• DocumentCode
    112764
  • Title

    Numerical calculation of circulating current losses in stator transposition bar of large hydro-generator

  • Author

    Yanping Liang ; Xu Bian ; Lichao Yang ; Lei Wu

  • Author_Institution
    Coll. of Electr. & Electron. Eng., Harbin Univ. of Sci. & Technol., Harbin, China
  • Volume
    9
  • Issue
    4
  • fYear
    2015
  • fDate
    7 2015
  • Firstpage
    485
  • Lastpage
    491
  • Abstract
    To reduce circulating current losses in stator strands of hydro-generator, strand transposition is widely used in stator bars. At present, the traditional analytical method for calculating circulating current losses cannot accurately simulate the distribution of leakage magnetic field, which will bring a large deviation to the calculation result and not benefit the winding design. The numerical calculation method for circulating current losses in stator bar is presented in this study, by which the leakage magnetic field distribution of stator transposition bar can be described in detail through establishing three-dimensional actual transposition model. The 0°/360°/0° transposition bar in a 180 MW hydro-generator is taken as an example and the circulating current losses in stator bar strands are calculated. The causes of errors in traditional analytical method are discussed through the comparison of the leakage magnetic field distribution obtained by numerical calculation method and traditional analytical method.
  • Keywords
    eddy current losses; hydroelectric generators; magnetic leakage; numerical analysis; stators; circulating current losses; hydrogenerator; leakage magnetic fleld distribution; numerical calculation method; power 180 MW; stator transposition bar; strand transposition;
  • fLanguage
    English
  • Journal_Title
    Science, Measurement & Technology, IET
  • Publisher
    iet
  • ISSN
    1751-8822
  • Type

    jour

  • DOI
    10.1049/iet-smt.2014.0230
  • Filename
    7138672