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This, paper proposes a dual-stator high temperature superconductor (HTS) reluctance-rotor brushless doubly-fed wind generator, which owns two stators and one salient reluctance rotor sandwiched between two stators. Two sets of windings with different pole-pairs locate on the two stators, separately, named as control winding and power winding. The modulation of reluctance rotor makes two sets of windings...
Large offshore direct-drive wind turbines of 10-MW power levels are being extensively proposed and studied because of a reduced cost of energy. Conventional permanent magnet generators currently dominating the direct-drive wind turbine market are still under consideration for such large wind turbines. In the meantime, superconducting generators (SCSGs) have been of particular interest to become a...
Large-scale superconducting direct-drive (SCDD) generators have received lots of attention in recent years, featuring high torque density, efficiency and reliability [1]. Due to the application of SC field windings, airgap flux density is large and often more than 2 Tesla (no more than 1 T in traditional machines), which could result in huge electromagnetic radial forces and vibrations in SCDD generators...
By adopting HTS tapes in the field winding, the hybrid HTS generator has the characteristics of high power density, high efficiency, low synchronous inductance, etc[1-3]. It is one of the most promising generators in the industry of wind power generation. Damping and screening system (DSS) is one of the key structures in this kind of generator. In order to achieve a better performance, the single...
High temperature superconductor (HTS) technology, which can provide a large electromotive force in a small area due to its larger current density than a normal conductor, can reduce the weight and loss of a generator, relative to a conventional machine. Moreover, once the HTS conductor has stabilized, the challenge of cooling the windings in large-scale generators can be resolved. Therefore, the technology...
A 10 MW class synchronous wind generator that has both the field and armature windings superconducting is presented. The field winding is assumed to be made of YBCO tapes while multifila-ment MgB2 wires are considered for the armature winding. The proposed design is analyzed using a 3-D finite element based on simulation tool MAXWELL 14.0. The magnetic flux distribution figure of the proposed model...
In this paper, the performance analysis of a 10 MW class high temperature superconducting (HTS) synchronous generator for wind turbines applications is discussed. The proposed generator using HTS excitation field winding is modeled and simulated under full load condition. Also, the losses of the generator especially iron losses and copper losses using analytical and finite element method (FEM) calculations...
Wind power generation facilities have been installed in the world. Recently offshore wind energy attracts greater attention, and development of wind turbine generators of higher power rating becomes more important. Superconducting technologies is expected to be applied to over 10 MW class generators. We have studied 10 MW class large wind turbine generators using superconducting technologies. The...
This paper discusses the transient performance of a high-temperature-superconducting (HTS) synchronous generator. The transients of interest include those which are initiated during the course of normal operation, e.g. the sudden removal of a portion of the system load, as well as those which result from fault conditions, e.g. a three-phase terminal short circuit. In power-system terms, a shipboard...
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