Method of load shedding of floating wind turbine generator system based on semi-active structure control of magneto rheological damper

Abstract

The invention discloses a method of load shedding of a floating wind turbine generator system based on semi-active structure control of a magneto rheological damper. The method includes the following steps: (1) analyzing the structure of the magneto rheological damper, obtaining a force-displacement relationship of the magneto rheological damper; (2) establishing an equation of motion of a multi-degree of freedom system of an offshore floating wind turbine generator system which is configured with the magneto rheological damper, and establishing equations of motion of the wind turbine generator system and the magneto rheological damper; (3) controlling the magneto rheological damper through a LQR controller and a Fuzzy controller so as to reduce the pitch angle of the floating wind turbine generator system and the longitudinal displacement of a nacelle. According to the invention, the method overcomes the defects of passive control and active control in structural control of a damper, requires less extra energy, requires simple apparatus and is not less susceptible to stability loss, can effectively reduce total load of the floating wind turbine generator system, guarantees stability of a platform, and further increases service life and energy quality of output electricity of a wind turbine generator.

Description

technical field [0001] The invention relates to the technical field of floating offshore wind power generation, in particular to a load reduction control method of a floating wind power unit. Background technique [0002] Although the floating offshore wind turbine itself can utilize the wind energy resources in the deep sea to a great extent, its external load conditions are more complicated than those of the fixed wind turbine on land. The reason is that in addition to the usual wind load, it is also affected by waves. . At the same time, compared with fixed offshore wind turbines, the movement of floating platforms also has a great impact on system power generation. Due to the randomness of wind and waves, fluctuations in environmental loads will cause load fluctuations in wind turbines, making the output power of wind turbines unstable. In particular, the inclined operation of the platform and tower caused by wind and waves will greatly increase the structural load of ...

AI Technical Summary

Problems solved by technology

Among them, the magnetorheological damper, as a new type of intelligent mechanical actuator, has begun to receive widespread attention in the application of semi-active damping control, but it is rarely used in the load shedding control of wind turbines, especially in floating wind turbines.

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