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Influence of rotor eccentricity on circulating current losses in irregular winding of generator(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2017年09
Page:
38-46
Research Field:
Publishing date:

Info

Title:
Influence of rotor eccentricity on circulating current losses in irregular winding of generator
Author(s):
?LIANG Yan-ping JIA Guo-chao
?(School of Electric and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)
Keywords:
turbo-generator asymmetric-branch winding static eccentricity circulating current circulating current loss finite element method
PACS:
TM 311
DOI:
10.15938/j.emc.2017.09.006
Abstract:
In order to research the influence of static eccentricity on circulating current and circulating current losses of asymmetric-branch winding in turbo-generator,a 397 MW turbo-generator with two poles was taken as an example and its two-dimensional transient finite element model was established for calculating circulating current of each branch in stator winding by different rotor eccentricities. Variations and harmonic contents of circulating current in each branch were obtained,and based on that,the corresponding circulating current losses were calculated. Finally,the results are compared with that of symmetric-branch winding. Analysis shows that the circulating current losses of asymmetric-branch winding increases with the growth of eccentricity in the case of static eccentric. Under the same eccentricity,the circulating current losses of asymmetric-branch winding are greater than symmetric-branch winding. Influence of the circulating current losses should be fully considered in the engineering design of asymmetricbranch winding.

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Last Update: 2018-02-06