Method for inhibiting ice load of offshore wind turbine based on variable pitch control

An offshore wind turbine and ice suppression technology, which is applied in the control of generators, control systems, engine control, etc., can solve the problems of difficult installation and adjustment, inability to guarantee real-time performance of wind turbines, and poor flexibility

Active Publication Date: 2020-06-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Description
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Problems solved by technology

However, these existing technologies mainly focus on the protection of wind turbines in physical methods, and they will face many problems in the complex and changeable environment at sea, such as: installation and adjustment are difficult, high cost, real-time performance of wind turbines cannot be guaranteed, and flexibility is poor

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  • Method for inhibiting ice load of offshore wind turbine based on variable pitch control
  • Method for inhibiting ice load of offshore wind turbine based on variable pitch control
  • Method for inhibiting ice load of offshore wind turbine based on variable pitch control

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Embodiment Construction

[0064] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0065] In this embodiment, a 5MW modern variable-speed variable-pitch offshore wind turbine is used as the research object, and a high-fidelity simulator is used for simulation, and the sampling time is 0.01s.

[0066] figure 1 It is a schematic diagram of the implementation steps of the method of suppressing ice load for offshore wind turbines based on pitch control.

[0067] Step 1 Model building process is as follows:

[0068] (1) Wind turbine model

[0069] 1) Aerodynamic model

[0070] The aerodynamic system of the fan is the key to the wind energy captured by the fan. According to the Betz theory, the aerodynamic power and mechanical torque of the rotor captured by the fan are:

[0071]

[0072]

[0073] where ρ a is air density; R is fan rotor radius; v w is the average wind speed passing through the wind rotor; C P (λ, β) is the rotor power coeff...

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Abstract

The invention discloses a method for inhibiting ice load of an offshore wind turbine based on variable pitch control. The method comprises that: firstly, a wind turbine mechanism model, an ice load mechanism model and a structural vibration mechanism model are established for qualitatively and quantitatively analyzing the influence of the ice load on the wind turbine; then, the influence of different types of ice loads on the draught fan is determined through field testing or simulation, the influence comprises power fluctuation and mechanical fatigue load increase, and a proper control targetis selected according to the influence of the ice loads on the draught fan; then, the pitch angle is used as a controlled variable, and the ice load of the offshore wind turbine is restrained througha variable pitch control mode of predictive control or robust control or optimal gain scheduling control; preferably, a predictive control mode is adopted; and finally, based on field fan actual testing or high-fidelity simulation software, the inhibiting effect of variable pitch control on the ice load is verified.

Description

technical field [0001] The invention relates to a method for suppressing ice loads of offshore wind turbines, in particular to the joint mechanism modeling of offshore wind turbine models, sea ice load models and structural vibration models, based on the above model to track the stability of wind turbine power under ice loads and the displacement of tower tops With reduction as the goal, the controller is designed using pitch control to suppress the adverse effects of ice load on the wind turbine. Background technique [0002] In cold and icy areas, severe ice-induced vibrations will occur when offshore wind turbines are hit by ice floes, which will aggravate the vibration of the wind turbine tower structure and loose flanges, reduce the life of the wind turbine, and even lead to the collapse of the wind turbine. cause huge economic losses. For example, in China's Bohai Sea in 1969 and 1979, the collapse of the offshore jacket platform caused by severe ice-induced vibration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/00F03D7/00F03D80/40G06F30/20G06F113/06
CPCH02P9/006F03D7/00F03D80/40F05B2270/328Y02E10/72
Inventor 宋子秋胡阳房方余照国刘吉臻
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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