桥式混合型磁饱和故障限流器  

Novel Bridge⁃type Hybrid Saturated⁃core Fault Current Limiter

作　　者：钟永恒 谢耀恒 刘赟 叶会生 袁佳歆[2] ZHONG Yongheng;XIE Yaoheng;LIU Yun;YE Huisheng;YUAN Jiaxin(State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410007,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网湖南省电力有限公司电力科学研究院,长沙410007 [2]武汉大学电气与自动化学院,武汉430072

出　　处：《高压电器》2020年第8期148-154,共7页High Voltage Apparatus

摘　　要：为在降低对直流绕组磁动势(DC⁃coil⁃generated magneto⁃motive force,DC MMF)需求的同时,保证限流器限流效果,文中分析了使用永磁体和直流电流混合励磁使铁心饱和的方法,并提出了一种新型桥式混合磁饱和型故障限流器(bridge⁃type hybrid saturated⁃core fault current limiter,BHFCL)的拓扑结构。在BHFCL中,使用了紧凑型的铁心结构和交直流共用绕组,能够有效降低装置成本和损耗,桥式结构中的故障限流电抗是为了保障限流效果。文中通过建立等效电磁回路模型对该新拓扑的基本原理与工作特性进行研究,并在ANSOFT中建立多种简单系统中的有限元仿真模型进行分析,并通过220 V/10 A实验样机进行试验验证所提结构的可行性。仿真与实验结果均表明,BHFCL能够有效降低能耗,同时只对系统正常运行时的电压降落以及限流器的限流效果产生很小的影响,限流效果良好,并且限流能力主要取决于桥式结构中的故障限流电抗。In order to reduce the high requirement for DC⁃coil⁃generated magneto⁃motive force(MMF)while ensure the effectiveness of limiting excess current,a new structure of bridge⁃type hybrid saturated⁃core fault current limiter(BHFCL)is designed by using both permanent magnets(PMs)and DC current to saturate the ferrite core.The com⁃pact structure and the shared coil of AC and DC current can reduce the cost and loss.The fault current limiting reac⁃tance(Lf)in the bridge is used to guarantee the fault clipping ability.The equivalent electromagnetic circuit is estab⁃lished to explain the principle and study the operating characteristics of the BHFCL.FEA simulation models are built in ANSOFT and a 220 V/10 A laboratory⁃scale prototype is made and tested to verify the effectiveness of BHF⁃CL.Experimental and simulation results validate that the BHFCL can reduce considerable energy consumption and has both low impedance during normal operation and good performance in limiting fault current.And its fault clip⁃ping performance depends mainly on the value of fault current limiting reactance.

关 键 词：饱和铁心限流器 钕铁硼永磁体 混合励磁 限流电抗 

分 类 号：TM471[电气工程—电器]