A novel single-stage non-isolated buck-boost photovoltaic inverter

被引：0
|
作者：
Wang L. [1 ]
Liu L. [1 ,2 ]
Li Z. [1 ]
机构：
[1] Key Laboratory of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University, Qinhuangdao
[2] State Grid Shijiazhuang Power Supply Company, Shijiazhuang
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 03期
关键词：
Buck-Boost inverters; Non-electrolytic capacitors; Nonlinear PWM; Single stage non-isolated; Wide range input voltage;
D O I：
10.19912/j.0254-0096.tynxb.2018-1077
中图分类号：
TN6 [电子元件、组件];
学科分类号：
080903 ;
摘要：
A new single-stage non-isolated Buck-Boost inverter is proposed. To make the linear relationship between the input voltage and the modulation wave, a novel nonlinear PWM strategy is adopted. This inverter has a balanced buck-boost capability, which is suitable for applications where the input voltage of the photovoltaic system fluctuates widely. In addition, this inverter uses fewer switching devices. Only one inductor with a small inductance is needed as the energy storage component and does not need electrolytic capacitors, which has the advantages of small volume, low cost, high efficiency, short circuit and simple circuit protection. First, analyze the working principle of the inverter, determine its modulation strategy, then establish its mathematical model, design a closed-loop regulator, and finally perform simulation and experimental verification. Through the analysis of simulation and experimental results, it is shown that the inverter has buck-boost capability and is suitable for occasions where the input voltage varies widely. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
收藏
页码：338 / 346
页数：8
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