Influence of Delay on System Stability and Delay Optimization of Grid-Connected Inverters With LCL Filter

被引：229

作者：

Zou, Changyue ^{[1
]}

Liu, Bangyin ^{[1
]}

Duan, Shanxu ^{[1
]}

Li, Rui ^{[1
]}

机构：

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

来源：

IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS | 2014年 / 10卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Alias; digital control; inverter; sampling delay; total harmonic distortion (THD);

D O I：

10.1109/TII.2014.2324492

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Delay is inevitable in digital-controlled system and the delay will change system phase-frequency characteristic, thus affecting system stability. The system stability of inductor-capacitor-inductor (LCL)-type grid-connected inverter with single-loop control based on inverter-side current and single-loop control based on grid-side current is analyzed both in continuous and discrete domains. The influence of delay time on systemstability is systematically studied. A delay time control method that is capable of adjusting delay time is further proposed to improve system stability. The proposed delay time control method is applied in the experiment, making anunstable systemto be stable, and verifies the analysis result and proposed method.

引用

页码：1775 / 1784

页数：10