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Hydraulic aeroelastic variable pitch system based on fully-distributed type optical fiber sensing differential pressure feedback, control method and control parameter calculating method

A fully distributed, variable pitch system technology, applied in the field of wind turbine control, can solve problems such as flutter fracture failure, achieve the effects of reduced external load, high reliability, and simple control

Inactive Publication Date: 2018-12-18
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Wind turbine blades may fail due to flutter fracture under nonlinear aerodynamic drive

Method used

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  • Hydraulic aeroelastic variable pitch system based on fully-distributed type optical fiber sensing differential pressure feedback, control method and control parameter calculating method
  • Hydraulic aeroelastic variable pitch system based on fully-distributed type optical fiber sensing differential pressure feedback, control method and control parameter calculating method
  • Hydraulic aeroelastic variable pitch system based on fully-distributed type optical fiber sensing differential pressure feedback, control method and control parameter calculating method

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Embodiment Construction

[0042] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0043] refer to figure 1 The hydraulic aeroelastic pitch system based on fully distributed optical fiber sensing differential pressure feedback in the embodiment of the present invention includes: a wind turbine, a signal acquisition system, a pitch control system and a hydraulic execution system; When the power acts, a large waving deformation will be generated in the dangerous section area, and the deformation is converted into an electrical signal, which is transmitted to the pitch control system by the signal acquisition system. The propeller drive law is transmitted to the hydraulic actuator system, and the hydraulic actuator system drives the blades to change ...

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Abstract

The invention provides a hydraulic aeroelastic variable pitch system based on fully-distributed type optical fiber sensing differential pressure feedback and a control method. The wind turbine blade aeroelastic stability is improved, and accordingly the fluttering fracture failure phenomenon possibly happening is restrained. The hydraulic aeroelastic variable pitch system comprises a wind turbine,a signal obtaining system, a variable pitch control system and a hydraulic executing system. An optical fiber differential pressure sensor is arranged in each wind turbine blade for measuring the displacement differential pressure of the wind turbine blade. The signal obtaining system is arranged in a hub and used for receiving displacement differential pressure signals and conducting encoding treatment. The variable pitch control system and the hydraulic executing system are arranged in a cabin, the variable pitch control system comprises a PAC variable pitch controller used for judging theprocessed signals, RBF neural network control is conducted according to a judgment result, a corresponding control result instruction is sent to the hydraulic executing system, and the hydraulic executing system conducts variable pitch control on the wind turbine blades.

Description

technical field [0001] The present invention relates to a pitch change system and a control method, in particular to a hydraulic aeroelastic pitch change system based on a fully distributed optical fiber sensing differential pressure feedback and a method for calculating control parameters of the control method, belonging to the technical field of wind power generator control . Background technique [0002] In recent years, new energy technologies for wind power generation have been greatly developed, especially wind energy capture machinery. Driven by nonlinear aerodynamic force, wind turbine blades may fail due to flutter fracture. For medium-sized wind turbine blades, the influence of aerodynamic force can be attenuated by their own timely pitch movement. General conventional pitching motions tend to focus on the improvement of power and energy acquisition. The pitching motion described in this design is based on the combined effect of dangerous section and flutter wind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D7/04
CPCF03D7/0224F03D7/0296F03D7/04F03D7/044F03D7/045F03D7/046F05B2270/604Y02E10/72
Inventor 刘廷瑞常林易成宏
Owner SHANDONG UNIV OF SCI & TECH
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