Eddy current density asymmetric distribution of damper bars in bulb tubular turbine generator

• Autorzy: Qiu H. , Fan X. , Yi R. , Feng J. , Wu J. , YANG C. , ZHAO H.

Identyfikatory

DOI

10.1515/aee-2017-0043

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

damper bars; bulb tubular turbine generator; electromagnetic field; eddy current

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2017
• Tom: Vol. 66, nr 3
• Strony: 571--581
• Opis fizyczny: Bibliogr. rys., tab., wz.

Twórcy

autor

Qiu H.

• College of Electric and Information Engineering Zhengzhou University of Light Industry Zhengzhou, Henan, China

autor

Fan X.

• College of Electric and Information Engineering Zhengzhou University of Light Industry Zhengzhou, Henan, China

autor

Yi R.

• College of Electric and Information Engineering Zhengzhou University of Light Industry Zhengzhou, Henan, China

autor

Feng J.

• College of Electric and Information Engineering Zhengzhou University of Light Industry Zhengzhou, Henan, China

autor

Wu J.

• College of Electric and Information Engineering Zhengzhou University of Light Industry Zhengzhou, Henan, China

autor

YANG C.

• College of Electric and Information Engineering Zhengzhou University of Light Industry Zhengzhou, Henan, China

autor

ZHAO H.

• College of Optoelectronic Engineering Chongqing University of Posts and Telecommunications Chongqing, China

Bibliografia

• [1] Garcia F.J., Uemori M.K.I., Rocha Echeverria J.J., Costa Bortoni E.D., Design Requirements of Generators Applied to Low-Head Hydro Power Plants, IEEE Transactions on Energy Conversion, vol. 30, no. 4, pp. 1630-1638(2015).
• [2] Wallin M., Bladh J., Lundin U., Damper Winding Influence on Unbalanced Magnetic Pull in Salient Pole Generators With Rotor Eccentricity, IEEE Transactions on Magnetics, vol. 49, no. 9, pp. 5158-5165 (2013).
• [3] Kurihara K., Effects of Damper Bars on Steady-State and Transient Performance of Interior Permanent-Magnet Synchronous Generators, IEEE Transactions on Industry Applications, vol. 49, no. 1, pp. 42-49 (2013).
• [4] Matsuki J., Taoka H., Hayashi Y., Iwamoto, S., Daikoku A., Improvement of three-phase unbalance due to connection of dispersed generator by damper windings of synchronous generator, Electrical Engineering in Japan, vol. 186, no. 1, pp. 43-50 (2014).
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• [7] Berry P.J., Hamdi E.S., An investigation into damper winding failure in a large synchronous motor, 50th International Universities Power Engineering Conference, UPEC 2015, Stoke-on-Trent, UK (2015).
• [8] Traxler-Samek G., Lugand T., Schwery A., Calculation of Power Losses in the Damper Winding of Large Hydrogenerators at Open-Circuit and Load Conditions, 2008 International Conference on Electrical Machines, Vilamoura, Portugal, pp. 1-6 (2008).
• [9] Yong L., ZhenNan F., Li H., LiDan X., Calculation and analysis of the loss and heat in damper bars in large tubular hydro-generator, Archives of Electrical Engineering, vol. 62, no. 1, pp. 43-54 (2013).
• [10] Traxler-Samek G., Lugand S., Schwery A., Add loss in the Damper Winding of Large Hydrogenerator at Open-Circuit and Load Conditions, IEEE Transactions on Industrial Electronics, vol. 57, no. 1, pp. 154-160 (2010).
• [11] Khan G.K.M., Buckley G.W., Bennett R.B., Brooks N., An Integrated Approach for the Calculation of Losses and Temperatures in the End-Region of Large Turbine Generators, IEEE Transactions on Energy Conversion, vol. 5, no. 1, pp. 183-194 (1990).
• [12] Likun W., Feiyang H., Weili L., Yihuang Z., Qing L., Yong L., Chunwei G., Influence of Metal Screen Materials on 3-D Electromagnetic Field and Eddy Current Loss in the End Region of Turbogenerator, IEEE Transactions on Magnetics, vol. 49, no. 2, pp. 939-945 (2013).
• [13] Waldhart F.J., Bacher J.P., Maier G., Modeling Eddy Current Losses in the Clamping Plate of Large Synchronous Generators using the Finite Element Method, International Symposium on Power Electronics, Electrical Drives, Automation and Motion, Sorrento, Italy, pp. 1468-1473 (2012)

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).