Design and simulation of a new HVDC converter to connect offshore wind turbines to the power grid

The use of high voltage direct current (HVDC) technology to connect wind turbines seems to be very convenient, as it provides a cost-effective solution for long-distance energy transfer as well as for offshore wind farms. In this paper, a new method for connecting wind turbine chains with the help of DC link connection is presented. In this method, electronic power converters are used to create HVDC converters distributed between turbines. In the proposed method, in addition to reducing the number of equipment, converters and electronic components of power, it reduces costs and increases efficiency and better voltage stability in wind fluctuations. The simulation results show that the change in wind speed and related fluctuations due to changes in air climate have no effect on the output voltage of the system connected to the transmission network. The results show that the designed controller works well and keeps the voltage constant at 100 kV by controlling the current. It should be noted that all simulations were performed in PSCAD / EMTDC software environment.