输入电流低纹波的超高增益非隔离DC-DC变换器  

Non-isolated Ultra-high Voltage Gain DC-DC Converter With Low Input Current Ripple

作　　者：丁新平 曹益畅 赵振伟 周明珠 韦正怡 蔡骏[1] DING Xinping;CAO Yichang;ZHAO Zhenwei;ZHOU Mingzhu;WEI Zhengyi;CAI Jun(Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu Province,China;Qingdao University of Technology,Qingdao 266520,Shandong Province,China)

机构地区：[1]南京信息工程大学,江苏省南京市210044 [2]青岛理工大学,山东省青岛市266520

出　　处：《中国电机工程学报》2023年第6期2359-2370,共12页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52077105);山东省自然科学基金项目(ZR2020ME200)。

摘　　要：高电压增益DC-DC变换器广泛应用于清洁能源发电系统。输入电流低纹波有利于延长可再生能源模块和变换器的使用寿命。提出一种集成三绕组耦合电感和倍压电路的超高增益DC-DC变换器。变换器拥有输入电流连续、电压增益高、开关管电压应力小、无源钳位及输入输出共地等优点,特别适合作为并网电路前级DC-DC变换器,应用于清洁能源发电系统。独特的三绕组耦合电感和倍压电路构成的升压结构,使变换器在较小的耦合电感总匝比和合适的占空比下实现了很高的电压增益。和相同电压增益的基于两绕组耦合电感的变换器相比较,增加的降压绕组(n_(2)<1)不但没有增加耦合电感的感量和磁芯体积,反而减少了耦合电感的总电感和磁芯大小。因此在实现相同的升压比时,所提变换器比现有相近结构的变换器耦合电感总感量小,磁芯体积小,相应的耦合电感损耗小,功率密度高。开关管和钳位二极管的低电压应力为选择低导通损耗的开关器件和超快恢复二极管提供了便利,减小了开关管导通损耗和二极管反向恢复损耗。论文详细分析变换器的工作模态、稳态性能、各元器件的电压和电流应力,提出变换器的元器件设计指导准则,最后用实验室样机进行验证,实验结果和理论分析非常契合。High voltage gain DC-DC converters are widely used in clean energy generation system.A non-isolated ultra-high voltage gain DC-DC converter with low input current ripple is presented,which integrates three-winding coupled-inductor and multiplier voltage cells.The converter has advantages of continuous input current,high step-up gain,low voltage stress on switch,passive clamping circuit,and common ground.It is very suitable for clean energy power generation system.The coupled-inductor of the converter has two turns ratio,one is step-up(n1>1)and the other is step-down(n_(2)<1).Hence,by felicitously designing the values of n1 and n2,the proposed converter can achieve ultrahigh voltage gain at appreciate total turns ratio and duty cycle,which improves the efficiency of the converter.The passive clamping circuit reduces the voltage spike of the switch and recycles the leakage inductance energy.Low voltage-rating switch decreases power loss of the converter.Moreover,the proposed converter features low input current ripple,which is friendly to the clean energy(fuel cell or photovoltaic)applications.The operation principles and characteristics of the converter are analyzed.Finally,experimental results verify the theoretical analysis.

关 键 词：高电压增益 耦合电感 倍压单元 输入电流连续 DC-DC变换器 

分 类 号：TM46[电气工程—电器]