Quench Detection of Insulated HTS Magnets Based on Co-wound Tape Compensation Method and Balance Bridge Compensation Method

Quench detection is vital for the safe operation of insulated high-temperature superconducting (HTS) magnets. However, due to slow quench propagation and susceptibility of terminal voltage to current interference, it is difficult to detect quench for an insulated HTS magnet. Co-wound tape (CWT) compensation method and the balance bridge (BB) compensation method show improvements to the voltage method. Both methods can eliminate the noise generated by induced voltage with fast response and high convenience. In this work, the CWT compensation method and BB compensation method are used to study the quench detection of an insulated HTS magnet under various operating conditions. CWT compensation and BB compensation methods, having a signal-to-noise ratio of 45 and 39 dB, respectively, outperform the conventional voltage detection method (− 13 dB).