Title :
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
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2013.2288496
