MV Power Grids Integration of a Resistive Fault Current Limiter Based on HTS-CCs

Colangelo, Daniele; Dutoit, B.

doi:10.1109/tasc.2012.2233532

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…Since their initial discovery in 1986, high-temperature superconductors [1] have made a long way toward practical use in applications, such as record-field solenoids [2][3][4], energy storage [5], fault current limiters [6][7][8] and transmission lines [9,10]. More demanding applications, such as high-field magnets for particle accelerators, are presently on the horizon [11][12][13][14][15], where HTS conductors will operate close to their stress limits, and will have to satisfy necessary mechanical, electromagnetic and thermal stability criteria.…”

Section: Introductionmentioning

confidence: 99%

Quench Detection and Protection for High-Temperature Superconductor Accelerator Magnets

Marchevsky

2021

Instruments

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High-temperature superconductors (HTS) are being increasingly used for magnet applications. One of the known challenges of practical conductors made with high-temperature superconductor materials is a slow normal zone propagation velocity resulting from a large superconducting temperature margin in combination with a higher heat capacity compared to conventional low-temperature superconductors (LTS). As a result, traditional voltage-based quench detection schemes may be ineffective for detecting normal zone formation in superconducting accelerator magnet windings. A developing hot spot may reach high temperatures and destroy the conductor before a practically measurable resistive voltage is detected. The present paper discusses various approaches to mitigating this problem, specifically focusing on recently developed non-voltage techniques for quench detection.

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Section: Introductionmentioning

confidence: 99%

Quench Detection and Protection for High-Temperature Superconductor Accelerator Magnets

Marchevsky

2021

Instruments

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“…The simulated RFCL has the same specifications as the limiter developed within the European project ECCOFLOW. Similarly to our previous work [22], the RFCL is integrated into a MV grid where it operates in busbar coupling configuration. The MV grid is characterized by the real parameters of a HV/MV substation operated by the Spanish utility company Endesa [23] on the Balearic island of Mallorca.…”

Section: Analysis Of the Nzpv Enhancementmentioning

confidence: 99%

Impact of the Normal Zone Propagation Velocity of High-Temperature Superconducting Coated Conductors on Resistive Fault Current Limiters

Colangelo

Dutoit

2015

IEEE Trans. Appl. Supercond.

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Abstract-The engineering critical current (Ic) of the high temperature superconducting coated conductors (HTS-CCs), today available on the market, is not a uniform parameter and varies significantly along the length of the conductors. Moreover, commercial HTS-CCs have a low normal zone propagation velocity (NZPV). This property, together with the Ic inhomogeneity, exposes the HTS-CCs to local thermal instabilities. A crucial challenge for the design of resistive fault current limiters (RFCLs) based on HTS-CCs is to avoid the thermal runaway of the conductors, and in this respect the enhancement of the NZPV is a promising solution. In the recent years, several methods have been proposed and many and various techniques are now available to enhance the NZPV. Whichever will be the best technical solution to improve NZPV of HTS-CCs, our aim is to quantify the impact the enhancement of NZPV will have on the design of RFCLs based on HTS-CCs. For this reason, we used numerical models to analyze the effects of the enhancement of NZPV on the limitation performance of a RFCL integrated in a medium voltage (MV) power grid. In this manuscript, we quantify the benefits the enhancement of the NZPV will have on the next generation of HTS-CC-based RFCLs for MV grids.

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“…(2005), in which both the physical properties and the real dimensions of superconductors were considered. A similar model was then built by Colangelo and Dutoit (2013) in order to simulate the behaviour of the SFCL designed in the ECCOFLOW project. Using this model the quenching action of the SFCL is no longer pre-defined.…”

Section: Introductionmentioning

confidence: 99%

Power flow analysis and optimal locations of resistive type superconducting fault current limiters

et al. 2016

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Based on conventional approaches for the integration of resistive-type superconducting fault current limiters (SFCLs) on electric distribution networks, SFCL models largely rely on the insertion of a step or exponential resistance that is determined by a predefined quenching time. In this paper, we expand the scope of the aforementioned models by considering the actual behaviour of an SFCL in terms of the temperature dynamic power-law dependence between the electrical field and the current density, characteristic of high temperature superconductors. Our results are compared to the step-resistance models for the sake of discussion and clarity of the conclusions. Both SFCL models were integrated into a power system model built based on the UK power standard, to study the impact of these protection strategies on the performance of the overall electricity network. As a representative renewable energy source, a 90 MVA wind farm was considered for the simulations. Three fault conditions were simulated, and the figures for the fault current reduction predicted by both fault current limiting models have been compared in terms of multiple current measuring points and allocation strategies. Consequently, we have shown that the incorporation of the E–J characteristics and thermal properties of the superconductor at the simulation level of electric power systems, is crucial for estimations of reliability and determining the optimal locations of resistive type SFCLs in distributed power networks. Our results may help decision making by distribution network operators regarding investment and promotion of SFCL technologies, as it is possible to determine the maximum number of SFCLs necessary to protect against different fault conditions at multiple locations.

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MV Power Grids Integration of a Resistive Fault Current Limiter Based on HTS-CCs

Cited by 5 publications

References 8 publications

Quench Detection and Protection for High-Temperature Superconductor Accelerator Magnets

Quench Detection and Protection for High-Temperature Superconductor Accelerator Magnets

Impact of the Normal Zone Propagation Velocity of High-Temperature Superconducting Coated Conductors on Resistive Fault Current Limiters

Power flow analysis and optimal locations of resistive type superconducting fault current limiters

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