Application Status and Prospect of VSC-HVDC Technology for Large-Scale Offshore Wind Farms

doi:10.11930/j.issn.1004-9649.202002108

Abstract

Abstract: Due to the strong wind resource stability and high annual utilization hours of offshore wind power, with the increasing capacities of offshore wind turbines, the expansion of investment scale and the reduction of construction costs, VSC-HVDC based large-scale offshore wind power transmission technology has become a popular topic for offshore wind power development and research. Based on typical offshore wind power VSC-HVDC transmission projects, application status of key electrical equipment including converter valves, interface transformers, energy-dissipating devices, HVDC breaker, submarine DC cables have been analyzed and summarized in this paper. In addition, control system structure and hardware configuration as well as control algorithm are introduced. Considering the salt mist corrosion environment where offshore platforms are located, both the anticorrosion design and seawater cooling system design of the interface transformers, converter valves are introduced. The current research status of large-scale offshore wind power grid integration solutions have also been analyzed and summarized. The prospect of offshore converter stations and offshore wind farms has been forecasted.

Key words: offshore wind farms, VSC-HVDC, anticorrosion design, seawater cooling, grid integration, application status, prospect

LIU Weidong, LI Qinan, WANG Xuan, ZHANG Fan, LI Lanfang, YAN Hui. Application Status and Prospect of VSC-HVDC Technology for Large-Scale Offshore Wind Farms[J]. Electric Power, 2020, 53(7): 55-71.

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https://www.electricpower.com.cn/EN/Y2020/V53/I7/55

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