Small-Signal Modeling and Controller Parameters Tuning of Grid-Forming VSCs With Adaptive Virtual Impedance-Based Current Limitation

被引：28

作者：

Wu, Heng ^{[1
]}

Wang, Xiongfei ^{[1
]}

机构：

[1] Aalborg Univ, AAU Energy, DK-9220 Aalborg, Denmark

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2022年 / 37卷 / 06期

关键词：

Circuit faults; Tuning; Power system stability; Voltage control; Adaptation models; Power system dynamics; Cutoff frequency; Current limitation; grid-forming (GFM); small-signal model; virtual impedance (VI); voltage-source converters (VSCs); VOLTAGE; CONVERTERS;

D O I：

10.1109/TPEL.2021.3135693

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The adaptive virtual impedance (VI) control emerges as an attractive solution to limit the current of grid-forming voltage-source converters (GFM-VSCs) during grid faults. Yet, the adaptive VI-based current limitation relies on the detection of the current magnitude, which introduces nonlinear dynamics that challenges the controller parameters tuning of GFM-VSCs. This article develops the small-signal model of GFM-VSCs with adaptive VI-based current limitation, from which, the dynamic impact of the adaptive VI is explicitly revealed. Considering such impact, a holistic controller parameters tuning method for GFM-VSC is proposed to guarantee the small-signal stability of the system. Simulation and experimental tests are performed to verify the effectiveness of the theoretical analysis and the proposed parameters tuning method.

引用

页码：7185 / 7199

页数：15