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Limiting mechanism and equivalent analytical model of a bridge-type saturated core fault current limiter

机译：桥式饱和铁心故障限流器的限制机理及等效解析模型

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摘要

A saturated core fault current limiter (SCFCL) is a promising device to limit the fault current. Due to the non-linear characteristics of the ferromagnetic materials and the AC to DC coupling effect, traditional equivalent models of SCFCL are not accurate. Moreover, the impact of the DC biasing magneto-motive force (MMF) attenuation on the limiting mechanism is lack of attention. Hence, this paper proposes an accurate limiting mechanism and an equivalent analytical model of a bridge-type SCFCL (BSFCL), considering the AC to DC coupling effect and the DC MMF attenuation. This paper presents the limiting mechanism of the BSFCL based on three working regions. Then an equivalent analytical model considering the coupling effect and the DC MMF attenuation characteristics is established. Finally, the limiting mechanism and an equivalent analytical model of BSFCL are validated by the analytical model method, electromagnetic simulation and experiments. The simulation and experimental results demonstrate the effectiveness and accuracy of the proposed method.
机译：饱和铁心故障电流限制器（SCFCL）是一种有希望的设备，用于限制故障电流。由于铁磁材料的非线性特性以及交流到直流的耦合效应，传统的SCFCL等效模型并不准确。此外，直流偏置磁电动势（MMF）衰减对限制机构的影响值得关注。因此，本文提出了一种精确的限制机制和等效的桥式SCFCL（BSFCL）分析模型，其中考虑了AC到DC耦合效应和DC MMF衰减。本文提出了基于三个工作区域的BSFCL的限制机制。然后建立了考虑耦合效应和DC MMF衰减特性的等效分析模型。最后，通过解析模型方法，电磁仿真和实验验证了BSFCL的极限机理和等效解析模型。仿真和实验结果证明了该方法的有效性和准确性。

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