在太阳能开发利用过程中,升压变换器能实现较高升压比,但存在开关器件电压应力过高问题。为了降低开关器件电压应力,提出一种低应力高增益升压变换器基本结构,在提高电压增益的同时降低了电压应力。为了更好地适用于多种升压场合,将二次型升压网络、开关电感网络、开关电感电容网络和准Z源网络4种升压单元对其储能电感进行替换,得到一类低应力高增益升压变换器,分析了利用准Z源网络替代的高增益升压变换器工作特性,并与同类型变换器进行对比分析。最后,利用Matlab/Simulink仿真软件和实验样机验证了所提变换器理论分析的正确性和可行性。
Abstract
In the process of solar energy development and utilization, Boost converter can achieve high voltage Boost ratio, but there is a problem of high voltage stress of switching devices. In order to reduce the switching device voltage stress a low stress high gain Boost converter basic structure is proposed, which reduces the voltage stress while increasing the voltage gain. In order to better apply to a variety of boosting situations, four types of boosting units, namely secondary Boost network, switched inductor network, switched inductor-capacitor network and quasi-Z source network, are replaced with their energy storage inductors to obtain a class of low-stress high-gain Boost converter. The operating characteristics of the high-gain Boost converter replaced by using quasi-Z source network are analyzed and compared with the same type of converter. Finally, the correctness and feasibility of the theoretical analysis of the proposed converter are verified by using Matlab/Simulink simulation software and experimental prototypes.
关键词
光伏发电 /
准Z源 /
升压单元 /
高增益 /
低应力 /
升压变换器
Key words
PV power generation /
quasi-Z source /
Boost unit /
high gain /
low stress /
Boost converter
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基金
国家自然科学基金（119075023）; 特种重载机器人安徽省重点实验室开放基金（TZJQR008-2023）
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