CONTROL METHODS OF THE VSC-HVDC CONNECTED OFFSHORE WIND POWER PLANTS FOR FULFILLING; LVRT AND FREQUENCY REGULATION SUPPORT

Grid integration of offshore wind farms could seriously impact the operation and stability of their interconnected power system. To assist in maintaining the power system stability when large disturbances occur in the grid, modern offshore wind farms consisting of variable-speed wind turbines are required to provide ancillary services such as voltage and frequency control. The focus is given on the control methods of the VSC-HVDC connected offshore wind power plants for ful？lling the grid code requirements; LVRT and frequency regulation support