饱和铁心型高温超导故障限流器仿真建模及短路特征研究  

Modeling of Saturated Iron-Core High Temperature Superconductive Fault Current Limiter and Research on Its Short-Circuit Characteristic

作　　者：张彦涛[1] 秦晓辉[2] 项祖涛[2] 汤涌[2] 

机构地区：[1]天津大学电气与自动化工程学院,天津市南开区300072 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2014年第6期1562-1568,共7页Power System Technology

基　　金：国家电网公司基础性前瞻性科技项目(XT71-13-008)

摘　　要：在建立饱和铁心型高温超导故障限流器(saturated iron-core type high temperature superconductive fault current limiters,SR-SFCL)电磁暂态仿真计算模型基础上,对电网发生短路故障后SR-SFCL一次绕组与励磁绕组的电流、电压过渡过程进行了定量计算,深入研究了一次绕组与励磁绕组电流、电压的特征和相互关系,分析了限流器对短路电流交流分量初始值、冲击电流和稳态短路电流的限制效果。研究指出:SR-SFCL对稳态短路电流具有很好的限制作用,充分发挥限流效果的关键是缩短励磁回路的灭磁时间,灭磁时间与一次电流、灭磁电阻取值等因素关系密切。On the basis of establishing electromagnetic transient simulation model of saturated iron-core type high temperature superconductive fault current limiters （SR-SFCL）,the post-short-circuit transient process is quantitatively calculated,and the features of voltages and currents of primary winding and excitation winding and their interrelation are researched in depth; the limiting effects of SR-SFCL on initial value of AC component of short current,impact current and steady state short-circuit current are analyzed.Research results show that SR-SFCL can well limit the steady state short-circuit current; the key factor to fully play the role of SR-SFCL is to shorten the de-excitation time of excitation circuit,and the de-excitation time is closely related to such factors as primary current,the value of field-suppressing resistor and so on.

关 键 词：饱和铁心型高温超导限流器 电磁暂态 灭磁时间 短路电流 

分 类 号：TM713[电气工程—电力系统及自动化]