Modeling and comparison analysis of outgoing power cables for offshore wind farms

The design and selection on outgoing power cables of offshore wind farm affect the security and stability operation of power system. In this paper, based on a practical offshore wind farm in Jiangsu Province, modeling and comparative analysis of two typical outgoing power cables, those are three-core and single-core submarine cables at 35 kV, for offshore wind farms are implemented. Considering the costs of one-time investment and lifetime operating, an economical mathematical model for outgoing power cables is established. Additionally, combining structural and environmental parameters of outgoing power cables, transient heat transfer model is proposed and real-time simulated with finite element software Comsol. According to the economy and heat transfer reliability models, comprehensive comparative analyses were done between the two typical cables. Finally, the advantages and disadvantages of the two typical cables and application conditions are summarized, which provide an important reference for future application of outgoing power cables for offshore wind farms.