KR101540442B1 - Wind power generator - Google Patents

Abstract

A wind turbine employing a cooling / heating structure is provided. The wind turbine generator includes a rotor that rotates by receiving wind, a generator that generates electric power by the rotational force of the rotor coupled to the rotor, a Nacelle section that receives the generator, a tower section that supports the nacelle section, A main bus bar arranged in one of a plurality of layers of the tower part, a plurality of branch bus bars branched from the main bus bar and extending in a direction different from the main bus bar, a main bus bar and a branch bus bar, A plurality of electric power unit parts in which an area is exposed to the inside of the tower part, and at least one ventilation hole formed through a part of the outer wall of the tower part.

Description

{Wind power generator}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wind power generator, which is a power generation facility for generating electric energy using wind, and more particularly, to a wind power generator that employs an effective cooling / heating structure suitable for a wind power generation system.

Electric energy can be obtained by converting various kinds of energy existing in nature into various ways. A power generator or a power generation facility is a facility that obtains electrical energy through mechanical and physicochemical energy conversion processes related to the motion process of the object and the state change. It is possible to easily drive or operate it.

Conventionally, power generation facilities using power generation methods such as thermal power generation and nuclear power generation have become mainstream. These power generation facilities are suitable for mass production of electric energy, but also have problems such as generation of excessive air pollutant due to fossil fuel combustion or emission of radioactive waste which is difficult to process. Therefore, in order to solve this problem and to prevent environmental pollution, other natural environment-friendly development methods are attracting attention.

Wind power, which generates electric energy using wind, is a typical example of such a natural-friendly power generation method. Wind power generators or wind power generators are currently installed in various regions. In addition, wind power generation facilities using winds can function as optimal power generation facilities in regions where wind flow is large, such as marine or polar regions.

The wind power generation facility includes a rotor (rotor) to which a rotary wing is coupled as disclosed in Korean Patent Laid-Open No. 10-2001-0093793, and is connected to an engine room (Nacelle) . Inside the engine room to which the train is connected, various kinds of equipment including a power generation turbine and a power conversion device for converting the produced power into a usable state are accommodated.

However, since the conventional wind turbines are concentrated in a relatively small space, it is difficult to effectively solve the heat generated by the various devices involved in the power generation process. In addition, when a separate cooling device is additionally provided to solve such a problem, there arises a problem that the parasitic power increases and the power generation efficiency of the facility is rather reduced.

Korean Patent Publication No. 10-2001-0093793, (October 29, 2001)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wind turbine generator which improves power generation efficiency by employing an effective cooling / heating structure suitable for a wind turbine generator.

The technical problem of the present invention is not limited to the above-mentioned problems, and another technical problem which is not mentioned can be clearly understood by those skilled in the art from the following description.

A wind turbine according to the present invention includes: a rotor rotating by wind; A generator that is axially coupled to the rotor and generates electric power by a rotational force of the rotor; A Nacelle unit for receiving the generator; A tower portion supporting the nacelle portion and having an inner portion divided into a plurality of layers; A main bus bar arranged on any one of the plurality of layers of the tower portion; A plurality of branch bus bars branched from the main bus bar and extending in a direction different from the main bus bar; A plurality of power source units connected to at least one of the main bus bar and the branch bus bar and having a heat generating region exposed inside the tower unit; And at least one vent hole formed through a part of an outer wall of the tower portion.

The main bus bar may include a first flow path through which deionized water circulates, and the branch bus bar may include a second flow path communicating with the first flow path and circulating the deionized water.

The main bus and the branch bus bar may be at least partially overlapped and coupled to each other, and the first flow path and the second flow path may be connected through the overlapping surface of the main bus bar and the branch bus bar.

Either one of the first flow path and the second flow path may protrude and be inserted into the other one.

The wind power generator may further include a bolt portion passing through any one of the main bus bar and the branch bus bar and being coupled to the other one to closely contact the main bus bar and the branch bus bar.

At least one pair of the ventilation holes are formed so as to oppose each other with the plurality of power units therebetween. One of the pair of the ventilation holes is provided with an intake fan for introducing outside air into the inside thereof, An exhaust fan can be installed.

Wherein the tower portion includes an interlayer separating member which is divided into the plurality of layers and in which a plurality of vents through which air passes are formed, and the intake fan and the exhaust fan may be located in different layers, respectively, with the interlayer separating member interposed therebetween .

According to the present invention, it is possible to easily solve the heat generation of various equipments involved in driving the generator with an effective cooling / heating structure. Accordingly, it is possible to obtain a beneficial effect of increasing the power generation efficiency of the generator and supplying power more smoothly than in the past.

1 is an enlarged perspective view of a wind turbine generator according to an embodiment of the present invention.
2 is a plan view showing the inside of a tower portion of the wind power generator of FIG.
FIG. 3 is an exploded perspective view of a main bus bar and a branch bus bar arranged inside the tower portion of FIG. 2;
FIG. 4 is a cross-sectional view illustrating the main bus bar and the branch bus bar in FIG. 3;
5 is an operation diagram showing a cooling process by circulation of deionized water.
Figs. 6 and 7 are operation diagrams showing a cooling process by air.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and methods for accomplishing the same will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the present invention is only defined by the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a wind turbine generator according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. FIG.

FIG. 1 is an enlarged perspective view of a wind turbine according to an embodiment of the present invention, and FIG. 2 is a plan view illustrating the inside of a tower of the wind turbine of FIG. 1.

Referring to FIG. 1, a wind turbine generator 1 according to the present invention includes a rotor 10 rotated by wind, a nacelle 20 rotatably coupled to the rotor 10, a nacelle 20 And a tower portion 30 having an inner portion divided into a plurality of layers. In the nacelle 20, a generator 220, which is axially coupled to the rotor 10 and generates electricity by the rotational force of the rotor 10, is accommodated.

On the other hand, the tower portion 30 supporting the nacelle portion 20 is provided with a main bus bar 330 arranged in one of a plurality of layers in the tower portion 30 and a main bus bar 330 branched from the main bus bar 330 A plurality of branch bus bars 340, a main bus bar 330 and a branch bus bar 340 extending in a direction different from the main bus bar 330 and connected to at least one of the main bus bar 330 and the branch bus bar 340, A plurality of power source units 400 exposed inside the tower unit 30 and at least one ventilation hole 310 formed through a part of the outer wall of the tower unit 30 are formed.

That is, the wind turbine generator 1 according to an embodiment of the present invention can use various types of power supply units 400 using the main bus bar 330 and the branch bus bar 340 in a whole of the inside of the tower unit 30 The air flow around the wind power generator 1 is guided to the tower portion 30 by the ventilation hole 310 formed through the outer wall of the tower portion 30 so that the heat generation region is directly exposed to the inner space of the tower portion 30, (30). Therefore, it is possible to form an effective cooling / heating structure that positively uses the geographical condition of the wind turbine 1, which is dried in a region where the amount of wind is relatively large and strong wind flows.

The main bus bar 330 and the branch bus bar 340 are formed so as to be freely separated from each other so that the power terminal unit 400 can be easily dispersed and disposed therein. To form a cooling / heating structure that simultaneously utilizes an air-cooling type and a water-cooling type. As a result, it is possible to solve the heat generation of various equipments involved in the electric power production and greatly improve the electric power production efficiency. Hereinafter, with reference to Figs. 1 and 2, each component of the wind turbine 1 having such characteristics will be described in more detail.

The rotor 10 is shaft-coupled to the generator 220 accommodated in the nacelle 20, and may have a rotary blade at one side thereof. The rotor 10 converts the kinetic energy of the wind passing through the rotary vane to rotational force and transmits it to the generator 220. The rotor 10 may be formed to rotate about a vertical axis or a horizontal axis, whereby the shape of the rotary vane may be deformed. Thus, the shape shown is illustrative, and the shape of the rotor 10 need not be limited to this shape.

The generator 220 is axially coupled to the rotor 10 to generate electricity by the rotational force of the rotor 10. [ The generator 220 may be configured to convert the rotational force of the rotor 10 into an electric force, including a pair of armatures and fields that rotate relatively about an axis in the interior. The generator 220 can be connected to the rotor 10 via the gear box 210 and can maintain an appropriate rotation ratio in response to acceleration and deceleration of the rotor 10. The generator 220 is accommodated in the nacelle 20 as one component of the wind turbine 1 including the rotor 10, the tower 30, and the nacelle 20, and the like.

The nacelle 20 serves as a housing for accommodating the generator 220, the gear box 210, and a brake device (not shown) or other power conversion devices, Respectively. The shape of the nacelle 20 is not limited as shown in the drawings, and may be appropriately modified in consideration of the shape of the rotor 10, the rotary vane, the shape of the tower 30, and the like.

The tower portion 30 supports the nacelle 20 and has a plurality of layers therein. 1, the tower portion 30 is extended upwardly from the installation surface on which the wind turbine generator 1 is installed, and the turbine 30 is installed around the wind turbine generator 1, particularly, around the tower portion 30 and the tower portion 30 It is possible to cause a strong wind sufficient to generate power to pass around the rotor 10 located at the uppermost stage. The width or height of the tower portion 30 or the internal structure thereof can be appropriately changed in consideration of the terrain of the area where the wind turbine generator 1 is installed, the condition of the installation surface, the average wind speed of the area, and the like.

The interior of the tower portion 30 is divided into a plurality of layers with the interlayer separating member 320 interposed therebetween as shown in FIG. 1 and 2, a main bus bar 330 is arranged so as to cross one of the plurality of layers, and a plurality of branch bus bars 340 branch back from the main bus bar 330 and extend in the other direction. The power supply unit 400 is connected to at least one of the main bus bar 330 and the branch bus bar 340 arranged in this manner and is dispersedly disposed in the tower unit 30 as shown in the respective figures. At this time, the layer in which the main bus bar 330, the branch bus bar 340, and the power terminal portion 400 are disposed may be any layer inside the tower portion 30, But is not limited to.

The power supply unit 400 may include, for example, a plurality of capacitors in the form of banks, transistors, transistors, as well as reactors and various other electronic equipment and power networks, Or a converter that keeps the output constant. The plurality of power source units 400 are dispersed as shown in FIG. 2, and each heat generating region is exposed to the inside of the tower unit 30.

Accordingly, the heat generated from the power source unit 400 at the time of power generation can be easily dispersed to the inside of the tower unit 30 and can be instantaneously canceled by the wind introduced through the ventilation hole 310. In addition, since the unreacted heat is transferred along the main bus bar 330 and the branch bus bar 340 through the deionized water circulation process described later, the inside of the tower portion 30 can always be maintained at an appropriate temperature or lower . As a result, the apparatus can be easily operated at the time of power generation, and the power production efficiency is greatly increased. The deionized water is easily introduced into the main bus bar 330 and the branch bus bar 340 through the piping 332 connected to the main bus bar 330 and the pump 333 connected to one side of the piping 332 It is recyclable. This will be described in more detail below.

The ventilation hole 310 is formed through the outer wall of the tower portion 30. At least one ventilation hole 310 may be formed along the outer wall of the tower portion 30. Preferably, at least one pair of the ventilation holes 310 may be formed facing each other with a plurality of power source units 400 interposed therebetween. At this time, each of the pair of ventilation holes 310 is provided with a fan 311 functioning as an intake fan (see 311a in FIG. 6) and an exhaust fan (see 311b of FIG. 6) An active cooling process can be performed in which the inflowing internal air flows out to the outside. This will be described later in more detail.

Hereinafter, the structure of the main bus bar and the branch bus bar will be described in more detail with reference to FIGS. 3 and 4. FIG.

FIG. 3 is an exploded perspective view of a main bus bar and a branch bus bar arranged in the tower portion of FIG. 2, and FIG. 4 is a cross-sectional view illustrating a main bus bar and a branch bus bar of FIG.

The main bus bar 330 and the branch bus bar 340 are arranged in different directions as described above and disposed in the tower portion (see 30 in FIG. 2), and the main bus bar 330 and the branch bus bar 340 ) So that electrical signals can be exchanged between a plurality of power source units (see 400 in Fig. 2). For this purpose, the main bus bar 330 and the branch bus bar 340 may be made of a metal material capable of conducting electricity, but the present invention is not limited thereto. The branch bus bar 330 and the main bus bar 340 may be formed of various materials, (340) can be formed.

Meanwhile, the main bus bar 330 and the branch bus bar 340 circulate deionized water to prevent short-circuiting or electric shock of an external user, while using deionized water as a refrigerant, Heat exchange can be performed. A first flow path 331 extending through the main bus bar 330 in the longitudinal direction may be formed on the inner side of the main bus bar 330 and a branch bus bar 340) is formed in the second flow path (341) so as to circulate the deionized water.

The deionized water may be generated by, for example, coupling an ion removing device or the like to one side of the piping (see 332 in FIG. 2) described above, and the dissolved ion is removed to maintain the electrical conductivity at an extremely low level Lt; / RTI > The deionized water can be injected into the first flow path 331 of the main bus bar 330 through the piping 332.

The first flow path 331 may extend to the inside of the main bus bar 330 and may include a protrusion 331a protruding from the surface of the main bus bar 330 as shown in FIGS. The second flow path 341 may include a depressed portion 341a formed by inserting the surface of the branch bus bar 340 inward on a surface of the main bus bar 330 facing the protruding portion 331a. 4, when the protrusion 331a is inserted into the recess 341a, part of the main bus bar 330 and the branch bus bar 340 are overlapped with each other to form an overlapping surface, The first flow path 331 and the second flow path 341 are connected to each other. In this case, the overlapping surface may be the surface of the main bus bar 330 and the branch bus bar 340 where the protrusions 331a and the depressions 341a are located.

With this structure, the main bus bar 330 and the branch bus bar 340 can be separated / combined with each other and freely change the arrangement state thereof. Therefore, a plurality of power source units 400, which are different from each other, can be easily dispersed and arranged in consideration of the shape of the tower (see FIG. 2) and the size of the space formed inside the tower 30. The overlapping surfaces formed with the protrusions 331a and the depressions 341a may be formed to be stepped and engaged with each other so that the coupling between the main bus bar 330 and the branch bus bar 340 can be secured . However, the present invention is not limited to this, and the combination of the main bus bar 330 and the branch bus bar 340 may be modified in various ways as needed.

When the main bus bar 330 and the branch bus bar 340 are coupled to each other, the first flow path 331 and the second flow path 341 communicate with each other as shown in FIG. Therefore, the deionized water can circulate easily and heat-exchange inside the main bus bar 330 and the branch bus bar 340. The watertightness member 342 is coupled between the main bus bar 330 and the branch bus bar 340 and between the protrusion 331a and the indentation 341a as shown in the figure, Can be prevented.

The shape of the protrusion 331a and the shape of the indentation 341a and the shape of the watertight member 342 can easily connect the first flow path 331 and the second flow path 341 to each other to prevent leakage of deionized water But may be formed in various ways without limitation. That is, for example, the main bus bar 330 and the branch bus bar 340 can be more easily formed in a manner such that at least one of the projecting portion 331a and the depressed portion 341a is elastically deformable, ). ≪ / RTI >

The bolt portion 350 passes through one of the main bus bar 330 and the branch bus bar 340 and is coupled to the other. That is, as shown in FIGS. 3 and 4, the bolt portion 350 is inserted into the main bus bar 330 and the branch bus bar 340 so that the main bus bar 330 and the branch bus bar 340 are in close contact with each other, So that there is no leakage between the first flow path 331 and the second flow path 341. When the main bus bar 330 and the branch bus bar 340 are closely contacted with each other by the bolt part 350 and the watertight member 342 is pressed and the gap between the protruding part 331a and the indentation part 341a is It can be completely watertight. As a result, the deionized water circulates between the first flow path 331 and the second flow path 341 more smoothly without leakage.

Meanwhile, the first flow path 331 may be formed parallel to each other as shown by a pair of an inlet side to which deionized water is injected and a discharge side to be discharged. Any one of them (for example, the first flow path on the injection side) may be distributed along the connection path 331b and connected to one of the adjacent protrusions 331a, and the other one May be distributed by another connection path 331b and may be connected to another one of the adjacent protrusions 331a. The protrusions 331a adjacent to each other can be connected to the first flow path 331 corresponding to the injection side and the discharge side, respectively.

As shown in the drawing, the second flow path 341 may be formed in parallel with a pair of the inlet side and the outlet side, and one of the adjacent recessed portions 341a may be formed with a second flow path 341 corresponding to the injection side, And the other one may be connected to the second flow path 341 corresponding to the discharge side.

Therefore, the projecting portion 331a and the indent portion 341a can be connected to each other by dividing the injection side and the discharge side of the first flow path 331 and the second flow path 341, respectively. Thereby deionized water is injected to the ends of the main bus bar 330 and the branch bus bar 340 along the injection side of the first flow path 331 and the second flow path 341, The deionized water circulating process is easily performed.

5 is an operation diagram showing a cooling process by circulation of deionized water.

The circulation and cooling process of deionized water will be described in more detail with reference to FIG. The deionized water can be injected from the piping section 332 extending to the outside of the main bus bar 330 and the branch bus bar 340 and the pump 333 is connected to the piping section 332 as described above, Ionized water can be easily injected into the main bus bar 330. Although not shown, the ion removing device may be provided on one side of the pipe portion 332 as described above.

The injected deionized water moves along a first flow path (see 331 in FIG. 3) inside the main bus bar 330 and again flows to different branch bus bars 340 along the second flow path (see 341 in FIG. 3) (See a solid line arrow). The number of the branch bus bars 340 can be increased or decreased according to the number of the power source units 400, and the arrangement state can be easily changed by a detachment method. The main bus bar 330 and the branch bus bar 340 can be easily coupled through the structure described above and can secure the connection between the first flow path 331 and the second flow path 341, It can be easily injected corresponding to the arrangement state of the bus bar 340.

The injected deionized water is heat-exchanged with the power supply unit 400 connected to at least one of the main bus bar 330 and the branch bus bar 340, absorbs heat, and is recovered while the temperature is raised. During the recovery process, the deionized water can move to the piping 332 via the second flow path 341 and the first flow path 331 (see the dotted arrow). This completes the cycle process.

The circulation process is a water-cooling circulation process using deionized water as a refrigerant. The circulation process is a process of circulating the bottom of the tower unit 30 (interlayer separator 320), which is relatively less exposed to the flow of air flowing inside the tower unit 30, May be the bottom surface on which the < / RTI >

 Figs. 6 and 7 are operation diagrams showing a cooling process by the wind.

At the same time as the deionized water circulation, air flows in and out of the tower 30, so that the cooling / heating process by the air proceeds. Referring to FIG. 6, at least one pair of ventilation holes 310 may be formed to face each other with a plurality of power source units 400 therebetween, through the outer wall of the tower unit 30.

At this time, one of the ventilation holes 310 is provided with an air intake fan 311a for introducing outside air into the inside of the tower 30, and the other is provided with an exhaust fan 311b for discharging the inside air to the outside. Therefore, the air flow around the tower portion 30 can be actively guided to the inside of the tower portion 30. The air introduced into the tower 30 continuously contacts the plurality of power units 400, the main bus bar 330 and the branch bus bar 340 and is particularly exposed to the inside of the tower unit 30 It is possible to effectively cool the heat generating portion of the power supply unit 400. [

Such a cooling method is a cooling method particularly suitable for a wind power generator (see 1 in FIG. 1) installed in an environment in which the amount of wind is large and the strength thereof is high. In addition, when the wind direction is changed through a plurality of different ventilation holes 310, the flow direction of the air can be adjusted correspondingly and the temperature inside the tower portion 30 can be effectively maintained.

At this time, the suction fan 311 and the exhaust fan 311 are used to distinguish between the fan 311 installed on the air inlet side and the fan 311 installed on the outlet side, and need not be limitedly interpreted. That is, when the direction of the wind changes, the rotation direction or the alignment direction of the fan 311 can be changed correspondingly, and the side on which the air is introduced functions as the suction fan 311, The pair of fans 311 are opposed to each other so as to function as the fan 311.

7, the tower portion 30 is divided into a plurality of layers by the interlayer separating member 320 as described above, and the plurality of ventilation holes 321 may be formed in the interlayer separating member 320 have. In addition, the intake fan 311 and the exhaust fan can be located on different layers, respectively, as shown, with the interlayer separating member 320 interposed therebetween.

In this case, air introduced through the suction fan 311 is discharged through the air vent 321 and between the interlayer separating members 320. That is, since the inflow air flows through the main bus bar 330 and the interlayer separating member 320 where the branch bus bar 340 is located, the main bus bar 330 and the branch bus bar 340 can also be cooled more easily. In this case, the interlayer separating member 320 may refer to a bottom surface or a ceiling surface forming one layer of the tower unit 30, and the air introduced through the interlayer separating member 320, It can easily flow to another layer.

Preferably, the intake fan 311 is located in the lower layer with the interlayer separating member 320 therebetween, and the exhaust fan 311 can be located in the higher layer with the interlayer separating member 320 therebetween. As a result, after the low-temperature outside air is introduced, the heat is exchanged to rise to the higher layer, and the process of discharging to the exhaust fan 311 can naturally proceed.

The cooling system can easily cool the heat generated from various devices or electronic equipments during the power generation of the wind turbine generator 1, thereby greatly increasing the power production efficiency of the wind turbine generator 1.

1: Wind generator 10: Rotor
20: Nacelle 210: Gear box
220: generator 30: tower part
310: Ventilation hole 311: Fan
311a: intake fan 311b: exhaust fan
320: interlayer separating member 321: ventilation hole
330: Main bus bar 331: First bus
331a: protrusion 331b: connection path
332: piping section 333: pump
340: Branch bus bar 341: Second bus
341a: indentation portion 342: watertight member
350: bolt part 400: electric power part

Claims (7)

A rotor rotating in the wind;
A generator that is axially coupled to the rotor and generates electric power by a rotational force of the rotor;
A Nacelle unit for receiving the generator;
A tower portion supporting the nacelle portion and having an inner portion divided into a plurality of layers;
A main bus bar arranged on any one of the plurality of layers of the tower portion;
A plurality of branch bus bars branched from the main bus bar and extending in a direction different from the main bus bar;
A first flow path included in the main bus bar and allowing deionized water to circulate therein;
A second flow path which is contained in the branch bus bar and communicates with the first flow path to allow the deionized water to circulate;
A plurality of power devices connected to at least one of the main bus bar and the branch bus bar; And
And at least one vent hole formed through a part of an outer wall of the tower portion,
Wherein the main bus and the branch bus bar are at least partially overlapped and coupled, and the first flow path and the second flow path are connected through the overlapping surface of the main bus bar and the branch bus bar. delete delete The wind turbine generator according to claim 1, wherein one of the first flow path and the second flow path is inserted into the other of the first and second flow paths. The wind turbine generator according to claim 1, further comprising a bolt portion passing through any one of the main bus bar and the branch bus bar and coupled to the remaining one of the main bus bar and the branch bus bar, 2. The air conditioner according to claim 1, wherein at least one pair of the ventilation holes are formed so as to face each other with the plurality of power source units therebetween,
Wherein one of the pair of air vents is provided with an air intake fan for introducing outside air into the inside thereof and an exhaust fan for discharging the inside air to the outside. 7. The air conditioner according to claim 6, wherein the tower portion includes an interlayer separating member which is divided into the plurality of layers and in which a plurality of vents through which air passes are formed,
Wherein the intake fan and the exhaust fan are located on different layers with the interlayer separating member interposed therebetween.

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