A 15-kVA High-Temperature Superconducting Partial-Core Transformer—Part 1: Transformer Modeling

Lapthorn, Andrew; Bodger, P.S.; Enright, W.

doi:10.1109/tpwrd.2012.2226478

Cited by 17 publications

(8 citation statements)

References 17 publications

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“…The parameters of the computer model of the magnetic material described by the equations are presented in Table 1 containing the following catalogue data: the coordinates of the inflection point of the magnetisation curve B x , H x , the initial permeability of the magnetic material µ, the magnetic field strength of the coercivity H c , the remanence induction B r , the saturation induction B s , the magnetic field strength H s , and the saturation magnetisation of M s [30][31][32][33][34]. For the construction of the modelled windings, two types of second-generation layered tapes (HTS 2G) made of the YBCO high-temperature superconductor were used to investigate the effect of their parameters on the limitation of currents in transient states such as switching on an unloaded transformer to the network and an emergency short-circuit during transformer operation.…”

Section: Pspice Model Of Hts Transformermentioning

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%

“…However, circuit modelling using PSpice provides satisfactory results and is faster compared to FEM analysis [17,18]. There are also some papers describing the models, design, and construction of HTS transformers of both small and considerable power [21][22][23][24][25][26][27][28][29][30].…”

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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“…).The uninterrupted and trouble-free operation of electric trains depends on the condition of the traction transformers [1,5,6]. Analysis of literature sources shows that [7][8][9][10][11][12][13][14][15][16] during the operation of transformers, malfunctions can be observed in the form of failure of the magnetic circuit, insulation failure, faults at the output of the transformer, oil leakage, cracks inside the transformer, excess of the permissible oil temperature, violations of oil circulation, loss of dielectric properties of oil, cracks in the rods, transformer operation with noise. [2,3,[17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Investigation of factors influencing the operational characteristics of traction transformers

et al. 2021

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This article presents the results of visual inspections and a brief statistical analysis of the data obtained in order to identify the observed defects in traction transformers of ODTsE 5000 / 25 B and OTsR 5600/25 types in operation in the railway system. The analysis revealed that the main parameters that determine the operational characteristics of traction transformers are windings and insulation. Recommendations for the prevention of faults in traction transformers and increase their service life have been developed.

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“…Although the full core design seems like a reasonable progression for a superconducting transformer, it fails to take full advantage of one of the key benefits, that is, the reduction in size (Mehta et al, 1997). The large current densities possible for HTS conductors allows for a small winding window; however, in a full-core design, the winding window is surrounded by the outer limbs and connecting yokes of the core, preventing a large reduction in size (Lapthorn et al, 2013a(Lapthorn et al, , 2013b. In addition, the cryostat that used to contain liquid nitrogen will also increase the core window size.…”

Section: Introductionmentioning

confidence: 99%

“…HTS-PCT, has drawn researchers' attention. An HTS-PCT made of the first-generation (1G) HTS wires was first designed and tested by Lapthorn et al (2013aLapthorn et al ( , 2013b. Moreover, with the development of HTS materials, the stability and critical current of the second-generation (2G) HTS wires have been greatly improved.…”

Section: Introductionmentioning

confidence: 99%

Modeling and verification of the equivalent circuit for high temperature superconducting partial-core transformer with ReBCO-coated conductors

Zhang

et al. 2018

COMPEL

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Purpose The purpose of this study is to propose a modeling method of the equivalent circuit for a new type of high-temperature superconducting partial-core transformer (HTS-PCT) made of ReBCO-coated conductors. Design/methodology/approach The modeling process is based on the “Steinmetz” equivalent circuit. The impedance components in the circuit are obtained by the calculations of the core losses and AC losses of the HTS windings by using theoretical methods. An iterative computation is also used to decide the equivalent resistances of the AC losses of the primary and secondary HTS windings. The reactance components in the circuit are calculated from the energy stored in the magnetic fields by finite element method. The validation of the modeling method is verified by experimental results Findings The modeling method of the equivalent circuit of HTS-PCT is valid, and an equivalent circuit for HTS-PCT is presented. Practical implications The equivalent circuit of HTS-PCT could be obtained by the suggested modeling method. Then, it is easy to analyze the characteristics of the HTS-PCT by its equivalent circuit. Moreover, the modeling method could also be useful for the design of a specific HTS-PCT. Originality/value The study proposes a modeling method of the HTS-PCT made of the second-generation HTS tapes, i.e. ReBCO-coated conductors.

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A 15-kVA High-Temperature Superconducting Partial-Core Transformer—Part 1: Transformer Modeling

Cited by 17 publications

References 17 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

Investigation of factors influencing the operational characteristics of traction transformers

Modeling and verification of the equivalent circuit for high temperature superconducting partial-core transformer with ReBCO-coated conductors

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