智慧建筑直流系统故障限流器拓扑及参数设计研究

侯杰; 龚春阳; 包俊; 王志新

doi:10.19912/j.0254-0096.tynxb.2021-1564

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (5) : 88-96. DOI: 10.19912/j.0254-0096.tynxb.2021-1564

智慧建筑直流系统故障限流器拓扑及参数设计研究

侯杰¹, 龚春阳², 包俊³, 王志新¹

作者信息 +

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

Hou Jie¹, Gong Chunyang², Bao Jun³, Wang Zhixin¹

Author information +

文章历史 +

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。

Abstract

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.

导出引用

侯杰, 龚春阳, 包俊, 王志新. 智慧建筑直流系统故障限流器拓扑及参数设计研究[J]. 太阳能学报. 2023, 44(5): 88-96 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1564

Hou Jie, Gong Chunyang, Bao Jun, Wang Zhixin. RESEARCH ON TOPOLOGY AND PARAMETER DESIGN OF FAULT CURRENT LIMITER IN SMART BUILDING DC SYSTEM[J]. Acta Energiae Solaris Sinica. 2023, 44(5): 88-96 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1564

中图分类号： TM721.1

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