摘要
The use of renewable energy is essential for addressing global climate change,and offshore wind power plays a critical role in achieving this goal.As nearshore resources become saturated,the focus of offshore wind power development is shifting to deep-sea areas.Deep-sea wind power transmission schemes must prioritize lightweight designs and low costs to enhance overall economic and technical feasibility.Currently,four lightweight offshore wind power transmission schemes have been identified:low-frequency alternating current(LFAC)transmission,high-voltage direct current(HVDC)transmission utilizing uncontrolled diode rectifier units(DRU-HVDC),DRU-MMC parallel-connection hybrid rectifier transmission(PCDRU-MMC),and DRU-MMC series-connection hybrid rectifier transmission(SCDRU-MMC).Four schemesare examined,advantages and disadvantages in various scenariosare outlined,technical performanceare analyzed.A comprehensive economic assessment of each scheme is conducted for deep-sea environments far from load centers.The results indicate that LFAC transmission effectively reduces transmission losses,whereas DRU-HVDC has limitations in terms of voltage support and black-start capability.In contrast,hybrid rectification solutions such as PCDRU-MMC and SCDRU-MMC combine the economic benefits of DRU-HVDC with the flexibility of modular multilevel converters(MMCs),thereby enhancing system reliability and efficiency.
基金
Supported by the Science and Technology Project of China Southern Power Grid Corporation(030000KC23040118).
