KR20140054942A - Floating offshore wind power generation plant - Google Patents

Abstract

The present invention relates to a floating offshore wind power generating apparatus capable of generating electricity using wind power by being installed in a shallow sea. The floating offshore wind power generating apparatus comprises: a blade rotated by wind; a nacelle which has wind power generating equipment generating power by rotating the blade; an upper tower for mounting the nacelle on the top thereof; a lower structure floating on the sea by supporting the weight of the upper tower, the nacelle, and the blade installed on the top using buoyancy; a connecting structure fixing and connecting the lower structure and the upper tower; multiple auxiliary floating bodies which are fixed and installed on a side surface of the lower structure and which support the weight of the upper tower, the nacelle, and the blade using buoyancy by assisting the lower structure; and a mooring line which moors the auxiliary floating body and the lower structure by connecting and fastening the lower structure or the auxiliary floating body with the seabed. The floating offshore wind power generating apparatus can be installed in the shallow sea, have an excellent operating condition by generating power near land, and reduce electricity loss when the generated electricity is transported.

Description

[0001] FLOATING OFFSHORE WIND POWER GENERATION PLANT [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating offshore wind power generation facility, and more particularly, to a floating offshore wind power generation facility capable of generating electricity using wind power even in coastal waters.

Generally, wind power generation facilities are mainly installed only on the land, but the wind quality is generally good as compared with the land, and the blade noise problem can be easily addressed. As a result, the marine installation is gradually increasing.

The structure for installing wind power generation facilities on the sea can be divided into a fixed type and a floating type. The fixed type structure is a type in which the structure is directly fixed to the sea floor as in the land, and the environmental load is corresponding to the structural deformation. Floating, buoyancy, buoyancy, environmental load and mooring force, and it is a way to overcome the environmental load by 6 degree of freedom movement of the structure.

However, the stationary offshore wind power plant is fixed on the sea floor and provides favorable operating conditions. However, even if the depth of water is slightly increased, the structure becomes too large and the risk of fatigue failure is difficult to avoid. And the installation cost is too much. Therefore, there is a lot of research on the offshore wind power generation facility using the floating type which is not limited by the water depth.

On the other hand, Korean Patent Laid-Open No. 10-2012-0021238 discloses a marine floating wind power generator having a floating supporting line compression structure. According to the disclosed technology, there is provided a marine floating wind power generation apparatus having a wind power generator, comprising: a vertical support for installing the wind power generator on an upper portion thereof; A lower end fixed plate installed below the vertical floating structure, and a lower end fixed plate installed at a lower portion of the vertical floating structure so as to connect the upper end fixed plate with the sea floor in a diagonal line A center cable having a plurality of floating support lines connected to a collecting base at one end thereof and the other end fixed to a bottom surface of the lower side of the vertical floating structure and having one end connected to the upper end fixing plate and the other end connected to a lower end fixed plate Which is connected to a collecting table provided on the lower side and which has the same number as the number of the floating supporting lines A connecting means for connecting each of the floating support lines and each of the reverse osculating cables corresponding to the respective floating support lines to refract each of the reverse osculating cables outwardly; And a controller for controlling the height adjusting means in response to the level signal of the water level gauge. Accordingly, it is possible to provide a stable float center even in a strong wave or wind applied to the power generation facility The height of the wind power generator can be actively reduced in the typhoon condition accompanied by the strong wind speed during the change of the water level of the sea level by the height adjustment and maintenance of the wind power generator.

Conventional floating offshore wind power generation facilities as described above can be installed only in a deep sea of 200 m or more in depth since a conventional lower structure has a length of about 100 m, ) In the low water depth (that is, the shallow sea). In addition, since the conventional floating offshore wind power generation equipment generates electric power far from the land, the operation condition is not good, and there is a disadvantage that power loss is large when the produced electric power is transported.

Korean Patent Publication No. 10-2012-0021238

An embodiment of the present invention is to provide a floating offshore wind power generation facility in which a lower structure in a floating offshore wind power generation apparatus is implemented as a spar type that can be installed even in a sea of ice.

Among the embodiments, the floating offshore wind power generation facility is a floating offshore wind power generation facility including a wind-driven blade, a nose cell having a wind turbine generating power by rotation of the blade, and an upper tower for mounting a nose- A wind turbine power plant, comprising: a lower structure for supporting a weight of an upper tower, a nacelle and a blade installed at an upper end thereof by buoyancy to float on the sea; A connection structure for fixedly connecting the upper tower and the lower structure; A plurality of auxiliary buoyancy members fixed to the side surfaces of the lower structure and supporting the lower structure to support the upper tower, the nacelle and the weight of the buoyancy by buoyancy; And a mooring line for mooring the lower structure and the auxiliary buoyant body by connecting the lower structure or the auxiliary buoyant body to the sea floor.

In one embodiment, the lower structure may include fixing means for fixing the auxiliary buoyant body to the side surface.

In one embodiment, the lower structure may be formed by fixing the auxiliary buoyant body to the side surface by welding or integrated with the auxiliary buoyant body.

In one embodiment, the connection structure may have the upper tower fixed to the upper portion and the lower structure and the auxiliary buoyant body fixed to the lower portion.

In one embodiment, the auxiliary buoyant body is mounted with a ballast for centering the gravity at the bottom of the center of the buoyancy at the lower end portion, and may be fixedly installed in a bundle shape on the side of the lower structure.

In one embodiment, the auxiliary buoyant body has a plurality of connecting means for connecting the auxiliary buoyant bodies to each other, Each of the connecting means may be composed of two fixed bodies fixed to the sides of two auxiliary buoyant bodies connected to each other and a connecting body fixed between the two fixed bodies to maintain a taut line shape.

In one embodiment, the auxiliary buoyant body may be fixedly mounted on the side surface of the lower structure, and the auxiliary buoyant bodies may be fixedly installed to each other.

In one embodiment, the auxiliary buoyant body may include fixing means for coupling and fixing the auxiliary buoyant bodies to each other at portions where the auxiliary buoyant bodies contact each other.

The floating type offshore wind turbine according to an embodiment of the present invention can be realized as a deformation type sparger which can be installed even in the sea even if the lower structure having a shorter length than the conventional one is installed, It can be installed at sea (that is, in shallow sea) and produces power at a location close to the land so that the operating condition is good, and the loss of electric power is reduced when the produced electric power is transported.

The floating offshore wind power generation system according to an embodiment of the present invention is constructed to have excellent moving performance by a lower structure having a shorter length and a plurality of auxiliary buoyancy structures of the lower structure, It is easy to install and transport.

1 is a block diagram illustrating a floating offshore wind turbine generator according to an embodiment of the present invention.
2 is a plan view for explaining an example of the lower structure and the auxiliary buoyant body in FIG.
Fig. 3 is a plan view for explaining another example of the lower structure and the auxiliary buoyant body in Fig. 1. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

1 is a block diagram illustrating a floating offshore wind turbine generator according to an embodiment of the present invention.

1, a floating offshore wind power generation system according to an embodiment of the present invention includes a blade 110, a nacelle 120, an upper tower 130, a connection structure 140, A plurality of mooring lines 171 and 172, and a plurality of mooring lines 160. The sub structure 150 includes a plurality of mooring lines 171 and 172,

The blade 110 is connected to the nacelle 120 and rotates by a wind (wind), and transmits the rotational force generated by the wind to the wind turbine generator of the nacelle 120 through the rotation shaft.

The nacelle 120 is equipped with a wind turbine and is connected to the blade 110 by a rotating shaft so that the blade 110 rotatably supports the main rotor 120. The main gear box is connected to the rotating shaft of the blade 110, When the rotation shaft of the blade 110 rotates by the wind, the rotation shaft of the rotation shaft is transmitted through the main gear box, and the output shaft of the main gear box rotates to operate the generator, Production.

In one embodiment, the nacelle 120 is coupled to the upper tower 130, and is freely rotatable relative to the upper tower 130, wherein the coupling between the nacelle 120 and the upper tower 130 The direction of the nacelle 120 may be changed according to the direction of the wind by rotating the nacelle 120 in the direction of the wind. That is, the horizontal rotating device may rotate the nacelle 120 horizontally to change the direction of the nacelle 120, thereby rotating the blade 110 connected to the nacelle 120 in the wind direction.

The upper tower 130 is a structure for mounting a nucelle 120 having a wind power generation facility and includes a pillar having a predetermined length for allowing the blade 110 connected to the nacelle 120 to be positioned at a predetermined height from the sea level And is fixed to the lower structure 150.

The upper tower 130 can further include a bearing block that can be installed between the upper tower 130 and the nacelle 120 so that the nacelle 120 can be freely rotated about the upper tower 130 by the bearing block. You can do it.

In one embodiment, the upper tower 130 may be connected and secured to the lower structure 150 via a connection structure 140. Alternatively, the upper tower 130 may be formed integrally with the lower structure 150.

The connection structure 140 is a structure for fixedly connecting the upper tower 130 and the lower structure 150 and fixes the upper tower 130 to the upper structure with respect to the lower structure 150.

In one embodiment, the connection structure 140 includes a lower tower 150 and an auxiliary buoyant 160 fixed to the upper portion of the upper tower 130, And may be fixedly connected to the lower structure 150 and the auxiliary buoyant body 160.

The lower structure 150 is a buoyant body for supporting the blades 110, the nacelle 120 and the upper tower 130 and includes a blade 110, a nacelle 120 and an upper tower 130 It supports the weight by buoyancy and floats on the sea.

In one embodiment, the lower structure 150 may further include fastening means (e.g., fastening means such as bolts, nuts, cables, bands, etc.) for securely securing the auxiliary buoyant body 160 to the sides . Alternatively, the lower structure 150 can be fixed to the side surface of the auxiliary buoyant body 160 by welding. Alternatively, the lower structure 150 may be integrally formed with the auxiliary buoyant body 160 on the side surface.

In one embodiment, the lower structure 150 may be in the form of a vertical cylinder and may be configured to create buoyancy with hollow hollow structures therein, It is also possible to construct a ballast by mounting it.

The lower structure 150 may be fixed to the lower portion of the connection structure 140 and connected to the upper tower 130 through the connection structure 140. [ Alternatively, the substructure 150 may be formed integrally with the upper tower 130.

In one embodiment, the lower structure 150 can be implemented to have a length less than about 20 to 50 (m), which is shorter than the existing substructure.

The auxiliary buoyant body 160 has a length similar to that of the lower structure 150 and is fixed to the side of the lower structure 150 by a plurality of spatially modeled models to assist the lower structure 150, The buoyant body for supporting the nacelle 120 and the upper tower 130 is a buoyant body for supporting the nacelle 120 and the upper tower 130 by buoyantly supporting the weight of the blade 110, It plays a role.

In one embodiment, the auxiliary buoyant body 160 may be constructed such that the length of the lower structure 150 is short, and the blade 110, nose cell 120 and upper tower 130 installed at the upper end are vertically balanced with respect to the sea surface A plurality of bundles may be fixedly installed on the side of the lower structure 150 in order to match the plurality of bundles.

In one embodiment, the auxiliary buoyant body 160 may be in the form of a vertical cylinder and may be configured to generate buoyancy with an empty hollow structure therein, and may also have a gravity center at the bottom of the buoyant center And a ballast for the ball. At this time, the ballast may assist the ballast mounted on the lower end portion of the lower structure 150, and the ballast mounted on the lower end portion of the lower structure 150 may be formed to be gravity center with respect to the entire ballast.

In one embodiment, the auxiliary buoyant body 160 may further include fastening means (e.g., fastening means such as bolts, nuts, cables, bands, etc.) for securely mounting to the sides of the lower structure 150 . Alternatively, the auxiliary buoyant body 160 may be fixed to the side surface of the lower structure 150 by welding. Alternatively, the auxiliary buoyant body 160 may be formed on the side surface of the lower structure 150, integral with the lower structure 150.

In one embodiment, the auxiliary buoyant body 160 may be secured to the lower portion of the connecting structure 140 at its upper portion. Alternatively, the auxiliary buoyant body 160 may be integrally formed with the upper tower 130 together with the lower structure 150.

The mooring lines 171 and 172 are a plurality of mating members for connecting the lower structure 150 and the auxiliary buoyant body 160 to the sea floor in order to moor the lower structure 150 and the auxiliary buoyant body 160 The lower structure 150 and the auxiliary buoyant body 160 are uniformly dispersed and stably moored so that the ends of each end are equally spaced on the side of the lower structure 150 or the auxiliary buoyant body 160 And the other ends are fixedly installed so as to have equal intervals on the sea floor.

In one embodiment, the mooring lines 171 and 172 are wire ropes having rigidity, and may be a structure in which twisted strands are twisted into single or multiple layers. The mooring lines 171 and 172 are provided with an anchor at a lower end portion fixed to the sea bed and the anchor is connected to the lower structure 150 or the auxiliary buoyant body 160 For example, an anchor bolt or the like, or a gravity type structure that sinks by the weight of an anchor or a concrete structure can be applied.

In the floating offshore wind power generation system according to the embodiment of the present invention having the above-described structure, since the existing infrastructure is about 100 m in length, the existing floating offshore wind power generation facility has a water depth of 200 m, The length of the lower structure 150 and the auxiliary buoyant body 160 may be about 20 to 50 m (m) by forming the auxiliary buoyant body 160 on the side surface of the lower structure 150, ), It can be installed not only in the deep sea but also in the deep sea of 50 ~ 100 (m) depth.

The floating offshore wind power generation system according to an embodiment of the present invention having the above-described configuration is constructed by an auxiliary buoyant body 160 formed on the side surface of the lower structure 150, It can be mounted differently in the sea and can have better motion performance than existing floating offshore wind power generation facilities.

In the floating offshore wind power generation system according to an embodiment of the present invention having the above-described configuration, the length of the lower structure 150 coupled with the auxiliary buoyant body 160 is short, and the existing floating offshore wind power generation It is not only easy to install and transport compared to the equipment, but it is also better than the semi-sub type submarine floating offshore wind power generation facility.

In addition, the floating offshore wind turbine generator according to an embodiment of the present invention having the above-described structure can be installed in a sea of deformation, Not only are the operating conditions good, but also the loss of power can be reduced when the produced power is transported.

Fig. 2 is an explanatory view for explaining an example of the lower structure and the auxiliary buoyant body in Fig. 1. Fig.

Referring to FIG. 2, a plurality of auxiliary buoyancy bodies 161, 162, and 163 are coupled and fixed to the side of the lower structure 150, and the auxiliary buoyancy bodies 161, 162, 162, and 163 can be more stably coupled to the lower structure 150 by providing the connecting means 181, 182, and 183 for the auxiliary structures.

The connecting means 181, 182 and 183 are constituted by a connecting body 181 and two fixing bodies 182 and 183 so that the intervals between the auxiliary supporting bodies 161, 162 and 163 are the same So that they have the same length.

The connecting member 181 is a wire for connecting the auxiliary buoyancy members 161, 162 and 163 to each other so that both end portions thereof are fixed to the respective fixing members 182 and 183 to maintain a tight line shape .

In one embodiment, the connector 181 may be a rigid wire rope in which the strands twisted together are twisted into single or multiple strands. Alternatively, the ends 181, May be made of anchor bolts.

The fixing members 182 and 183 are fixed to the side surfaces of the auxiliary buoyant members 161, 162 and 163 and tightly fasten the both ends of the connecting member 181 to tighten the connecting member 181, 161, 162, 163 are connected to each other.

In an embodiment, the fixing bodies 182 and 183 may be formed of anchors coupled to the connecting body 181, and an anchor bolt and an anchor may be coupled between the fixing bodies 182 and 183, 181 < / RTI >

Fig. 3 is an explanatory view for explaining another example of the lower structure and the auxiliary buoyant body in Fig. 1. Fig.

3, a plurality of auxiliary buoyant bodies 261 to 268 are fixedly coupled to the side surface of the lower structure 150, and the auxiliary buoyant bodies 261 to 268 are fixedly connected to each other, So that the auxiliary buoyant members 261 to 268 can be more stably coupled to the lower structure 150.

Each of the auxiliary buoyant bodies 261 to 268 is fixed to each of the auxiliary buoyant bodies 261 to 268 so that the auxiliary buoyant bodies 261 to 268 are fixed to each other by coupling the auxiliary buoyant bodies 261 to 268 to each other. (For example, a fastening means such as a bolt nut, a cable, a band, or the like) for providing a fixed installation.

Alternatively, each of the auxiliary buoyant bodies 261 to 268 may be fixedly coupled to each other by welding between the auxiliary buoyant bodies 261 to 268. Alternatively, each of the auxiliary buoyancy members 261 to 268 may be integrally formed with the lower structure 150 together.

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 present invention as defined by the following claims It can be understood that

110: blade
120: Nacelle
130: Upper tower
140: connection structure
150:
160, 161 to 163, 261 to 268: auxiliary buoyant body
171, 172: Mooring line
181:
182, 183:

Claims (8)

A floating offshore wind turbine installation comprising a blade rotating by wind, a nosel with a wind turbine generator driven by the rotation of the blade, and an upper turbine for mounting the nacelle on top,
An upper structure installed at the upper part to support the weight of the upper tower, the nacelle and the blade by buoyancy to float on the sea;
A connection structure for fixedly connecting the upper tower and the lower structure;
A plurality of auxiliary buoyancy members fixed to the side surfaces of the lower structure and supporting the lower structure to support the upper tower, the nacelle and the weight of the buoyancy by buoyancy; And
And a mooring line for mooring the lower structure and the auxiliary buoyant body by connecting the lower structure or the auxiliary buoyant body to the bottom of the sea.
2. The apparatus of claim 1,
And a fixing means for fixing the auxiliary buoyant body to the side surface of the floating buoyant wind power generator.
2. The apparatus of claim 1,
Wherein the auxiliary buoyant body is fixed to the side surface by welding or is integrally formed with the auxiliary buoyant body.
The connector according to claim 1,
Wherein the upper tower is fixed to the upper portion and the lower structure and the auxiliary buoyant body are fixed to the lower portion.
2. The apparatus of claim 1, wherein the auxiliary buoyant body comprises:
And a ballast for centering gravity at a lower portion of the center of the buoyancy is mounted on a lower portion of the bottom structure, and the ballast is fixed on the side of the lower structure in a bundle shape.
2. The apparatus of claim 1, wherein the auxiliary buoyant body comprises:
A plurality of connecting means for connecting the auxiliary buoyant bodies to each other;
Wherein each of the connecting means comprises two fixed bodies fixed to the side surfaces of two auxiliary buoyant bodies connected to each other and a connecting body fixed between the two fixed bodies to maintain a taut line shape, Power generation facilities.
2. The apparatus of claim 1, wherein the auxiliary buoyant body comprises:
Wherein the auxiliary buoyant bodies are fixedly coupled to the side surface of the lower structure and are fixed to each other.
8. The apparatus of claim 7, wherein the auxiliary buoyant body comprises:
And fixing means for coupling and fixing the auxiliary buoyant bodies to each other at mutual contact portions between the auxiliary buoyant bodies.

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