Quenching detection system used in superconducting magnet under pulsed field and method thereof

Abstract

The invention discloses a quenching detection system and a method which are suitable for being used under a rapidly alternating magnetic field. The system comprises: a quenching detection sensor, a fiber optic isolator, a secondary compensation processing unit and a quenching detector. The quenching detection sensor is connected with the quenching detector through the fiber optic isolator and the secondary compensation processing unit successively. The secondary compensation unit is externally connected with a plurality of current sensors which are installed on an alternating power supply. The quenching detection sensor sends an obtained detection voltage signal to the secondary compensation processing unit after the signal is passed through the fiber optic isolator. The detection voltage signal is accumulated with the detection voltage signal which is sent to the secondary compensation processing unit and is acquired by the current sensors installed on the alternating power supply so as to obtain the effective detection voltage signal. And then the effective detection voltage signal is discriminated by the quenching detector. By using the system and the method of the invention, a large superconducting magnet can perform reliable quenching detection under the condition of rapid changes of working current and the magnetic field.

Description

technical field [0001] The invention relates to a novel quench detection system and method applied to superconducting magnets, and is especially suitable for quench detection under a pulse field. Background technique [0002] A major breakthrough in the research of controllable thermonuclear fusion energy is the successful application of superconducting technology to coils that generate strong magnetic fields in Tokamak. The all-superconducting tokamak can achieve steady-state operation, and by greatly improving the constraints under steady-state operating conditions, it can lay the engineering technology and physical foundation for future steady-state, advanced fusion reactors. Future commercial reactors must be fully superconducting in order to achieve steady-state operation. [0003] The traditional superconducting coil superconducting protection signal detection methods mainly include: voltage detection method, temperature rise detection method, pressure detection m...

AI Technical Summary

Problems solved by technology

This detection method has the following defects: 1: There are quench detection blind spots. If symmetrical quench occurs at both ends of the bridge, there will be protection blind spots or detection delays; The induced interference generated is only suitable for quench detection in a steady-state field or a slow-changing self-magnetic field (under the current change rate of several A per second) and a weakly influenced surrounding magnetic field environment

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