不同于低温超导体,在高温超导线圈中,一定体积内的热积累是造成失超的较主要原因.因此,在遭遇大电流冲击时,线圈仍有可能保持稳定.在本文中,我们通过数值求解,作出了在大电流冲击条件下高温超导线圈的热稳定边界.求解结果表明,存在分别对应两种热积累情况的热稳定边界.为安全起见,应用在高温超导电力设备中的线圈应采取热稳定化路线设计.
Unlike the low temperature superconductors, heat accumulation in a specific volume is more likely the main cause of quenches for the high temperature superconductive (HTS) coils. Hence the coil can be still stable against a pulsed current shock. In this paper, the thermal stability of the HTS coil against pulsed high current shock is evaluated numerically. The results show two groups of thermal stability borders corresponding to two types of heat accumulation. For safety, the coil in the HTS power devices should be designed as thermal stabilized.
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