Eight Typical Schemes of Offshore Wind Power Transmission and Their Key Technical Problems

Focusing on the three technical features related to the offshore wind turbine and the offshore transmission channel, eight schemes of offshore wind power transmission and their corresponding key technologies are discussed. The first technical feature describes the grid-forming capability of the offshore wind turbine; two types of wind turbines are discussed, namely, the grid-following wind turbine and the grid-forming wind turbine. The second technical feature describes the frequency characteristics of the output voltage and current of the offshore wind turbine, including DC, low-frequency AC, power-frequency AC and medium-frequency AC. The third technical feature describes the power transmission modes adopted by the offshore high-voltage main transmission channel, which are HVDC, high-voltage low-frequency AC and high-voltage power-frequency AC. Finally, the technical characteristics and maturity of the eight offshore wind power transmission schemes are reviewed, and a technical development direction is recommended.

Automated summary

This article discusses the three technical features related to offshore wind turbines and offshore transmission channels, and introduces eight schemes for offshore wind power transmission and their corresponding key technologies. The first technical feature focuses on the grid-forming capability of offshore wind turbines, discussing two types: grid-following and grid-forming wind turbines. The second feature describes the frequency characteristics of offshore wind turbine output voltage and current, including DC, low-frequency AC, power-frequency AC, and medium-frequency AC. The third feature explains the power transmission modes adopted by offshore high-voltage main transmission channels, including HVDC, high-voltage low-frequency AC, and high-voltage power-frequency AC. Finally, the technical characteristics and maturity of the eight offshore wind power transmission schemes are reviewed, and a recommended direction for technical development is provided.