Comparison of Overcurrent Responses of 2G HTS Tapes

Czerwiński, Dariusz; Jaroszyński, L.; Majka, M.; Kozak, J.; Charmas, B.

doi:10.1109/tasc.2016.2520080

Cited by 13 publications

(4 citation statements)

References 9 publications

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“…Mathematical model of the superconducting tape consists of three non-linear and one linear resistor in parallel. These resistors include: Hastelloy, a silver layer, a copper layer and a superconducting layer (Czerwinski, Jaroszynski, Majka, Kozak, and Charmas, 2016;. In comparison to circuit modelling finite element method (FEM) subdivides a large problem into smaller, simpler parts that are called finite elements.…”

Section: Equivalent Circuit Of 2g Ybco Superconducting Tapementioning

confidence: 99%

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The Numerical Model of 2g Ybco Superconducting Tape in the Windings of the Transformer

Woźniak

Surdacki

Jaroszyński

2017

acs

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Computer assisted calculations consists in applying software for the simu-lation of models of certain devices and later analysing their behavior under given conditions corresponding to real working conditions in a specific environment.The paper proposes a circuit model of 2G YBCO super-conducting tape created in the PSpice program. The model consists of passive blocks and active user blocks of analogue behavioural modelling (ABM). ABM blocks calculate the conductances, the currents of the indi-vidual layers of the superconducting tape, its thermal capacity, the heating power, the cooling power and resulting temperature of the tape. The model uses table of thermal power density passed to the liquid nitrogen vs. temperature. Smooth transition of the YBCO superconductor layer into the resistive state is described by Rhyner’s power law. The developed model was used for generating waveforms of thermal and electrical quantities.

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Section: Equivalent Circuit Of 2g Ybco Superconducting Tapementioning

confidence: 99%

“…The second hierarchical block calculates the resultant conductance of the tape (G). This block allows for a smooth transition of the YBCO superconductor layer into the resistive state in which the current is described by Rhyner's power law (1) (Czerwinski et al, 2016;Janowski et al, 2016;Jaroszynski et al, 2014). (1)…”

Section: Details Of the Simulationmentioning

confidence: 99%

The Numerical Model of 2g Ybco Superconducting Tape in the Windings of the Transformer

Woźniak

Surdacki

Jaroszyński

2017

acs

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“…At present, there are few research on the failure mode of ReBCO tapes. The existing studies mainly focus on the critical current recession and threshold current of ReBCO tapes under different types of overcurrent [12][13][14][15]. Our research team has also previously studied the ultimate withstand capability of ReBCO tapes with different encapsulation materials under various overcurrents and the degradation of the critical current of ReBCO tapes under repeated overcurrent [9,10,16,17].…”

Section: Introductionmentioning

confidence: 99%

Research on damage characteristics and microscopic appearance of ReBCO tapes after DC overcurrent

Yang

et al. 2023

Phys. Scr.

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With the expansion of the power grid, the use of DC transmission technology is becoming increasingly prevalent. This has led to higher transmission voltage levels, which in turn have brought to the fore the issue of large short-circuit currents. The existing circuit limiter's performance is insufficient to meet the growing demand. Superconducting fault current limiter, which based on ReBCO tapes, is considered to be the solution to the problem of large short-circuit current. However, the failure mode of ReBCO tapes under DC overcurrent remains to be studied. In the superconducting state, the current flows mainly through the superconducting layer. Therefore, it is necessary to investigate the overcurrent characteristics of the superconducting layer after overcurrent. In this work, the damage characteristics and microscopic appearance of ReBCO tapes after overcurrent were investigated. The magnetic field distribution characteristics and the microscopic appearance of the superconducting layers of ReBCO tapes with different degrees of critical current recession were investigated, and the chemical elements of the superconducting layers were analyzed. The results show that large-area pits were found on superconducting layer after overcurrent, the element types and mass proportions did not change. Overcurrent affects the superconductivity of the tape mainly by changing the physical structure of the superconducting layer.

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“…The use of these cables allows us to reduce power losses in the transformer winding and to increase its efficiency and power density. Modern superconducting transformers use second-generation laminated tape (HTS 2G) windings made of the high-temperature ceramic compound YBCO (yttrium barium copper oxide, YBa 2 Cu 3 O 7 ) [1,2]. Superconducting transformers, due to higher current densities (about ten times), are smaller and lighter than conventional transformers.…”

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 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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Comparison of Overcurrent Responses of 2G HTS Tapes

Cited by 13 publications

References 9 publications

The Numerical Model of 2g Ybco Superconducting Tape in the Windings of the Transformer

The Numerical Model of 2g Ybco Superconducting Tape in the Windings of the Transformer

Research on damage characteristics and microscopic appearance of ReBCO tapes after DC overcurrent

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

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