Study on small-signal stability of grid-connected grid-forming inverter system based on hybrid-synchronous control

被引：0

作者：

Qiu X. ^{[1
]}

Lin H. ^{[1
]}

Zhou Y. ^{[1
]}

Yan X. ^{[1
]}

Zang T. ^{[1
]}

Qiu Y. ^{[1
]}

Zhou B. ^{[1
]}

机构：

[1] College of Electrical Engineering, Sichuan University, Chengdu

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 09期

基金：

中国国家自然科学基金;

关键词：

control parameter; grid-connected inverter; grid-forming inverter; hybrid-synchronous control; small-signal stability; state-space model;

D O I：

10.16081/j.epae.202308019

中图分类号：

学科分类号：

摘要：

Due to the complex interaction exists among direct voltage controller，phase locked loop（PLL）and power synchronous loop（PSL） in hybrid-synchronous control（HSC） of grid-connected grid-forming （GFM） inverter system，and grid impedance，the influence laws of synchronization loop’s parameters on small-signal stability of the system under different grid strengths are still unclear. To solve this problem，a HSC-based state-space model for the GFM inverter system is established，the influence laws of control parameters of hybrid-synchronous loop on the small-signal stability and instability modes of grid-connected systems under different grid strengths are analyzed based on root locus method. Based on this，a selecting method about the control parameter of the additional PLL branch is proposed to ensure the stable operation of the HSC-based grid-connected inverter system irrespective of grid strength. The simulative analysis based on MATLAB／Simulink verifies the correctness of the theoretical analysis. © 2023 Electric Power Automation Equipment Press. All rights reserved.

引用

页码：172 / 178and185

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