Design of Additional Active Damping for Three-phase LCL Grid Connected Inverter Based on Im-pedance Analysis Method

被引：0

作者：

Wang Y. ^{[1
]}

Ye W. ^{[1
]}

Song R. ^{[2
]}

Bi J. ^{[2
]}

Chen L. ^{[1
]}

Shen J. ^{[1
]}

机构：

[1] College of Electrical Engineering, Sichuan University, Chengdu

[2] China Electric Power Research Institute, Beijing

来源：

Ye, Wei (764541641@qq.com) | 1600年 / Science Press卷 / 47期

关键词：

Active damping; Grid-connected inverter; Impedance modeling; Impedance reshaping; Resonance suppression; Small signal stability;

D O I：

10.13336/j.1003-6520.hve.20201500

中图分类号：

学科分类号：

摘要：

In the three-phase LCL grid connected inverter system, due to the interaction between equipment and system, harmonic oscillation may occur, which seriously affects the normal operation of the system. In order to solve this problem, the har-monic linearization method is adopted to modify the impedance model considering the influence of grid side voltage of coupling compensation term, and the modified sequence impedance model of three-phase LCL grid connected inverter is established. At the same time, stability analysis is conducted from the perspective of resonance principle and logarithmic frequency stability to reveal the generation mechanism of high-frequency resonance in photovoltaic grid connected system. The impedance characteristic curve is taken into consideration, the parameters of the damping link are selected, and the impedance is reconstructed in the frequency band which is easy to oscillate. Finally, based on the Matlab/Simulink simulation platform, the correctness and effectiveness of the method are verified. The results show that the additional active damping link can effectively suppress harmonic oscillation and has good dynamic characteristics. © 2021, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：2645 / 2654

页数：9

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