Multi-terminal HVDC Transmission Technology for Offshore Wind Power Adopting Hybrid Cable-OHL and Its Applications

The global development of offshore wind power is accelerating. The current mature 1GW-scale offshore wind power development schemes have many drawbacks, such as high costs and significant occupation of transmission corridors, hindering large-scale centralized offshore wind power development on the order of 10 GW. Targeting the scenario of ultra-large scale offshore wind power in Yangjiang being directly transmitted to inland load centers, this paper studies an offshore-onshore integrated grid connection and transmission scheme based on an onshore DC hub. It proposes configuration schemes for the modular multilevel converter