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

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

doi:10.1109/tasc.2013.2241383

Cited by 15 publications

(10 citation statements)

References 21 publications

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“…Magnetic shield type SFCLs have been reported in References [50,51,[89][90][91][92][93][94]. They consist of a primary copper coil and secondary high temperature superconductor (HTS) tube wound around a magnetic iron core [93] as shown in Figure 8.…”

Section: Magnetic Shield Type Sfclmentioning

confidence: 99%

Fault Current Limiters in Power Systems: A Comprehensive Review

2018

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Power systems are becoming more and more complex in nature due to the integration of several power electronic devices. Protection of such systems and augmentation of reliability as well as stability highly depend on limiting the fault currents. Several fault current limiters (FCLs) have been applied in power systems as they provide rapid and efficient fault current limitation. This paper presents a comprehensive literature review of the application of different types of FCLs in power systems. Applications of superconducting and non-superconducting FCLs are categorized as: (1) application in generation, transmission and distribution networks; (2) application in alternating current (AC)/direct current (DC) systems; (3) application in renewable energy resources integration; (4) application in distributed generation (DG); and (5) application for reliability, stability and fault ride through capability enhancement. Modeling, impact and control strategies of several FCLs in power systems are presented with practical implementation cases in different countries. Recommendations are provided to improve the performance of the FCLs in power systems with modification of its structures, optimal placement and proper control design. This review paper will be a good foundation for researchers working in power system stability issues and for industry to implement the ongoing research advancement in real systems.

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Section: Magnetic Shield Type Sfclmentioning

confidence: 99%

Fault Current Limiters in Power Systems: A Comprehensive Review

2018

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“…Besides the DC field, the slab is exposed also to an AC field along the length which is generated by external copper coils. Neglecting the initial transient, the slab experiences an AC-induced current density, which is determined by using a circuital approach on the same mesh (Morandi et al, 2010(Morandi et al, , 2013. The B-H curves in each element are linearized near the local DC field value.…”

Section: Coupled Magnetic Electric and Thermal Modelsmentioning

confidence: 99%

“…The B-H curves in each element are linearized near the local DC field value. Finally, the thermal problem is solved on the same mesh (Morandi et al, 2013;Fabbri et al, 2009), assuming a heat exchange on the boundary by means of natural convection and radiation. The temperature of the furnace walls is evaluated by solving the energy balance on the refractory placed between the slab and the AC coil.…”

Section: Coupled Magnetic Electric and Thermal Modelsmentioning

confidence: 99%

AC induction heating of ferromagnetic slabs saturated with a DC field

Fabbri

Morandi

2017

COMPEL

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Purpose This study aims to investigate the feasibility of saturated AC heating of magnetic metals. In AC heating of magnetic steel below the Curie temperature, because of the high magnetic permeability, the penetration depth is in the order of 1-6 mm at 50 Hz. Surface heating is then obtained, in practice, if large slabs are processed. The necessity to provide the required surface-to-core temperature uniformity (about 25°C) at the end of the heating process, avoiding excessive thermal stresses which can lead to cracks, thus implies a long heating time. Design/methodology/approach The penetration depth can be increased if the material is brought to saturation by applying an external DC magnetic field, and a faster in-depth heating can be obtained. The DC saturating field can be produced with no losses over large volumes by means of superconducting (SC) coils. Findings The feasibility of in-depth induction heating of a 200 × 1,000 × 5,000 mm magnetic steel slab with an applied 2 T DC saturating field is numerically investigated. The results show that the use of a DC saturating field leads to shorter processes which fulfil the heating objectives. Practical implications A DC saturating field cannot be produced by means of copper coils because of the large amount of material and the unaffordable power required. However, this field can effectively be produced by means of SC magnets based on state-of-the-art materials. Originality/value Superconductivity may be the enabling technology for fast and efficient induction heating of magnetic steel slabs if the increase in productivity can balance the additional costs due to the SC magnet.

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“…The first one is called resistive-SFCL and the second one is named such as inductive-SFCL. The inductive SFCL type has two ramifications: the first one named inductive saturated core SFCL, and the second topology called inductive shielded core SFCL (Hekmati, 2014;Morandi et al, 2013). The thermal-electromagnetic models, projects and experimental tests of the shielded core inductive type are presented in (Ferreira et al, 2015;Qiu et al, 2018;Rajabi and Mousavi G., 2019).…”

Section: Introductionmentioning

confidence: 99%

Simulation of a Superconductor Fault Current Limiter with finite element method using A-V-H formulation

Santos

Martins

Santos

et al. 2020

Anais Do Simpósio Brasileiro De Sistemas Elétricos 2020

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Nowadays, the complexity of electrical power systems is increasing. Consequently, the occurrence and the amplitude of the fault current are rising. This fault currents harm the substations’ electrical equipment. Besides, the growth in the fault current level is forcing the change of the circuit breakers to others with a higher interruption capability. A proposal to solve this problem is the fault current limiter (FCL). This equipment has low impedance in the normal operation and high impedance in a short circuit moment. Superconductors are an advantageous choice of material in this case, because of their properties. In order to simulate this equipment, the 2-D Finite Element Method (FEM) has been used. In this paper, a novel FEM simulation analysis of the saturated core Superconductor Fault Current Limiter (SFCL) is proposed using the A-V-H formulation. The current distribution in the superconducting coil is observed. The results are compared to the limited fault current measurements and simulations available in the literature.

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

Cited by 15 publications

References 21 publications

Fault Current Limiters in Power Systems: A Comprehensive Review

Fault Current Limiters in Power Systems: A Comprehensive Review

AC induction heating of ferromagnetic slabs saturated with a DC field

Simulation of a Superconductor Fault Current Limiter with finite element method using A-V-H formulation

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