冷绝缘高温超导电缆屏蔽层电流测量

Current measurement of shielding layers in cold dielectric HTS cable

根据短路冲击中冷绝缘高温超导电缆屏蔽层电流测量的实际需要,设计并制作了一种低温下使用的罗氏线圈,成功地实现了对屏蔽层电流的测量,并将屏蔽层电流与导体层电流进行了比较,比值约为80%。测量结果表明:罗氏线圈的测量准确度满足要求,且对上升时间较短(0.1 s)的大电流有很好的响应速度;但由于线圈未加积分装置,导体层电流与屏蔽层电流之间存在90°相位差。

Based on the actual requirement in the current measurement of shielding layers in cold dielectric （CD） high temperature superconducting （HTS） cable, a low temperature Rogowski coil was designed and produced, which was successfully applied to the current measurement of shielding layers in CD HTS cable. The ratio of shielding layer current to conductor layer current is about eighty percent. According to the result of measurement, the accuracy of Rogowski coil meets the acquirement and the response speed of that is excellent to the large current which has a short rise time. However, due to lack of integrator, there is phase difference of 90° between shielding layer current and conductor layer current.