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为承受高电压与高电流等级,电阻型超导限流器的各个无感超导单元间不可避免地要进行串并联,由此会带来单元间失超不同步的问题.本文以单根344S超导带材在100ms的故障时间内,带材温度由92K升至300K时,失超电阻随温度的变化为基础,对两者间的关系进行了拟合.之后,以拟合函数为核心,利用Simulink的库中元件构建了单位长度344S带材的失超电阻模型并将其封装为模块.最后,搭建仿真电路模拟了故障时间内两个串联失超模块不同步失超的过程,仿真了分流电阻对失超不同步的改善并对分流电阻的选取进行了优化分析.结论证实,较小阻值的分流电阻更有利于改善失超特性.
To withstand the high voltage and high current levels, the resistive superconducting current limitless inductorless superconducting unit will inevitably be carried out in series and parallel, which will bring the unit out of synchronization asynchronously.In this paper, a single 344S superconducting tape In the failure time of 100ms, the tape temperature rises from 92K to 300K, the quenching resistance changes with the temperature as the basis, the relationship between the two was fitted.After the fitting function is At the core, the quench resistance model of unit length 344S strip is constructed by using Simulink’s library components.At last, a simulation circuit is built to simulate the process of two cascaded quench modules losing synchronization in the fault time, Simulation of shunt resistor to improve the out of synchronization and optimization of the shunt resistor selection.Conclusion confirmed that the smaller resistance shunt resistor is more conducive to improve the quench characteristics.