Jing Ge, Hongyang Yu, Guoliang Zhao, Zhanfeng Deng, Chaoliang Wang
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Research on Low-Frequency Offshore Wind Power Transmission and Frequency Conversion Technology
This paper introduces three offshore wind power transmission modes, which are power frequency AC, flexible DC and low-frequency AC. Secondly, the key technologies including parameter design and control strategy of large-capacity AC/AC frequency converter used in low-frequency transmission system are studied. Then, it is verified by system modelling and simulation that one 400 MW offshore wind power transmitted by low-frequency has technical feasibility, and the correctness of parameter design and control strategy is also tested. Finally, it is summarized that within a certain transmission distance, low-frequency transmission mode has better technical and economic performance, and it could be one beneficial alternate mothed of offshore wind power grid-connected to the power frequency mode and flexible DC transmission mode.
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