基于逆问题算法的ITER超导线缆断线率检测

Detection of ITER Superconductor Cables Breakage Rate Based on Inverse Problem Algorithms

为解决ITER超导线缆断线率检测问题,提出了基于线缆周边磁场反演重构导体内部电流分布状态的检测和信号处理方法。首先结合实际超导线缆形状及尺寸建立了多级绞缆螺旋导线模型,开发了绞缆螺旋导线周边磁场计算正问题和基于共轭梯度方法的导体内部电流重构逆问题计算方法和程序,通过大量数值模拟计算验证了所开发方法和程序的有效性,并分析了磁场测点分布对电流重构结果的影响规律。

In order to solve the problem of ITER superconducting cable breakage detection,a detection and signal processing method based on magnetic field inversion around the cables was proposed to reconstruct the current distribution state inside the conductor.Firstly,according to the shape and size of the actual superconductor cable,multi-stage complex helical cable models were established,and the calculation methods and programs of forward magnetic field calculation around the helical cable,the inverse current distribution reconstruction within the conductor based on conjugate gradient method were developed.The validity of the developed method and program was verified by a large number of numerical simulations,and the influence of the distribution of magnetic field measurement points on the results of current reconstruction was also analyzed.