• The expansion of offshore wind power is increasing the importance of offshore grids in transmitting power to land. However, Korea lacks clear offshore grid governance, complicating efficient design and operation.

• The main models of offshore grid governance include transmission system operator (TSO)-led, generator-led, and third-party (OFTO)-led models, which differ in terms of who builds the grid, who pays for it, and how efficient it is.

• The UK emphasizes competition through an OFTO-led model, while Germany and Denmark have adopted a TSO-led model to realize economies of scale.

• South Korea needs to improve the cost burden structure of offshore grids and proactively establish a clear governance system to support the introduction of meshed offshore grids and their efficient deployment.