一种混合型桥式高温超导限流器的研究  

INVESTIGATION OF HYBRID BRIDGE TYPE HIGH TEMPERATURE SUPERCONDUCTING FAULT CURRENT LI MITER

作　　者：刘昕[1] 肖立业[2] 

机构地区：[1]中国科学院电工所,北京100080 [2]中国科学院研究生院,北京100039

出　　处：《低温物理学报》2005年第A02期983-988,共6页Low Temperature Physical Letters

基　　金：国家自然科学基金(项目编号:50225723)资助的课题~~

摘　　要：提出一种改进的桥式高温超导限流器拓扑结构,将不同高温超导体制成的限流电阻与限流电感同时串入桥式限流回路.正常状态下,限流电感与限流电阻均为超导态,限流器呈现低阻抗.故障状态下,限流电感保持超导态,利用电感抑制故障电流的快速增加;同时,由于故障电流超过限流电阻的临界电流值,超导体迅速失超导致线路阻抗突然增大,可以限制故障电流稳态值.本文进行了限流原理的理论分析,并进行了系统仿真.结果表明,该拓扑结构同时利用了超导体超导态的电感和失超后的电阻来限制故障电流,限流效果好,响应和复位速度快,是对桥式限流结构和混合型限流原理的有意义的探索.A new bridge type high temperature superconducting fault current limiter （SFCL） with a limiting impedance of superconductor serried in the limiting circuit is proposed, which could limit the peak value and the stable value of the fault current. In normal condition, the limiter is of low impendence as the limiting impedance and the inductance are both in superconducting state; when there comes a fault, the inductive coil will keep in the superconducting state to restrict the fault current from fast rising, while the limiting impendence change to the normal state, that means an impedance is series-connected immediately. The stable part of the fault current is limited. The principle of the current limiting was analyzed, and a system simulation was carried out. The results indicates the new hybrid bridge type SFCL using the inductance of the superconducting state and the impendence of the normal state of the superconductor could be more efficient in fault current limiting than the traditional bridge type SFCL.

关 键 词：超导体 短路电流 限流器 

分 类 号：TM471[电气工程—电器]