Study of stability after low voltage ride-through caused by phase-locked loop of grid-side converter

被引：13

作者：

Zhang, Ziqian ^{[1
]}

Schuerhuber, Robert ^{[1
]}

Fickert, Lothar ^{[1
]}

Friedl, Katrin ^{[1
]}

机构：

[1] Inffeldgasse 18, A-8010 Graz, Austria

来源：

INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS | 2021年 / 129卷

关键词：

Grid-side converter; Phase-locked loop; Low voltage ride-through; Stability; PLL; INSTABILITY; SYSTEMS;

D O I：

10.1016/j.ijepes.2021.106765

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 a power system with a high percentage of converter coupled generation, dynamic characteristics of the converter affects the stability of the whole power system. The interaction of the various control loops of the gridside converter, e.g., the phase-locked loop and the DC link voltage control loop, dominates the various dynamic characteristics of the grid-side converter, including its low voltage ride-through ability. In this paper, the phaselocked loop is modeled and analyzed and a stability criterion for the converter, depending on the grid impedance, is obtained. According to this criterion, a common low voltage ride-through test device based on the shunt impedance voltage sag generator is analyzed. The results show that, and explain why, the test device cannot reproduce the characteristics of the practical grid, which is also verified by experiments using a controllerHardware-in-the-loop system.

引用

页数：8

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