Modeling Thermal Process in a Resistive Element of a Fault Current Limiter

Dul'kin, I. N.; Yevsin, D.V.; Fisher, L. M.; Иванов, В. П.; Kalinov, A. V.; Sidorov, V. A.

doi:10.1109/tasc.2008.917544

Cited by 10 publications

(8 citation statements)

References 8 publications

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“…Hence, the SFCL model intrinsically reacts to current magnitudes in each individual phase and does not have to be configured to operate at a specific time; this is a valuable refinement when compared to other models (such as [3], [10], [11], [13] and [14]), which may tend to overestimate the reduction in peak make fault current and lead to inaccurate transient results until the final SFCL resistance value is reached. The model used in this study is effective at estimating the peak make fault current reduction, yet it avoids the complexities of thermo-electric models such as those described in [15], [16] and [17]. Equation (1) describes the model used in the studies presented in this paper, where: R 0 is the maximum SFCL resistance value; is the time constant which determines how quickly the SFCL reaches R 0 ; and i SFCL (t) is the instantaneous phase current in the SFCL.…”

Section: Resistive Sfcl Modelmentioning

confidence: 99%

“…Table 5 illustrates that the total energy dissipated in the SFCL (at location A, for fault F1), due to ohmic heating, is reduced for higher values of SFCL resistance because of the significant reduction in fault current, as calculated by Equation (3) where t f is the time of fault occurrence and t c is the time when the fault is cleared. This is important because it will affect the length of the recovery time of a resistive SFCL [15]. Note that energy dissipation may be substantially lower if an impedance is placed in parallel with the SFCL [5] and external to the cryogenic environment, but this will also affect the current limitation properties [22].…”

Section: Non-fault Transients and Their Potential To Cause Sfcl Mal-omentioning

confidence: 99%

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Superconducting fault current limiter application in a power-dense marine electrical system

Blair

Booth

Elders

et al. 2011

IET Electr. Syst. Transp.

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This version is available at https://strathprints.strath.ac.uk/40245/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.This paper is a preprint of a paper accepted by IET Electrical Systems in Transportation and is subject to Institution of Engineering and Technology Copyright. When the final version is published, the copy of record will be available at IET Digital Library. AbstractPower-dense, low-voltage marine electrical systems have the potential for extremely high fault currents. Superconducting fault current limiters (SFCLs) have been of interest for many years and offer an effective method for reducing fault currents. This is very attractive in a marine vessel in terms of the benefits arising from reductions in switchgear rating (and consequently size, weight and cost) and damage at the point of fault. However, there are a number of issues that must be considered prior to installation of any SFCL device(s), particularly in the context of marine applications. Accordingly, this paper analyses several such issues, including: location and resistance sizing of SFCLs; the potential effects of an SFCL on system voltage, power and frequency; and practical application issues such as the potential impact of transients such as transformer inrush. Simulations based upon an actual vessel are used to illustrate discussions and support assertions. It is shown that SFCLs, even with relatively small impedances, are highly effective at reducing prospective fault currents; the impact that higher resistance values has on fault current reduction and maintaining the system voltage for 1 Dr Nand Singh is now with Mott MacDonald Ltd., Croydon, CR0 2EE, U.K 2 other non-faulted elements of the system is also presented and it is shown that higher resistance values are desirable in many cases. It is demonstrated that the exact nature of the SFCL application will depend significantly on the vessel's electrical topology, the fault current contributio...

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Section: Resistive Sfcl Modelmentioning

confidence: 99%

Section: Non-fault Transients and Their Potential To Cause Sfcl Mal-omentioning

confidence: 99%

Superconducting fault current limiter application in a power-dense marine electrical system

Blair

Booth

Elders

et al. 2011

IET Electr. Syst. Transp.

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“…It is assumed that the current rating is based on the prospective temperature of the wire and the permissible time for which the temperature can be experienced, as dictated by I unit = (dT unit C v Volume unit ) / R unit t f , where dT unit is the temperature change and C v is the volumetric specific heat capacity of the superconductor. This assumes an adiabatic process but an alternative, non-adiabatic equation is derived in [4]. The required resistance rating of an SFCL can be obtained by connecting individual superconductor units in series; the current rating can be increased by connecting units in parallel, equivalent to increasing the cross-sectional area of the wire and thereby reducing the total resistance.…”

Section: Relationship Of Sfcl Power Dissipation To Minimum Volumementioning

confidence: 99%

“…Ideally, the resistance of an SFCL should be chosen to limit the fault current as much as possible. Not only does this benefit the electrical system through reduction in the potentially damaging effects of high fault currents, the primary purpose of the SFCL, but increasing the limitation of the fault current has a consequence of shortening the recovery time of the SFCL by reducing the energy dissipated in the resistance of the SFCL [4]. Furthermore, excessive heat dissipation may damage the SFCL and cause undue vaporization of the coolant [5], so increasing limitation is attractive from many perspectives.…”

Section: Introductionmentioning

confidence: 99%

“…Singleand three-phase analyses are presented. Furthermore, the volume of superconductor used in the SFCL must be sufficient to absorb the prospective energy dissipation [4]. Another requirement is that the dimensions of the superconductor must ensure that the SFCL discriminates between fault current, for which it must operate, and load current, for which it must not operate.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Energy Dissipation in Resistive Superconducting Fault-Current Limiters for Optimal Power System Performance

Blair

Booth

Singh

et al. 2011

IEEE Trans. Appl. Supercond.

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Fault levels in electrical distribution systems are rising due to the increasing presence of distributed generation (DG) and this rising trend is expected to continue in the future. Superconducting fault current limiters (SFCLs) are a promising solution to this problem. This paper describes factors that govern the selection of the optimal SFCL resistance. The total energy dissipated in an SFCL during a fault is particularly important for estimating the recovery time of the SFCL; the recovery time affects the design, planning, and operation of electrical systems using SFCLs to manage fault levels. Generic equations for the energy dissipation are established, in terms of: fault duration, SFCL resistance, source impedance, source voltage, and fault inception angle. Furthermore, using an analysis that is independent of superconductor material, it is shown that the minimum required volume of superconductor varies linearly with SFCL resistance but, for a given level of fault current limitation and power rating, is independent of system voltage and superconductor resistivity. Hence, there is a compromise between a shorter recovery time, which is desirable, and the cost of the volume of superconducting material needed for the resistance required to achieve a shorter recovery time.

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Transient boiling crisis in liquid nitrogen. Influence of heater size and heating rate

Delov

Kuzmenkov

Lavrukhin

et al. 2020

International Journal of Heat and Mass Transfer

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Modeling Thermal Process in a Resistive Element of a Fault Current Limiter

Cited by 10 publications

References 8 publications

Superconducting fault current limiter application in a power-dense marine electrical system

Superconducting fault current limiter application in a power-dense marine electrical system

Analysis of Energy Dissipation in Resistive Superconducting Fault-Current Limiters for Optimal Power System Performance

Transient boiling crisis in liquid nitrogen. Influence of heater size and heating rate

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