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Load shedding method for floating wind turbines based on semi-active structural control of magnetorheological dampers

A magneto-rheological damper and structure control technology, which is applied in the direction of machine/engine, control algorithm type, wind engine control, etc., can solve the problem of less application, improve output power quality, reduce external energy, and increase service life Effect

Inactive Publication Date: 2019-06-21
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Load shedding method for floating wind turbines based on semi-active structural control of magnetorheological dampers
  • Load shedding method for floating wind turbines based on semi-active structural control of magnetorheological dampers
  • Load shedding method for floating wind turbines based on semi-active structural control of magnetorheological dampers

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] As shown in the figure, this embodiment is based on the semi-active structural control method of the magneto-rheological damper for floating wind turbine load reduction, including the following steps:

[0024] 1) Analyze the structure of the magnetorheological damper, and obtain the force-displacement relation of the magnetorheological damper:

[0025] In the formula, F MR-TMD is the magnetorheological damping force, C 0 is the damping coefficient, is the displacement of the piston relative to the cylinder, f c is the Coulomb force, f 0 is the friction force generated by the compensator;

[0026] 2) Establish the motion equation of the multi-degree-of-freedom structural system of the offshore floating wind turbine equipped with the magnetorheological damper, and use the Kane dynamic equation to establish the motion equations of the wind t...

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Abstract

The invention discloses a load reduction method for a floating wind turbine based on the semi-active structure control of a magnetorheological damper, comprising the steps of: 1) analyzing the structure of the magnetorheological damper to obtain the force-displacement relationship of the magnetorheological damper 2) Establish the motion equation of the multi-degree-of-freedom structural system of the offshore floating wind turbine equipped with the magnetorheological damper, and establish the motion equation of the wind turbine and the magnetorheological damper; 3) use the LQR controller and the Fuzzy controller to control the magnetic The rheological damper is controlled to reduce the platform pitch angle of the floating wind turbine and the longitudinal displacement of the nacelle. The present invention abandons the shortcomings of passive control and active control in damper structure control, requires little external energy for control, is simple in device, is not easy to lose stability, can effectively reduce the overall load of floating wind turbines, and to a certain extent Ensure the stability of the floating platform, thereby improving the service life of the wind turbine and the quality of output power.

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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50F03D9/30F03D7/00G06Q10/04G06Q50/06
CPCF03D7/00F03D9/00G06Q10/04G06Q50/06B63B39/02B63B2035/446F03D7/0296F03D7/043F05B2240/93F05B2260/964F05B2270/707Y02E10/72
Inventor 王磊张虎蔡明沈涛陈柳
Owner CHONGQING UNIV
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