MODULATION AND CONTROL STRATEGY OF NOVEL SINGLE-PHASE GRID-CONNECTED CURRENT SOURCE INVERTER

被引：0

作者：

Xu, Qiwei ^{[1
]}

Fu, Yilun ^{[1
]}

Miao, Yiru ^{[1
]}

Zhao, Yizhou ^{[1
]}

Luo, Lingyan ^{[1
]}

机构：

[1] State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2025年 / 46卷 / 03期

关键词：

active damping; current source inverter; DC-link current; photovoltaic power generation; pulse modulation; resonance;

D O I：

10.19912/j.0254-0096.tynxb.2023-1922

中图分类号：

学科分类号：

摘要：

Compare to voltage source inverter，without adding dead time，current source inverter has the ability to boost the voltage，and no additional passive filter is required at the AC-side. However，the DC-link current is not a constant current source，and is generated by the voltage source and the DC-link inductor，so it is necessary to consider the DC-link current regulation in the control system. Therefore，in this paper，single-phase five-switch current source grid-connected inverter with DC-chopper is studied. Firstly，the reference calculation and the control method of the DC-link current is presented. Then，aiming at the problem that the switching signal of the current source inverter cannot be directly generated by the traditional modulation，the logic expression of the switching signal is deduced. Next，aiming at the peak resonance problem of the LC filter on the grid side，the active damping based on capacitor voltage is introduced，under the consideration of the digital delay，the mathematical model of the grid side structure is established and the optimization design method of proportional-resonance controller parameters is studied by combining the amplitude-frequency characteristic curve. Finally，the simulation model and experimental platform are constructed to carry out simulation and experimental verification. The results show that high-quality power with a good dynamic performance can be provided by the inverter，which proves that the theoretical analysis and the proposed method are correct and feasible. © 2025 Science Press. All rights reserved.

引用

页码：412 / 420

页数：8

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