Survey on High-Temperature Superconducting Transformer Windings Design

Moradnouri, Ahmad; Ardeshiri, Ali; Vakilian, Mehdi; Hekmati, Arsalan; Fardmanesh, Mehdi

doi:10.1007/s10948-020-05539-6

Cited by 20 publications

(10 citation statements)

References 97 publications

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“…The advantages of this type include minimal AC losses; reduces deviation of the leakage magnetic field, which improves the characteristics of HTS wires. In addition, this type of windings is ideal for the design of a transformer with a current limiting function [4], [25]. The windings of our experimental transformer are made of a 2G HTS tapes.…”

Section: Windingsmentioning

confidence: 99%

Methodology for determining the parameters of high-temperature superconducting power transformers with current limiting function

Manusov

Ivanov²,

Semenov³

et al. 2023

IJECE

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<span lang="EN-US">This paper substantiates a new adaptive method for determining parameters of high-temperature superconducting power transformers with current limiting function. The main focus is the design of current-limiting superconducting windings in the light of new restrictions on current density, magnetic induction, critical current and critical temperature. The presented method considers the nature of alternating current (AC) losses in a superconductor under nominal operating conditions, features of the dielectric medium (liquid nitrogen), as well as the reduced values of the short-circuit voltage (0.5 to 1.5%). The main design features of high-temperature superconducting (HTS) transformers are specified, and a prototype of a three-phase HTS transformer of 63 kVA with a short-circuit current limiting function is developed. It is shown that HTS units have some advantages over conventional transformers: a 90 to 95% active losses reduction, short-circuit current limitation function, explosion and fire safety, a 60% reduction in weight and size, and increased efficiency (up to 99.8%). Experimental studies confirm that the short-circuit current limitation function is safe and efficient. It is demonstrated that during the short-circuit current limitation, significant heat flows occur on the windings, which should not exceed the critical value above which the superconductor could not return to the superconducting state by itself.</span>

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Section: Windingsmentioning

confidence: 99%

Methodology for determining the parameters of high-temperature superconducting power transformers with current limiting function

Manusov

Ivanov²,

Semenov³

et al. 2023

IJECE

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show abstract

“…Martin Weides has done some research on HTS circuits [11]. However, in order to ensure the safety of insulation, the superconducting transformer developed at present has not developed towards compactness [12][13][14] due to the lack of insulation data for the design of compact HTS transformer. The internal insulation size of the compact superconducting transformer is small, so it is necessary to improve the insulation strength of the transformer to ensure its insulation safety.…”

Section: Introductionmentioning

confidence: 99%

Insulation characteristics of polyimide film used in liquid nitrogen of compact HTS transformers

Zhou,

Xiao,

Bian

et al. 2024

IET Generation Trans & Dist

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Since compact high temperature superconducting (HTS) transformer has a small size and high efficiency, it can meet the requirements of high‐voltage transformers for vehicle‐mounted mobile substation. However, due to the small internal insulation size of the compact HTS transformers, it is necessary to improve the insulation strength to ensure the insulation safety of the transformer. Reasonable main insulation structure can greatly improve the insulation level of transformer. Based on the design theory of main insulation structure, this paper designs a main insulation structure model “small liquid nitrogen gap—barrier” suitable for compact HTS transformer. The insulation withstand voltage experiment of the main insulation structure shows that when the liquid nitrogen gap distance is less than 8 mm, the insulation strength of liquid nitrogen in the structure is improved. When the liquid nitrogen gap distance is too small, the size and thickness of the barrier will affect the insulation strength of the structure. According to the insulation strength of main insulation structures with different liquid nitrogen gaps, the feasibility of “small liquid nitrogen gap—barrier” main insulation structure is verified. The small liquid nitrogen gap structure can be adopted for the main insulation of compact HTS transformer.

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“…At present, benefited from the unique advantages of zero energy loss, high current density and compact device size, a great number of theoretical and experimental studies have done regarding superconducting coils/magnets (also can be regarded as power inductors). Prototypes have been investigated and used into large-scale power and energy systems such as superconducting magnetic energy storage [8], superconducting fault current limiter [9], superconducting power transformer [10], superconducting magnetic resonance imaging [11] and superconducting nuclear fusion [12], where the operating environments are with DC or relatively low frequencies such as 50/60 Hz. However, these large-scale superconducting inductors require fairly high capital cost and relatively large installation dimension.…”

Section: Introductionmentioning

confidence: 99%

An ultra‐low‐loss superconducting inductor for power electronic circuits

Chen

Gou

Chen

et al. 2022

IET Power Electronics

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To break through the bottlenecks of the loss and size of conventional conductors and magnetic materials, replacing copper inductors by zero‐resistance superconducting inductors can be a promising solution. The experimental, theoretical and numerical investigations into the loss characteristics of an air‐core superconducting inductor have been carried out. All these results show that the loss from a superconducting inductor in the boost chopper circuit was reduced remarkably up to 373 times smaller than the loss from the magnetic‐core copper inductor having the same conditions. Moreover, the actual volume and weight of the superconducting inductor are only 5.61% and 10.97% of those of the copper inductor having the same inductance and current capacities. Advanced numerical models have been built to verify the experiments that their results of superconducting losses as well as the current and frequency dependencies are well matched. A compact, low‐loss and low‐cost cryostat has been designed to accommodate the superconducting inductor, which can further improve the practicability for superconducting inductor to be equipped into various power electronic applications. The superconducting inductor can lead power electronic devices towards ultra‐high‐efficiency power conversion.

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Survey on High-Temperature Superconducting Transformer Windings Design

Cited by 20 publications

References 97 publications

Methodology for determining the parameters of high-temperature superconducting power transformers with current limiting function

Methodology for determining the parameters of high-temperature superconducting power transformers with current limiting function

Insulation characteristics of polyimide film used in liquid nitrogen of compact HTS transformers

An ultra‐low‐loss superconducting inductor for power electronic circuits

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