Design guideline of flux-lock type HTS fault current limiter for power system application

Matsumura, Toshiro; Shimizu, Hirotaka; Yokomizu, Yasunobu

doi:10.1109/77.920235

Cited by 34 publications

(8 citation statements)

References 7 publications

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“…6(a) and (b) correspond to the results for sample 1 and sample 2, respectively. Filled circles, triangles and squares indicate the characteristics for , 10.0 and 15.0 in both figures, respectively. The broken lines in Fig.…”

Section: Voltage-current Density Characteristicsmentioning

confidence: 98%

Flux Flow Resistance in Bi2223 Generated by Pulse Currents

Mutsuura

Shimizu

Yokomizu

et al. 2005

IEEE Trans. Appl. Supercond.

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We have proposed a current limiting element using the flux flow resistance in a high temperature superconductor (HTS) for a pulse over-current such as a magnetizing inrush current in a transformer. We experimentally investigated the generation process of flux flow resistance in a Bi2223 bulk with an inrush current. The voltage-current density characteristics and their dependence on the joule heat generated in the Bi2223 bulk were measured. Comparing the results with the characteristics for the ac over-current, we made it clear that the both have almost the same characteristics.

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Section: Voltage-current Density Characteristicsmentioning

confidence: 98%

Flux Flow Resistance in Bi2223 Generated by Pulse Currents

Mutsuura

Shimizu

Yokomizu

et al. 2005

IEEE Trans. Appl. Supercond.

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“…It was revealed that applied magnetic field could induce simultaneous quenches in all YBCO elements when the fault current limiting units connected in series. T. Matsumura [19] applied AC magnetic field to the AC SFCL to get higher resistance only in a current limiting phase. T. Matsumura and S. Lim reported the resistance of the superconducting tapes element and the limiting current capacity of the flux-lock type Superconducting fault current limiter (SFCL) increased by applying the magnetic field into the superconducting tapes' element and adjusting the inductance ratio between the two coils, which was related with the initial limiting current level [20,21].…”

Section: Of 11mentioning

confidence: 99%

Effects of Magnetic Fields on Quench Characteristics of Superconducting Tape for Superconducting Fault Current Limiter

et al. 2019

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In DC systems, DC resistive type superconducting fault current limiters (R-SFCLs) can respond within a few hundred milliseconds and limit the fault current to a very low level to protect the power equipment in DC systems. The main part of R-SFCLs are superconducting tapes. When short-circuit faults occur in the system, the superconducting tapes will quench and become a large quenched resistor to limit the fault current. The surrounding magnetic fields and the magnetic fields caused by the superconducting tapes itself influence the quench characteristics of the superconducting tapes of R-SFCLs. Thus, the current limiting characteristics of R-SFCLs will also be affected. Until present, very few studies have investigated the effects of magnetic fields on quench characteristics of superconducting tapes for DC R-SFCL. The objective of this paper is to obtain the effects of magnetic fields on quench characteristics of superconducting tapes for DC R-SFCL. Two different kinds of YBa2Cu3O7-δ (YBCO) tapes are studied under a permanent magnetic field of 0, 42.4, 75.9, 122.9 mT, respectively. One is from Shanghai Superconductor Technology Co., Ltd., Shanghai, China, type ST-12-L (named SC_SH) and the other is from American Superconductor Inc. Boston, MA, USA, type 8602 (named SC_8602). The research results show that the magnetic fields influence both the amplitude and the rising rate of the quenched resistance of an SC_SH tape. Under the same magnetic field, both the speed of quenching and the quenching resistance of SC_SH tape are larger than them of SC_8602 when the prospective current exceeds 800 A. Thus SC_SH tape can limit the fault current faster and to a lower level.

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“…Other quench types include the transformer type [8] and the flux flow type [9,10]. The transformer type is a transformer wound with superconducting wire or bulk material.…”

Section: Types Of Sfcl and Comparisonsmentioning

confidence: 99%

“…The transformer type is a transformer wound with superconducting wire or bulk material. The flux flow type [9,10] contains multiple coils, some of superconducting wire and others of normal metal wire, wound on an iron core. This type is usually kept under equilibrium conditions.…”

Section: Types Of Sfcl and Comparisonsmentioning

confidence: 99%

Application study of a high‐temperature superconducting fault current limiter for electric power system

Shimizu

Naito

Yamaguchi

et al. 2006

Electrical Engineering Japan

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SUMMARYUsing high-temperature superconductors, a superconducting fault current limiter (SFCL) was fabricated and tested. The superconductor and a vacuum interrupter serving as a commutation switch were connected in parallel with a bypass coil. When a fault occurs and excessive current flows, the superconductor is first quenched and the current is transferred to the bypass coil because of the voltage drop of the superconductor. At the same time, since a magnetic field is generated by the current flowing in the bypass coil, the commutation switch is immediately driven by an electromagnetic repulsion plate connected to the driving rod of the vacuum interrupter (VI), and the superconductor is separated from this circuit. Using the test model, we were able to separate the superconductor from the circuit by the movement of the VI within a half current cycle and to transfer all current to the bypass coil. Since the operation of the commutation switch is included in the current limiting operation of this test model, it will be a useful circuit in the development of SFCL in the future. Moreover, since it can make the energy consumption of the superconductor small during the fault state due to the realization of a high-speed switch with simple composition, the burden on the superconductor is reduced compared with the conventional resistive type of SFCL and it is considered that the flexibility of SFCL design is increased. Cooperation with a circuit breaker was also considered; trial calculations of the parameters and energy of operation were conducted and a discussion of the installation of the SFCL in an electric power system is presented.

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Design guideline of flux-lock type HTS fault current limiter for power system application

Cited by 34 publications

References 7 publications

Flux Flow Resistance in Bi2223 Generated by Pulse Currents

Flux Flow Resistance in Bi2223 Generated by Pulse Currents

Effects of Magnetic Fields on Quench Characteristics of Superconducting Tape for Superconducting Fault Current Limiter

Application study of a high‐temperature superconducting fault current limiter for electric power system

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