Hydrostatic pressure variable pitch system and control method thereof

A technology of pitch control system and control method, which is applied in engine control, wind engine control, engine function, etc., can solve problems such as low response frequency and low energy density of energy storage methods, and achieve improved integration and reliability, storage Ability to choose flexible effects

Active Publication Date: 2019-04-23
XINJIANG GOLDWIND SCI & TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In wind turbines with large megawatts and long blades, electric pitch is limited by the fatigue or ultimate strength of toothed belts or gears, and the response frequency is low
On the other hand, the traditional valve-controlled cylinder open hydraulic pitch system needs to integrate a large hydraulic station in the engine room and is equipped with consumable parts such as filters and rotary joints, and the energy storage method is limited to energy storage with low energy density. device

Method used

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  • Hydrostatic pressure variable pitch system and control method thereof
  • Hydrostatic pressure variable pitch system and control method thereof
  • Hydrostatic pressure variable pitch system and control method thereof

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The invention provides a hydrostatic pressure pitch control system. figure 1 is a schematic structural diagram of a hydrostatic pitch system 1 according to an embodiment of the present invention. refer to figure 1 , the hydrostatic pitch system 1 includes an electric accumulator 11 , a driver 12 , a motor 13 , a hydraulic pump 14 , an actuator 15 , a valve block 16 and an accumulator 17 .

[0028] An electrical energy storage 11 is connected to the drive to supply power to the drive 12 , the electrical energy storage 11 may be an electrical energy storage based on capacitive or battery technology. The driver 12 is connected to the motor 13 to drive the motor 13 and control the operation of the motor 13 . ...

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Abstract

The invention discloses a hydrostatic pressure variable pitch system and a control method thereof. The hydrostatic pressure variable pitch system comprises an energy storage module, a driver, a motor,a hydraulic pump, a valve block and an executing mechanism, wherein the energy storage module is connected to the driver so as to supply power to the driver; the driver is connected to the motor so as to drive the motor and control the operation of the motor; the motor is connected to the hydraulic pump so as to drive the hydraulic pump; the valve block is connected to the driver, the hydraulic pump and the executing mechanism; the driver controls the valve block to open and close; the hydraulic pump conveys hydraulic oil through the valve block so as to drive the executing mechanism; and theexecuting mechanism is connected to a variable pitch plate so as to drive the variable pitch plate to rotate. The system can have good stability and reliability, and is high in control efficiency andsafe to operate, and the space and the cost are saved.

Description

technical field [0001] The invention belongs to the field of wind power generation, and relates to a hydrostatic pressure variable pitch system and a control method thereof, and the system and method are used for pitch control of a wind power generating set. Background technique [0002] Energy is the main material basis of social economy and human life, and the driving force of social development. However, the reserves of non-renewable energy sources such as oil, coal, and natural gas, which are the main pillars of world energy, are decreasing day by day. At present, many countries are vigorously developing wind power generation. As a new energy source, wind power generation has gradually matured in scale. [0003] A wind turbine is a device that converts wind energy into electrical energy. In the pitch system of wind turbines, an electric scheme in which the blades are driven by an adjustable-speed motor through gears or toothed belts or an open hydraulic pitch system in...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00F05B2260/70F05B2270/604Y02E10/72
Inventor 刘众李庆江
Owner XINJIANG GOLDWIND SCI & TECH
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