Robust Control Parameter Design for Virtual Synchronous Generator Under Variable Operation Conditions of Grid

被引：0

作者：

Wu M. ^{[1
]}

Lü Z. ^{[1
]}

Qin L. ^{[2
]}

Song Z. ^{[1
]}

Sun L. ^{[1
]}

Zhao T. ^{[1
]}

Xu J. ^{[2
]}

Gao J. ^{[2
]}

机构：

[1] China Electric Power Research Institute, Haidian District, Beijing

[2] College of Electrical Engineering, Nantong University, Nantong, 226019, Jiangsu Province

来源：

Dianwang Jishu/Power System Technology | 2019年 / 43卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Parameter design; Robust; Small-signal model; Variable grid conditions; Virtual synchronous generator;

D O I：

10.13335/j.1000-3673.pst.2018.2850

中图分类号：

学科分类号：

摘要：

Virtual synchronous generator (VSG) can actively participate in grid power regulation and increase equivalent inertia and damping to improve stability of power system. This paper focuses on design of robust control parameters for VSG under variable grid operating conditions. Firstly, the cut-off frequency constraint, under which LC-type VSG can be simplified to L-type, is analyzed. Based on this, a small-signal model of VSG is established, and the phase angle margin constraint for power loop decoupling is obtained. Then, the relation curves of control parameters (J, Dp) and (K, Dq) satisfying the cut-off frequency and the phase angle margin constraint throughout entire grid operation range are plotted. The overlap region of all this curves is the required robust stable region. Finally, correctness of theoretical analysis is verified with a 10kVA VSG simulation model in Matlab/Simulink. The research shows that VSG stability will deteriorate with increase of grid voltage. The control parameters selected in the designed robust region can ensure VSG stable operation. © 2019, Power System Technology Press. All right reserved.

引用

页码：3743 / 3751

页数：8

共 20 条

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