SLIDING MODE CONTROL STRATEGY FOR QUASI-Z-SOURCE INVERTER IN PV GRID-CONNECTED SYSTEM

被引：0
|
作者：
Tian L. [1 ]
Yang X. [1 ]
机构：
[1] School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 03期
关键词：
chattering; grid-connected system; photovoltaic; quasi-Z source inverter; robustness; sliding mode control;
D O I：
10.19912/j.0254-0096.tynxb.2021-1242
中图分类号：
学科分类号：
摘要：
Aiming at the problems such as light intensity change，system oscillation，anti-interference ability and anti-harmonic ability of the photovoltaic grid-connected system，an integral compensation sliding mode control strategy containing state variables is designed for capacitor voltage outer loop to ensure the relative stability of the capacitor voltage without over-harmonic and distortion. A sliding mode controller based improved switching function for the inner loop of grid-connected current to reduce chattering and improve grid-connected effect. Matlab/Simulink platform simulation results verify that the proposed method outperforms the PI and proportional resonance（PR）control strategy，and the proposed method can enhance the global robustness of the grid-connected system，effectively improve the dynamic response speed of the system and the quality of the grid-connected power，and can suppress the harmonic signal of the grid voltage. © 2023 Science Press. All rights reserved.
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页码：443 / 449
页数：6
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