一种基于高自由度电压增益单元的高升压DC-DC变换器  

A High Step-up DC-DC Converter Based on High Degrees of Freedom Voltage Multiplier Cell

作　　者：邾玢鑫[1] 刘崧 黄悦华[1] 曾庆典 ZHU Binxin;LIU Song;HUANG Yuehua;ZENG Qingdian(College of Electrical Engineering ＆ New Energy, Three Gorges University, Yichang 443002, Hubei Province, Chin)

机构地区：[1]三峡大学电气与新能源学院

出　　处：《中国电机工程学报》2018年第9期2707-2716,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51607104,51707103);湖北省教育厅优秀中青年科技创新团队项目(T201504)~~

摘　　要：该文提出一种基于高自由度电压增益单元（high degrees of freedom voltage multiplier cell,HD-VMC）的大容量高增益DC/DC变换器,具有输入输出增益高、开关器件电压电流应力低且可调、输入相数可自由扩展且自动均流的优点。上述特性使得所提变换器较适用于大容量高增益直流变换场合,如海上风电直流输电系统中。文中首先对变换器的拓扑构建思路进行阐述,然后以4相输入12个HD-VMCs的变换器为例分析该变换器的工作原理及性能特点,最后通过2.5MW的仿真模型和800W的实验样机验证理论分析的正确性。This paper presents a high step-up DC/DC converter based on high degrees of freedom voltage multiplier cell（HD-VMC） which has the features as： high voltage conversion ratio, lower and adjustable voltage and current stress, scalable and automatic input-current sharing in each phase. All above the characteristics make the proposed converter very suitable for high power and high step-up voltage conversion applications, such as offshore wind power high voltage direct current（HVDC） transmission system. In this paper, the topology deduction of the proposed converter has been discussed. Operation principle and performance characteristics of the converter are analyzed with 4 input phases and 12 HD-VMCs, Then, a 2.5 MW simulation model and 800 W experimental prototype verified the correctness of the theoretical analysis.

关 键 词：输入相数可调 高自由度电压增益单元 自动均流 高增益DC/DC变换 

分 类 号：TM46[电气工程—电器]