METHOD FOR THE DISTRIBUTED CONTROL OF THE FREQUENCY IN AN OFFSHORE WIND FARM

摘要

The invention relates to a method for the distributed control of the frequency in a wind farm, said farm comprising wind turbines (11) connected to a line (24) connected to a bus bar (3) that is, in turn, connected by a transformer (6) to a diode AC/DC rectifier station connected to a DC link (8) which releases the energy generated by the wind farm (1) to the electrical grid (10), said energy being released by means of an inverter station (9). Each wind turbine (11) includes an internal converter (110) comprising an inverter (113) and a capacitor (C) connected between the output of the inverter (113) and an output step-up transformer (23) of the wind turbine (11). The method comprises equalising the frequencies generated by each wind turbine (11) by controlling the quadrature component of the current (i_kq) at the output of the inverter (113), which is carried out by acting on the internal voltages of the inverter (113).