Seamless switching control strategy for low voltage ride-through based on virtual synchronous generator

被引：0
|
作者：
Li H. [1 ]
Gao H. [2 ]
Hao Y. [1 ]
Ren Y. [1 ]
Li L. [1 ]
机构：
[1] College of Electrical Engineering, Inner Mongolia University of Technology, Hohhot
[2] Shanghai EHV Management Office, State Grid Operation Branch, Shanghai
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 03期
关键词：
LVRT; Mode seamless switching; Pre-synchronization; Virtual synchronous generator;
D O I：
10.19912/j.0254-0096.tynxb.2018-1173
中图分类号：
学科分类号：
摘要：
The distributed generation based on virtual synchronous generator (VSG) control strategy can connect to grid friendly. Based on the establishment of the mathematical model of the VSG control strategy and combined with traditional low voltage ride-through (LVRT) control method, according to the problem of the distributed generation based on VSG control strategy without LVRT capacity, this paper proposed a mode seamless switching control strategy based on voltage amplitude and phase synchronization. The VSG output phase is corrected by pre-synchronization unit in real time, and the problem of voltage amplitude and phase inconsistency before and after the LVRT/VSG mode switching was avoid Effectively. The simulation results show that the proposed control strategy can make the converter suppress the transient impulse current and improve the power quality of the grid during the grid fault, and furthermore guarantee the distributed generation based on VSG control strategy connect to power grid safely, the correctness and effectiveness of proposed method is verified. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：114 / 120
页数：6
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