Optimal Configuration of Grid-following/Grid-forming Switchable Units in New Energy Stations Based on Operating Short-circuit Ratio

被引：0

作者：

Zhou Y. ^{[1
]}

Yao W. ^{[1
]}

Zong Q. ^{[1
]}

Zhou H. ^{[1
]}

Zhao H. ^{[1
]}

Wen J. ^{[1
]}

机构：

[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology), Hubei Province, Wuhan

来源：

Dianwang Jishu/Power System Technology | 2024年 / 48卷 / 03期

关键词：

eigenvalue analysis; GFL/GFM switching; new energy station; proportional configuration; sub-synchronous oscillation;

D O I：

10.13335/j.1000-3673.pst.2023.1448

中图分类号：

学科分类号：

摘要：

The existing new energy stations based on the traditional grid-following control can hardly adapt to the weak grid. Retrofitting some units with a grid-following/ grid-forming switching function can enhance the station's operation capability with a weak grid and avoid the problem of sub-synchronous oscillation. Firstly, this paper establishes a network switching model to achieve an undisturbed switching of grid-following and grid-forming. Secondly, this paper analyzes the stability characteristics of the new energy power unit under the grid-following and grid-forming control, and then the operating short circuit ratio is chosen as the switching index of the grid-following/grid-forming control. Thirdly, a new energy station switching scheme based on the operating short circuit ratio is proposed, and the optimal configuration method of the switchable unit is proposed. Finally, the rationality and superiority of the proposed configuration method are verified by simulation examples. © 2024 Power System Technology Press. All rights reserved.

引用

页码：1091 / 1102

页数：11