Topology Research of DC/DC Converters for Offshore Wind Farm DC Collection Systems

被引：0
|
作者：
Wang X. [1 ]
Tang G. [2 ]
He Z. [2 ]
Wei X. [2 ]
Ma C. [3 ]
Zhang S. [2 ]
Xiao X. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System With Renewable Energy Source, North China Electric Power University, Changping District, Beijing
[2] Beijing Key Laboratory of High Power Electronics, Global Energy Interconnection Research Institute, Changping District, Beijing
[3] China Electric Power Research Institute, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2017年 / 37卷 / 03期
关键词：
DC collection system; DC/DC converter; Electrical topology; Offshore wind farm; Technological requirement;
D O I：
10.13334/j.0258-8013.pcsee.161220
中图分类号：
学科分类号：
摘要：
The DC collection systems of offshore wind farms avoid many problems that the AC collection systems encounter, such as multistage boost, connection of a large number of inductors, and bad stability performance. Besides, the DC collection systems need less equipment investment and are quite simple to design. As one of the key components of DC collection systems, DC/DC converters with high voltage ratio are of great importance. This paper firstly investigated the grid configuration, system control and voltage determination of the medium voltage (MV) collection lines of parallel DC collection systems. Secondly, an analysis of the technological requirement for medium and high voltage DC/DC converters in offshore wind farms was conducted with regard to power, voltage ratio and isolation. Furthermore, on the basis of the existent topology research, the topologies of the multiple phase-shift three level DC/DC converter and the modular multilevel DC/DC (M2DC) converter applicable for wind farms were proposed. Finally, the theoretical feasibility of the proposed topologies was verified by simulations, which shows that the control strategy of the proposed topologies can meet the requirements of the whole DC collection systems. © 2017 Chin. Soc. for Elec. Eng.
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页码：837 / 847
页数：10
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