Stability analysis of DC microgrid based on virtual inertia control and its improved method

被引：0
|
作者：
Zhu X. [1 ]
Han D. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Baoding
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 12期
关键词：
DC microgrid; Small-signal model; Stability analysis; Virtual impedance; Virtual inertia control;
D O I：
10.16081/j.epae.201911011
中图分类号：
学科分类号：
摘要：
Virtual inertial control can enhance the inertia of the DC microgrid and prevent the sudden change of DC bus voltage, while its impact on system stability is still unclear. The DC microgrid based on virtual inertial control is taken as the research object, the small-signal models of grid-connected converter and constant power load are derived, and the source-side output impedances and load input impedance are obtained. According to the frequency analysis method and impedance matching criterion, the influences of virtual inertia coefficient and constant power load on system stability are analyzed. From the perspective of impedance matching, series of virtual impedance is proposed to reduce the source-side output impedance, so as to improve the stability margin of the system. © 2019, Electric Power Automation Equipment Press. All right reserved.
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页码：121 / 127
页数：6
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