Research on energy transmission methods of large-scale offshore wind power clusters

It is particularly important to study the economic feasibility of energy transmission methods using hydrogen as a carrier and electric hydrogen hybrid transmission methods in response to the high construction, installation, and maintenance costs of electric energy transmission systems. Firstly, the advantages and disadvantages of electricity and hydrogen transmission modes are analyzed, the investment cost and benefit model of the single electricity and hydrogen transmission system is established, and the operation strategy of the single electricity and hydrogen transmission system is proposed; Secondly, for the multi-energy carrier delivery mode of electric-hydrogen hybrid, it is proposed to formulate the operation strategy of the hybrid delivery system by decoupling the system investment cost and operation income; Next, based on the cost model and operation strategy of each transmission system, plan and configure the transmission system to maximize its net profit. Finally, the actual data of a certain offshore wind power plant was used for calculation and analysis, and the economic performance of five transmission systems was compared and analyzed. The calculation results showed that the hybrid transmission system of flexible direct current transmission and LH2 ship transmission of hydrogen energy had the best economic efficiency.