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

• Authors: G. Wojtasiewicz
• Languages of publication: EN

Abstracts

EN

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).

Keywords

EN

74.90.+n; 84.70.+p; 84.71.-b; 85.25.-j; 85.25.Am; 85.25.Qc

Discipline

• 85.25.Qc: Superconducting surface acoustic wave devices and other superconducting devices
• 84.70.+p: High-current and high-voltage technology: power systems; power transmission lines and cables(for superconducting cables, see 84.71.Fk)
• 85.25.-j: Superconducting devices
• 85.25.Am: Superconducting device characterization, design, and modeling
• 84.71.-b: Superconducting high-power technology(see also 84.30.Jc Power electronics; power supply circuits)
• 74.90.+n: Other topics in superconductivity (restricted to new topics in section 74)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 130
• Issue: 2
• Pages: 516-520

Dates

published

2016-08

Contributors

author

G. Wojtasiewicz

• Electrotechnical Institute, M. Pożaryskiego 28, 04-703 Warsaw, Poland

References

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• [6] G. Wojtasiewicz, T. Janowski, S. Kozak, J. Kozak, M. Majka, B. Kondratowicz-Kucewicz, IEEE Trans. Appl. Supercond. 23, 5500505 (2013), doi: 10.1109/TASC.2012.2234315
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Identifiers

DOI

10.12693/APhysPolA.130.516