| 摘要: |
| 随着分布式发电的出现，可再生能源与电池组的结合以及负荷对其的严重依赖，对高效电力电子变换器的需求日益增加。提出一种降低电压应力的高增益DC-DC变换器的新颖结构。该结构是传统Boost变换器两级叠加的结果。当占空比较低时，因为增益与占空比的二次关系，所提供的电压增益很高。此外，该变换器的输入电流连续，所提供的负载接地。详细介绍了所提变换器的拓扑结构和工作模式，分析了电感的等效串联电阻对电压增益的影响。并对已有的高增益变换器和所提新型的高电压增益变换器进行了比较分析。最后通过仿真研究验证了所提拓扑结构的正确性。 |
| 关键词: DC-DC变换器 分布式发电 高电压增益 低电压应力 |
| DOI：DOI: 10.19783/j.cnki.pspc.201382 |
| 投稿时间：2020-11-09修订日期：2021-01-12 |
| 基金项目:湖南省教育厅优秀青年项目资助(20B328)；国家自然科学基金项目资助(61702182) |
|
| A novel high voltage gain DC-DC converter |
| YUE Zhou |
| (College of Energy, Mechanical and Electrical Engineering, Hunan University of Humanities,
Science and Technology, Loudi 417000, China) |
| Abstract: |
| With the advent of distributed generation, the need for an efficient power electronic converter is increasing, since the incorporation of renewables with a battery unit and loads relies heavily on such a converter. This paper suggests an original structure of a high-gain DC to DC converter with reduction in voltage stress. The configuration is the result of stacking two stages of the classical boost converter. The voltage gain offered is high for even lower values of duty cycle as the relation with gain is quadratic. Also, the converter current at the input is continuous, and the load configuration offered is grounded. Analysis and operational modes of the proposed converters and effect of the effective series resistance of inductors on voltage gain are presented in detail. A comparative analysis of suggested and new high-gain converters is presented. The suggested configuration is confirmed using detailed simulation studies.
This work is supported by the Outstanding Youth Project of Hunan Education Department (No. 20B328) and the National Natural Science Foundation of China (No. 61702182). |
| Key words: DC-DC converter distributed generation high voltage gain low voltage stress |
