Superconducting Fault Current Limiter Design Using Parallel-Connected YBCO Thin Films

Ainslie, Mark; Baba, Jumpei; Salvucci, Valerio; Nitta, T.; Fukunaga, T.; Shibuya, Masatoyo; Torii, S.; Matsumura, Toshiro; Kumagai, Toru

doi:10.1109/tasc.2009.2017721

Cited by 19 publications

(10 citation statements)

References 4 publications

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“…As compare to circuit breakers, R-SFCL gives much better performance it is a fast-operating device it stops the fault currents in the first cycle and continuity of supply is possible. Here R-SFCL material is made with yttrium barium copper oxide (YBCO) [11]. At normal working conditions, YBCO acts as a superconductor, during abnormal conditions YBCO material is heated and increases the impedance because of increasing impedance, fault currents are minimized [4].…”

Section: Sfcl Resistive Typementioning

confidence: 99%

Improvement of transient stability in microgrids using RSFCL with series active power filter

Rao

Rosalina

2019

SN Appl. Sci.

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Now a day's non-conventional energy sources like PV power and Wind power sources are well developed because conventional energy sources are reduced day by day and at the same time the population has been increased. These drawbacks can be overcome by developing the microgrids. In current trends, microgrid protection is a very challenging task. Due to the interconnection of several distributed generators, fault currents are produced. Resistive type superconducting fault current limiter is used for the protection of microgrids because its operating time is very less, it stops the abnormal currents with in the first cycle and continuity of supply is possible. But R-SFCL had some disadvantages, it is not compensated for the reactive power. Then voltage levels are not compensated, for that reason series active power filters are used along with R-SFCL. Here series active power filters are compensating the voltage magnitudes and reduce the harmonics and then transient stability is improved in the microgrids. This work is done using MATLAB/Simulink.

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Section: Sfcl Resistive Typementioning

confidence: 99%

Improvement of transient stability in microgrids using RSFCL with series active power filter

Rao

Rosalina

2019

SN Appl. Sci.

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“…A range of different materials can be used to build a resistive type FCL including BSCCO coils [1], YBCO bulks [2], thin films [3] and YBCO coated conductors [4]. During the recent decade the price of the YBCO coated conductor drops significantly and the performance is improved, therefore, it has gain significant attentions as the superconducting material for resistive type FCL and the research on it has been carried out worldwide.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Current and Voltage Sharing Issues for Resistive Fault Current Limiter Using YBCO Coated Conductors

Hong

Jin

Ainslie

et al. 2011

IEEE Trans. Appl. Supercond.

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YBaCuO-coated conductors offer great potential in terms of performance and cost-saving for superconducting fault current limiter (SFCL). A resistive SFCL based on coated conductors can be made from several tapes connected in parallel or in series. Ideally, the current and voltage are shared uniformly by the tapes when quench occurs. However, due to the non-uniformity of property of the tapes and the relative positions of the tapes, the currents and the voltages of the tapes are different. In this paper, a numerical model is developed to investigate the current and voltage sharing problem for the resistive SFCL. This model is able to simulate the dynamic response of YBCO tapes in normal and quench conditions. Firstly, four tapes with different c 's and n values in -power law are connected in parallel to carry the fault current. The model demonstrates how the currents are distributed among the four tapes. These four tapes are then connected in series to withstand the line voltage. In this case, the model investigates the voltage sharing between the tapes. Several factors that would affect the process of quenches are discussed including the field dependency of c , the magnetic coupling between the tapes and the relative positions of the tapes.

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“…A YBCO thin film is paralleled with a resistance. During the normal condition, much of the current flow into the superconductor due to its quite low impedance and the impedance of the SFCL (a YBCO thin film element and a parallel resistance) is given by (1).…”

Section: Introductionmentioning

confidence: 99%

“…The maximum critical current of a present YBCO thin film is, however, several hundred ampere and a YBCO thin film cannot withstand higher than 10 times its critical current. To overcome these problems, it is necessary to connect thin films in series and parallel configuration [1]. By using this series and parallel configuration, there is a risk that the heat generation on a particular thin film due to its worse characteristics becomes much larger than other thin films.…”

Section: Introductionmentioning

confidence: 99%

2 Dimensional Voltage Distribution Measurement of YBCO Thin Film during S/N transition

Mori¹,

Nishioka

Baba

et al. 2011

Journal of International Council on Electrical Engineering

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-The process of the resistance generation in a YBCO thin film during the S/N transition used in resistive type fault current limiters has not been clarified completely. During the process, a thin film may be broken by overheat. Understanding the process of the resistance generation would lead to prevent thin films from this burnout. In this paper, the voltage distribution of a YBCO thin film during the S/N transition is measured by probes arranged 2 dimensionally on a thin film to understand how the normal transition area on a YBCO thin film expand. The voltage probes are placed in a matrix of 3 times 10 on a 30-by-210 millimeter YBCO thin film. A sinusoidal wave current whose amplitude is several hundreds ampere flows into the thin film connected with a parallel resistance. It is observed from these measurements that a narrow normal conducting state band vertical to the current appears first, and this band expands along the current. The critical current of the area on the thin film where the normal conducting state band appears first is the lowest along the thin film. This band is considered to have a great influence on the resistance generation of the YBCO thin film.

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Superconducting Fault Current Limiter Design Using Parallel-Connected YBCO Thin Films

Cited by 19 publications

References 4 publications

Improvement of transient stability in microgrids using RSFCL with series active power filter

Improvement of transient stability in microgrids using RSFCL with series active power filter

Numerical Analysis of the Current and Voltage Sharing Issues for Resistive Fault Current Limiter Using YBCO Coated Conductors

2 Dimensional Voltage Distribution Measurement of YBCO Thin Film during S/N transition

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