A Generic Real-Time Computer Simulation Model for Superconducting Fault Current Limiters and Its Application in System Protection Studies

This paper tests and analyzes the working capability of a resistive superconducting fault current limiter (SFCL) in a microgrid. The microgrid is a test-bed, consisting of a conventional power plant, two renewable energy sources in the form of wind-farm and solar-farm as two distributed generation (DG) units and five loads (i.e., industrial and domestic). Utilization of DG in mainstream is increasing and hence, various consequences that arise from DG penetration are to be considered accordingly. It is observed that DG penetration in existing distribution alters the fault current during a grid disturbance and hence imbalances the system. Based on this, the research work focuses on contribution of fault current from renewable energy sources in a microgrid, and how resistive SFCL offers positive result in minimizing the fault levels. The test-bed is modeled in MATLAB/Simulink, and simulation results are presented to show the effectiveness of resistive SFCL during various fault conditions. Ó 2015 Faculty of Engineering, Ain Shams University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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“…3. SFCL dimensions: The dimensions of the superconducting wires must be known, and are given in Table 3 [31].…”

Section: Resistive Sfcl Modelingmentioning

confidence: 99%

RETRACTED: Analysis of resistive SFCL in a test-bed microgrid

Khuntia

Samantaray

2015

Ain Shams Engineering Journal

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“…In this paper, we choose Bi2212 as the material of the SFCL. The transformation of the resistive SFCL can be divided into three states as follows [8,19,20]:…”

Section: Resistive Superconducting Fault Current Limitermentioning

confidence: 99%

Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter

et al. 2015

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A DC distribution system, which is suitable for access to distributed power generation and DC loads, is one of the development directions in power systems. Furthermore, it could greatly improve the energy efficiency and reduce the loss of power transportation. The huge short circuit current is always a great threat to the safety of the components, especially the capacitors and diodes. A resistive superconductive fault current limiter (SFCL), which could respond quickly once a fault happens and limit the fault current to a relatively low level, becomes a good solution to this problem. In this paper, the operational principle of the resistive SFCL is introduced first, and then, the DC short-circuit fault characteristic of the DC distribution system with the SFCL is analyzed and the effectiveness of the SFCL verified. In order to realize the selectivity of the protection in the DC distribution system with SFCL, a new transient current protection principle based on Ip (the peak value of the current) and tp (the transient time that the current takes to reach its peak value) is proposed. Finally, a model of a 10-kV DC distribution system with an SFCL is established and simulated in PSCAD/METDC. Simulation results have demonstrated the validity of the analysis and protection principle.

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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%

“…The effects of resistive SFCLs on power system protection system have been examined, for example in [5], [17] and [21], and location A (at the bus-tie) is likely to have the lowest impact on overcurrent protection [5]; the overcurrent protection settings are the same, regardless of whether or not the bustie circuit breaker is closed. However for location D, the total prospective fault current may be substantially reduced if the bus-tie circuit breaker is open.…”

Section: Consequences Of Sfcls On Protectionmentioning

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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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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A Generic Real-Time Computer Simulation Model for Superconducting Fault Current Limiters and Its Application in System Protection Studies

Cited by 52 publications

References 5 publications

RETRACTED: Analysis of resistive SFCL in a test-bed microgrid

RETRACTED: Analysis of resistive SFCL in a test-bed microgrid

Protection Principle for a DC Distribution System with a Resistive Superconductive Fault Current Limiter

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

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