Modeling method of sequence admittance for three-phase voltage source converter under unbalanced grid condition

被引：5
|
作者：
Cen, Yang [1 ]
Huang, Meng [1 ]
Zha, Xiaoming [1 ]
机构：
[1] Wuhan Univ, Sch Elect Engn, Wuhan, Hubei, Peoples R China
来源：
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY | 2018年 / 6卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Unbalanced grid voltage; Three-phase voltage source converter; Harmonic linearization; Positive and negative sequence admittance; Stability;
D O I：
10.1007/s40565-018-0399-z
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 admittance is a strong tool for stability analysis and assessment of the three-phase voltage source converters (VSCs) especially in grid-connected mode. However, the sequence admittance is hard to calculate when the VSC is operating under unbalanced grid voltage conditions. In this paper, a simple and direct modeling method is proposed for a three-phase VSC taking the unbalanced grid voltage as a new variable for the system. Then coupling in the three-phase system can be calculated by applying the harmonic linearization method. The calculated admittance of three-phase VSCs is verified by detailed circuit simulations.
引用
收藏
页码：595 / 606
页数：12
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