A Small-signal Stability Criterion and Parametric Sensitivity Analysis for Multiple Grid-connected-converter System

被引：0

作者：

Zhu Y. ^{[1
]}

Zhao J. ^{[1
]}

Mao L. ^{[1
]}

Qu K. ^{[1
]}

机构：

[1] College of Electrical Engineering, Shanghai University of Electric Power, Yangpu District, Shanghai

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2021年 / 41卷 / 18期

基金：

中国国家自然科学基金;

关键词：

Multiple grid-connected-converter system; Parameter sensitivity; Small-signal stability; Stability criterion;

D O I：

10.13334/j.0258-8013.pcsee.201881

中图分类号：

学科分类号：

摘要：

Due to the negative resistance characteristic of power electronic device, the small-signal stability in a multiple grid-connected-converter system (MGCCS) is facing many challenges. The impedance analysis method and state space analysis method in the analysis of a MGCCS has some limitations. In this paper, a stability analysis method for MGCCS based on a sufficient stability criterion was proposed. Firstly, MGCCS was modeled as a medium and high dimensional negative feedback system with a stable open-loop function. Secondly, a sufficient stability criterion with low complexity was developed through estimating the eigenvalue of the open-loop function. And a corresponding parameter sensitivity analysis was proposed by using the developed criterion. Finally, a 7-infeed converter system with stability problem was used to verify the effectiveness of the proposed method. Theoretical analysis and nonlinear simulation showed that the criterion in this paper could accurately judge the stability of the system with low complexity. In addition, the parameter sensitivity analysis could provide a guidance for the parameter optimization of the system. © 2021 Chin. Soc. for Elec. Eng.

引用

页码：6235 / 6244

页数：9

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