METHOD OF CONTROLLING PITCH SYSTEMS OF A WIND TURBINE

摘要

The invention describes a method of controlling the pitch systems (2A, 2B, 2C) of a plurality of pitch systems (2A, 2B, 2C) of a wind turbine (1), which method comprises the steps of generating a main pitch control signal (600) for the pitch systems (2A, 2B, 2C) on the basis of a performance parameter of the wind turbine (1); generating a distinct auxiliary pitch control signal (4A, 4B, 4C) for each individual pitch system (2A, 2B, 2C) of the plurality of pitch systems (2A, 2B, 2C); adding an auxiliary pitch control signal (4A, 4B, 4C) to the main pitch control signal (600) to give a combined pitch control signal ( 6A, 6B, 6C) for a pitch system (2A, 2B, 2C); and controlling that pitch system (2A, 2B, 2C) in response to that combined pitch control signal ( 6A, 6B, 6C). The invention also describes a pitch control system (6) for controlling the pitch systems (2A, 2B, 2C) of a plurality of pitch systems (2A, 2B, 2C) of a wind turbine (1), and a wind turbine (1) comprising a pitch control system (6) according to the invention.