摘要
饱和铁心故障限流器(saturated core fault current limiter,SFCL)是限制系统短路电流最有效的措施之一。为减小其直流偏置电源功率和附加能耗,除了采用超导线圈偏磁外,通过钕铁硼(Nd Fe B)永磁材料偏磁也逐渐受到业界的关注,但Nd Fe B的偏置能力和稳定性限制了其应用。针对现有方案的不足,提出了一种新型混合式饱和铁心故障限流器(hybrid type SFCL,HSFCL),基于电磁耦合的方法,研究了其拓扑原理及工作特性。新结构不仅能减小损耗,减小体积,保证限流效果,还能克服Nd Fe B偏磁能力不足和因涡流效应而产生的稳定性问题;正常工作情况下,Nd Fe B磁路不会有交变磁通;限流工作情况下,Nd Fe B永磁体的涡流损耗能降到传统结构的12.7%。通过麦克斯韦(Maxwell)场路耦合仿真和样机实验,证明了理论分析的正确性和新结构的有效性。
The saturated core fault current limiter（SFCL） is one of the most effective measures to limit the excess currents. To reduce the requirement of DC power and the additional energy consumption, the method of using permanent magnets（PMs） has got more and more concern in addition to the superconducting-coil-biased method. However, the finite flux density and thermal stability limit the application of Nd Fe D magnets in the conventional SFCLs. With this background, a novel hybrid type of SFCL（HSFCL） is proposed. The method of electromagnetic coupling is used to analyze the operation principle and characteristics. The HSFCL is efficient in fault clipping, reducing eddy current losses both under the normal condition and the fault clipping condition. Various FEA simulations and experiments proved the effectiveness and the reliability of the proposed configuration.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第23期6536-6543,6621,共8页
Proceedings of the CSEE
基金
湖北省科技支撑计划(2014BAA013)
中央高校基本科研业务费专项资金(2042015kf1004)~~
关键词
饱和铁心故障限流器
钕铁硼永磁材料
电磁耦合
涡流损耗
退磁
saturated core fault current limiter（SFCL）
Nd Fe B magnets
electromagnetic coupling
eddy current loss
demagnetization
