计及线路阻抗匹配的混合储能系统均流控制  

Current Sharing Control of Hybrid Energy Storage System Considering Line Impedance Matching

作　　者：徐炅渊 赵晋斌 屈克庆 李相俊[2] XU Jiong-yuan;ZHAO Jin-bin;QU Ke-qing;LI Xiang-jun(Shanghai University of Electric Power,Shanghai 200090,China;不详)

机构地区：[1]上海电力大学,电气工程学院,上海200090 [2]中国电力科学研究院,北京100192

出　　处：《电力电子技术》2021年第8期129-131,140,共4页Power Electronics

基　　金：国家自然科学基金(51777120)。

摘　　要：直流微网中,储能单元的加入能有效应对分布式电源及负荷的波动,保证母线电压稳定和功率平衡。蓄电池和超级电容组成的混合储能系统,优化了储能单元的稳态和暂态输出特性。在实际情况下,母线阻抗不匹配会直接影响混合储能系统的放电特性,缩短储能系统寿命,影响系统的稳定性。在此提出了一种主动检测线路阻抗的改进自适应下垂控制,可以实时检测线路阻抗并对下垂控制进行修正,能有效改善其动态均流精度、系统稳定性和冗余性。最后通过仿真和RT-LabOP5700验证了所提控制策略的正确性和有效性。In the direct current microgrid,the addition of energy storage units can effectively cope with the fluctuation of distributed power and load,and ensure the stability of bus voltage and power balance.The hybrid energy storage system composed of batteries and super capacitors optimizes the steady-state and transient output characteristics of the energy storage unit.In actual situations,the mismatch of bus impedance will directly affect the discharge characteristics of the hybrid energy storage system,shorten the life of the energy storage system,and affect the stability of the system.An improved adaptive droop control that actively detects the line impedance is proposed,which can detect the line impedance in real time and correct the droop control,which can effectively improve the accuracy of dynamic current sharing,system stability and redundancy.Finally,simulation and RT-LabOP5700 verified the correctness and effectiveness of the proposed control strategy.

关 键 词：直流微网 混合储能系统 线路阻抗 动态均流 

分 类 号：V242.3[航空宇航科学与技术—飞行器设计]