期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：252
期号：3
页码：1-10
DOI：10.1088/1755-1315/252/3/032192
出版社：IOP Publishing
摘要：In the grid-connected inverter system, due to the existence of digital control delay, the inverter presents the characteristic of negative damping. The traditional damping method is usually the form of capacitive current feedback, but the stability margin of the system is very low. Passive damping can improve the stability margin of the system, but it increases the loss of the system and reduces the high-frequency attenuation characteristics of the filter. Therefore, this paper considers the use of active + passive damping, while ensuring the system phase margin, reducing the loss as far as possible, improving the filter's high-frequency filtering characteristics. Finally, the simulation model is built in Matlab/Simulink, and the correctness of the theoretical analysis is verified by simulation.
