基于空心超导变压器的可控阻抗型限流器试验  

Test of Controllable Impedance Type Fault Current Limiter Based on Air-core Superconducting Transformer

作　　者：陈磊[1] 唐跃进[1] 陈楠[1] 黎志[1] 宋萌[1] 石晶[1] 程时杰[1] 胡毅[2] 陈轩恕[2] 

机构地区：[1]华中科技大学超导电力科学研究与发展中心,湖北省武汉市430074 [2]国网电力科学研究院,湖北省武汉市430074

出　　处：《电力系统自动化》2008年第18期20-23,95,共5页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217906);国家高技术研究发展计划(863计划)资助项目(2007AA03Z243)~~

摘　　要：可控阻抗型超导限流器是一种新型的故障限流器,它由空心超导变压器和脉宽调制(PWM)变流器组成。系统正常运行时,变流器的输出电流与系统电流满足一定关系,使得超导变压器一次侧两端电压被补偿为0,限流器对系统无影响。当发生短路故障时,通过控制变流器输出电流的幅度和相位来调节限流器等效接入系统的阻抗,进而实现限流目的。为检验该限流器的有效性及空心超导变压器的可行性,进行了小型样机的试验研究。试验结果与理论分析相符,这对下一步开展可控阻抗型超导限流器在实际电力系统中的应用有重要指导意义。Controllable impedance type superconducting fault current limiter （SFCL） is a novel type of fault current limiter （FCL） which consists of an air-core superconducting transformer and a pulse-width modulation （PWM） converter. In normal state, the output current of PWM converter will be adjusted to ensure that the primary voltage of the transformer is compensated to zero. As a result, the SFCL has no influence on the main circuit. In the ease of.short circuit, the currentlimiting impedance in series with main circuit can be changed by adjusting PWM converter＇ s output current in the amplitude and phase angle, to suppress the fault current. In order to investigate the validity of this FCL and the feasibility of air-core superconducting transformer, a small prototype system is tested, Experimental results are consistent with principle analysis, which is valuable for the further research of installing this type SFCL into actual electric power system.

关 键 词：可控阻抗型超导限流器 空心超导变压器 短路电流 限流阻抗 

分 类 号：TM471[电气工程—电器] TM265[一般工业技术—材料科学与工程]