应用于直流微电网的分级固态限流器研究  

Hierarchical Solid-state Current Limiter for DC Microgrid Applications

作　　者：吴铁洲[1] 王治坤 WU Tie-zhou;WANG Zhi-kun(Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学,太阳能高效利用及储能运行控制湖北省重点实验室,湖北武汉430068

出　　处：《电力电子技术》2024年第4期85-88,94,共5页Power Electronics

基　　金：国家自然科学基金(51677058)。

摘　　要：针对固态断路器面临故障等级超出断路器遮断容量,威胁断路器故障隔离的问题,研究了基于晶闸管的直流分级固态限流器以减少固态断路器对遮断容量的需求,其具备分级限流、故障隔离后电抗器自旁路的功能。基于600 V直流微电网的场景,通过公式推导、计算参数配置,对限流器的工作过程进行仿真验证并对不同参数下的故障隔离速度及限流幅值进行对比分析,仿真结果表明,该限流器投入后,故障电流下降了35.62%以上,有效减少对固态断路器遮断容量的需求。To address the problem of solid-state circuit breakers facing fault levels exceeding the circuit breaker shading capacity and threatening circuit breaker fault isolation,a thyristor-based DC graded solid-state current limiter is studied to reduce the requirement for solid-state circuit breaker shading capacity with graded current limiting and reactor self-bypass after fault isolation.Based on the scenario of 600 V DC microgrid,the working process of the current limiter is simulated and verified through formula derivation,calculation of parameter configuration and comparative analysis of fault isolation speed and current limiting amplitude under different parameters.The simulation results show that the fault current decreases by more than 35.62%after the current limiter is put into operation,effectively reducing the demand for solid-state circuit breaker shading capacity.

关 键 词：固态限流器 分级限流 微电网 

分 类 号：TM561[电气工程—电器]