Optimal Transmission Frequency of Low Frequency AC System for Offshore Wind Farm Integration

Compared with HVAC or HVDC, low frequency AC (LFAC) technology demonstrates specific advantages on the offshore wind farm integration. Firstly, this paper discusses the selection principle of the upper limit of operating frequency of low-frequency system. Then the current along the submarine cable is calculated by MATLAB. According to the simulation results, the maximum transmission frequency of the cable line is determined as 20Hz. On this basis, taking into account the transmission capacity and difficulty of equipment manufacturing, 20Hz is finally selected as the optimal transmission frequency of offshore wind farm based on LFAC, which provides guidance for future designs of equipment and demonstration engineering.