智慧建筑直流系统故障限流器拓扑及参数设计研究  

RESEARCH ON TOPOLOGY AND PARAMETER DESIGN OF FAULT CURRENT LIMITER IN SMART BUILDING DC SYSTEM

作　　者：侯杰 龚春阳 包俊 王志新[1] Hou Jie;Gong Chunyang;Bao Jun;Wang Zhixin(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;College of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Shanghai Xilong Technology Co.,Ltd.,Shanghai 201517,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海电力大学电气工程学院,上海200090 [3]上海禧龙科技股份有限公司,上海201517

出　　处：《太阳能学报》2023年第5期88-96,共9页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划资助项目(2018YFB1503000,2018YFB1503001);上海市科委科技计划项目(20dz1206100)。

摘　　要：含光充储用的智慧建筑直流系统具有更好的经济效益和环境效益。为避免短路过电流对智慧建筑直流系统造成危害,该文提出一种双向直流故障限流器拓扑,其特点为电流通过全桥换向阀组、单向流经全控开关管和各并联支路,故障后通过关断单向载流的开关管增大阻抗实现双向限流。分析该限流器的电阻、电感参数对电压应力和电流抑制能力的影响。其中,限流器参数在动作前对抑制效果影响较小;二极管和开关管的电压应力峰值与电阻取值几乎呈线性关系;动作后的电流抑制效果在电感增加时趋于饱和,而在电阻增加时抑制效果提升明显但受电压应力约束。采用Matlab/Simulink对限流器在375 V直流系统中的应用进行仿真验证,结果表明该限流器能满足智慧建筑直流系统故障电流抑制要求。To protect the smart building DC system from overcurrent after short-circuit faults,a DC fault current limiter(FCL)topology is proposed in this paper.The current is rectified by the full-bridge valve and unidirectionally flows through the full-controlled power electronic switches and parallel branches.The impedance is increased by turning off the switches after fault,enabling the FCL to suppress bidirectional fault currents.The influences of FCL resistance and inductance parameters on voltage stresses and current suppression ability are analyzed.The resistance and inductance parameters of the FCL have minor effect on current limiting before operation;peak voltage stresses of diodes and power electronic switches are almost linear with FCL resistance;after the FCL operation;the current suppression effect tends to saturate with higher inductance,while increases significantly with higher resistance but is restricted by voltage stresses.The application of proposed FCL in 375 V DC system is verified via simulation in Matlab/Simulink.The results show the proposed topology can meet the fault current suppression requirements of smart building DC system.

关 键 词：短路故障 故障保护 故障限流器 BIPV 智慧建筑 低压直流 

分 类 号：TM721.1[电气工程—电力系统及自动化]