摘要
为解决超级电容单体的串联均压问题,提高均压电路工作效率,提出一种新型零电压开关(ZVS)均压拓扑。在传统由开关器件和电感组成的buck-boost均压电路中增加两个小容量谐振电容,通过电容和电感间谐振实现开关器件的ZVS。在分析了本拓扑结构的开关状态,建立不同开关阶段的等效电路模型后,得出了拓扑的ZVS工作条件和能量转移原理,并由此确定了系统关键参数的设计原则。最后通过仿真和实验验证该拓扑结构的正确性与可行性,相较其他均压法电路工作效率更高,能量损失更小,且模块化扩展性好,可实现超级电容单体或模块间的快速高效均压。
In order to realize the equalization of super capacitors connected in series in the storage system and improve efficiency of equalization circuits, we proposed a novel equalizing topology based on the zero-voltage switching（ZVS） for the super capacitor. Additional two small resonant capacitors which do not exist in traditional buck-boost equalization circuits and consist of a switch and an inductor are needed to achieve ZVS through resonance with the inductor. Then we discussed the switching states and equivalent circuit, introduced details of the operation principles, and analyzed the work process. At the same time, the design principle of key parameters of equalizer circuit was given. Moreover, the validity and feasibility of proposed ZVS topology are verified by the simulation and experimental results, showing that the method of equalizing is of higher efficiency compared with other methods. The system loss is small and it is easy to modify the topology for larger number of capacitors, so that it can provide fast and efficient equalization between super capacitor monomers and modules.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2015年第7期2202-2208,共7页
High Voltage Engineering
基金
国家自然科学基金(51207010)~~
关键词
超级电容
储能系统
均压
零电压开关
功率波动
软开关
super-capacitor
energy storage system
voltage equalization
zero-voltage switching
power vibration
soft-switching
