Harmonic Stability Assessment based on Global Admittance for Multi-Paralleled Grid-Connected VSIs using Modified Nyquist Criterion

被引：0

作者：

Cao, Wu ^{[1
]}

Fan, Dongchen ^{[1
]}

Liu, Kangli ^{[1
]}

Zhao, Jianfeng ^{[1
]}

Ruan, Liheng ^{[2
]}

Wu, Xiaojun ^{[2
]}

机构：

[1] Southeast Univ, Dept Elect Engn, Nanjing 210096, Jiangsu, Peoples R China

[2] Jiangsu Haihang Elect Technol Co Ltd, Zhenjiang 212200, Jiangsu, Peoples R China

来源：

2018 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-NIIGATA 2018 -ECCE ASIA) | 2018年

基金：

中国国家自然科学基金;

关键词：

Harmonic Stability; Global Admittance; Voltage Source Inverters; Modified Nyquist Criterion;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The mutual interactions in the multi-paralleled grid-connected VSIs coupled through the grid impedance tend to result in the whole system oscillating-formed resonance, namely the harmonic stability issue. To address them, the traditional impedance-based stability criterion (IBSC) evaluates the stability by the impedance ratio, also known as minor loop gain (MLG). In this paper, the novel global admittance is proposed to assess the harmonic stability using the modified Nyquist criterion. Compared to the IBSC, the computation efforts would be reduced significantly and the resonance damping factor as the stability margin index can be obtained to assess the stability degree directly. The simulation results verify the effectiveness of the theoretical analysis.

引用

页码：3015 / 3019

页数：5

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