An Approach to the Design and the Interactions of a Fully Superconducting Synchronous Generator and Its Power Converter

Lengsfeld, Sebastian; Sprunck, Sebastian; Frank, Simon Robin; Jung, Marco; Hiller, Marc; Bernd, Ponick; Mersche, Stefan

doi:10.3390/en15103751

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…The techno-economic models of the described tool are currently being amended in order to assess the influence on LCOE of a fully super-conducting generator system design for large offshore wind turbines [20], featuring low mass at the cost of high technological complexity.…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

Assessing the influence of lightweight generators on substructure cost and levelized cost of energy: a techno-economic model for large offshore wind turbines

Thalemann

2023

Forsch Ingenieurwes

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It is expected that lightweight drive train systems for large wind turbines can reduce overall levelized cost of energy (LCOE) compared to conventional designs, particularly through a less robust and therefore lower-cost turbine substructure. Representing a major share of drive train mass, the focus of mass reduction efforts concentrate on the generator. In order to assess the influence of specific lightweight generator designs on overall LCOE, a techno-economic software tool was created which feeds generator mass into the LCOE calculation through the design and capital expenditure (CAPEX) calculation of an appropriate wind turbine substructure. A case study was carried out, comparing a direct drive design featuring a permanent magnet generator with ring architecture and large diameter—resulting in significantly low mass and low CAPEX—to a reference turbine with conventional drive train design. The results show that a relevant LCOE reduction could be achieved, but generator mass reduction and substructure mass and consequently CAPEX reduction are highly disproportionate due to technical substructure design constraints. It is indicated that the assessed lightweight design has a high potential to economize on lightweight design decisions to reduce its CAPEX and in consequence overall LCOE even further.

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Section: Conclusion and Prospectsmentioning

confidence: 99%

Assessing the influence of lightweight generators on substructure cost and levelized cost of energy: a techno-economic model for large offshore wind turbines

Thalemann

2023

Forsch Ingenieurwes

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Rapid optical switching of latched electrical resistance in a high-T c superconducting tape

Brooks,

Francis,

Bioletti

et al. 2024

Journal of Applied Physics

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We report microsecond timescale switching between the superconducting and normal states of commercially manufactured high-Tc superconducting wires using optical radiation to heat the conductor above Tc. The achieved voltages and switching times have significant implications for a new class of thermal switches. The report contains experimental data for photo-induced microsecond scale voltage transients as well as numerical analysis of heat propagation through the material in response to optical radiation. The microbridges are etched into commercially manufactured coated conductors and submerged in liquid nitrogen. By varying the magnitude of the transport current, two different optical responses are identified. At low transport currents, short-lived voltage transients occur, transitioning to persistent latching once the current is increased above a threshold value. The microbridge, therefore, behaves as a fast opening and closing switch when carrying low currents or an optically latched thyristor at high currents. This is understood to occur due to critical current suppression as a result of heating from the optical pulse. Optically induced heating reduces the superconducting volume fraction, and Joule heating due to the transport current interaction with the high temperature superconducting occurs, which either causes short-lived or stable self-heating normal regions dependent on the magnitude of the transport current. This study is concluded with an estimate of the energy necessary to drive the microbridge into the resistive state. The observed behavior can potentially be utilized as a switching element in superconducting transformer rectifiers where high frequency switch operation is required.

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Fully Automated Wide Temperature Range Semiconductor Characterization

Frank,

Hansel,

Bitterle

et al. 2023

2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe)

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New measurement point Waveforms loading and pre-processingWaveform smoothing Current offset and skew correction DC link voltage determination Turn-on analysisDetermine integration borders Calculate turn-on energy Calculate dv/dt and di/dt Calculate imax and umax Calculate commutation time . Static analysis Voltage offset correction Determine investigation borders Calculate output characteristics Optional: curve combination . Save data to result file Turn-off analysis Determine integration borders Calculate turn-off energy Calculate dv/dt and di/dt Calculate imax and umax Calculate commutation time

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An Approach to the Design and the Interactions of a Fully Superconducting Synchronous Generator and Its Power Converter

Cited by 4 publications

References 31 publications

Assessing the influence of lightweight generators on substructure cost and levelized cost of energy: a techno-economic model for large offshore wind turbines

Assessing the influence of lightweight generators on substructure cost and levelized cost of energy: a techno-economic model for large offshore wind turbines

Rapid optical switching of latched electrical resistance in a high-T c superconducting tape

Fully Automated Wide Temperature Range Semiconductor Characterization

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