高温超导线圈交流通流失超检测方法的实验研究

Research of quench detection for HTS coil with AC current

目前的失超检测的方法多针对超导线圈的直流工作状态。在交流损耗等实验研究及部分电力应用中,超导线圈将工作在交流通流状态。为了保障这种情况下超导线圈的安全,需要进行交流失超检测方法的研究。设计了用于高温超导线圈交流通流的失超检测方法,将桥路交流电压信号转换为直流信号后,对工作在交流通流情况下的超导线圈的失超状态进行判断。通过搭建实验平台进行了相关的实验。实验结果显示,采用这种方法能够有效地对工作在交流情况下的超导线圈进行失超检测。

At present most quench detection methods focus on the DC operating state of high temperature superconducting （HTS） coils. Nevertheless,HTS coils always work in AC state in AC losses measurement experiments as well as some power ap- plications. In order to ensure the safety of HTS coils in this case, it is necessary to carry out research on AC quench detection methods. In this paper,a AC quench detection method for HTS coils was proposed. This method judged AC quench state of HTS coils after converting AC bridge voltage into DC signal. Finally, several experiments were carried out. The results show that this proposed method can effectively detect the quench state of HTS coils in AC working state.