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Variable pitch and variable speed wind generating set

A technology of wind power generating set and variable pitch, which is applied in the direction of wind motor combination, wind engine, and wind engine consistent with the wind direction. and other issues, to achieve the effect of light weight, small volume, and small load impact

Active Publication Date: 2011-04-27
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention is to provide a variable-pitch and variable-speed wind power generating set to solve the above-mentioned variable-pitch variable-speed constant-frequency wind power generating set, which has the problems of slow response speed of the hydraulic pitch device, hydraulic oil leakage, large generator volume, Disadvantages of heavy quality, poor reliability, high cost, short life, and complex control

Method used

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  • Variable pitch and variable speed wind generating set
  • Variable pitch and variable speed wind generating set
  • Variable pitch and variable speed wind generating set

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Embodiment Construction

[0026] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0027] The invention adopts the structural form of a three-bladed wind turbine, a speed-increasing box, a synchronous generator with a coaxial exciter, and a full-power frequency converter, and belongs to a variable-pitch variable-speed constant-frequency wind power generating set. like figure 1 As shown, it includes wind rotor blade 1, electric drive synchronous pitch device 2, wheel hub 3, main shaft bearing 4, main shaft 5, speed-up box 6, high-speed shaft mechanical brake 7, coupling 8, and coaxial exciter The synchronous generator 9, the yaw device 10, the frame 11, the tower 12 and the control system integrating the control of yaw, pitch, variable speed, constant frequency, etc.

[0028] The connection is: the front part is a wind turbine equipped with three blades, and th...

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Abstract

The invention discloses a variable pitch and variable speed wind generating set, comprising a three-blade wind turbine for collecting wind energy. A wheel hub of the three-blade wind turbine is internally provided with a variable pitch device; a main shaft of the three-blade wind turbine is connected with a speed-increasing box which is connected with a synchronous generator with a coaxial exciterby a coupler; and the variable pitch device and the synchronous generator are connected with a PLC control panel which is used for controlling the connected variable pitch device to adjust blade angle, thus adjusting an output power value of the generator. The wind generating set adopts the combination of a variable pitch controller and a power controller, completes optimization to the output power of the set and leads the set to operate in optimal state, thus obtaining maximum wind energy utilization ratio and improving the generating efficiency of the set. The wind generating set can absorband release transient wind energy, has smooth and stable output power of the set, good electric energy quality and small shock to load of a transmission mechanism. A frequency converter has high reliability and the cycle operation speed of a main controller of the wind generating set is high.

Description

technical field [0001] The invention relates to a generator, in particular to a variable-pitch and variable-speed wind power generating set. Background technique [0002] At present, there are mainly two types of grid-connected wind turbines in my country: one is fixed-pitch, constant-speed, and constant-frequency wind turbines, which consist of wind turbines, main shafts, gearboxes, squirrel-cage three-phase asynchronous generators and control systems. composition. The other is variable-pitch variable-speed constant-frequency wind turbines, which have two forms: the first type: a pitch-variable device, a wind turbine, a main shaft, a speed-up box, a doubly-fed asynchronous generator, a four-quadrant two-way flow device and control system. The second type: It consists of a pitch control device, a wind turbine, a main shaft, a permanent magnet synchronous generator, a full-power unidirectional converter and a control system. [0003] Fixed-pitch, constant-speed, and constan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D9/00F03D7/04F03D1/00F03D9/25
CPCY02E10/72Y02E10/723
Inventor 汤文兵欧阳海黎唐永春吴星华余强刘静刘瑾闫中杰刘杰
Owner CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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