Quench-induced partial discharge characteristics of HTS cables
Quench-induced partial discharge characteristics of HTS cables
复制标题
高温超导电缆的淬火引起的局部放电特性
DOI：
10.1088/1742-6596/97/1/012053
复制
发表时间：
2008
影响因子：
1.8
通讯作者：
M. Hirose
中科院分区：
文献类型：
--
作者：
N. Hayakawa;S. Ueyama;H. Kojima;F. Endo;Y. Ashibe;T. Masuda;M. Hirose
讨论了高温超导电缆失超时的局部放电特性，在高温超导电缆的工作电压下，失超引起的热应力会瞬时叠加在电场应力上。这种在热/电复合应力下的电绝缘特性可称为高温超导电缆的“失超诱发局部放电特性”，高温超导电缆的可靠绝缘设计应考虑这一特性。使用同轴高温超导电缆样品的实验结果表明，可以产生猝灭诱导的PD，即使在固有的或静态的PD起始电压（PDIVsta）没有猝灭。在过冷条件下，对不同液氮压力和故障持续时间下的热/电复合应力水平进行了定量分析。
This paper discusses the partial discharge (PD) characteristics of HTS cables under quench condition, where the thermal stress due to quench would be transiently superposed on the electric field stress under the operating voltage of HTS cables. Such electrical insulation characteristics under thermal/electrical combined stress can be referred to as the "quench- induced PD characteristics" of HTS cables, which should be taken into account for the reliable insulation design of HTS cables. Experimental results using coaxial HTS cable samples revealed that the quench-induced PD could be generated, even under the intrinsic or static PD inception voltage (PDIVsta) without the quench. The criteria of the thermal/electrical combined stress level for quench-induced PD inception were quantified for different LN2 pressures and fault durations under sub-cooled condition.