test program and statistics of test records are summarized, and cases of recent turn and phase insulation failures that resulted in motor forced outages are investigated. Analysis of the turn or phase insulation failures and insulation test records performed on the failed motors show that it is difficult to predict turn or phase insulation failures with the insulation tests currently performed. Turn or phase insulation test methods are summarized and evaluated based on the findings of the investigation to help target future research efforts towards industrial needs.

Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages21-30
Number of pages10
ISBN (Electronic)9781509004096
DOIs
Publication statusPublished - 2017 Oct 6
Event11th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 - Tinos, Greece
Duration: 2017 Aug 292017 Sep 1

Publication series

NameProceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017
Volume2017-January

Conference

Conference11th IEEE International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017
CountryGreece
CityTinos
Period17/8/2917/9/1

Keywords

  • AC Machines
  • Phase Insulation
  • Predictive Maintenance
  • Stator Insulation Testing
  • Turn Insulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

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  • Cite this

    Kim, H., Kong, T., Lee, S. B., Kang, T. J., Oh, N., Kim, Y., Park, S., & Stone, G. C. (2017). Experience with stator insulation testing and turn/phase insulation failures in the power generation industry. In Proceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 (pp. 21-30). (Proceedings of the 2017 IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017; Vol. 2017-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/DEMPED.2017.8062329