KR20130128795A - Windmill - Google Patents

Abstract

An aerogenerator is disclosed. the aerogenerator according to an embodiment of the present invention is arranged on one side of a blade rotated by wind and includes an external temperature sensing module sensing external temperature in a predetermined position; a heating module connected to the blade to be able to detached and preventing icing from being generated in the blade by generating heat when a current is supplied; and a controller controlling the current supplied to a heating module based on information on the external temperature sensed in the external temperature sensing module.

Description

Wind Power Generators {WINDMILL}

The present invention relates to a wind power generator, and more specifically, it is possible to fundamentally prevent the occurrence of risk factors such as falling of the adherent or ice, as in the prior art, it is possible to check the icing of the blade with high accuracy and simple and efficient ice making Or it relates to a wind power generator capable of performing ice.

Wind power generators (or wind turbines) are devices that produce electrical energy from wind-based rotational energy, and their weight is increasing due to depletion of fossil fuels and environmental problems.

The wind turbine includes a rotor having a plurality of blades rotated by the wind connected to a hub and a nacelle cover for supporting and protecting a nacelle connected to the rotor. And a tower for supporting the nacelle cover.

The blade uses aerodynamically designed geometry to generate a useful aerodynamic torque in the wind's energy and generates electricity by rotating the generator using this aerodynamic torque.

The aerodynamic shape of the blade is important to increase the amount of electricity generated. It must also be able to adequately support the loads structurally derived from its shape.

The load is dominated by the aerodynamic shape, but it is another important design technique to design the blade as light as possible while supporting the same load through a structurally optimal design.

 High utilization rates are needed for the blade power generation of wind turbines and should always be operated regardless of the weather.

However, wind turbines are subject to weather, and under certain conditions, so-called icing occurs, where ice forms in the front end of the blade.

These icing phenomena can take many forms in specific regions or climatic conditions, especially for onshore wind turbines, which are dangerous for people living in or moving around because of the high risk of falling ice on blades. It can also be an element.

In addition, ice is generally generated in the front end region of the blade. When ice is generated in the front end region of the blade, the aerodynamic characteristics of the blade are deteriorated, which may cause excessive vibration due to unbalanced mass of the blade. have.

In view of these various points, it is necessary to effectively remove ice, and for this purpose, appropriate de-icing or anti-icing technology development is required. It is proposed as 2010-0079520.

The document includes a deposit provided on the blade in the form of a lid to remove condensation formed on the blade and removed with ice, and a temperature sensor for detecting the detachment of the deposit. At this time, the temperature sensor presets the temperature when a certain amount of condensation is generated after a predetermined time from experimental data, and then compares the preset data with the actual measured temperature to determine whether to remove the deposit from the blade. If it is determined that this has not been removed, a signal is transmitted so that a current is applied to the hot wire around the deposit so that the deposit is forcibly removed with ice by heat.

However, in the case of the prior art, the use of attachments that come off together with the ice is a high risk for people living in or moving around the wind generator, and also use a very common temperature sensor. As the sensing performance of the icing is slightly lowered, it may be difficult to efficiently perform ice making or ice making. Therefore, an appropriate and efficient ice making or ice making technique is required.

Korean Patent Office Publication No. 10-2010-0079520

Therefore, the technical problem to be achieved by the present invention, it is possible to fundamentally block the occurrence of risk factors, such as falling of the attachment or ice, as in the prior art, it is possible to check the icing of the blade with high accuracy and simple, and to efficiently perform ice making or deicing It is to provide a wind turbine that can.

According to an aspect of the present invention, an air temperature sensing module is disposed on one side of a blade (blade) rotated by wind, and detects the outside air temperature at a corresponding position; A heat generating module detachably coupled to the blade and configured to prevent an icing phenomenon from occurring on the blade while being heated when a current is supplied; And a controller configured to control whether or not a current is supplied to the heat generating module based on the outside temperature information sensed by the outside temperature sensing module.

The outside temperature sensing module may detect the outside temperature based on a characteristic in which the natural frequency of the fluid is changed according to the temperature condition of the outside air.

The outside temperature sensing module may include a module housing filled with a fluid whose natural frequency is changed according to the temperature condition of the outside air.

The heating module may be an arc-type heating plate having a curvature corresponding to the curvature of the blade.

The arc-type heating plate may be coupled to the front end region of the blade.

The outside temperature sensing module may be coupled to the heating module.

The outside temperature sensing module may be disposed along a virtual center line of the heating module.

The outside temperature sensing module may be coupled to the heating module to be exposed to the outside of the heating module.

The heating module may further include a module accommodating part in which the external air temperature sensing module is partially accommodated, and the module accommodating part may be provided with a gripper for gripping the external air temperature sensing module from the module accommodating part. have.

The outside temperature sensing module may be coupled to the heating module to be embedded in the heating module, and a plurality of slits may be formed in an area in which the outside temperature sensing module is located.

The heat generating module may be disposed on an inner wall or an outer wall of the blade, and may further include a current supply unit connected to the heat generating module to supply a current to the heat generating module, and the controller is configured to generate the heat generating module through the current supply unit. You can control the furnace's current supply, time, or its strength.

According to the present invention, it is possible to fundamentally block the occurrence of risk factors, such as falling of the attachment or ice as in the prior art, it is possible to check the icing of the blade with a simple and high accuracy, it is possible to perform ice making or deicing efficiently.

1 is a side view of a wind power generator according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of the blade shown in FIG. 1.
3 is a sectional view taken along the line AA in Fig.
4 is a perspective view of the outside temperature sensing module and the heating module.
5 is a control block diagram of the wind turbine shown in FIG.
6 is a schematic partial cross-sectional structural view of the heat generating module region in the wind power generator according to the second embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a side view of a wind power generator according to a first embodiment of the present invention.

Referring to this figure, the wind power generator of this embodiment supports a plurality of blades (110) connected to a nacelle (not shown) and rotated by wind, and an axial load of the nacelle and the blades 110. Is disposed on one side of the tower 120, the blade 110, the outside air temperature sensing module 150 (see Fig. 4) for detecting the outside temperature at the corresponding position, and detachably coupled to the blade 110 When the current is supplied, the heating module 150 prevents the occurrence of the icing phenomenon in the blade 110 and the heating module based on the outside temperature information detected by the outside temperature sensing module 130. And a controller 170 (see FIG. 5) for controlling the supply of current to the controller 150.

The blade 110 is a kind of wing that rotates by wind to generate a rotational motion.

The blades 110 disposed radially with respect to the hub 101 may have a streamlined wing shape to be easily rotated by wind, and two or more blades 110 may be applied. Three blades 110 are applied to the wind power generator of this embodiment, but the scope of the present invention is not limited by the number thereof.

Hub 101 is a place where a plurality of blades 110 are connected. The hub 101 and the plurality of blades 110 may be collectively referred to as a rotor.

The hub 101 may have a substantially circular shape when viewed from the front, and may have a dome shape when viewed from the side.

The hub 101 is connected to a nacelle (not shown) that generates electric power by receiving the rotational movement of the blade 110 and generates electric energy, and the nacelle is protected by the nacelle cover 103. .

As mentioned earlier, the nacelle is a mechanical component that plays an important role in driving a wind power generator, such as a main shaft (main) It is the collective name for a structure in which mechanical parts such as a shaft, a gear box (not shown) and a generator (not shown) are structurally combined.

The nacelle cover 103 is coupled to the outside of the nacelle serves to protect the nacelle. Since the nacelle cover 103 is exposed to the outside air as it is, it is always exposed to snow, rain or sunlight, so that some degree of rigidity must be ensured. Therefore, the nacelle cover 103 may be made of a plastic or metal composite material having excellent durability.

The tower 120 is an axis arranged vertically long and supports an axial load on a structure such as a plurality of blades 110, a hub 101, a nacelle and a nacelle cover 103. The tower 120 may be divided into a lower tower at a lower portion and an upper tower at an upper portion by position.

The tower 120 is a hollow pipe-type structure, and a cable or the like is passed through the inner empty space of the tower 120. The cable may be various kinds of cables including power cables for power transmission, cables for communication, and the like.

FIG. 2 is an enlarged view of the blade shown in FIG. 1, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, FIG. 4 is a perspective view of the outside air temperature sensing module and the heating module, and FIG. 5 is the wind power shown in FIG. 1. This is a control block diagram of a generator.

Referring to these drawings, the wind power generator of the present embodiment, as described above, includes an outside temperature sensing module 130, a heating module 150, and a controller 170.

The outside air temperature sensing module 130 detects the outside air temperature at the position coupled to the heating module 150.

The outside air temperature sensing module 130 applied to the present embodiment senses the outside air temperature based on a characteristic of changing the natural frequency (frequency) of the fluid according to the temperature condition of the outside air, rather than a simple temperature sensor as in the related art.

Therefore, the outside temperature sensing module 130 includes a module housing 131 filled with a fluid whose natural frequency is changed according to the temperature condition of the outside air.

In other words, the ambient temperature sensing module 130 applied in the present embodiment has a structure in which the module housing 131 is coupled to the heat generating module 150 in a state where the fluid is accommodated in the module housing 131.

Of course, since the scope of the present invention does not need to be limited thereto, the outside temperature sensing module 130 does not necessarily need to be coupled to the heating module 150. That is, you may provide in the suitable position of the blade 110.

However, when the outside temperature sensing module 130 is coupled to the heating module 150 as in this embodiment, the outside temperature sensing module 130 and the heating module 150 can be treated as one set, thus installing or maintaining Will have the advantage of being convenient.

The heating module 150 serves to prevent the occurrence of an icing phenomenon in the blade 110 while generating heat when a current is supplied.

The heating module 150 may be implemented in various forms. In the present embodiment, the heating module 150 is used as an arc-type heating plate having a curvature corresponding to the curvature of the blade 110.

The heating module 150 as the arc heating plate may be made of a metal material, such as aluminum alloy or stainless steel, which can be easily generated by current and is resistant to corrosion.

The heating module 150 as the arc heating plate may be disposed on the inner wall or the outer wall of the blade 110. The heat generating module 150 may serve as a reinforcing material to impart rigidity to the blade 110 by being disposed on the inner wall or the outer wall of the blade 110.

In the present embodiment, although the heating module 150 is shown coupled to the outer wall of the blade 110, the heating module 150 may be coupled to the inner wall of the blade 110, which will be described later.

The heating module 150 as an arc heating plate is coupled to the front end region of the blade 110. That is, as shown in FIG. 3, the heating module 150 may be coupled to the front end region of the blade 110 by bonding (B).

Of course, unlike the drawing, the heating module 150 may be provided at a place other than the front end region of the blade 110. However, given that the location where the ice in the blade 110 can freeze the most and most easily is the front end area of the blade 110, it may be desirable to place the heating module 150 in this area.

As described above, the outside temperature sensing module 130 is coupled to the heating module 150, where the outside temperature sensing module 130 may be disposed along a virtual center line of the heating module 150. Only then can they be more reliable in measuring the natural frequency of the fluid.

In addition, the number of outside temperature sensing modules 130 may be determined according to the size of the heating module 150. Therefore, in the drawing of the present embodiment, two air temperature sensing modules 130 are provided in the heating module 150, but the scope of the present invention is not limited to these drawings.

Since the outside temperature sensing module 130 is coupled to the heating module 150, the outside temperature sensing module 130 is coupled to the heating module 150 to be exposed to the outside of the heating module 150.

To this end, the heating module 150 is provided with a module accommodating part 151 in which the outside air temperature sensing module 130 is partially accommodated, and the module accommodating part 151 is provided with a module accommodating part ( A gripper 152 is provided that grips at 151.

Although the gripper 152 is illustrated in the drawing in brief, the gripper 152 may be various, such as a bolt type or a hook type.

Finally, the controller 170 controls whether a current is supplied to the heating module 150 based on the outside temperature information detected by the outside temperature sensing module 130.

The controller 170 will be described with reference to FIG. 5. As described above, the controller 170 determines whether the current is supplied to the heating module 150 based on the ambient temperature information sensed by the outside temperature sensing module 130, that is, the heating module 150 through the current supply unit 140. Controls whether current is supplied, time, or its strength. For reference, as shown in FIG. 5, the current supply unit 140 is connected to the heat generating module 150 to supply current to the heat generating module 150. The current supply unit 140 may be connected to the nacelle.

The controller 170 performing this role may include a central processing unit 171 (CPU), a memory 172 (MEMORY), and a support circuit 173 (SUPPORT CIRCUIT).

The central processing unit 171 is a computer processor that can be industrially applied to control the current supply to the heating module 150 based on the outside temperature information sensed by the outside temperature sensing module 130 in the wind generator of the present embodiment It may be one of them. The memory 172 (MEMORY) is connected to the central processing unit 171. The memory 172 may be a computer-readable recording medium and may be located locally or remotely and may be any of various types of storage devices, including, for example, random access memory (RAM), ROM, floppy disk, hard disk, At least one or more memories. The support circuit 173 (SUPPORT CIRCUIT) is coupled with the central processing unit 171 to support the typical operation of the processor. Such a support circuit 173 may include a cache, a power supply, a clock circuit, an input / output circuit, a subsystem, and the like.

In the wind power generator according to the present embodiment, a series of processes for controlling whether or not a current is supplied to the heating module 150 based on the outside temperature information detected by the outside temperature sensing module 130 may be stored in the memory 172. . Typically, a software routine may be stored in memory 172. The software routines may also be stored or executed by other central processing units (not shown).

Although processes according to the present invention are described as being performed by software routines, it is also possible that at least some of the processes of the present invention may be performed by hardware. As such, the processes of the present invention may be implemented in software executed on a computer system, or in hardware such as an integrated circuit, or in combination of software and hardware.

Referring to the operation of the wind power generator of the present embodiment described above are as follows.

As described above, the heating module 150 provided with the outside temperature sensing module 130 is an additive mounted to the blade 110 for de-icing or anti-icing the blade 110. In certain situations in which ice may be generated, current is flowed to the heating module 150 as a resistor to generate heat to remove ice or prevent ice generation.

First, when the temperature of the outside air is lowered and ice starts to be generated, the fluid of the outside temperature sensing module 130 changes its natural frequency, and thus detects whether ice is generated by detecting that the natural frequency of the fluid is changed. do.

For example, based on the mass and stiffness of the fluid initially set, the reference frequency (frequency) can be determined to determine whether ice is produced, and after confirming whether ice is generated by identifying the frequency changed from the reference frequency when ice is formed according to temperature By sending a signal to the controller 170, the controller 170 allows a current to be supplied to the heating module 150 through the current supply unit 140.

When such an operation proceeds, the heating module 150 coupled to the blade 110 generates heat due to its characteristics, and thus ice can be safely removed by controlling the amount of heat generated based on the current supply time or the intensity.

If the frequency change of the fluid of the outside air temperature sensing module 130 is well utilized, an anti-icing function may be configured to prevent ice generation in a specific situation.

As described above, according to the present embodiment, as in the prior art, it is possible to fundamentally prevent the occurrence of a risk factor such as falling of an attachment or ice, and it is possible to check the icing of the blade 110 with a simple and accurate accuracy to efficiently make ice or ice. It can be done.

In other words, according to this embodiment, it is possible to effectively prevent the occurrence of the icing (icing) phenomenon in the blade 110, thereby preventing the safety accident due to the falling ice, the aerodynamic force of the blade 110 It is possible to prevent the deterioration of the characteristics as well as to prevent the phenomenon that the vibration occurs in the blade (110).

6 is a schematic partial cross-sectional structural view of the heat generating module region in the wind power generator according to the second embodiment of the present invention.

In the above-described embodiment, the heating module 150 is disposed on the outer wall of the blade 110, the outside temperature sensing module 130 is coupled to the heating module 150 to be exposed to the heating module 150.

However, as shown in FIG. 6, the heating module 250 may be disposed on the inner wall 210a of the blade 210, and the outside temperature sensing module 230 may be coupled to the heating module 250 to be embedded in the heating module 250. It may be.

In this case, in order for the outside temperature sensing module 230 to detect the temperature of the outside air well, a plurality of slits S are formed in both the blade 210 and the heating module 250 in the area where the outside temperature sensing module 230 is located. Preferably, in this case, the outside air may directly contact the outside air temperature sensing module 230 through the slits S to detect the correct outside air temperature.

Even if the structure shown in FIG. 6 is applied, it is possible to effectively prevent the occurrence of the icing (icing) phenomenon in the blade 210, thereby preventing the safety accident due to the falling ice, the aerodynamic of the blade 210 It is possible to prevent the deterioration of the characteristics, as well as to prevent the phenomenon that the vibration generated in the blade (210).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

101: hub 103: nacelle cover
110: blade 120: tower
130: outside temperature sensing module 131: module housing
140: current supply unit 150: heat generating module
170: controller

Claims (11)

Is disposed on one side of the blade (blade) is rotated by the wind, the outside air temperature sensing module for detecting the outside temperature at the location;
A heat generating module detachably coupled to the blade and configured to prevent an icing phenomenon from occurring on the blade while being heated when a current is supplied; And
And a controller for controlling whether a current is supplied to the heating module based on the outside temperature information detected by the outside temperature sensing module. The method of claim 1,
The outdoor air temperature sensing module detects the outdoor air temperature on the basis of the characteristic that the natural frequency of the fluid is changed according to the temperature condition of the outdoor air. 3. The method of claim 2,
The outside air temperature sensing module comprises a module housing filled with a fluid whose natural frequency is changed in accordance with the temperature conditions of the outside air. The method of claim 1,
The heating module is a wind power generator is an arc (heat) plate having a curvature corresponding to the curvature of the blade. 5. The method of claim 4,
And the arc-type heat generating plate is coupled to the front end region of the blade. The method of claim 1,
The outdoor air temperature sensing module is coupled to the heat generating module. The method according to claim 6,
The outside air temperature sensing module is disposed along the virtual center line of the heat generating module. The method according to claim 6,
The outdoor air temperature sensing module is coupled to the heat generating module exposed to the outside of the heat generating module. 9. The method of claim 8,
The heat generating module further includes a module accommodating part in which the outside temperature sensing module is partially accommodated.
And a gripper configured to grip the outside air temperature sensing module at the module accommodating part. The method according to claim 6,
The outside temperature sensing module is coupled to the heating module to be embedded in the heating module,
And a plurality of slits formed in an area in which the outside temperature sensing module is located in the heat generating module. The method of claim 1,
The heating module is disposed on the inner wall or outer wall of the blade,
A current supply unit connected to the heat generating module and supplying current to the heat generating module,
The controller is a wind turbine for controlling the current supply, the time or the intensity of the current supply to the heating module through the current supply.

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