Active Damping Control of Cascaded DC Converter in DC Microgrids Based on Optimized Parallel Virtual Resistance

被引：12
作者：
Liao, Jianquan [1 ]
Guo, Chunsheng [1 ]
Huang, Yuansheng [2 ]
Qiu, Guanqun [3 ]
Zhou, Niancheng [2 ]
Wang, Qianggang [2 ]
机构：
[1] Sichuan Univ, Sch Elect Engn, Chengdu 610065, Peoples R China
[2] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Sec, Chongqing 400044, Peoples R China
[3] Khalifa Univ, Abu Dhabi, U Arab Emirates
来源：
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN INDUSTRIAL ELECTRONICS | 2023年 / 4卷 / 02期
基金：
国家重点研发计划;
关键词：
Impedance; Circuit stability; Microgrids; Stability criteria; Damping; Voltage control; Transfer functions; Active damping control; cascaded dc system; dc microgrid; parallel virtual resistance (PVR); stability control; STABILIZATION; STABILITY; SYSTEMS;
D O I：
10.1109/JESTIE.2022.3220159
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In dc microgrid, the cascaded dc system has been extensively employed. However, the negative impedance characteristics of the converter may induce system instability. This article proposes an optimized parallel virtual resistance (PVR) based active damping control to improve the stability of the cascade dc system in the dc microgrid. The advantage of this method is that it not only meets the closed-loop dynamic performance of the source converter (SC), but also meets the stability requirements of matching the input impedance of the load converter. The stability range of PVR under full load and its influence on the output impedance of SC in cascade system are determined. Additionally, a large-signal model is constructed by using state-space averaging method to investigate the open-loop stability in the cascaded dc system. The suggested control stability requirements are investigated by using the Lyapunov indirect approach, and a matching PVR is then adopted to ensure system stability. Finally, the performance of the control strategy is verified by establishing a MATLAB simulation and experiment platform.
引用
收藏
页码：560 / 570
页数：11
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