The study of different unidirectional input parallel output series connected DC‐DC converters for wind farm based multi‐connected DC system,International Transactions on Electrical Energy Systems

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The study of different unidirectional input parallel output series connected DC‐DC converters for wind farm based multi‐connected DC system
International Transactions on Electrical Energy Systems ( IF 1.9 ) Pub Date : 2021-03-10 , DOI: 10.1002/2050-7038.12855
Xiaoyun Rong ₁ , Jonathan K. H. Shek ₁ , D. Ewen Macpherson ₁

Affiliation

There is increasing interest in interconnecting individual wind turbines in offshore wind farms using DC networks rather than AC networks. However, the output voltage from each turbine/generator is normally low (less than 6 kV), so DC‐DC converters are required to step‐up the voltage to an intermediate level to interconnect the turbine outputs. Another DC‐DC converter is required to step‐up this intermediate voltage to a high level for transmission to the shore. The DC‐DC converter applied to step‐up the voltage from an intermediate voltage to a high level not only needs to operate with high voltage at both input and output, but also be capable of transferring hundreds of megawatts power. In these circumstances, Input Series Input Parallel Output Series (ISIPOS) DC‐DC converter structure is a good option for the application. In this paper, three different kinds of Input Parallel Output Series (IPOS) DC‐DC converters are presented and compared, and it is the first time this comparison has been made. Both the simulation and downscaled hardware test results are provided and analysed, while the best option in different situations is suggested.

中文翻译：

基于风电场的多连接直流系统的不同单向输入并联输出串联DC-DC转换器的研究

人们越来越关注使用DC网络而非AC网络互连海上风力发电场中的各个风力涡轮机。但是，每个涡轮机/发电机的输出电压通常较低（小于6 kV），因此需要DC-DC转换器将电压升至中间水平以互连涡轮机输出。需要另一个DC-DC转换器将该中间电压升压到高电平才能传输到岸上。用于将电压从中间电压升压到高电平的DC-DC转换器不仅需要在输入和输出端都以高电压运行，而且还能够传输数百兆瓦的功率。在这种情况下，输入串联输入并联输出串联（ISIPOS）DC-DC转换器结构是该应用的不错选择。在本文中，提出并比较了三种不同类型的输入并行输出系列（IPOS）DC-DC转换器，这是第一次进行这种比较。提供并分析了仿真和缩减后的硬件测试结果，同时建议了在不同情况下的最佳选择。

更新日期：2021-05-03

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