Conceptual Design of the Cryogenic System for a 12 MW Superconducting Wind Turbine Generator

Author

Jie He ; Yuejin Tang ; Jingdong Li ; Li Ren ; Jing Shi ; Jin Wang ; Ronghai Qu ; Lushun Su ; Xiaoyu Li ; Ying Xu ; Zhe Zhu

Author_Institution

State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol. (HUST), Wuhan, China

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

5

Abstract

A direct drive 12-MW superconducting wind turbine generator has been designed. The rotor of the generator is made of low temperature superconductor (LTS) coils, which are wound from NbTi/Cu cable-in-conduit conductors (CICC) cooled with forced flow supercritical helium at 4 K. To ensure the stability of the generator rotor, it is necessary to design a reliable cryogenic system. With consideration of the radiation heat loads, ac loss, conduction heat leak by residual gas, current leads and torque tube, the heat load of the cryogenic system is analyzed. Aiming at decreasing the heat load of the cryogenic system and enhancing the overall efficiency of the generator, new structures of torque tube and thermal shields are proposed, and the main parameters of the cryogenic system are determined.

Keywords

cryogenics; drives; electric generators; rotors; superconducting cables; superconducting coils; wind turbines; AC loss; LTS coils; NbTi-Cu; cable-in-conduit conductors; conceptual design; conduction heat leakage; cryogenic system; current leads; direct drive superconducting wind turbine generator; forced flow supercritical helium; generator rotor stability; low temperature superconductor coils; power 12 MW; radiation heat loads; residual gas; temperature 4 K; thermal shields; torque tube; Coils; Cryogenics; Electron tubes; Generators; Heating; Helium; Torque; CICC; LTS coils; cryogenic system; generator; torque tube;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2288496

Filename

6654244