In the context of large-scale and medium-and-long distance offshore wind power development,a compre-hensive economic comparison has been made between fractional frequency transmission system(FFTS)and other transmission systems.An economic evaluation model based on the levelized cost of electricity(LCOE)for the FFTS system.This model takes into account the lifecycle,initial resource investment,operational losses,routine mainte-nance,decommissioning costs,and tax liabilities.By using an offshore wind farm as a case study,the paper ana-lyzes the economic intervals of the FFTS and economic variability under various scenarios.The findings reveal that,for a 500 MW offshore wind farm,the economic interval extends from 80 to 250 kilometers;moreover,this range ex-hibits a notable degree of stability and demonstrates superior economic viability in contrast to traditional transmis-sion systems across multiple scenarios.
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