基于电荷泵的燃料电池有源网络升压变换器  

An Active Network DC-DC Boost Converter with a Charge Pump Employed in Fuel Cells

作　　者：唐钧涛 戚志东[1] 裴进 单梁[1] Tang Juntao;Qi Zhidong;Pei Jin;Shan Liang(School of Automation Nanjing University of Science and Technology,Nanjing 210094 China)

机构地区：[1]南京理工大学自动化学院,南京210094

出　　处：《电工技术学报》2022年第4期905-917,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(61374153);江苏省自然科学基金(BK20191286)资助项目。

摘　　要：高增益DC-DC变换器是燃料电池发电技术的关键环节,有利于改善燃料电池小电压、大电流特性。但是由于传统Boost变换器存在电压增益有限、电感电流纹波大、功率器件应力高的缺陷,无法满足燃料电池发电系统并网运行的需求。该文提出一种基于电荷泵的燃料电池有源网络升压变换器,将有源网络变换器中输入侧的电感用电荷泵结构代替。该变换器结合电荷泵电压倍增能力强和有源网络结构输入电流纹波小的优势,具有电压增益高、电感电流平均值小、开关器件电压/电流应力低、鲁棒性强的特点。最后搭建一套燃料电池前级功率变换实验样机,验证了变换器的高效率与有效性,当输入电压为20V、输出电流为1.25A时,系统整体效率可以达到94.1%。The DC-DC converter with high step-up voltage gain plays an important role in fuel cell power generation technology,which has become an effective measure to improve fuel cells’low-voltage and high-current characteristics.However,the traditional Boost converter cannot satisfy the requirements of grid-connected operation of fuel cell power generation systems due to its disadvantages of limited voltage gain,large inductor current ripple,and high-power device stress.In this paper,by replacing the inductors on the input side of the active network converter(small input current ripple)with a charge pump structure(strong voltage multiplication ability),an active network DC/DC Boost converter with a charge pump is put forward,which has high step-up voltage gain,small inductor current,low voltage/current stress on power devices,and strong robustness.Then,an experimental prototype of fuel cell front stage power conversion is established to verify the effectiveness and high efficiency of the proposed converter.When the input voltage is 20 V and the output current is 1.25 A,the overall efficiency of the system can reach about 94.1%.

关 键 词：燃料电池发电技术 高增益DC-DC变换器 有源网络 电荷泵 

分 类 号：TM46[电气工程—电器]