基于拓扑组合的高增益交错并联DC-DC变换器  

High-gain Interleaved Parallel DC-DC Converter Based on Topological Combination

作　　者：荣德生[1] 张豪 孙瑄瑨 RONG Desheng;ZHANG Hao;SUN Xuanjin(School of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,China)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105

出　　处：《电力系统及其自动化学报》2025年第3期100-109,共10页Proceedings of the CSU-EPSA

基　　金：辽宁省教育厅基础项目(LJKMZ20220683)。

摘　　要：为提高应用于光伏发电系统中的直流变换器电压增益,提出一种基于拓扑组合的高增益交错并联DC-DC变换器。首先,将Boost与Sepic变换器进行拓扑组合,形成并联输入的Boost-Sepic变换器,同时在控制策略上采用交错运行的方式,引入耦合电感替换原电感,耦合电感副边与电容、二极管组成耦合倍压结构,以二极管与电容组成无源钳位支路吸收漏感能量。然后,对变换器的工作原理及连续稳态模式进行分析,得出变换器稳态性能参数,结果表明其具有较高的电压增益,以及显著降低开关管电压应力和输入电流纹波的优势。最后,通过搭建一台200 W的样机进行实验,验证所提变换器的性能优势。To improve the voltage gain of DC-DC converters applied in photovoltaic power generation systems,a highgain interleaved parallel DC-DC converter based on topological combination is proposed.First,the Boost and Sepic converters are combined to form a parallel input Boost-Sepic converter.Meanwhile,an interleaved operation control strategy is adopted,and a coupled inductor is introduced to replace the original inductor.The secondary side of the coupled inductor forms a coupled boost structure with capacitors and diodes,while a passive clamp branch composed of diodes and capacitors is used to absorb the leakage energy.Then,the working principle and continuous steady-state mode of the converter are analyzed,and the steady-state performance parameters of the converter are obtained.The results show that it has a high voltage gain and the advantages of significantly reducing the voltage stress of the switching tube and the input current ripple.Finally,a 200 W prototype is built for experiments to verify the performance advantages of the proposed converter.

关 键 词：拓扑组合 高增益 交错并联 低电压应力 低电流纹波 

分 类 号：TM46[电气工程—电器]