Novel offshore wind power generation system control method based on disturbance observer

Abstract

The invention discloses a novel offshore wind power generation system control method based on a disturbance observer, and relates to the technical field of permanent magnet synchronous wind power generator control. The method comprises the following steps: constructing a mathematical model of a wind turbine, and designing a maximum power tracking module; constructing a mathematical model of the permanent magnet synchronous generator; designing a disturbance torque observer, and introducing a low-pass filter to improve the observation precision; designing a sliding mode controller based on a double-exponential reaching law; and combining the output values of the sliding mode controller and the disturbance torque observer as a q-axis current instruction to control the rotating speed of the permanent magnet synchronous generator. According to the method, the maximum power point of the wind turbine is captured, the air disturbance torque is estimated and compensated, accurate and rapid tracking of the rotating speed of the rotor matched with the maximum power point of the wind turbine is achieved through the novel double-exponential sliding mode controller, and the wind energy conversion efficiency is improved. And the anti-interference capability of the wind power generation system is enhanced in a complex marine environment.

Images