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Double-feed type variable speed constant frequency wind turbine generator sets

A wind turbine, variable speed and constant frequency technology, applied in wind turbine combination, wind turbine, wind turbine control and other directions, can solve the problems of insignificant control target effect, complex control implementation, complex vector decoupling calculation, etc.

Inactive Publication Date: 2008-12-03
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current wind turbines all use the stator field-oriented vector control method to achieve rotor speed regulation, which has complex vector decoupling calculations, complex control implementation, and the control target effect is not obvious

Method used

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  • Double-feed type variable speed constant frequency wind turbine generator sets
  • Double-feed type variable speed constant frequency wind turbine generator sets
  • Double-feed type variable speed constant frequency wind turbine generator sets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Embodiment 1: as figure 1 Shown, the present invention comprises front nacelle chassis 9, rear nacelle chassis 10, generator 8, speed-up box 1 and wind wheel, and wind wheel comprises wheel hub 5 and blade, and blade is connected with three ports of wheel hub 5, and front nacelle chassis 9 and The connecting surface between the rear nacelle chassis 10 is an inclined plane, the rear nacelle chassis 10 is fixed on the tower, the generator 8 is placed on the rear nacelle chassis 10, and the speed increasing box 1 is placed on the front nacelle chassis 9; The shaft device 7 is connected with the speed-up box 1 , and the speed-up box 1 and the hub 5 are connected through the end cover 3 .

[0095] Such as image 3 , Figure 4 Shown, the inclination angle of the slope between the front cabin chassis 9 and the rear cabin chassis 10 is 40 ° in this example; Due to the effect of the inclined plane and the crotch, the force borne by the front section nacelle chassis 9 acts on...

Embodiment 2

[0107] Embodiment 2: the present invention comprises front nacelle chassis 9, rear nacelle chassis 10, generator 8, speed-increasing box 1 and wind wheel, and the connecting surface between front nacelle chassis 9 and rear nacelle chassis 10 is an inclined plane, and rear nacelle chassis 10 is fixed On the tower, the generator 8 is placed on the rear engine room chassis 10, and the speed increasing box 1 is placed on the front engine room chassis 9; They are connected by end cap 3.

[0108] Such as image 3 , Figure 4 Shown, the inclination angle of the slope between the front cabin chassis 9 and the rear cabin chassis 10 is 38 ° in this example; Due to the effect of the inclined plane and the crotch, the force borne by the front section nacelle chassis 9 acts on the inclined plane, and the power is transmitted to the tower through the inclined plane.

[0109] Spindle diameter: d ≥ A 0 P ...

Embodiment 3

[0116] Embodiment 3: The structure of this example is the same as that of Embodiment 2, as figure 2 As shown, only the inclination angle of the slope between the front cabin chassis 9 and the rear cabin chassis 10 is 43 °;

[0117] Spindle diameter: d ≥ A 0 P / n 3 ≥ 334.2 mm

[0118] A 0 = 9550000 / 0.2 [ τ ] T 3 ,

[0119] [τ] T ——Allowable torsional shear stress, 200Mpa,

[0120] P——the power transmitted by the shaft, 1000Kw,

[0121] n - the rotational speed of the shaft, 1600r / min.

[0122] The structure of end cap 3 in this example, such as ...

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Abstract

The invention relates to a dual-feedback variable-speed constant-frequency wind-driven generator, comprising a chassis of front cabin, a chassis of back cabin, a generator, an accelerating box, a wind wheel, and a controller. The connecting face between the chassis of front cabin and the chassis of back cabin is inclined. The chassis of back cabin is fixed on the tower support. The generator is arranged on the chassis of back cabin. The accelerating box is arranged on the chassis of front cabin. The generator via the coupler is connected with the accelerating box. The accelerating box and the hub of wind wheel are connected via the end cover. The controller is connected with the generator, the accelerating box, the blade of wind wheel, and the main axle. The invention can improve the stability of wind-driven generator. The inclined chassis of cabin can reduce the axial interference of accelerating box and the generator, and stabilize the chassis. The invention also realizes the speed adjustment of variable-speed wind-driven generator, to avoid complex vector calculation.

Description

technical field [0001] The invention belongs to the technical field of wind power generators, in particular to a double-fed variable-speed constant-frequency wind power generator. Background technique [0002] Wind energy utilization is the most mature type of renewable energy technology. Wind power generators are equipment that convert wind energy into conventional electrical energy. There are many types of such equipment. The transmission shaft of the existing horizontal-axis three-blade grid-connected wind turbine is horizontal, that is, the rotational speed of the wind wheel is transmitted to the generator through the main shaft, the gearbox and the coupling. One end of the main shaft is connected to one end of the hub in a megawatt-level wind turbine. In this way, the main shaft not only bears the torque of the wind wheel, but also receives the bending moment and axial aerodynamic thrust of the wind wheel. Due to the weight of the wind wheel It is relatively large, so ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D9/00F03D7/00H02P9/14H02P9/04F03D9/25
CPCY02E10/723Y02E10/72
Inventor 姚兴佳王湘明杨树人邢作霞孙传中
Owner SHENYANG POLYTECHNIC UNIV
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