Summary
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
Read more Read less(MMC) topology, DC circuit breakers (DCCBs), and high-speed switches (HSS) within the DC grid, providing a new solution for the development of multi-gigawatt offshore wind power bases.
For the "hybrid half/full-bridge MMC + HSS" configuration scheme, a surplus power balancing scheme that does not rely on a Centralized Dynamic Braking System (DBS) is proposed and applied to a practical project for the first time. Combined with an engineering example, digital simulations are used to verify the feasibility of the offshore-onshore integrated grid connection and transmission system and its DC fault clearance and ride-through scheme. This supports the commencement of project construction and provides a novel solution for the engineering practice of efficient transmission of ultra-large scale offshore wind power.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | B4_11594_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | China, People's Republic of |
| Study committees | |
| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
ZOU Changyue - Electric Power Research Institute, CSG; HOU Ting - Electric Power Research Institute, CSG; LU Yuxin - Electric Power Research Institute, CSG; HUANG Yihong - Electric Power Research Institute, CSG
Keywords
