http://iet.metastore.ingenta.com
1887

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

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

For access to this article, please select a purchase option:

Buy article PDF
$19.95
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
IET Science, Measurement & Technology — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

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.

References

    1. 1)
      • 1. Xu, S.C., Wu, Z.T.: ‘A new transposition technique of the stator bars of large generators (I)’, Large Electr. Mach. Hydraulic Turbine, 1992, 1992, (1), pp. 15.
    2. 2)
    3. 3)
    4. 4)
      • 4. Reddy, P.B., Jahns, T.M., Bohn, T.P.: ‘Transposition effects on bundle proximity losses in high-speed PM machines’. IEEE Energy Conversion Congress and Exposition, San Jose, USA, September 2009, pp. 19191926.
    5. 5)
    6. 6)
    7. 7)
    8. 8)
    9. 9)
      • 9. Xu, C.Q., Luo, R.J.: ‘Circulating current and transposition of the stator bars of large generators’, Large Electr. Mach. Hydraulic Turbine, 1986, 1986, (3), pp. 1522.
    10. 10)
      • 10. Han, L., Shi, X.K., Guo, N.: ‘New methods for the stator bar transpositions of hydrogenerators’, Large Electr. Mach. Hydraulic Turbine, 2009, 2009, (3), pp. 15.
    11. 11)
      • 11. Liang, Y.P., Sun, Y., Sun, Y.T.: ‘Calculation and analysis on circulating current losses in the stator bar strands of a 1000 MW hydro-generator’, Electr. Mach. Control, 2011, 15, (7), pp. 6570.
    12. 12)
      • 12. Guo, N., Han, L., Shi, X.K.: ‘Analysis and comparison of four transposition methods in the stator bar of hydrogenerator’, J. Chongqing Univ., 2007, 30, (2), pp. 4245.
    13. 13)
      • 13. Jiang, K.X., Han, L.: ‘Calculation and analysis on stator bar transposition of hydro-generator of tian ba qi’, Dong Fang Electr. Mach., 1995, 1995, (2), pp. 2330.
    14. 14)
      • 14. Du, C.X., Gui, W.H., Zhou, G.H.: ‘Excessive losses and temperature field calculation of stator coil bars in air-cooled large hydro-generators’, Proc. CSEE, 2012, 32, (12), pp. 111119.
    15. 15)
    16. 16)
      • 16. Tang, R.Y., Xu, G.R., Tian, L.J., Zhao, D.Q., Xu, Y.: ‘Calculation of end region magnetic field and circuit equations method’, IEEE Trans. Magn., 1990, 26, (2), pp. 496500.
    17. 17)
      • 17. Hattori, K., Id, K., Takahashi, K., Kobashi, K., Okabe, H., Watanabe, T.: ‘Performance assessment study of a 250MVA air-cooled turbo generator’. IEEE Int. Conf. Generators and Drives, Madison, USA, June 2003, pp. 124128.
    18. 18)
      • 18. Guo, Y.G., Wang, X.F., Zhu, J.G., Ramsden, V.S.: ‘Analysis of circulating currents among the stator bar strands of large turbine-generators’, J. Huazhong Univ. Sci. Technol., 2000, 28, (4), pp. 8386.
    19. 19)
      • 19. Xu, C.Q., Luo, R.J.: ‘Circulating current temperature rise and transposition way of the stator bars of large hydro-generator’, Large Electr. Mach. Hydraulic Turbine, 1985, 1985, (2), pp. 12.
    20. 20)
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-smt.2014.0230
Loading

Related content

content/journals/10.1049/iet-smt.2014.0230
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
This is a required field
Please enter a valid email address