摘要
耦合电感型高增益Boost变换器在光伏、燃料电池等新能源并网系统中得到广泛重视,但鲜有文献阐述其拓扑构建思路及方法。为此,以基本耦合电感型Boost变换器为出发点,分析了其优点和不足;然后围绕如何抑制开关管电压尖峰、如何降低输出二极管电压应力、如何进一步提高电压增益,系统分析并推导了有源钳位、带整流单元、多绕组以及带倍压单元等四类改进的耦合电感型Boost变换器,明确了它们之间的内在联系及各自的性能特点;最后根据分析结果,选择一种带倍压单元的层叠型高增益Boost变换器进行实验研究,搭建了250W的实验样机,实测最大效率为97%。
High step-up Boost converters with coupled inductors have attracted much attention in the fuel cell or photovoltaic（PV） grid-connected generation systems; however, there are few references that deal with the ideas and methods to derive the topologies of them. For that reason, using the basic boost converter with coupled inductors as the starting point, the merits and demerits of it were analyzed firstly; then, concerning how to remove the voltage spike of the switch, how to reduce the voltage stress of the output diode and how to improve the step-up ratio of the converter further, the topologies of the active clamped converter, the converter with rectifier cells, the multi-windings converter and the converter with a voltage doubler rectifier were derived and analyzed, and the characteristics and inner connections of them were clarified. Finally, according to the analyzing results above, a stacked high step-up boost converter with a voltage doubler rectifier was chosen to conduct the experimental research and a 250 W prototype had been built, and the maximum measured efficiency was about 97%.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2017年第24期7266-7275,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51577019)~~
关键词
耦合电感
高增益Boost变换器
有源钳位
整流单元
倍压单元
coupled inductor
high step-up boost converter
active clamp
rectifier cell
voltage doubler rectifier
