Triggered Current Limiters - Their Arc Flash Mitigation and Damage Limitation Capabilities

Prigmore, Jay; Schaffer, John

doi:10.1109/tpwrd.2016.2524672

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…However, the DC coil flux linkage, in Fig. 11a, can be directly used to determine the induced back emf across the DC coil terminals as in (7). Fig.…”

Section: Coil Voltagementioning

confidence: 99%

“…Finite-element (FE) simulations are commonly used in the design stage for investigating and analysing the general performance and transient dynamic behaviour of PCFCLs in limiting fault current [1,7,8]. However, they can be considered as bulky and time-consuming, from several hours to days, even when simulating reduced scales of PCFCL in simple systems.…”

Section: Introductionmentioning

confidence: 99%

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Transient dynamic analyses of presaturated core fault current limiters through flux and inductance versus current modelling

Eladawy

Tarhuni²,

Metwally

2019

IET Electric Power Applications

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Here, the outcomes of experimental measurements and finite-element simulations are used to develop MATLAB/ Simulink models for evaluating the transient dynamic behaviour of the well-known dual-core presaturated core fault current limiter (PCFCL), either for single-or three-phase configurations. These models are based on calculating the total flux linkagecurrent characteristics of the AC coils at different levels of DC biasing current, taking into consideration the induced voltage across the DC coil terminals due to significant flux variation during the fault condition. On the other hand, the time-varying selfinductance and the self-inductance-current characteristics of the PCFCL are directly developed through Simulink modelling. It is worth mentioning that the self-inductance-current characteristic enables an important and quick design optimisation tool for PCFCL, where the dynamic inductance term significantly contributes to the total voltage drop across PCFCL in comparison to the static inductance. These total flux linkage and inductance versus current models can be directly used for modelling the dynamic transient behaviour of PCFCL when attached to any electrical transient programme used for analysing complex electrical power systems, with remarkable accuracy, quicker, and easier for various network scenarios and fault conditions.

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“…However, the DC coil flux linkage, in Fig. 11a, can be directly used to determine the induced back emf across the DC coil terminals as in (7). Fig.…”

Section: Coil Voltagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transient dynamic analyses of presaturated core fault current limiters through flux and inductance versus current modelling

Eladawy

Tarhuni²,

Metwally

2019

IET Electric Power Applications

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“…This upgrading process represents a great challenge due to the involved excessive cost and bulk time consuming. Accordingly, the technology of fault current limiter (FCL), in particular, compromises a leading candidate for limiting these high levels of fault current to be within the operating limits of the switchgear [1][2][3][4][5][6]. Meanwhile, multishot ability and compatibility with re-closers encourage the request of such FCL technology for protecting sensitive equipment against growing levels of fault current and increasing the reliability of distribution networks [7].…”

Section: Introductionmentioning

confidence: 99%

Compact designs of permanent‐magnet biased fault current limiters

Eladawy

Metwally

2020

IET Electric Power Applications

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This study proposes two novel compact designs of three-phase permanent-magnet biased fault current limiters (PMFCLs), namely, delta-shaped and compact cross delta PMFCLs. The actual representation of neodymium permanent magnet (PM) is based on the Jiles-Atherton modelling for the demagnetisation behaviour in the second quadrant of its actual non-linear B-H hysteresis loop. This PM is a preliminary representation validated through experimental measurements to ensure the trends and behaviour of PMFCL during its entire pre-fault, fault and post-fault recovery durations. Comprehensive time-domain, electromagnetic finite-element simulations, through COMSOL multiphysics package, have been conducted to study the relative effect of the constructive controlling parameters on the general performance of these proposed PMFCLs. However, the general performance of PMFCL can be characterised through the voltage drop and power losses of normal operation, and the fault current clipping ratio during the fault condition. Results reveal that the compact cross delta design has superior performance and enhanced capability of limiting any type of fault current, either symmetrical or unsymmetrical, with leading advantages of significant reduction of the voltage drop across PMFCL and power losses during the normal operation of the grid.

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“…Este tipo de operação impacta diretamente na elevação do nível das correntes transitórias nas linhas de distribuição do sistema durante um curto-circuito. Como muitas das subestações presentes no sistema já foram projetadas há algumas décadas, tem-se como consequência uma corrente de curto-circuito superior àquela suportada pelos equipamentos instalados nas mesmas [3]. Outro fator que contribui para o aumento da corrente de curto-circuito é a introdução de geração distribuída na rede, uma vez que, dependendo do tipo de gerador, na ocorrência de uma falta, o fluxo de corrente desta geração se soma à corrente de curtocircuito [4] [5].…”

Section: Introductionunclassified

Análise Técnica e Operacional de Limitadores de Correntes de Curto-Circuito

Bitencourt¹,

Koji²,

Scofano³

et al. 2020

Eletrônica de Potência

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Resumo -O aumento da demanda de energia elétrica e o crescimento da geração distribuída levam ao aumento da corrente de curto-circuito nas subestações. A maioria das subestações brasileiras, por exemplo, foram projetada décadas atrás, portanto seus equipamentos podem não suportar os novos níveis de corrente de curtocircuito. Para proteger os equipamentos instalados ou evitar altos custos de investimento na sua substituição destes, é possível instalar limitadores de corrente de curto-circuito. Este trabalho apresenta uma avaliação de duas topologias de limitadores através de análises dos aspectos técnicos e operacionais. Protótipos de pequena escala são empregados para entender melhor essas análises. As topologias estudadas são denominadas indutor série chaveado e circuito ressonante. A corrente de curto-circuito teve uma redução para a topologia indutor série chaveado de 69,7% e 72,6% para a topologia ressonante.Abstract -The increase in demand for electric power and the growing of distributed generation led to the increase of the short-circuit current in the substations. Most of these Brazilian substations, for example, were designed decades ago, so their equipment may not support the new short-circuit current levels. To protect the installed equipment or to avoid high investment costs in replacing them, it is possible to install fault current limiters. This work provides technical evaluation of two known topologies of fault current limiters through theoretical analyses of technical and operational aspects. Small-scale prototypes are employed to get a better understanding of those analyses. The studied topologies are called series switched-inductor and resonant circuit. The short-circuit current had a reduction for the switched-inductor topology of 69.7% and 72.6% for the resonant topology.

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Triggered Current Limiters - Their Arc Flash Mitigation and Damage Limitation Capabilities

Cited by 5 publications

References 6 publications

Transient dynamic analyses of presaturated core fault current limiters through flux and inductance versus current modelling

Transient dynamic analyses of presaturated core fault current limiters through flux and inductance versus current modelling

Compact designs of permanent‐magnet biased fault current limiters

Análise Técnica e Operacional de Limitadores de Correntes de Curto-Circuito

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