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Journal of Zhejiang University SCIENCE A 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/jzus.A2300449


Design of a 35-kV high-temperature superconducting synchronous machine with optimized field winding


Author(s):  Chao LUO, Bowen XU, Jien MA, Jiancheng ZHANG, Jiabo SHOU, Youtong FANG

Affiliation(s):  College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   majien@zju.edu.cn

Key Words:  High voltage stator-cable windings, superconducting machines, inverted trapezoidal field winding, total harmonic distortion


Chao LUO, Bowen XU, Jien MA, Jiancheng ZHANG, Jiabo SHOU, Youtong FANG. Design of a 35-kV high-temperature superconducting synchronous machine with optimized field winding[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .

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doi="10.1631/jzus.A2300449"
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%A Jiancheng ZHANG
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%A Youtong FANG
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T1 - Design of a 35-kV high-temperature superconducting synchronous machine with optimized field winding
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A1 - Bowen XU
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A1 - Jiabo SHOU
A1 - Youtong FANG
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2300449


Abstract: 
This paper proposes the application of high-voltage stator-cable windings in superconducting machines, based on the characteristics of strong magnetic fields and large air gaps. Cross-linked polyethylene cable winding can be employed to achieve a rated voltage of 35 kV in DC-field superconducting machines, thereby enabling a direct connection between the superconducting machine and the power grid, eliminating the need for transformers. We first, through finite-element analysis, demonstrate that the proposed high-voltage high-temperature superconducting machine not only meets the requirement of a 35-kV rated voltage, but also exhibits minimal flux leakage, torque fluctuation, and harmonic distortion. We then compare three candidate Types to discuss the tradeoff between the multi-group superconducting field winding arrangement and machine performances. We propose inverted trapezoidal superconducting field winding as a promising candidate, because it has minimal superconductivity material usage, the largest safety margin for the superconducting coils (SC), low thrust ripple, and low total harmonic distortion with the desired 35-kV-rated voltage. Finally, through large-scale design parameter sweeping, we show how we selected the optimal parameters for field winding and validated them by the finite-element method.

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