电网技术2023，Vol.47Issue(12)：4887-4896,10.DOI:10.13335/j.1000-3673.pst.2023.1170
考虑短路电流非周期分量影响的磁偏置型超导故障限流器设计方法及其限流特性分析
Designing and Current Limiting Characteristics of Magneto-biased Superconducting Fault Current Limiter Considering DC Component of Short-circuit Current
摘要
Abstract
The rapid growth of power loads makes the fault current levels in the power system continue to rise,even exceeds the interrupting capacity of the existing circuit breakers.To effectively limit the fault current,the Superconducting Fault Current Limiters(SFCLs)are gradually being put into practice.The SFCL presents zero impedance during the normal operation but rapidly turns to high impedance when a fault occurs.This characteristic can be as an ideal choice to be used along with the circuit breakers to improve the operational safety of the power systems.By introducing a magneto-biased superconducting fault current limiter(MBSFCL),this paper proposes a design method of the MBSFCL considering the DC component of short-circuit current,which may have a certain guiding significance for the manufacture of an MBSFCL.The feasibility of the proposed method is verified by building a simulation model,and the current-limiting characteristics of the MBSFCL are analyzed in depth.The effects of different DC components on the interrupting of the circuit breaker,and the effects of the current-limiting effects of the variations of L or R parameters in the MBSFCL on the short-circuit current and its components are discussed.The analytical results show that the DC component must be considered in the proposed MBSFCL design method and that the variation of the R parameter of the MBSFCL has a more significant effect on the short-circuit current suppression.关键词
超导限流器/磁偏置/非周期分量/断路器/开断电流Key words
superconducting fault current limiter(SFCL)/magneto-biase/DC component/circuit breaker/interrupting current分类
信息技术与安全科学引用本文复制引用
李超,吴琪,李斌,诸嘉慧,陈盼盼,韦德福,信赢..考虑短路电流非周期分量影响的磁偏置型超导故障限流器设计方法及其限流特性分析[J].电网技术,2023,47(12):4887-4896,10.基金项目
国家电网有限公司科技项目(5500-202228145A-1-1-ZN).Project Supported by the Science and Technology Project of State Grid Corporation of China(5500-202228145A-1-1-ZN). （5500-202228145A-1-1-ZN）
