Modelling short-circuit current of a 21 MVA HTS superconducting transformer

Surdacki, P.; Jaroszyński, L.; Woźniak, Łukasz

doi:10.1088/1742-6596/1782/1/012036

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…After the transformations, the resistances of the superconductor layer can be represented by Equation ( 3 In order to formulate a computer model of one-phase transformer HTS 21 MVA 70/10.5 kV, a calculative project was elaborated for the geometric and electric parameters, based on the methodology depicted in [21][22][23][24][25][26][27][28][29]. These parameters are shown in Figure 5 and Table 3 [14,18].…”

Section: Pspice Model Of Hts Transformermentioning

confidence: 99%

“…In recent years, there have been several articles [10][11][12][13][14][15] that have described the transition of superconducting tapes in HTS transformer windings from superconducting to resistive during a short-circuit. In the literature, there are also works presenting methods of calculating the switching current in superconducting transformers [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the HTS Winding Tape on Limiting the Transient Currents in Superconducting Transformers

Surdacki

Woźniak

2022

Energies

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The article presents an extended computer model of a HTS (high temperature superconducting) 21 MVA 70/10.5 kV transformer with severalfold compound windings, based on a verified PSpice model of 10 kVA transformer with single windings. Two superconducting tapes: SCS12050 (with a copper stabiliser layer) and SF12050 (without a stabiliser) were used in the windings. The circuit model of the transformer developed in the PSpice environment considers Rhyner’s power law and the Jiles–Atherton description of the magnetic hysteresis loop. Two types of transient states were analysed: switching on a superconducting transformer to the network and an emergency short-circuit of the secondary winding. For the first five unidirectional current pulses generated when connecting an unloaded transformer to the network, the values of the pulse duration (γ angle), the temperature increase in the primary winding as well as the mean and effective values of the switch-on current were calculated. The waveforms of currents, voltages, changes in resistance and temperature during the operation short-circuit were compared for the windings with both types of HTS 2G (high temperature superconductor second generation) tapes. The conducted analysis allowed us to determine the influence of electrical and thermal parameters of the tapes in question on the effective limitation of current in transient states and the possibility of their use in the construction of superconducting transformer windings.

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Section: Pspice Model Of Hts Transformermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of the HTS Winding Tape on Limiting the Transient Currents in Superconducting Transformers

Surdacki

Woźniak

2022

Energies

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Computer Simulation of a Superconducting Transformer Short-Circuit

Jaroszyński

2024

IAPGOS

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High critical temperature superconductor power devices have unique characteristics that reduce energy losses during transmission and distribution of electricity. These superconductors allow for high current density, enabling the construction of smaller, lighter, and more transportable installations. A superconducting transformer can significantly reduce the dynamic effects of the short-circuit current during the initial milliseconds of a fault. High temperature superconductor windings, on the other hand, are relatively lightweight and have a low heat capacity. Despite being cryogenically cooled and managing already limited current, the windings made of second-generation high-temperature superconductor can be vulnerable to thermal damage, which may occur in a relatively short timeframe. A numerical study of a short circuit in a three-phase power system with a 10 MVA 115/16.5 kV superconducting transformer is presented in this paper. The superconducting tape's nonlinear electrical and thermal characteristics, as well as heat buildup in the transformer windings during a short circuit, are all taken into consideration by the transformer model.

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Modelling short-circuit current of a 21 MVA HTS superconducting transformer

Cited by 2 publications

References 10 publications

Influence of the HTS Winding Tape on Limiting the Transient Currents in Superconducting Transformers

Influence of the HTS Winding Tape on Limiting the Transient Currents in Superconducting Transformers

Computer Simulation of a Superconducting Transformer Short-Circuit

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