Tests and Performance Analysis of 2G HTS Transformer

Wojtasiewicz, G.; Janowski, T.; Kozak, S.; Kozak, J.; Majka, M.; Kondratowicz-Kucewicz, B.

doi:10.1109/tasc.2012.2234315

Cited by 17 publications

(10 citation statements)

References 5 publications

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“…Such superconducting windings cause that the switching current of the superconducting transformer reaches higher values and longer decay times compared to conventional transformers. Superconducting transformers Four transformers were tested: three 8.5 kVA ones [4] and one 13.8 kVA one [5]. The 8.5 kVA transformers had the same coil core RZC-70/230-70.…”

Section: Effect Of Superconductor Resistancementioning

confidence: 99%

The influence of the geometry and resistance of the high voltage winding of the HTS transformer on the inrush current parameters

Komarzyniec

Majka

2018

ELECTROTECHNICAL REVIEW

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The influence of the geometry and resistance of the high voltage winding of the HTS transformer on the inrush current parameters Streszczenie. W pracy dokonano analizy prądu włączania transformatorów nadprzewodnikowych. Wartość i czas zaniku prądu włączania zależą od wymiarów promieniowych i osiowych uzwojenia górnego napięcia. W przypadku transformatorów nadprzewodnikowych parametry te istotnie zależą też od stanu w jakim znajduje się nadprzewodnik. Analizy dokonano na podstawie pomiarów prądu włączania transformatorów nadprzewodnikowych o mocach 8,5 kVA i 13,8 kVA o różnej geometrii uzwojeń. (Wpływ geometrii i rezystancji uzwojenia górnego napięcia transformatora HTS na parametry prądu włączania).

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Section: Effect Of Superconductor Resistancementioning

confidence: 99%

The influence of the geometry and resistance of the high voltage winding of the HTS transformer on the inrush current parameters

Komarzyniec

Majka

2018

ELECTROTECHNICAL REVIEW

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“…A properly designed superconducting transformer in addition to electric energy conversion can simultaneously play the role of a fault current limiter [11]. In the case of current of a magnitude exceeding the critical value for the winding, the superconducting material will switch to a resistive state.…”

Section: Superconducting Transformersmentioning

confidence: 99%

Superconducting Devices for Power Engineering

Janowski

Kondratowicz-Kucewicz

Wojtasiewicz

et al. 2016

Acta Phys. Pol. A

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The paper presents the current state of research on superconducting devices for the electrical power system, i.e. transformers, fault-current limiters, and energy storages. In particular, it describes scientific achievements of the Laboratory of Superconducting Technologies of Electrotechnical Institute. The development of distributed and renewable energy sources, as well as the increasing number of receivers with low power factor will rise interest in superconducting fault-current limiters and superconducting transformers rated below 1 MVA. Previous studies were focused on the largest power transformers and highest current superconducting fault-current limiters. ReBCO coated conductors allow to build efficient superconducting AC devices. Superconducting tape of a layered structure (second generation HTS tape) enables the construction of transformer rated up to a few MVA without the usage of parallel conductors. Relatively high resistance of the tape in normal state allows to build fault-current limiters and fault-current limiting transformers. Superconducting transformers and superconducting fault-current limiters can help to increase connected power of distribution stations and thereby accelerate development of renewable energy sources.

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“…In Laboratory of Superconducting Technologies in Lublin there was designed and built the single-phase model of a 8.8 kVA HTS transformer [6], presented in cig. 4.…”

Section: Design Of the Hts Transformermentioning

confidence: 99%

“…Experimental studies included the determination of short-circuit characteristics and short-circuit tests, using the parameters of the HTS tape, in order to verify the ability of the superconducting winding to limit the short-circuit current [6,7]. The examinations were carried out for a HTS transformer with two values of air gap width, compared with a conventional (copper) transformer of the same nominal power.…”

Section: Experimental Examinationmentioning

confidence: 99%

Fault Current Limitation by 2G HTS Superconducting Transformer - Experimental Investigation

Wojtasiewicz

2016

Acta Phys. Pol. A

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Transformers represent one of the oldest and most mature elements in a power transmission and distribution network. The new superconducting transformers are smaller and lighter than conventional ones and they have lower power losses, too. Also, the new 2G superconducting tapes with high resistivity in the normal state allow to build transformers with high short-circuit strength. The short-circuit current limiting feature of the superconducting transformer, which is the most important benefit of replacing conventional windings by superconducting ones, provides protection and significantly reduces the wear and tear of circuit breakers and other substation power equipment. This paper describes the design and experimental investigations results of a model of a 1-phase, 8.8 kVA superconducting transformer with windings made of 2G HTS tape. A special regard is given to the ability of the device's superconducting winding to limit the short-circuit current, in particular its equivalent resistance in normal state at a temperature of 77 K (i.e. resistance of the resistive layers of the HTS tape just after transition to the non-superconducting state).

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Tests and Performance Analysis of 2G HTS Transformer

Cited by 17 publications

References 5 publications

The influence of the geometry and resistance of the high voltage winding of the HTS transformer on the inrush current parameters

The influence of the geometry and resistance of the high voltage winding of the HTS transformer on the inrush current parameters

Superconducting Devices for Power Engineering

Fault Current Limitation by 2G HTS Superconducting Transformer - Experimental Investigation

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