Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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A parameter sweep approach for first-cut design of 5 MW Ship propulsion motor

  • Bong, Uijong (Department of Electrical and Computer Engineering, Seoul National University) ;
  • An, Soobin (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Im, Chaemin (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Kim, Jaemin (Department of Electrical and Computer Engineering, Seoul National University) ;
  • Hahn, Seungyong (Department of Electrical and Computer Engineering, Seoul National University)
  • Received : 2019.02.15
  • Accepted : 2019.03.15
  • Published : 2019.03.31
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Abstract

This paper presents a conceptual design approach of air-cored synchronous machine with high temperature superconductor (HTS) field winding. With a given configuration of a target machine, boundary conditions are set in the cylindrical coordinate system and analytic field calculation is performed by solving a governing equation. To set proper boundary conditions, current distributions of the field winding and the armature winding are expressed by the Fourier expansion. Based on analytic magnetic field calculation results, key machine parameters are calculated: 1) inductance, 2) critical current of field winding, 3) weight, 4) HTS conductor consumption, and 5) efficiency. To investigate all potential design options, 6 sweeping parameters are determined to characterize the geometry of the machine and the parameter calculation process is performed for each design options. Among design options satisfying constraints including >80 % critical current margin and >95 % efficiency, in this paper, a first-cut design was selected in terms of overall machine weight and HTS conductor consumption to obtain a lightweight and economical design. The goal is to design a 5-MW machine by referring to the same capacity machine that was previously constructed by another group. Our design output is compared with finite element method (FEM) simulation to validate our design approach.

Keywords

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Fig. 1. A design flow chart of parameter sweep approach for first-cut design of HTS synchronous machine. Parameter calculation based on analytic field solution is iteratively performed for each sweeping parameter sets.

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Fig. 2. Two-dimensional schematic of simplified air-cored synchronous machine with the definition of 6 sweeping parameters. Radial and azimuthal position ( R , θ ) of each components are represented in cylindrical coordinates. Only one pole of the full model is presented based on the symmetry of the machine.

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Fig. 3. Azimuthal distribution of one line current of field coil in one pole-pair determined by sweeping parameters a1 and a2 satisfying the equation: a1 + a2 + a3 = 1 . x - axis represents electrical angle and y -axis represents magnitude of linear current density of one line current.

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Fig. 4. Two-dimensional schematic when only one current sheet is presented. The schematic is divided into 4 regions according to the position of selected line current and permeability of materials (𝜇).

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Fig. 5. Conceptual design results of the parameter sweep for the 5-MW ship propulsion motor represented as scattered plot: (a) the first parameter sweep for wide design investigation; (b) the second parameter sweep for detailed design investigation. For both graphs, the x-axis shows the required HTS conductor, while y -axis the calculated weight.

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Fig. 7. Azimuthal distribution of radial component of magnetic field at (a) the field coil and (b) the armature coil calculated by analytic method and FEM. The x -axis represents the azimuthal electric angle while the y-axis Br.

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Fig. 6. (a) FEM model for designed 5-MW ship propulsion motor and (b) its magnetic field distribution shown in 1/6th model when field coils are fully excited at the rated current of 120 A.

TABLE I ANALYTIC SOLUTIONS AND BOUNDARY CONDITIONS WITH A CURRENT SHEET.

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TABLE II INITIAL PARAMETERS FOR 5-MW SHIP PROPULSION MOTOR DESIGN.

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TABLE III SWEEPING PARAMETERS FOR 5-MW SHIP PROPULSION MOTOR DESIGN.

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TABLE IV KEY PARAMETERS OF 5-MW SHIP PROPULSION MOTOR.

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References

  1. S. S. Kalsi, K. Weeber, H. Takesue, C. Lewis, H.-W. Neumueller, and R. D. Blaugher, "Development status of rotating machines employing superconducting field windings," Proc. IEEE, vol. 92, no. 10, pp. 1688-1704, 2004. https://doi.org/10.1109/JPROC.2004.833676
  2. T. Yanamoto, M. Izumi, M. Yokoyama, and K. Umemoto, "Electric propulsion motor development for commercial ships in Japan," Proc. IEEE, vol. 103, no. 12, pp. 2333-2343, 2015. https://doi.org/10.1109/JPROC.2015.2495134
  3. G. Snitchler, B. Gamble, and S. S. Kalsi, "The performance of a 5 MW high temperature superconductor ship propulsion motor," IEEE Trans. Appl. Supercond., vol. 15, no. 2, pp. 2206-2209, 2005. https://doi.org/10.1109/TASC.2005.849613
  4. K. Umemoto, K. Aizawa, M. Yokoyama, K. Yoshikawa, Y. Kimura, M. Izumi, K. Ohashi, M. Numano, K. Okumura, M. Yamaguchi et al., "Development of 1 MW-class HTS motor for podded ship propulsion system," in J. Phys. Conf. Ser., vol. 234, no. 3, IOP Publishing, 2010, p. 032060. https://doi.org/10.1088/1742-6596/234/3/032060
  5. P. N. Barnes, M. D. Sumption, and G. L. Rhoads, "Review of high power density superconducting generators: Present state and prospects for incorporating YBCO windings," Cryogenics, vol. 45, no. 10-11, pp. 670-686, 2005. https://doi.org/10.1016/j.cryogenics.2005.09.001
  6. K. S. Haran, S. Kalsi, T. Arndt, H. Karmaker, R. Badcock, B. Buckley, T. Haugan, M. Izumi, D. Loder, J. W. Bray et al., "High power density superconducting rotating machines-Development status and technology roadmap," Supercond. Sci. Technol., vol. 30, no. 12, p. 123002, 2017. https://doi.org/10.1088/1361-6668/aa833e
  7. S. Fukui, J. Ogawa, T. Sato, O. Tsukamoto, N. Kashima, and S. Nagaya, " Study of 10 MW-class wind turbine synchronous generators with HTS field windings," IEEE Trans. Appl. Supercond., vol. 21, no. 3, p. 1151, 2011. https://doi.org/10.1109/TASC.2010.2090115
  8. S. Fukui, T. Kawai, M. Takahashi, J. Ogawa, T. Oka, T. Sato, and O. Tsukamoto, "Numerical study of optimization design of high tem- perature superconducting field winding in 20 MW synchronous motor for ship propulsion," IEEE Trans. Appl. Supercond., vol. 22, no. 3, p. 5200504, 2012. https://doi.org/10.1109/TASC.2012.2183331
  9. A. B. Abrahamsen, N. Mijatovic, E. Seiler, T. Zirngibl, C. Traeholt, P. B. NOrgard, N. F. Pedersen, N. H. Andersen, and J. Ostergaard, " Superconducting wind turbine generators," Supercond. Sci. Technol., vol. 23, no. 3, p. 034019, 2010. https://doi.org/10.1088/0953-2048/23/3/034019
  10. G. Snitchler, B. Gamble, C. King, and P. Winn, "10 MW class superconductor wind turbine generators," IEEE Trans. on Appl. Supercond., vol. 21, no. 3, pp. 1089-1092, 2011. https://doi.org/10.1109/TASC.2010.2100341
  11. R. Qu, Y. Liu, and J. Wang, "Review of superconducting generator topologies for direct-drive wind turbines," IEEE Trans. Appl. Supercond., vol. 23, no. 3, p. 5201108, 2013. https://doi.org/10.1109/TASC.2013.2241387
  12. Y. Terao, M. Sekino, and H. Ohsaki, "Comparison of conventional and superconducting generator concepts for offshore wind turbines," IEEE Trans. on Appl. Supercond., vol. 23, no. 3, p. 5200904, 2013. https://doi.org/10.1109/TASC.2012.2237223
  13. T. Miller and A. Hughes, "Comparative design and performance analysis of air-cored and iron-cored synchronous machines," in Proc. Inst. Electr. Eng., vol. 124, no. 2, IET, 1977, pp. 127-132. https://doi.org/10.1049/piee.1977.0022
  14. Y. Liu, R. Qu, and J. Wang, "Comparative analysis on superconducting direct-drive wind generators with iron teeth and air-gap winding," IEEE Trans. on Appl. Supercond., vol. 24, no. 3, pp. 1-5, 2014. https://doi.org/10.1109/TASC.2014.2357499
  15. B. Gamble, G. Snitchler, and S. S. Kalsi, "HTS generator topologies," in Power Engineering Society General Meeting, IEEE, 2006, p. 5.
  16. J. Frauenhofer, J. Grundmann, G. Klaus, and W. Nick, "Basic concepts, status, opportunities, and challenges of electrical machines utilizing High-Temperature Superconducting (HTS) windings," in J. Phys. Conf. Ser., vol. 97, no. 1, IOP Publishing, 2008, p. 012189.
  17. S. S. Kalsi, "Applications of high temperature superconductors to electric power equipment," John Wiley & Sons, 2011.
  18. A. Hughes and T. Miller, "Analysis of fields and inductances in aircored and iron-cored synchronous machines," in Proc. Inst. Electr. Eng., vol. 124, no. 2, IET, 1977, pp. 121-126. https://doi.org/10.1049/piee.1977.0021
  19. A. B. Abrahamsen, N. Mijatovic, E. Seiler, M. Sorensen, M. Koch, P. Norgard, N. F. Pedersen, C. Traholt, N. H. Andersen, and J. Ostergard, "Design study of 10 kW superconducting generator for wind turbine applications," IEEE Trans. on Appl. Supercond., vol. 19, no. 3, pp. 1678-1682, 2009. https://doi.org/10.1109/TASC.2009.2017697
  20. H. Jang, I. Muta, T. Hoshino, T. Nakamura, S. Kim, M. Sohn, Y. Kwon, and K. Ryu, "Conceptual design of 100 HP synchronous motor with HTS field winding," in Proc. Int. Conf. Elect. Eng. Japan, 2002, pp. 1618-1628.
  21. N. Mijatovic, A. B. Abrahamsen, C. Traeholt, E. Seiler, M. Henriksen, V. Rodriguez-Zermeno, and N. F. Pedersen, "Superconducting generators for wind turbines: Design considerations," in J. Phys. Conf. Ser., vol. 234, no. 3, IOP Publishing, 2010, p. 032038. https://doi.org/10.1088/1742-6596/234/3/032038
  22. U. Bong, S. An, J. Voccio, J. Kim, Y.-G. Kim, K. J. Han, H. Lee, and S. Hahn, "A Design Study on MW-class Synchronous Motor with No-Insulation HTS Field Winding," IEEE Trans. on Appl. Supercond., Manuscript accepted for publication.
  23. H. Moon, Y.-C. Kim, H.-J. Park, I.-K. Yu, and M. Park, "An introduction to the design and fabrication progress of a megawatt class 2G HTS motor for the ship propulsion application," Supercond. Sci. Technol., vol. 29, no. 3, p. 034009, 2016. https://doi.org/10.1088/0953-2048/29/3/034009
  24. H. Moon, Y.-C. Kim, H.-J. Park, M. Park, and I.-K. Yu, "Development of a MW-class 2G HTS ship propulsion motor," IEEE Trans. Appl. Supercond., vol. 26, no. 4, pp. 1-5, 2016.
  25. B. Gamble, G. Snitchler, and T. MacDonald, "Full power test of a 36.5 MW HTS propulsion motor," IEEE Trans. Appl. Supercond., vol. 21, no. 3, pp. 1083-1088, 2011. https://doi.org/10.1109/TASC.2010.2093854
  26. D. Hu, J. Zou, T. J. Flack, X. Xu, H. Feng, and M. D. Ainslie, "Analysis of fields in an air-cored superconducting synchronous motor with an HTS racetrack field winding," arXiv preprint arXiv:1305.3815, 2013.
  27. D. K. Cheng et al., "Field and wave electromagnetics," Pearson Education India, 1989.
  28. Y. Lee, N. Nakamura, T. Komagome, K. Mizuno, M. Ogata, and K. Nagashima, "In-field performances of commercial REBCO tapes below liquid nitrogen temperatures," Physica C, vol. 495, pp. 141-145, 2013. https://doi.org/10.1016/j.physc.2013.09.002
  29. C. Senatore, C. Barth, M. Bonura, M. Kulich, and G. Mondonico, "Field and temperature scaling of the critical current density in commercial REBCO coated conductors," Supercond. Sci. Technol., vol. 29, no. 1, p. 014002, 2015. https://doi.org/10.1088/0953-2048/29/1/014002
  30. D. Hilton, A. Gavrilin, and U. Trociewitz, "Practical fit functions for transport critical current versus field magnitude and angle data from (RE) BCO coated conductors at fixed low temperatures and in high magnetic fields," Supercond. Sci. Technol., vol. 28, no. 7, p. 074002, 2014. https://doi.org/10.1088/0953-2048/28/7/074002