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
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