Virtual Inductance for Stable Operation of Grid-Interactive Voltage Source Inverters

被引：65
作者：
Adib, Aswad [1 ]
Mirafzal, Behrooz [1 ]
机构：
[1] Kansas State Univ, Elect & Comp Engn Dept, Manhattan, KS 66506 USA
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2019年 / 66卷 / 08期
基金：
美国国家科学基金会;
关键词：
Control of grid-tied inverters; LCL filter; virtual inductance; voltage source inverter (VSI); weak grid; CONNECTED INVERTER; IMPEDANCE; STABILITY; IMPROVE; FILTER; STABILIZATION; ADAPTABILITY; FEEDFORWARD; CONVERTERS; SYSTEM;
D O I：
10.1109/TIE.2018.2874594
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, a feedforward virtual inductance control strategy is developed for the stability of voltage source inverters (VSIs) in weak grids. A weak grid is characterized by a low short-circuit ratio and a low inertia constant, in which VSIs become susceptible to voltage distortions and instability. The proposed feedforward virtual inductance term is integrated into the current control loops of grid-tied VSIs. In this paper, the effectiveness of the virtual inductance control strategy in weak grids is first proved through closed-loop transfer function analysis and then the system's root locus analysis to determine the stability region of the system versus the grid impedance. The developed virtual inductance controller is also verified through laboratory experiments for different weak grid scenarios.
引用
收藏
页码：6002 / 6011
页数：10
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