摘要
以应用于串联系统的光伏(PV)直流变换器为研究对象,分析了串联系统中PV直流变换器的运行特性,在串联系统中直流变换器输出功率不均衡情况下,输出功率大的直流变换器将发生输出过电压问题。此处提出了一种改进型Boost全桥隔离变换(IBFBIC)功率模块拓扑结构,功率模块不仅可以工作在Boost模式,而且可以工作在Buck模式;基于功率模块输入并联输出串联(IPOS)组成PV直流变换器,提出基于直流变换器内部功率模块投切的电压调整策略,扩展变换器输出电压运行范围,以避免变换器输出过电压。搭建了串联系统实验平台,验证了提出的功率模块拓扑及直流变换器控制策略的可行性和有效性。
Taking the photovoltaic(PV)DC/DC converter applied in series system as the research object,the operation characteristics of the PV DC/DC converter in series system is analyzed.When the output power of the DC/DC con-verter in series system is unbalanced,the DC/DC converter with high output power will have the problem of output overvoltage.An improved Boost full bridge isolated converter(IBFBIC)power module topology is proposed.The power module can work not only in Boost mode,but also in Buck mode.Based on the input parallel and output series(IPOS)of the power module,the PV DC/DC converter is composed,and the voltage adjustment strategy based on switching of the internal power module of the DC/DC converter is proposed to expand the output voltage operation range to avoid overvoltage of converter.A series system experimental platform is built to verify the feasibility and effectiveness of the proposed power module topology and the DC/DC converter control strategy.
作者
黄欣科
王环
王一波
许洪华
HUANG Xin-ke;WANG Huan;WANG Yi-bo;XU Hong-hua(Institute of Electronic Engineering Chinese Academy of Science,Beijing 100190,China)
出处
《电力电子技术》
CSCD
北大核心
2022年第1期83-87,共5页
Power Electronics
基金
中国科学院战略性先导科技专项(A类)子课题(XDA21050301)。
关键词
变换器
光伏
串联系统
converter
photovoltaic
series system
