Wind power generation system having flywheel and one-pole dc magnetic driver

A wind power generation system and flywheel technology, applied in wind power generation, wind turbines, wind turbine combinations, etc., can solve the problems of low total efficiency of variable frequency motor + frequency converter, lower power quality, and unstable wind power generation.

CN105140943AActive Publication Date: 2015-12-09徐立民
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-12-09

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Abstract

The invention relates to a wind power generation system. According to the wind power generation system, flywheels are taken as energy storage devices, a one-pole dc magnetic driver (HET) is taken as flywheel energy transmission equipment, the stable power generation function is realized, and energy transmission advantages of the HET perform; a vertical flexible flywheel and a suspension type flexible flywheel are further employed, problems of a large-mass flywheel and a bearing are solved. HET speed change transmission is employed between the flywheel and a generator to greatly improve wind energy capture efficiency. Three schemes for energy transmission among a wind wheel, the generator and the flywheel, the first scheme is a no-HET scheme between the wind wheel and the generator, namely, an energy storage device and energy transmission equipment thereof are added to a routine wind power system in the prior art, the second scheme is an independent HET scheme between the wind wheel and the generator, the third scheme is a scheme through which the wind wheel, the generator and the flywheel are respectively connected with one HET half matching part.
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Description

Technical field

[0001] The invention relates to a wind power generation system, in particular to a wind power generation system with an energy storage device. Background technique

[0002] Wind power is recognized as a green energy with broad prospects. The current technology has been successfully applied for a long time, and the economic competitiveness of the wind power system itself is constantly improving. However, from the overall perspective of the power grid, there are still the following problems in terms of comprehensive indicators: due to the great instability and randomness of the wind speed, the wind power obtained by the wind wheel is always fluctuating in a large range, and there is no energy storage The power generation of the installed wind power generation system is very unstable, and the installed capacity of wind turbines is generally not regarded as a stable and reliable power generation capacity in the power grid. , due to the instability and unplanned ...

Examples

Embodiment Construction

[0265] A 1.5MW wind power system with flywheel and HET ( Figure 21 ) The specific embodiment is as follows.

[0266] The system includes: a horizontal shaft variable-pitch blade rotor, a horizontal speed-up gearbox connected to the rotor shaft, a unipolar DC electromagnetic transmission (HETw) connected to the output shaft of the gearbox and indirectly connected to the generator shaft, A horizontal synchronous generator, a suspended flexible flywheel device, a unipolar DC electromagnetic transmission (HETf) connecting the flywheel shaft and the generator shaft, a mechanical brake device at the wind rotor shaft, and a yaw drive active pair Wind mechanism, a nacelle, a tower, and control and ancillary systems.

[0267] The wind rotor adopts three airfoil profile blades, the maximum value of wind energy utilization coefficient Cp is 0.47, and the corresponding optimal tip speed ratio is 7, and the rated design point applies the optimal tip speed ratio and the maximum Cp value. ...