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
CN101555871AActive Publication Date: 2009-10-14CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
Publication Date
2009-10-14

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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 exciter by 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 absorb and 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.
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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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