Temperature Dependent Equivalent Circuit of a Magnetic-Shield Type SFCL

Fabbri, Massimo; Morandi, Antonio; Negrini, Francesco; Ribani, Pier Luigi

doi:10.1109/tasc.2005.849456

Cited by 10 publications

(9 citation statements)

References 6 publications

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“…However the dependence of the critical current density of the superconductor on the temperature needs to be incorporated and a further set of equation is required to solve the problem. By assuming, for each loop, an uniform temperature the integration of the energy conservation law over the loop j of the discretized tube (having volume τ j and current i j ) gives [16] …”

Section: The Mathematical Modelmentioning

confidence: 99%

“…Extensive and accurate numerical modeling, based on commercial or self-developed finite elements codes, has also been carried out in parallel, mainly with the aim to aid and optimize the design of the device [7]- [10]. However, in order to investigate the reciprocal interaction of the SFCL with power networks an equivalent circuit is required [11]- [16]. This equivalent circuit should appropriately take into account all the relevant physical phenomena that affect the device behavior in a crucial way, including thermal effects and magnetic saturation.…”

Section: Introductionmentioning

confidence: 99%

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Coupled Electromagnetic-Thermal Model and Equivalent Circuit of a Magnetic Shield Type SFCL

Morandi

Fabbri

Ribani

2013

IEEE Trans. Appl. Supercond.

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A numerical model of a magnetic shield type superconducting fault current limiter based on an integral formulation of the coupled electromagnetic-thermal problem is presented. A step-by-step linearization of the magnetic problem is introduced in order to solve the system. A simplified equivalent circuit is introduced and implemented inside the Electromagnetic Transient Program power system simulator. The results of the simplified and the full model are compared and the error is evaluated. Index Terms-Coupled problem, Electromagnetic Transient Program (EMTP), equivalent circuit, magnetic shield type fault current limiter (FCL), nonlinear magnetostatics, power system simulator, superconducting fault current limiter (SFCL).

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Section: The Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coupled Electromagnetic-Thermal Model and Equivalent Circuit of a Magnetic Shield Type SFCL

Morandi

Fabbri

Ribani

2013

IEEE Trans. Appl. Supercond.

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“…The distribution of current density produced by the AC coil is calculated by means of the circuit approach developed in [23], [26]- [28]. To accomplish this step we linearize the B-H curves of the material (see Fig.…”

Section: Layout Of the Heatermentioning

confidence: 99%

“…The temperature distribution at the end of the integration interval (time t + ∆t) is obtained by means of the circuit approach developed in [26]- [28]. The calculation is restarted from step i.…”

Section: Layout Of the Heatermentioning

confidence: 99%

In-Depth Induction Heating of Large Steel Slabs by Means of a DC Saturating Field Produced by Superconducting Coils

Morandi

Fabbri

2016

IEEE Trans. Appl. Supercond.

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The feasibility of an innovative in-depth AC induction heating method for large steel slabs is investigated. Beside the AC field, which induces the heating currents, a large DC magnetic field is also applied, which brings the material to saturation. Due to the saturation, the permeability is reduced by orders of magnitude and the penetration depth is drastically increased, thus enabling much faster and more uniform heating. In order to produce the field needed for the saturation of common steel workpieces, lossless DC superconducting magnets need to be employed.A possible layout of an AC induction heater employing magnetic saturation (saturated AC induction heater) is discussed. The conceptual design of the superconducting magnet needed is carried out based on present state-of-the-art superconducting materials. The performance of the saturated AC induction heater is investigated numerically and compared with the case without magnetic saturation.

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“…At this time the equivalent of copper winding core reactor, the inductance is relatively large, thus limiting short-circuit current. This type SFCL the inadequacy of the equipment is heavier, how to effectively reduce the recovery time is also a need to carefully study the problem [6].…”

Section: The Magnetic Shielding Sfclmentioning

confidence: 99%

Summary of Superconducting Fault Current Limiter Technology

Wang

Jiang

Wang

2012

Frontiers in Computer Education

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Abstract. In recent years, superconducting fault current limiter (SFCL) has become one of the forefront topics of current-limiting technology in the world. In this paper, the structure and working principle of several SFCLs which perform high in the actual power grid, such as resistance type, reaction type, hybrid type, magnetic shielding type, saturated iron core type, bridge type, active type and three-phase circuit reactance type. Through the analysis of the advantages and disadvantages of the SFCLs, the reference for further study of the SFCLs is provided.

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Temperature Dependent Equivalent Circuit of a Magnetic-Shield Type SFCL

Cited by 10 publications

References 6 publications

Coupled Electromagnetic-Thermal Model and Equivalent Circuit of a Magnetic Shield Type SFCL

Coupled Electromagnetic-Thermal Model and Equivalent Circuit of a Magnetic Shield Type SFCL

In-Depth Induction Heating of Large Steel Slabs by Means of a DC Saturating Field Produced by Superconducting Coils

Summary of Superconducting Fault Current Limiter Technology

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