Modeling of VSC Connected to Weak Grid for Stability Analysis of DC-Link Voltage Control

被引：290

作者：

Huang, Yunhui ^{[1
]}

Yuan, Xiaoming ^{[1
]}

Hu, Jiabing ^{[1
]}

Zhou, Pian ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China

来源：

IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS | 2015年 / 3卷 / 04期

基金：

中国国家自然科学基金;

关键词：

DC-link voltage control; eigenvalue analysis; phase-locked loop (PLL); small-signal model; voltage source converter (VSC); WIND GENERATOR;

D O I：

10.1109/JESTPE.2015.2423494

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：

In this paper, a small-signal model of voltage source converter (VSC) is developed to investigate the stability of dc-link voltage control. This model contributes to representing the dc-link voltage dynamics characteristics of VSC integrated to weak grid. Effects of grid strength, operating point, and control loops' interactions on the performance of VSC are taken into consideration. Based on the proposed small-signal model, eigenvalue analysis is employed to study the stability of dc-link voltage control with varying operating conditions. Analysis results show that control loops' interactions introduce a partial positive feedback to the dc-link voltage control in weak grid. Furthermore, the effect of control loops' interactions on dc-link voltage control stability reaches largest when the bandwidth of the phase-locked loop is close to that of the dc-link voltage control. Time-domain simulations and experiments were conducted to validate the analysis.

引用

页码：1193 / 1204

页数：12

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