WO2013032112A1

WO2013032112A1 - Rotor lock system and method for a wind power generator

Info

Publication number: WO2013032112A1
Application number: PCT/KR2012/004207
Authority: WO
Inventors: 심필섭
Original assignee: 대우조선해양 주식회사
Priority date: 2011-08-30
Filing date: 2012-05-29
Publication date: 2013-03-07

Abstract

The present invention relates to a wind power generator, and more particularly, to a rotor lock system and method. According to the present invention, provided is a rotor lock system for a wind power generator comprising a rotor position check sensor for final confirmation that a rotor is aligned at a lock position in a rotor lock system for a wind power generator having a rotor lock device for locking a rotor.

Description

Rotor locking system and method of wind generator

The present invention relates to a wind generator, and more particularly to a locking system and method of a rotor.

A wind generator converts wind energy into mechanical energy to drive power by driving the generator. Wind power generators are environmentally friendly generators, which are simple in structure and simple to install, and are increasing in recent years.

When the rotor blade is rotated by the wind, the wind generator drives the generator by increasing the rotational speed of the rotor blades in the gearbox to increase the rotational force of the rotor blades to the generator installed in the rear to produce power.

The blades of the wind generator are connected to the main shaft via hubs, which form the rotor of the wind generator. The rotor is locked to maintain the wind generator.

1 shows a conventional rotor locking method. Referring to FIG. 1, the wind generator 10 includes a blade 11, a low speed rotating portion 12 connected to the blade 11, a gear box 13 connected to the low speed rotating disk 12, and a gear box 13. It has a high speed rotary unit 17 connected to).

Braking devices

15a and 15b are connected to the low speed rotating unit 12 and the high speed rotating unit 17. The rotor hole 12a is provided in the low speed rotation part 12, and the rotor locking device 16 is fitted into the rotor hole 12a to prevent rotation of the rotor.

Conventional rotor locking is carried out through a number of repetitive operations using the blade angle of the blade 11 and the

braking devices

15a and 15b. When the wind is weak, the rotor lock does not rotate well even if the blade blade angle is adjusted. Improvements are required because the work takes a lot and is affected by the skill of the worker.

It is an object of the present invention to provide a rotor locking system and method of a wind generator.

Another object of the present invention is to provide a wind turbine locking system and method that can reduce maintenance time.

According to an aspect of the present invention, a rotor lock system of a wind turbine having a rotor locking device for fixing a rotor, the wind turbine comprising a rotor positioning sensor for final confirmation that the rotor is aligned in the locked position A rotor locking system of the generator may be provided.

The wind generator has a low speed rotation unit for transmitting the rotation of the blade to the gear unit, the rotor position sensor may determine the position of the low speed rotation unit.

The rotor positioning sensor may include a light emitting unit and a light receiving unit corresponding to the light emitting unit, and one of the light emitting unit and the light receiving unit may be rotated together with the rotor.

The rotor locking device may have a locking hole provided on the rotating disk, and the rotor positioning sensor may check the rotation position of the rotating disk provided with the locking hole.

The rotating disk provided with the locking hole may be rotated together with the low speed rotating shaft which transmits the rotation of the blade to the gear.

The wind turbine further includes a low speed rotation unit connected to the blade to transmit the rotational force of the blade to the gear unit, and a high speed rotation unit connected to the gear unit, wherein the rotor locking system includes at least one of the low speed rotation unit and the high speed rotation unit. A rotor angle detection sensor detecting a rotation angle; A braking device connected to at least one of the low speed rotating part and the high speed rotating part; A power converter connected to the high speed rotating unit and rotating the blade at a low speed using a system power; And a main controller configured to receive a signal from the rotor angle detection sensor and output a control signal to the power converter and the locking device.

The rotor angle detection sensor may be a rotary encoder.

The main control device may include a storage unit in which the locked position of the low speed rotation unit is stored.

In addition, according to another embodiment of the present invention, a rotor rotation step of rotating the rotor at low speed by using a system power; A lock position alignment step of detecting a rotation angle of the rotor to align the rotor to the locked position; And a locking position checking step of confirming a final locking position of the rotor.

According to the present invention, all the objects of the present invention described above can be achieved. Specifically, since the locking position of the rotor is finally automatically confirmed, the time for the rotor locking operation of the wind generator is reduced.

In addition, since the rotor is gradually rotated through the power converter using the brake and the system power, the position of the rotor lock and the lock hole is aligned, thereby reducing the working time compared to the conventional method.

1 is a view schematically showing a locking method of a rotor conventionally used in a wind generator.

2 is a view showing a rotor locking system of a wind generator according to an embodiment of the present invention.

3 is a flowchart illustrating a rotor locking method using the rotor locking system of the wind power generator shown in FIG. 2.

Hereinafter, with reference to the drawings will be described in detail the configuration and operation of the embodiment of the present invention.

2 shows a wind generator with a rotor locking system according to one embodiment of the invention.

2, the wind generator 100 includes a blade 110, a low speed rotation unit 120, a gear unit 130, a high speed rotation unit 140, a first braking device 150a, and a second braking. Device 150b, rotor locking device 160, first rotor angle detection sensor 170a, second rotor angle detection sensor 170b, rotor positioning sensor 180, and power converter 190 ), And a main control device 195.

The blade 110 is connected with the low speed rotation unit 120 to produce mechanical rotational energy from the wind. The feather angle of the blade 110 is controlled by the control signal of the main controller 195.

The low speed rotating unit 120 includes a low speed rotating disk 120a and a low speed rotating shaft 120b that passes along the center of the low speed rotating disk 120b and rotates together with the low speed rotating disk 120b. The low speed rotation unit 120 transmits the rotation of the blade 110 to the gear unit 130.

The low speed rotating disk 120a rotates with the low speed rotating shaft 120b. The slow rotating disk 120a is provided with a locking hole 121. The rotor locking device 160 may be inserted into the locking hole 121. When the rotor locking device 160 is inserted into the locking hole 121, the rotor maintains the locked state stably.

The low speed rotating shaft 120b passes through the center of the low speed rotating disk 120a and rotates with the low speed rotating disk 120a. The low speed rotation shaft 120b rotates together with the blade 110 and transmits the rotation of the blade 110 to the gear unit 130. The first rotor angle detection sensor 170a is installed at the low speed rotation shaft 120b.

The gear unit 130 increases the rotation of the low speed rotating unit 120 and transmits the high speed rotating unit 140.

The high speed rotating unit 140 means a generator, and the second rotor angle detection sensor 170b is provided together.

The first braking device 150a operates to brake the rotation of the low speed rotation unit 120. The first braking device 150a receives a control signal from the main control device 195.

The second braking device 150b operates to brake rotation of the high speed rotation unit 140. The second braking device 150b receives a control signal from the main control device 195.

The rotor locking device 160 is movable to be inserted into the locking hole 121 provided in the low speed rotating disk 120a. When the rotor locking device 160 is inserted into the locking hole 121, the rotor remains stable. When the rotor locking device 160 is separated from the locking hole 121, the rotor is rotatable. Becomes The rotor lock 160 operates in accordance with an operation signal or a manual signal of the main control device 195.

The first rotor angle detection sensor 170a detects the rotation angle of the low speed rotation unit 120. In the present embodiment, it will be described that the first rotor angle detection sensor 170a is a rotary encoder. The high speed or low speed rotation angle of the low speed rotation unit 120 detected from the first rotor angle detection sensor 170a is transmitted to the main control device 195.

The second rotor angle detection sensor 170b detects a high speed or a low speed rotation angle of the high speed rotation part 140. In the present embodiment, the second rotor angle detection sensor 170a is described as being a rotary encoder. The rotation angle of the high speed rotation unit 140 detected from the second rotor angle detection sensor 170b is transmitted to the main control device 195.

The rotor positioning sensor 180 includes a light receiving unit 181 and a light emitting unit 182. The rotor position sensor 180 confirms that the locking hole 121 provided in the low speed rotating disk 120a is exactly aligned with the position of the rotor locking device 160. The light receiver 181 detects light emitted from the light emitter 182. The light emitter 182 irradiates light for positioning. The signal from the rotor positioning sensor 180 is transmitted to the main control device 195.

The power converter 190 basically converts the power generated from the high speed rotating unit 140, which is a generator, into a power suitable for supplying the system to supply the system. Although not shown, the power converter 190 may include an AC / DC converter for converting AC power produced by the generator 140 into DC, a DC link receiving DC power from the AC / DC converter, and a DC link. It is provided with a DC / AC inverter for converting the DC power received from the AC power of the same frequency as the system and outputs. The power converter 190 functions to slowly rotate the rotor using a power source of the system during the rotor lock operation. The power converter 190 receives a control signal from the main control device 195.

The main controller 195 receives signals from the first and second rotor

angle detection sensors

170a and 170b and outputs control signals to the power converter 190, the rotor lock 160, and the blade 110. do. The main control unit 195 includes a storage unit in which the position of the locking hole 121 is stored. The main control unit 195 outputs a control signal to the first and

second braking devices

150a and 150b and the power converter 190 during the rotor lock operation to rotate the rotor at a low speed using a power supply of the system. In the process of rotating the rotor at low speed, the angle of the rotor is input to the main control unit 195 and monitored through the first and second rotor

angle detection sensors

170a and 170b, and the locking hole 121 is the rotor locking device ( 160 to stop the rotation of the rotor. After the main control device 195 confirms that the lock hole 121 and the rotor lock device 160 are aligned at the same position through the rotor position sensor 180, the main control device 195 sends a signal to the rotor lock device 160. The locking device 160 is inserted into the locking hole 121.

3 shows a rotor locking method using the rotor locking system of the wind generator shown in FIG. 2. Referring to FIG. 3, the rotor locking method includes a rotor rotation step S10, a lock position alignment step S20, a lock position check step S30, and a lock step S40.

In the rotor rotation step S10, the rotor is gradually rotated through the power converter (190 in FIG. 2) using the first and second braking devices (150a and 150b in FIG. 1) and the power supply of the system.

In the locking position alignment step (S20), the locking holes (121 in FIG. 2) captured from the first and second rotor angle detection sensors (170a and 170b in FIG. 2) are aligned to the position of the rotor locking device (160 in FIG. 2). do.

In the lock position checking step S30, the lock hole (121 of FIG. 2) is accurately confirmed to the rotor locking device (160 of FIG. 2) using the rotor positioning sensor (180 of FIG. 2).

In the locking step S40, the rotor locking device 160 of FIG. 2 is inserted into the rotor hole 121 of FIG. 2.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. The above embodiments may be modified or changed without departing from the spirit and scope of the present invention, and those skilled in the art will recognize that such modifications and changes also belong to the present invention.

Claims

In the rotor lock system of the wind turbine having a rotor lock device for fixing the rotor,

And a rotor positioning sensor for final confirmation that the rotor is aligned in a locked position.
The method according to claim 1,

The wind generator has a low speed rotation unit for transmitting the rotation of the blade to the gear unit, the rotor position sensor is a rotor locking system of the wind turbine, characterized in that for confirming the position of the low speed rotation unit.
The method according to claim 1,

The rotor positioning sensor includes a light emitting unit and a light receiving unit corresponding to the light emitting unit, and any one of the light emitting unit and the light receiving unit rotates together with the rotor.
The method according to claim 1,

The rotor locking device has a locking hole provided on the rotating disk,

The rotor position sensor is a rotor lock system of the wind turbine, characterized in that for confirming the rotation position of the rotating disk provided with the lock hole.
The method according to claim 4,

The rotating disk provided with the locking hole is a rotor locking system of the wind turbine, characterized in that for rotating with a low speed rotating shaft for transmitting the rotation of the blade to the gear.
The method according to claim 1,

The wind turbine further includes a low speed rotation unit connected to the blade to transmit the rotational force of the blade to the gear unit, and a high speed rotation unit connected to the gear unit,

The rotor lock system,

A rotor angle detection sensor detecting a rotation angle of at least one of the low speed rotation unit and the high speed rotation unit;

A braking device connected to at least one of the low speed rotating part and the high speed rotating part;

A power converter connected to the high speed rotating unit and rotating the blade at a low speed using a system power; And

And a main controller for receiving a signal from the rotor angle detection sensor and outputting a control signal to the power converter and the rotor lock.
The method according to claim 6,

And the rotor angle detection sensor is a rotary encoder.
The method according to claim 6,

The main control device has a rotor locking system, characterized in that it comprises a storage unit in which the locking position of the low speed rotation unit is stored.
A rotor rotation step of rotating the rotor at low speed using a system power source;

A lock position alignment step of detecting a rotation angle of the rotor to align the rotor to the locked position; And

And a locking position checking step of finally confirming a locking position of the rotor.