Adaptive Control Strategy of VSG Parameters in Photovoltaic Microgrid

被引：0
作者：
Yin G. [1 ]
Dong H. [1 ]
Dai Y. [1 ]
Wang H. [1 ]
Wang S. [1 ]
机构：
[1] School of Electrical Engineering, Yanshan University, Qinhuangdao, 066004, Hebei Province
来源：
Dianwang Jishu/Power System Technology | 2020年 / 44卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Adaptive control strategy; Frequency oscillation; Virtual damping; Virtual inertia; VSG;
D O I：
10.13335/j.1000-3673.pst.2018.3031
中图分类号：
学科分类号：
摘要：
When solar energy is integrated into photovoltaic microgrid in large scale, the inertia of the system is reduced. This may cause severe oscillations in the system after being disturbed. In order to solve this problem, this paper proposes a new virtual synchronous generator (VSG) control strategy, able to effectively enhance the system inertia. By constructing an adaptive relationship between virtual inertia and damping and frequency offset, the new strategy allows the system to configure the virtual inertia and damping coefficient according to the system characteristics in different stages of its transient process. Compared with traditional control strategy, the control strategy can reduce the impact of the system under the same load disturbance, thereby reducing the overshoot and oscillation time of the system during the oscillation process, and effectively improving the dynamic stability of the photovoltaic system. Furthermore, this paper analyzes the selection range of the key parameters of the system in detail, and uses root locus method to determine the optimal selection value of each parameter. Finally, with Matlab/Simulink simulation tool, effectiveness and superiority of the new VSG control strategy are verified by comparing with traditional control strategies. © 2020, Power System Technology Press. All right reserved.
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页码：192 / 199
页数：7
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