An Optimal Configuration Design Method for HTS-SMES Coils

Noguchi, So; Ishiyama, Atsushi; Akita, S.; Kasahara, H.; Tatsuta, Y.; Kouso, Seiichi

doi:10.1109/tasc.2005.849337

Cited by 34 publications

(26 citation statements)

References 9 publications

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“…The toroidal HTS-SMES magnets, which were used for investigating the chain of quenches, were optimizedly designed by the optimal design method in [3]. The coils are wound with YBCO tape, whose critical current is computed based on the percolation model [5].…”

Section: Simulation Hts-smes Modelmentioning

confidence: 99%

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Overturning Force Simulation on Chain of Quenches of Toroidal HTS-SMES

Oga

Noguchi

Igarashi

2012

IEEE Trans. Appl. Supercond.

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Abstract-In recent years, many toroidal HTS-SMES consisting of some superconducting element coils have been investigated and designed. In stable operation, the electromagnetic force applying to the superconducting element coils maintains balance because of the toroid structure and the same transport current of each superconducting element coil. However, if one of the superconducting element coils transitioned into a resistive state, the balance of the electromagnetic force would be broken down, and then the huge electromagnetic force would work onto the superconducting element coils. The huge electromagnetic force may overturn the superconducting element coils, and consequently a large accident occurs. However, the behavior of the overturning electromagnetic force after the transition of some superconducting element coils into the resistive state has been not yet well investigated. For the design of the HTS-SMES magnet, it is, therefore, necessary to investigate the overturning electromagnetic force on the design stage. We have developed a simulation code to investigate the behavior of the overturning electromagnetic force on the toroidal HTS-SMES system after the transition of one superconducting element coil into the resistive state. The magnetic field and the circuit analysis are coupled and solved in the developed simulation code.Index Terms-Electromagnetic force, HTS-SMES, magnetic field simulation, superconducting magnet.

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Section: Simulation Hts-smes Modelmentioning

confidence: 99%

“…N recent years, many high-temperature superconducting magnetic energy storage (HTS-SMES) systems have been investigated and designed in many countries [1]- [3]. Their structure is usually a toroid consisting of some superconducting element coils owing to storing excessively high energy.…”

Section: Introductionmentioning

confidence: 99%

Overturning Force Simulation on Chain of Quenches of Toroidal HTS-SMES

Oga

Noguchi

Igarashi

2012

IEEE Trans. Appl. Supercond.

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“…[3], are employed. The numbers of the superconducting element coils are 8, 12, 16, 18 and 24, the storage energy is 72 MJ and Table 1 shows the specifications of them.…”

Section: Simulation Modelmentioning

confidence: 99%

“…In recent years, many HTS superconducting magnetic energy storage (HTS-SMES) systems have been investigated and designed [1][2][3]. They usually consist of some superconducting element coils due to efficiently storing energy.…”

Section: Introductionmentioning

confidence: 99%

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Quench simulation of SMES consisting of some superconducting coils

Noguchi

Oga

Igarashi

2011

Physica C: Superconductivity and its Applications

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In recent years, many HTS superconducting magnetic energy storage (HTS-SMES) systems are investigated and designed. They usually consist of some superconducting element coils due to storing excessively high energy. If one of them was quenched, the storage energy of the superconducting element coil quenched has to be immediately dispersed to protect the HTS-SMES system. As the result, the current of the other element coils, which do not reach to quench, increases since the magnetic coupling between the quenched element coil and the others are excessively strong. The increase of the current may cause the quench of the other element coils. If the energy dispersion of the element coil quenched was failed, the other superconducting element coil would be quenched in series. Therefore, it is necessary to investigate the behavior of the 2 HTS-SMES after quenching one or more element coils. To protect a chain of quenches, it is also important to investigate the time constant of the coils. We have developed a simulation code to investigate the behavior of the HTS-SMES. By the quench simulation, it is indicated that a chain of quenches is caused by a quench of one element coil.

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Numerical optimization for magnetic force field enhancement on superconducting coils

Liu

Toko

2006

Japan J. Indust. Appl. Math.

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High magnetic force field plays an important role in the wide applications of magnetic processing such as magnetic separation of ferromagnetic materials and magnetic levitation of diamagnetic materials. Therefore, the research on magnetic force field enhancement has been becoming a popular subject recent years. Many experimental methods have been designed and applied to enhance magnetic force field, however those methods took higher costs and longer time to set up real installations. A numerical optimization method was developed, which used only superconducting coils to calculate a magnetic force field and maximize it. In the method, the magnetic flux density B, the magnetic field gradient grad B and the magnetic force field grad(B 2 /2), as objective functions respectively, were maximized with constraints of the total volumes of coils and the B-J characteristics of superconductors. By comparing the numerical optimization results with theoretical values for single coil, we found that they are in good agreement. Also, in comparison with the results obtained by random models for double coils, those by optimal models were better. Moreover, the maximal magnetic force field was higher remarkably than that generated by the previous optimal model in NIMS.

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An Optimal Configuration Design Method for HTS-SMES Coils

Cited by 34 publications

References 9 publications

Overturning Force Simulation on Chain of Quenches of Toroidal HTS-SMES

Overturning Force Simulation on Chain of Quenches of Toroidal HTS-SMES

Quench simulation of SMES consisting of some superconducting coils

Numerical optimization for magnetic force field enhancement on superconducting coils

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