Development of quench protection system for HTS coils by active power method

Nanato, N.; Tsumiyama, Y.; Kim, S.B.; Murase, S.; Seong, K.C.; Kim, H.-J.

doi:10.1016/j.physc.2007.02.047

Cited by 21 publications

(13 citation statements)

References 6 publications

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“…In a large HTS coil, a lead-wire from the central voltage tap may cause a short circuit when high voltage is applied. Japan has developed a quench protection system based on the active power method which detects a quench by measuring the instantaneous active power generated in HTS coil [15]. The protection system is very strong against to the noise and no more needs a central voltage tap.…”

Section: Active Power Methodsmentioning

confidence: 99%

“…So, it is essential that the quench should be detected quickly and precisely so that the coils can be safely discharged. Figure 11 shows a quench protection circuit, which consists of two IGBT switches, a quench detection circuit and a protection resistor [15]. IGBT switches are applicable for both of the direct and alternative transport current.…”

Section: Quench Protection Circuitmentioning

confidence: 99%

See 1 more Smart Citation

HTS transformer and its related loss measurement and quench protection techniques

Jianxun

Chen

Guo

et al. 2008

2008 27th Chinese Control Conference

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Recently research and development concerning applications of high temperature superconducting (HTS) transformers have been progressed actively in the world. Besides the HTS rated current capability, it is also essential to develop the relevant and precise performance test and protection systems for HTS transformers. This paper mainly presents elementary test and protection methods of HTS transformers including AC loss measurement, and quench detection and protection. A new integrated measurement system for HTS transformers is also proposed by using the Labview virtual instrument software.

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Section: Active Power Methodsmentioning

confidence: 99%

Section: Quench Protection Circuitmentioning

confidence: 99%

HTS transformer and its related loss measurement and quench protection techniques

Jianxun

Chen

Guo

et al. 2008

2008 27th Chinese Control Conference

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“…Superconducting coils require a perfectly DC current [4], [5], and due to the nature of the superconducting wire, their voltages are virtually zero (about 1 µV per wire centimeter, because of the superconducting character of the wire). It comes to use the potentialities of low voltage operation of fuel cells, especially in terms of control of the fuel cell current by means of hydrogen flow rate, as it was demonstrated above.…”

Section: B Single Fuel Cell Supplying a Superconducting Coilmentioning

confidence: 99%

The Use of a Small Single Fuel Cell to Feed a 10-H Superconducting Coil

Hinaje

Raël

Berger

et al. 2018

IEEE Trans. Appl. Supercond.

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Abstract-In this paper, we propose to replace the usual dedicated electronic power supplies of superconducting coil, which are in most cases a huge volume and/or a low energy yield, by a 100 cm² single proton exchange membrane fuel cell (PEMFC). Indeed, fuel cells are electrochemical converters which can be considered as DC low voltage electrical source. Preliminary investigations led with a single proton exchange membrane fuel cell (PEMFC) could evidence the behavior as a DC current source, in which the current is directly controlled by the hydrogen flow rate. In a first step, we highlighted the feasibility by supplying a small superconducting coil, with an inductance value of 4 mH by means of a single PEMFC and proved that dedicated power source can be replaced by fuel cell. The second step is to feed a superconducting coil with higher inductance, 10 H, as presented in the present work.  Index Terms-power supply, proton exchange membrane fuel cell, superconducting coils.

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“…The HTS protection should rely on an active technique [14], [15]. The terminal signal voltage of each coil is first acquired by a digital card.…”

Section: B Quench Detection and Protection Of Hts Coilsmentioning

confidence: 99%

Quench Protection Design of an 8-T Magnet Built With Low- and High-Temperature Superconducting Coils

Wang

Chen

et al. 2012

IEEE Trans. Appl. Supercond.

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A quench protection system has been proposed for an 8-T split superconducting magnet consisting of low-temperature superconducting (LTS) NbTi coils and high-temperature superconducting (HTS) Bi2223 coils. For the LTS coils, a code has been developed to adjust the circuit parameters and the heater geometry. The calculation method of the internal electric potential in the LTS coil is introduced. For the HTS coils, the temperature and current margins are studied. The voltage signal for quench detection is chosen, and quench simulations on the HTS coil with different heating fluxes and heating zones are performed. The simulation results show that the employment of only the dump resistors can bring down the current and the temperature rise rapidly in the event of a quench. The coupling effect of the LTS and HTS coils is simulated and analyzed.

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Development of quench protection system for HTS coils by active power method

Cited by 21 publications

References 6 publications

HTS transformer and its related loss measurement and quench protection techniques

HTS transformer and its related loss measurement and quench protection techniques

The Use of a Small Single Fuel Cell to Feed a 10-H Superconducting Coil

Quench Protection Design of an 8-T Magnet Built With Low- and High-Temperature Superconducting Coils

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