Potential Performance of Fully Superconducting Generators for Large Direct-Drive Wind Turbines

被引:2
作者
Liu, Dong [1 ,2 ]
Salmi, Tiina
Lin, Jiaxi [3 ]
机构
[1] Tampere Univ, Unit Elect Engn, Tampere, Finland
[2] LUT Univ, Sch Energy Syst, FI-15210 Lahti, Finland
[3] Hohai Univ, Nanjing CN-211100, Peoples R China
基金
芬兰科学院;
关键词
Generators; Windings; Superconducting magnets; Torque; Reactive power; Voltage control; Loading; Armature winding; control; fully superconducting generator; synchronous machine; wind turbine;
D O I
10.1109/TASC.2023.3255826
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Fully superconducting generators (FSCGs) for wind turbine applications are usually synchronous machines. A high torque density should be obtained by increasing both the main field and the armature current loading. However, there are tendencies that the main field can be low but the armature current loading can be high, such as permanent magnet superconducting generators. Despite J(c)(B, T ) characteristics and AC loss issues, simply using superconducting armature may not lead to a desired design result but deteriorate the performance with high armature reaction. This paper implements the vector-phasor diagram of non-salient synchronous generators for revealing the potential performance of only increasing the armature current loading. Three commonly used control strategies are compared. The results show that increasing the armature-field flux to a certain level will deteriorate the generator performance with all three control strategies. Comparatively, the voltage control for equaling EMF and voltage amplitudes provides the best overall performance: high torque production capability, high power factor, small power angle and a wide range of armature current loading. The results obtained from the vector-phasor diagrams are verified by finite element models with an FSCG design.
引用
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页数:5
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