Dynamic Breakdown Characteristics of Pancake Coil Model for Resistive-Type Superconducting Fault Current Limiters
Dynamic Breakdown Characteristics of Pancake Coil Model for Resistive-Type Superconducting Fault Current Limiters
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DOI：
10.1109/tasc.2019.2909200
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发表时间：
2019-04
影响因子：
1.8
通讯作者：
N. Hayakawa;M. Mimbu;H. Kojima;S. Isojima;M. Kuwata
中科院分区：
文献类型：
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作者：
N. Hayakawa;M. Mimbu;H. Kojima;S. Isojima;M. Kuwata
为了可靠、合理地设计电阻式超导故障限流器（RSFCL）的绝缘，我们不仅研究了无气泡液氮（LN2）的本征击穿特性，而且研究了在RSFCL线圈淬火时瞬态气泡扰动下液氮的动态击穿特性。到目前为止，我们使用的基本模型是具有准均匀电场的球-平面电极系统。然而，当未来电网中引入RSFCL时，RSFCL的实际发展将采用一堆电场不均匀的煎饼线圈。本文设计并制作了RSFCL的煎饼线圈模型，并研究了煎饼线圈模型在LN2中的固有特性和动态BD特性。从非均匀电场作用下的本征强度和动态强度的体积效应两方面讨论了实验结果。
Toward the reliable and rational insulation design of resistive-type superconducting fault current limiters (RSFCL), we have been investigating not only the intrinsic breakdown (BD) characteristics of liquid nitrogen (LN2) without bubbles but also the dynamic BD characteristics of LN2 under the transient bubble disturbance at the quench of RSFCL coils. We have so far used a fundamental model such as sphere-plane electrode system with quasi-uniform electric field. However, when RSFCL will be introduced in a future electric power network, a stack of pancake coils with non-uniform electric field will be adopted for the practical development of RSFCL. In this paper, we designed and fabricated a pancake coil model for RSFCL, and investigated the intrinsic and dynamic BD characteristics of the pancake coil models in LN2. Experimental results are discussed in terms of the volume effect of intrinsic and dynamic BD strength under non-uniform electric field.