新型桥式超导故障限流器的仿真研究  

Simulation study of a new bridge-type superconducting fault current limiter

作　　者：马幼捷[1] 王辉[1] 陈岚[1] 龚娟[1] 周雪松[1] 田密[1] 

机构地区：[1]天津理工大学自动化学院,天津300191

出　　处：《中国电力》2009年第2期19-23,共5页Electric Power

基　　金：国家自然科学基金资助项目(50877053);天津市重点科技攻关项目(033186611)

摘　　要：普通桥式超导故障限流器(Superconducting Fault Current Limiter,SFCL)只能限制故障短路电流的峰值,不能限制短路电流的稳态值。应用电力电子技术对桥式超导限流器的结构进行改进,能在保持原有桥式限流器优点的基础上,有效限制短路电流的稳态值。针对一种新型桥式SFCL,在分析其限流过程的基础上,利用PSCAD仿真系统分析发生三相短路故障时的限流情况,并对影响其限流效果的限流电阻、超导电感及电阻投切装置的响应时间3个主要参数进行了进一步的讨论。结果表明,该限流器在配电网中不仅能有效地限制短路故障电流,抑制母线电压跌落,而且不用更换现有的开关设备,具有较大的经济效益。The normal bridge-type superconducting fault current limiter （SFCL） can limit the peak value of fauh current but not the state value of fault current. Using electric power electronic technology to rectify the structure of the bridge-type SFCL is very effective. It also remains the advantage of the normal bridge-type SFCL. After the deeply analysis on the limiting current process of a new bridge-type SFCL, PSCAD was used to simulate the limiting current situation when three-phase short-circuit fault happened in the power system. Then three main parameters, which affect current limiting, were further discussed. It is proved that the new bridge-type of SFCL can not only restrain the fault current and the bus voltage drop, but also needn＇t replace the existing switchgears. So it is considered to have greater economic benefits.

关 键 词：超导故障限流器(SFCL) 桥式 三相短路故障 母线电压跌落 

分 类 号：TM471[电气工程—电器]