Non-isolated high step-up DC/DC converter based on a high degrees of freedom voltage gain cell

作者：Zhu, Binxin^*; Liu, Song; Huang, Yuehua; Tan, Chao

来源：IET Power Electronics, 2017, 10(15): 2023-2033.

DOI：10.1049/iet-pel.2017.0166

• DC-DC power convertors
• offshore installations
• wind power plants
• DC
• DC converter
• high degrees of freedom voltage gain cell
• voltage stress
• conversion ratio
• current stress
• semiconductor devices
• input phase numbers
• offshore wind power high-voltage DC transmission system
• power 400 W

This study presents a non-isolated high step-up DC/DC converter based on a high degree of freedom voltage gain cell (HDF-VGC). Both voltage stress of components and conversion ratio of the proposed converter could be adjusted by the number of the HDF-VGC, the current stress of the semiconductor devices can also be adjusted by the input phase numbers of the converter. Moreover, the input current of each phase are automatically balanced. These characteristics make the proposed converter very suitable for high-power and high-voltage applications, such as offshore wind power high-voltage DC transmission system. In this study, the topology construction of the proposed converter has been discussed. The operation principle and performance characteristics of the converter are analysed with four input phases and five HDF-VGCs, then the converter is simulated and a 400 W experimental prototype has been built to verify the correctness of the theoretical analysis.

• 出版日期2017-12-15
• 单位三峡大学