Modeling the Non Linear Behavior of a Magnetic Fault Current Limiter

Wilson, Peter

doi:10.7716/aem.v4i3.265

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…This measurement holds essentially all of the data needed to define the effective current limiting regions for a specific SCFCL device. Adding this as a common method of analysis would greatly improve the comparison of PMFCL device capabilities compared to other modeling and measurement methods [23,24].…”

Section: Inductance Measurementsmentioning

confidence: 99%

Design Optimization of a Permanent-Magnet Saturated-Core Fault-Current Limiter

et al. 2019

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Designs of saturated-cores fault current limiters (FCLs) usually implement conducting or superconducting DC coils serving to saturate the magnetic cores during nominal grid performance. The use of coils adds significantly to the operational cost of the system, consuming energy, and requiring maintenance. A derivative of the saturated-cores FCL is a design implementing permanent magnets as an alternative to the DC coils, eliminating practically all maintenance due to its entirely passive components. There are, however, various challenges such as the need to reach deep saturation with the currently available permanent magnets as well as the complications involved in the assembly process due to very powerful magnetic forces between the magnets and the cores. This paper presents several concepts, achieved by extensive magnetic simulations and verified experimentally, that help in maximizing the core saturation of the PMFCL (Permanent Magnet FCL), including optimization of the permanent magnet to core surface ratios and asymmetrical placement of the permanent magnets, both creating an increase in the cores’ magnetic flux at crucial points. In addition, we point to the importance of splitting the AC coils to leave the center core point exposed to best utilize their variable inductance parameters. This paper also describes the stages of design and assembly of a laboratory-scale single phase prototype model with the proposed PMFCL design recommendations, as well as an analysis of real-time results obtained while connecting this prototype to a 220 V grid during nominal and fault states.

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Section: Inductance Measurementsmentioning

confidence: 99%

Design Optimization of a Permanent-Magnet Saturated-Core Fault-Current Limiter

et al. 2019

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Transient Modeling and Performance Analysis of a Passive Magnetic Fault Current Limiter Considering JA Hysteresis Model

Das

Santra

Choudhury

et al. 2019

Electric Power Components and Systems

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Estimating and minimizing the eddy current loss in a permanent magnetic fault current limiter

Das

Santra

Choudhury

et al. 2023

International Journal of Emerging Electric Power Systems

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This research paper represents the estimation and reduction of eddy current loss in a Magnetic Fault Current Limiter (MFCL). The nonlinear model of the device is established using electromagnetic coupled circuit supported by Finite Element Model. The current limiting performance of the MFCL is investigated by simulation study as well as laboratory testing. It is further observed that a significant amount of eddy current loss takes place inside the core and permanent magnet of the device. Different methods (shorting ring, lamination of permanent magnet and variation of magnet length) are proposed to reduce the eddy current. The advantages and disadvantages of these methods are discussed. Some design modifications are also proposed to minimize the temperature rise caused by the eddy current.

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Modeling the Non Linear Behavior of a Magnetic Fault Current Limiter

Cited by 3 publications

References 20 publications

Design Optimization of a Permanent-Magnet Saturated-Core Fault-Current Limiter

Design Optimization of a Permanent-Magnet Saturated-Core Fault-Current Limiter

Transient Modeling and Performance Analysis of a Passive Magnetic Fault Current Limiter Considering JA Hysteresis Model

Estimating and minimizing the eddy current loss in a permanent magnetic fault current limiter

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