Megawatt grade wind generator set speed change and distance change control system

A technology for wind turbines and control systems, applied in control systems, DC motor speed/torque control, wind turbine control, etc. The effect of reducing the impulse, improving the power generation efficiency, and enhancing the protection function
CN1410669AInactive Publication Date: 2003-04-16SHENYANG POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENYANG POLYTECHNIC UNIV
Publication Date
2003-04-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The structure of the system includes three parts: the control part, the detection part and the drive part. The control part consists of three parts: the main controller i.e. the operation controller,the distance change control and the speed change controller. The detection part includes the wind wheel rotor, the stator of double fed generator, the variable frequency power supply of speed drop excitation and the invention power source of pulse-width modulation etc. assembled sensors. The drive part is composed of the servomotors with different functions. The sensed signals are output from thedetection part. The control signals output from the interlinkage drive module controls harmonious operation. The invention provides the features of simple structure, stable and reliable running and flexible control.
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Description

Technical field

[0001] The invention relates to a wind power generation control system, which is suitable for use in variable speed and pitch control of megawatt-level wind turbines. Background technique

[0002] At present, there are mainly two types of grid-connected wind turbines in my country, one is a fixed-pitch stall-type wind turbine; the other is a variable-pitch wind turbine, and both models have developed 600KW prototypes. However, The first type has the disadvantage of low wind capture efficiency. Although the second type has higher wind capture efficiency than the first type, the strong gust impact of the unit makes the wind wheel, transmission system, and hub of the unit Components such as main shaft, gearbox and generator are subject to strong uneven impact and vibration, so the service life is greatly reduced. Contents of the invention

[0003] In order to realize variable speed and constant frequency control of wind power generators, the object of the prese...

Claims

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