具有谐振软开关的高增益耦合电感组合Boost-Zeta变换器  

High Step-Up Integrated Boost-Zeta Converter with Coupled Inductor and Resonant Soft-Switching

作　　者：孙瑄瑨 荣德生[1] 王宁[2] Sun Xuanjin;Rong Desheng;Wang Ning(Faculty of Electrical and Control Engineering Liaoning Technical University,Huludao 125105 China;School of Mechanical Electronic and Information Engineering China University of Mining and Technology,Beijing 100083)

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 [2]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《电工技术学报》2024年第6期1830-1842,共13页Transactions of China Electrotechnical Society

基　　金：辽宁省重点攻关项目(LJ2020ZD004);辽宁省“兴辽英才计划”项目(XLYC1906014)资助。

摘　　要：该文提出一种适用于光伏发电系统的具有谐振软开关的高增益耦合电感组合Boost-Zeta变换器。该变换器是由Boost变换器与Zeta变换器组合并引入有源钳位支路和谐振耦合倍压单元而得到。所提变换器利用拓扑组合和耦合倍压技术实现了非常高的电压增益。利用有源钳位支路,实现了所有开关管零电压开通。同时,利用二次绕组与谐振电容谐振实现了所有二极管的零电流关断,有效地解决了二极管反向恢复问题。分析变换器的工作原理,给出变换器的各项性能参数和软开关实现条件。所提变换器还可通过叠加倍压单元进一步提升电压增益。最后,搭建一台200 W实验样机,对理论分析进行了验证。The output voltage generated by the photovoltaic array and fuel cell is very low,which needs to be boosted to a high DC-bus voltage for inverting or grid connection.In order to obtain a DC-DC converter with high step-up capability,various boosting techniques,such as switched inductor,switched capacitor,and cascade techniques,have been proposed.However,their related converters have a large number of components and work in a hard-switching model,resulting in increased cost and reduced efficiency.Therefore,a high step-up coupled inductor integrated Boost-Zeta converter with coupled inductor and resonant soft-switching for photovoltaic/fuel cell systems has been proposed.The proposed converter achieves higher voltage gain with fewer components.Meanwhile,the resonant soft switching technique reduces the switching losses.Firstly,the integrated Boost-Zeta converter topology is obtained by integrating the Boost converter and the Zeta converter using the topology combination technique.The voltage gain of the Boost-Zeta converter is the sum of the Boost converter and the Zeta converter.At the same time,continuous input and output currents are obtianed.Then,based on this topology,a novel converter is proposed by replacing the diodes with switches.The proposed converter has a high voltage gain using a resonantly coupled inductor voltage multiplier cell.The zero voltage switching(ZVS)turn-on of all switches is achieved by active clamp branches,which reduces voltage stress and switching losses.Meanwhile,the zero current switching(ZVS)turn-off of all diodes is achieved by resonating the secondary winding with the resonant capacitor,effectively solving the diode reverse recovery problem.Thirdly,the operation principle of the converter is analyzed,and the performance parameters of the converter and the conditions of soft switching are given.Finally,the general topology of the proposed converter is given and compared with other converters proposed in the literature.An experimental prototype with 24 V to 32 V input and 200 V-200 W

关 键 词：高增益 耦合电感 Boost-Zeta变换器 有源钳位 谐振 零电压软开关 零电流软开关 

分 类 号：TM46[电气工程—电器]