Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator
The major reasons that cause the damage of damper bars in the leeward side are found in this paper. It provides a route for the structure optimization design of a hydro generator. Firstly, capacity of a 24 MW bulb tubular turbine generator is taken as an example in this paper. The transient electrom...
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Polish Academy of Sciences
2017-09-01
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doaj-f5f2f397b34b4e929eee9c55f087cf612020-11-25T03:24:37ZengPolish Academy of SciencesArchives of Electrical Engineering2300-25062017-09-0166357158110.1515/aee-2017-0043aee-2017-0043Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generatorQiu Hongbo0Fan Xiaobin1Yi Ran2Feng Jianqin3Wu Jie4Yang Cunxiang5Zhao Haiyang6College of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, ChinaCollege of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, ChinaCollege of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, ChinaCollege of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, ChinaCollege of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, ChinaCollege of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, ChinaCollege of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing, ChinaThe major reasons that cause the damage of damper bars in the leeward side are found in this paper. It provides a route for the structure optimization design of a hydro generator. Firstly, capacity of a 24 MW bulb tubular turbine generator is taken as an example in this paper. The transient electromagnetic field model is established, and the correctness of the model is verified by the comparison of experimental results and simulation data. Secondly, when the generator is operated at rated condition, the eddy current density distributions of damper bars are studied. And the asymmetric phenomenon of the eddy current density on damper bars is discovered. The change laws of the eddy currents in damper bars are determined through further analysis. Thirdly, through the study of eddy current distributions under different conditions, it is confirmed that the stator slots and armature reaction are the main factors to affect the asymmetric distribution of the eddy current in damper bars. Finally, the studies of the magnetic density distribution and theoretical analysis revealed the asymmetric distribution mechanism of eddy current density.http://www.degruyter.com/view/j/aee.2017.66.issue-3/aee-2017-0043/aee-2017-0043.xml?format=INTdamper barsbulb tubular turbine generatorelectromagnetic fieldeddy current |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qiu Hongbo Fan Xiaobin Yi Ran Feng Jianqin Wu Jie Yang Cunxiang Zhao Haiyang |
spellingShingle |
Qiu Hongbo Fan Xiaobin Yi Ran Feng Jianqin Wu Jie Yang Cunxiang Zhao Haiyang Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator Archives of Electrical Engineering damper bars bulb tubular turbine generator electromagnetic field eddy current |
author_facet |
Qiu Hongbo Fan Xiaobin Yi Ran Feng Jianqin Wu Jie Yang Cunxiang Zhao Haiyang |
author_sort |
Qiu Hongbo |
title |
Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator |
title_short |
Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator |
title_full |
Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator |
title_fullStr |
Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator |
title_full_unstemmed |
Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator |
title_sort |
eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator |
publisher |
Polish Academy of Sciences |
series |
Archives of Electrical Engineering |
issn |
2300-2506 |
publishDate |
2017-09-01 |
description |
The major reasons that cause the damage of damper bars in the leeward side are found in this paper. It provides a route for the structure optimization design of a hydro generator. Firstly, capacity of a 24 MW bulb tubular turbine generator is taken as an example in this paper. The transient electromagnetic field model is established, and the correctness of the model is verified by the comparison of experimental results and simulation data. Secondly, when the generator is operated at rated condition, the eddy current density distributions of damper bars are studied. And the asymmetric phenomenon of the eddy current density on damper bars is discovered. The change laws of the eddy currents in damper bars are determined through further analysis. Thirdly, through the study of eddy current distributions under different conditions, it is confirmed that the stator slots and armature reaction are the main factors to affect the asymmetric distribution of the eddy current in damper bars. Finally, the studies of the magnetic density distribution and theoretical analysis revealed the asymmetric distribution mechanism of eddy current density. |
topic |
damper bars bulb tubular turbine generator electromagnetic field eddy current |
url |
http://www.degruyter.com/view/j/aee.2017.66.issue-3/aee-2017-0043/aee-2017-0043.xml?format=INT |
work_keys_str_mv |
AT qiuhongbo eddycurrentdensityasymmetricdistributionofdamperbarsinbulbtubularturbinegenerator AT fanxiaobin eddycurrentdensityasymmetricdistributionofdamperbarsinbulbtubularturbinegenerator AT yiran eddycurrentdensityasymmetricdistributionofdamperbarsinbulbtubularturbinegenerator AT fengjianqin eddycurrentdensityasymmetricdistributionofdamperbarsinbulbtubularturbinegenerator AT wujie eddycurrentdensityasymmetricdistributionofdamperbarsinbulbtubularturbinegenerator AT yangcunxiang eddycurrentdensityasymmetricdistributionofdamperbarsinbulbtubularturbinegenerator AT zhaohaiyang eddycurrentdensityasymmetricdistributionofdamperbarsinbulbtubularturbinegenerator |
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