Eliminating Centralized DC Dynamic Braking Systems: A Novel Distributed Dissipation Approach for Large-Scale Offshore Wind HVDC Transmission

As countries worldwide accelerate their transition to renewable energy, large-scale offshore wind has emerged as a critical pillar of global decarbonization strategies. However, as offshore wind continues to increase in capacity and move farther away from shore, conventional point-to-point HVDC links and AC corridor-dependent schemes are reaching their economic and spatial limits. This evaluation is driving the need for a new generation of multi-terminal DC architectures capable of integrating multiple offshore wind clusters efficiently ^[1-4]. The Sanshandao project in China’s Greater Bay Area represents one such solution. By integrating multiple offshore wind clusters into a common ±500 kV and 6 GW onshore DC hub, it demonstrates a scalable architecture for future ultra-large offshore wind integration. This article highlights the key technical innovations and lessons from that project that are relevant to the development of next-generation offshore HVDC systems.