Study on Fault Ride-through Method of VSG Based on Power Angle and Current Flexible Regulation

被引：0

作者：

Li Q. ^{[1
]}

Ge P. ^{[1
]}

Xiao F. ^{[1
]}

Lan Z. ^{[2
]}

Ge Q. ^{[1
]}

机构：

[1] National Electric Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha, 410082, Hunan Province

[2] College of Electrical and Information Engineering Hunan University of Technology, Zhuzhou, 412007, Hunan Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Fault current limitation; Fault ride-through; Transient angle stability; Virtual synchronous generator;

D O I：

10.13334/j.0258-8013.pcsee.191684

中图分类号：

学科分类号：

摘要：

Virtual synchronous generator (VSG) cannot suppress the fault current in the case of symmetric short-circuit fault of the grid, and the stability of VSG is threatened,which will affect its ability to support the grid. Therefore, it is an important mean to improve the stability of the grid by ensuring the VSG to continue to provide voltage and frequency support for the microgrid in the case of grid failure. On this basis, taking full advantage of the flexible and controllable VSG, a fault-ride through method of VSG based on power angle and current flexible regulation was proposed. This strategy can ensure the transient power angle stability of VSG by suppressing the phase deviation between the VSG output voltage and the grid voltage during the fault. Besides, it can prevent the VSG from overcurrent effectively. Through analysis, the principle and control flow of transient stability and fault current suppression are given. Finally, simulation and experiment results show that the proposed VSG transient control strategy is correct and effective. © 2020 Chin. Soc. for Elec. Eng.

引用

页码：2071 / 2080

页数：9

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