Active Damping Control of Energy Storage Converter in DC Microgrid Based on Oscillatory State Feedback

被引：0
|
作者：
Fu Y. [1 ]
Li H. [1 ]
Zhang X. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power Systemwith Renewable Energy Sources, North China Electric Power University, Baoding
来源：
Gaodianya Jishu/High Voltage Engineering | 2021年 / 47卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Damping oscillation; DC microgrid; Energy storage converter; Pole placement; State feedback;
D O I：
10.13336/j.1003-6520.hve.20191903
中图分类号：
学科分类号：
摘要：
In a DC microgrid, during disturbances, the power tracking control of the converters on photovoltaic module and wind turbine side and the constant power control of the converters on the load side both present the negative impedance characteristics, increasing the risk of system oscillation instability. Firstly, a small disturbance linearized state equation of islanding DC microgrid with constant power load is deduced, and the influence mechanism of oscillation voltage and current of energy storage converter as adjustable control parameters on the system oscillation characteristics of DC power grid is theoretically analyzed. Secondly, by taking DC voltage and current as state feedback variables, a duty cycle feedback link for droop control of the energy storage converter is designed, and the control strategy of damping DC microgrid oscillation is proposed. In addition, the optimal design of parameters is realized by pole placement. Finally, through root locus and simulation analysis, it is verified that the proposed control strategy has significant damping capacity for DC microgrid oscillation, thus improving the dynamic stability of the system. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：927 / 936
页数：9
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