Review of Superconducting Generator Topologies for Direct-Drive Wind Turbines

Qu, Ronghai; Liu, Yingzhen; Wang, Jin

doi:10.1109/tasc.2013.2241387

Cited by 79 publications

(11 citation statements)

References 52 publications

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“…First, two acrylic boards with a thickness of 4 mm and width of 2.5 cm were fabricated by laser cutting technique and selected as the substrate material, and the length was altered (16,20,24,28, and 32 cm) to match the varied electrode sizes. In each acrylic board, a groove (12.5 × 4 mm 2 ) was created in the middle, so that two acrylic plates could be bonded together to form a cross-framework.…”

Section: Fabrication Of Tengmentioning

confidence: 99%

“…During the last decades, conventional wind turbine generators have been extensively used for converting wind energy into electricity based on the mechanism of electromagnetic induction [13,14]. Nevertheless, the disadvantages of cumbersome structure, high manufacturing cost, and installation height of more than 40 meters [15,16] severely restrict the widespread application of traditional wind turbine generators [17,18]. Therefore, it is more and more urgent to develop alternative approaches for wind energy harvesting with a lower cost, easier maintaining, and higher efficiency in ordinary environments.…”

Section: Introductionmentioning

confidence: 99%

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An Ultra-Durable Windmill-Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low-Speed Wind Energy

Zhang

Zeng

et al. 2020

Nano-Micro Lett.

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HIGHLIGHTS • A novel windmill-like hybrid nanogenerator with contact-separation structure was proposed for harvesting breeze energy at low wind speed. • A spring steel sheet was creatively used both as an electrode of triboelectric nanogenerator and a booster for contact-separation activity. • A magnetic acting as a bifunctional element supplies magnetic flux variation in electromagnetic generator and overcomes electrostatic adsorption between tribolayers simultaneously.

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Section: Fabrication Of Tengmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Ultra-Durable Windmill-Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low-Speed Wind Energy

Zhang

Zeng

et al. 2020

Nano-Micro Lett.

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“…These systems require huge amounts of cryogenic fluids, such as LN 2 , GHe or LNe, and very complex cryostats and cooling circuits. Complex rotary joints can also be required to exchange huge amounts of cryogen liquids between stationary and rotating parts [12]. SCGs based on LTS wires, such as NbTi, require very low operating temperatures, in the range of 1.8-4.2 K.Therefore,the efficiency of the cooling cycle working at such temperatures is very low, in the range of 0.3%.…”

Section: Superconducting Wind Generatorsmentioning

confidence: 99%

Lightweight MgB₂superconducting 10 MW wind generator

Marino

Pujana

Sarmiento

et al. 2015

Supercond. Sci. Technol.

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The offshore wind market demands a higher power rate and more reliable turbines in order to optimize capital and operational costs. The state-of-the-art shows that both geared and direct-drive conventional generators are difficult to scale up to 10 MW and beyond due to their huge size and weight. Superconducting direct-drive wind generators are considered a promising solution to achieve lighter weight machines. This work presents an innovative 10 MW 8.1 rpm direct-drive partial superconducting generator using MgB2 wire for the field coils. It has a warm iron rotor configuration with the superconducting coils working at 20 K while the rotor core and the armature are at ambient temperature. A cooling system based on cryocoolers installed in the rotor extracts the heat from the superconducting coils by conduction. The generator’s main parameters are compared against a permanent magnet reference machine, showing a significant weight and size reduction. The 10 MW superconducting generator concept will be experimentally validated with a small-scale magnetic machine, which has innovative components such as superconducting coils, modular cryostats and cooling systems, and will have similar size and characteristics as the 10 MW generator.

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“…Since its discovery in 1911, superconducting materials have been widely used in many technological areas, such as high magnetic field magnets [1,2], electric machines [3], power transmission lines [4], energy storage systems [5,6], etc. Among these, single grain REBa 2 Cu 3 O 7-δ (REBCO) bulk high temperature superconductors, which can trap magnetic fields up to 17.6 T at 26 K [2], have demonstrated significant potential for use in a variety of engineering applications [7].…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling and simulations on the mechanical failure of bulk superconductors during magnetization: based on the phase-field method

Jing

2020

Supercond. Sci. Technol.

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Mechanical failure is one of the most significant challenges for the application of bulk superconductors acting as trapped field magnets. In this paper, a numerical simulation framework based on the coupled H-formulation for electromagnetics of superconductors and the phase-field fracture model for solids is proposed and implemented to simulate the crack nucleation and propagation within bulk superconductors during the magnetization process. The thermal stress due to cool down and the huge Lorentz force during the magnetization process are considered in the simulation. The magnetic field, current density and stress/strain field distribution, and the crack initiation and propagation within the homogeneous and inhomogeneous bulk sample under high magnetic field are numerically simulated, respectively. The trapped magnetic fields for the bulk superconductors under different magnetic fields are obtained numerically. In addition, the influences of microstructures such as voids, pre-existing microcracks on the trapped magnetic field of the bulk superconductor are also investigated and presented, which demonstrate the flexibility of the proposed framework to investigate the mechanical failure of bulk superconductors.

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Review of Superconducting Generator Topologies for Direct-Drive Wind Turbines

Cited by 79 publications

References 52 publications

An Ultra-Durable Windmill-Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low-Speed Wind Energy

An Ultra-Durable Windmill-Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low-Speed Wind Energy

Lightweight MgB₂superconducting 10 MW wind generator

Numerical modelling and simulations on the mechanical failure of bulk superconductors during magnetization: based on the phase-field method

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Review of Superconducting Generator Topologies for Direct-Drive Wind Turbines

Cited by 79 publications

References 52 publications

An Ultra-Durable Windmill-Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low-Speed Wind Energy

An Ultra-Durable Windmill-Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low-Speed Wind Energy

Lightweight MgB2superconducting 10 MW wind generator

Numerical modelling and simulations on the mechanical failure of bulk superconductors during magnetization: based on the phase-field method

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Lightweight MgB₂superconducting 10 MW wind generator