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An intelligent ultra-high power hydraulically transmitted power generation unit with low wind speed

A technology for wind turbines and ultra-high power, which is applied to wind turbine components, wind turbine combinations, wind turbines, etc., can solve problems such as cost increase, damage, and difficulties, and achieve the effect of simplifying structure, good control effect, and cost reduction.

Active Publication Date: 2015-09-30
浙江日月昇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But this is a gearbox with a very large gear ratio. The gear ratio is generally between 1:70 and 1:90. Such a large gear ratio has caused a big problem with the gearbox. Too much force on the gear often causes damage. If the transmission power of the gearbox is increased, the volume and weight of the gearbox will be greatly increased, and the total weight of the air cabin on the upper part of the entire unit will increase several times. Therefore, The weight of the nacelle in the aerial part of traditional wind turbines ranges from dozens to hundreds of tons, and the largest even reaches 300 tons (see the "giant 5 megawatt wind power" in the special report "Super Engineering" of CCTV in September 2012). Generator set", the weight of the chassis on the top is 300 tons), and the proportion of the gearbox accounts for about 1 / 3 of the weight of the entire air cabin. Such a large weight hangs on a steel that is not particularly thick On the barrel, it is undoubtedly very unsafe in the case of the unpredictable wind force of nature, not only greatly increases the cost, but also brings great troubles and difficulties to the manufacture and installation

Method used

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  • An intelligent ultra-high power hydraulically transmitted power generation unit with low wind speed
  • An intelligent ultra-high power hydraulically transmitted power generation unit with low wind speed
  • An intelligent ultra-high power hydraulically transmitted power generation unit with low wind speed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 50 kW full power hydraulic low wind speed wind turbine:

[0031] Wind wheel diameter: 18 meters;

[0032] Windward area: (swept area): 254.34 square meters (value: 200±10% watts wind energy density per square meter);

[0033] Output power: 50 kW (wind speed = 8m / s; 4-5 wind hours);

[0034] Blade form: airfoil NACA4418 low wind speed airfoil;

[0035] Number of blades: 3 pieces;

[0036] Design rated wind speed: 8m / s (4-5 wind);

[0037] Rated power: 50 kW (maximum 85 kW);

[0038] Actual power range: output 10-30 kW power when the wind speed is 3-7m / s (2~grade wind); output 50 kW power when the wind speed is 8m / s; output 85 kW power when the wind speed is 14m / s;

[0039] Starting wind speed (cut-in wind speed): ≤3m / s;

[0040] Working wind speed: 3-20m / s; (when the wind speed is above 14m / s, the hydraulic mechanism will perform blade smoothing and braking action, and when the wind speed is 20m / s, the wind wheel will be yawed and stopped by...

Embodiment

[0049] 200 kW full power hydraulic low wind speed wind turbine:

[0050] Wind wheel diameter: 38 meters;

[0051] Windward area: (swept area): 1017.36 square meters (200±10% watts wind energy density per square meter);

[0052] Output power: 203.5 kW (wind speed = 8m / s; 4-5 wind hours);

[0053] Blade form: airfoil NACA4418 low wind speed airfoil;

[0054] Number of blades: 3 pieces;

[0055] Design rated wind speed: 8m / s (4-5 wind);

[0056] Rated power: 203.5 kW (maximum 350 kW);

[0057] Actual power range: output 50-90 kW power when the wind speed is 3-7m / s (2~grade wind); output 203 kW power when the wind speed is 8m / s; output 350 kW power when the wind speed is 14m / s;

[0058] Starting wind speed (cut-in wind speed): ≤3m / s;

[0059] Working wind speed: 3-20m / s; (when the wind speed is above 14m / s, the hydraulic mechanism will perform blade smoothing and braking action, and when the wind speed is 20m / s, the wind wheel will be yawed an...

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Abstract

The invention provides an intelligent ultrahigh power hydraulic power-transferring low-wind-speed wind generating set which comprises a blade wind wheel and is characterized in that: the blade wind wheel is connected with an intelligent ultrahigh power hydraulic power-transferring system, and the intelligent ultrahigh power hydraulic power-transferring system is connected with a generator. The intelligent ultrahigh power hydraulic power-transferring low-wind-speed wind generating set has the advantages that: the cost is greatly lowered and the structure is simplified; the wind energy utilization rate of the wind generating set is increased; the electric energy output characteristic of the wind generating set is also greatly promoted; the mode of the wind generating set is much better than the original mode of mechanically transferring the wind electric power; and the wind generating set has excellent grid-connected and harmonious properties, has excellent low-voltage ride-through property and also shows an excellent off-grid independent running characteristic.

Description

technical field [0001] The invention belongs to the technical field of medium and large-scale wind power, and in particular relates to an intelligent low-wind-speed wind power generating set with ultra-high power hydraulic power transmission. Background technique [0002] Modern medium-sized and large-scale wind turbines use mechanical methods to generate wind energy. The process from collecting wind energy to the final output of electric energy is: wind energy → mechanical energy → gearbox → generator mode. This mode ends with The quality of the output power is poor and the fluctuation range is large, because there is no means of energy storage and energy balance, and it is directly affected by the change of wind speed. run independently. [0003] This traditional power transmission mode of wind turbines has been developed for decades, and its power output characteristics with large fluctuations have been widely criticized by people. With the support of the national gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D9/02F03D11/02
CPCY02E10/722Y02E60/16Y02E10/72
Inventor 俞海键毛华
Owner 浙江日月昇科技有限公司
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