一种新型双极直流变换器及海上风电场直流故障隔离

2021 3rd International Conference on Smart Power & Internet Energy Systems (SPIES) Pub Date : 2021-09-25 DOI:10.1109/SPIES52282.2021.9633970

Lidan Zhou, Zhongren Gu, G. Yao, Canbing Li, Dongdong Li

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引用次数: 1

摘要

直流直接输电技术将成为大型海上风电系统的有效解决方案。本文提出了一种可用于海上风电系统直接集输的非隔离MMC直流变换器。该拓扑结构可以以低成本与高电压差的高压直流电网连接。双极设计满足了风电系统的传输需求。多相交错拓扑可以抑制输入电流和输出电压的纹波，其容错操作控制方法满足深海低维护电平的设计需要。在此基础上，研究了多工况下的移相调制规律和单向潮流控制方案。基于MATLAB/Simulink，对稳态故障、动态故障和短路故障进行了拓扑仿真分析。最后建立了一个原型系统，验证了理论分析的正确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A Novel Bi-polar HVDC Converter and DC Fault Isolation for Offshore Wind Power Farm

Direct DC transmission technology will become an effective solution for large offshore wind power system. This paper presents a Non-isolated MMC DC converter, which can be used for direct gathering and transmission of offshore wind power system. The topology structure can be connected to the HVDC grid with high voltage difference at low cost. The bipolar design meets the transmission needs of wind power system. The multiphase interleaving topology can inhibit the ripple of input current and output voltage, and its fault-tolerant operation control method meets the deep sea low maintenance level design needs. Based on the new topology, the phase shift modulation law and one-way power flow control scheme under multi working conditions are studied. Based on MATLAB/Simulink, the simulation analysis of the topology is carried out for steady state, dynamic and short circuit faults. Finally, a prototype system is built to verify the correctness of the theoretical analysis.

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2021 3rd International Conference on Smart Power & Internet Energy Systems (SPIES)

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