KR102192116B1 - Spar type wind power generator and its installation and decomission method - Google Patents

Abstract

Provided are a spa type wind turbine with improved installation convenience and an installation method thereof. According to an aspect of the present invention, provided is the spa type wind turbine including: a floating body extended in a longitudinal direction and floating on the sea; a tower extended in the longitudinal direction at the top of the floating body and integrated with the floating body; concrete ballast provided at the bottom of the floating body; and an auxiliary buoyancy body disposed adjacent to the concrete ballast and having a ballast chamber. The spa-type wind turbine of the present invention can integrally manufacture the tower on the floating body to transport and install the tower and the floating body on the sea, thereby reducing installation costs and time.

Description

Spa type wind power generator and its installation and dismantling method {SPAR TYPE WIND POWER GENERATOR AND ITS INSTALLATION AND DECOMISSION METHOD}

The present invention relates to a spa-type wind turbine and a method of installing and dismantling the same.

As one of the renewable power generation means, a wind power generator is known.

Wind turbines can be classified into onshore and offshore wind turbines depending on the installation location. Offshore wind turbines generally use a concrete caisson type, a monopile type, a jacket type, and a floating type depending on the structure of the foundation.

The concrete caisson type maintains its position through its own weight and the frictional force of the sea floor, and has the advantage of being relatively easy to manufacture and install. However, the concrete caisson type can be used in a relatively shallow depth of 6-10m, and it may cause stability problems with eccentric slopes in poor ground.

The monopile type is a method of fixing a pile of other caliber on the bottom of the sea by driving or drilling, and is known to be economical when used in a large complex. The monopile type is one of the most common basic methods at present, and can be installed at a depth of 25-30m. As a disadvantage, a fatigue load or corrosion problem on the member is pointed out.

The jacket type uses a jacket type structure fixed to the sea floor with a pile or the like. The jacket type has the advantage that it can be applied to a relatively wide depth of 20 to 30m, and it is economical when constructing a large-scale complex like the monopile type. In addition, the jacket type is known to have high reliability as relatively many cases have been established so far.

The floating type is a method of floating a kind of floating object on the sea. In general, it is intended to be applied at a depth of 60 to 120m. The floating type can be applied to a relatively deep sea or deep sea due to the limited depth of water, and is recognized as one of the important tasks of future offshore wind power generation.

On the other hand, a floating wind turbine is known as a spar type, a semi-submersible type, and a tension-leg platform (TLP) depending on the shape of the floating body.

The spar type uses a column-type float. The spa type has the advantage of excellent exercise performance because it has a small water line area and a sufficient depth below the draft line. In addition, the spa type has an advantage in terms of manufacturing due to its simple structure and shape, and its center of gravity is lower than the center of buoyancy, so the possibility of rollover is low. On the other hand, the spa type can be applied to a relatively deep water depth of 120m or more, and it is pointed out that it is difficult to move or install.

The semi-submersible model is a model using a restoration moment similar to that of a ship, and is a method in which the vertical movement of the platform is attenuated by semi-submerging the substructure of large displacement to reduce the influence of waves at sea level. The semi-submersible type can be operated in shallower water than the spa type, and can be transported through a tug boat. However, there is a disadvantage that a high-cost ballast system is required.

The tension mooring type is a method in which the sea floor and the lower structure are combined with an elastic member. The tensile mooring type can be applied at a relatively low depth similar to the semi-submersible type, and has excellent characteristics in motion reduction performance in response to waves. However, the tension mooring type is a mooring method connected to the submarine ground, and the installation work of the anchoring system is quite difficult, and there is a risk of overturning if a breakdown or damage occurs in some of the plurality of mooring lines.

Embodiments of the present invention are intended to provide a spa-type wind turbine with improved installation convenience and a method of installing and dismantling the same.

According to an aspect of the present invention, it is formed extending in the longitudinal direction, the floating body floating on the sea; A tower extending in a longitudinal direction on an upper end of the floating body and integrally formed with the floating body; Concrete ballast provided at the bottom of the floating body; And an auxiliary buoyancy body disposed adjacent to the concrete ballast and having a ballast chamber. A spa-type wind turbine generator may be provided.

According to another aspect of the invention, the step of providing a tower assembly; Transferring the tower assembly to an installation location on the sea; Floating the tower assembly on the sea in a standing state; And installing at least one of a knuckles and a blade on the tower assembly, wherein the tower assembly includes: a floating body; A tower integrally formed with the floating body; Concrete ballast provided at the bottom of the floating body; And an auxiliary buoyancy body disposed adjacent to the concrete ballast and having a ballast chamber. A method of installing a spa-type wind power generator may be provided.

The spa-type wind turbine according to the embodiments of the present invention may be transported and installed by sea by integrally manufacturing a tower on a floating body, thereby significantly reducing installation cost and time.

In addition, the spa-type wind turbine according to the embodiments of the present invention can be installed offshore by a barge and a small and medium-sized crane, thereby reducing the use of a large offshore crane required for installation of the existing spa-type wind turbine.

In addition, the spa-type wind turbine according to the embodiments of the present invention uses an auxiliary buoyancy body, and although it is a pre-assembled tower, its transport or installation can be stably performed.

On the other hand, the installation and disassembly method according to the embodiments of the present invention can share the technical advantages of the spa-type wind turbine as described above.

1 is a schematic diagram of a spa-type wind turbine generator according to a first embodiment of the present invention.
2 is a longitudinal cross-sectional view of the spar type wind turbine shown in FIG. 1.
3 is a longitudinal sectional view of a spa-type wind turbine generator according to a second embodiment of the present invention.
4 and 5 are operation diagrams showing a first installation method of the spa-type wind turbine shown in FIG. 1.
6 and 7 are operation diagrams showing a second installation method of the spa-type wind turbine shown in FIG. 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be noted that the following embodiments are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following embodiments. The following embodiments are provided to more completely describe the present invention to a person with average knowledge in the relevant technical field, and detailed descriptions of known configurations that are determined to unnecessarily obscure the technical subject matter of the present invention are provided. I will omit it.

The spa-type wind turbine of the following embodiments is intended to be installed and used at sea, but is not limited thereto. If necessary, the spa-type wind turbine of the following embodiments can be applied in more various environmental conditions. In addition, in the present specification, it is referred to as a "spa type" wind power generator for convenience, but is not necessarily limited to such technical classification and applicable.

1 is a schematic diagram of a spa-type wind power generator 100 according to an embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view of the spar type wind power generator 100 shown in FIG. 1. FIG. 2 shows a cross section taken along line II-II of FIG. 1.

Referring to FIGS. 1 and 2, the spa-type wind turbine 100 according to the present embodiment may include a floating body 110.

The floating body 110 is floating on the sea and may provide a support structure for the tower 120 and the like. The floating body 110 of this embodiment is illustrated in a substantially cylindrical shape, but is not limited thereto.

According to the support structure of a known spa-type wind turbine, the floating body 110 may be formed to extend sufficiently in the longitudinal direction. For example, in the spa-type wind turbine 100 of the present embodiment, the total length including the float 110, the tower 120, etc. may be formed to be about 100 to 200 m. However, the spa-type wind turbine 100 of this embodiment is not necessarily limited to the illustrated length and applicable.

The floating body 110 may be formed in a hollow shape with an empty inside. Alternatively, the floating body 110 may have a ballast chamber 111 therein. Accordingly, the floating body 110 may provide buoyancy for floating the tower 120 and the like on the sea.

The floating body 110 may be partially or entirely formed of a concrete material. Alternatively, the floating body 110 may be partially or entirely formed of a concrete material including at least an outer surface. The floating body 110 made of concrete can be implemented at a lower cost than steel, and has a strong advantage against corrosion.

On the other hand, the spa-type wind power generator 100 of the present embodiment may include a tower 120.

The tower 120 may be formed extending from the floating body 110 in the longitudinal direction. If necessary, the tower 120 may be integrally formed with the floating body 110. That is, in one integrated structure, the upper structure may function as the tower 120 and the lower structure may function as the floating body 110.

Although not shown, a knuckles and blades may be installed on the top of the tower 120. However, in the spa-type wind turbine 100 of the present embodiment, the knuckles and the blades may be intended to be subsequently installed on the top of the tower 120 after the floating body 110 is installed offshore.

The tower 120 may be generally formed of a steel material. However, if necessary, some or all of the tower 120 may be replaced with a concrete material.

On the other hand, the spa-type wind power generator 100 of the present embodiment may include a concrete ballast 130.

Concrete ballast 130 may be disposed at the bottom of the floating body (110). Preferably, the concrete ballast 130 may be integrally formed with the floating body 110. In the case of this embodiment, the concrete ballast 130 has a shape embedded in the wall of the auxiliary buoyancy body 140 to be described later. This type of concrete ballast 130 may contribute to securing sufficient weight at the bottom of the floating body 110 and securing the structural strength of the auxiliary buoyancy body 140. However, the concrete ballast 130 may be anything that can add a predetermined weight at the bottom of the floating body 110, and is not necessarily limited to the illustrated bar.

On the other hand, the spa-type wind power generator 100 of this embodiment may include an auxiliary buoyancy body (140).

The auxiliary buoyancy body 140 may provide buoyancy to the tower 120 together with the floating body 110. The buoyancy of the auxiliary buoyancy body 140 may be used for transport and installation of the tower 120 and the like. If the auxiliary buoyancy body 140 is capable of providing a predetermined buoyancy, the internal structure or material thereof is not particularly limited.

Preferably, the auxiliary buoyancy body 140 has a predetermined internal space and may be provided at the bottom of the floating body 110. If necessary, the auxiliary buoyancy body 140 may be formed integrally with the above-described concrete ballast 130, or may share some configurations. In the case of this embodiment, the auxiliary buoyancy body 140 is illustrated to have a diameter of a predetermined degree larger than that of the floating body 110, and to have a substantially cylindrical shape. However, the shape of the auxiliary buoyancy body 140 is not necessarily limited to the illustrated bar.

The auxiliary buoyancy body 140 may be integrally formed with the concrete ballast 130. However, in some cases, the auxiliary buoyancy body 140 may be coupled to the floating body 110 by a predetermined mounting structure or may be formed to be removable from the floating body 110, and is not necessarily limited to an integral type.

The auxiliary buoyancy body 140 may be provided with a ballast chamber 141 therein. The auxiliary buoyancy body 140 may adjust the buoyancy through the outflow and outflow of seawater into the ballast chamber 141, and this may be used for the tower 120 to stand up at the installation position or for the installation of a knuckles.

The auxiliary buoyancy body 140 may be provided with ballast pipes 142 and 143. The ballast pipe 141 may be in communication with the ballast chamber 142 of the auxiliary buoyancy body 140 and may be formed to extend upward along the floating body 110 from the auxiliary buoyancy body 140. In the case of this embodiment, the ballast pipe 141 is exemplified in a form embedded in the outer wall of the concrete ballast 130 and the floating body 110. In this case, the lower end of the ballast pipe 141 may communicate with the ballast chamber 142 outside the concrete ballast 130, and the upper end of the ballast pipe 141 may communicate outside the outer wall of the floating body 110. If necessary, a plurality of ballast pipes 141 may be provided.

The auxiliary buoyancy body 140 may be provided with ballast pipes 142 and 143. The ballast pipe 141 may be in communication with the ballast chamber 141 of the auxiliary buoyancy body 140 and may be formed to extend upwardly along the floating body 110 from the auxiliary buoyancy body 140. In the case of this embodiment, the ballast pipes 142 and 143 are exemplified in a form buried in the outer wall of the floating body 110. In this case, the lower ends of the ballast pipes 142 and 143 may communicate with the ballast chamber 141, and the upper ends of the ballast pipes 142 and 143 may communicate outside the outer wall of the floating body 110.

If necessary, a plurality of ballast pipes 142 and 143 may be provided.

Further, the ballast pipes 142 and 143 may include a first ballast pipe 142 and a second ballast pipe 143. The first ballast pipe 142 may generally extend to the lower part of the ballast chamber 141, and the second ballast pipe 143 may extend only to the upper part of the ballast chamber 141. In this case, the first ballast pipe 142 may be used as a pipe for supplying and/or discharging seawater (ballast water), and the second ballast pipe 143 may be used as a pipe for supplying and/or discharging air. I can.

3 is a longitudinal sectional view of a spa-type wind power generator 200 according to a second embodiment of the present invention.

3, the spa-type wind turbine 200 of this embodiment may include a floating body 210, a tower 220 and an auxiliary buoyancy body 240, which is the same as the corresponding configurations of the above-described embodiment. Or similarly formed.

On the other hand, the spa-type wind power generator 200 of the present embodiment may include a concrete ballast 230.

The concrete ballast 230 of this embodiment is functionally corresponding to the concrete ballast 130 of the above-described embodiment, but has a specific structure or shape partially different. That is, the concrete ballast 230 of the present embodiment is formed in a column shape extending in the vertical direction, and is disposed in the center of the ballast chamber 241 inside the auxiliary buoyancy body 240. In this case, since the concrete ballast 230 is disposed in a vertical direction with respect to the tower 220 at the top, it may bring some advantages in stability or athletic performance.

Meanwhile, the auxiliary buoyancy body 240 may be provided with first and second ballast pipes 242 and 243. The first and second ballast pipes 242 and 243 of this embodiment may be buried in the outer wall of the floating body 110 and the concrete ballast 230. The first ballast pipe 242 may extend to the lower part of the ballast chamber 241, and the second ballast pipe 243 may extend only to the upper part of the ballast chamber 242. This is similar to the embodiment described above.

4 and 5 are operation diagrams showing a first installation method of the spa-type wind power generator 100 shown in FIG. 1.

For convenience, in this specification, a method of installing and disassembling the spa-type wind turbine 100 of the first embodiment will be described. However, the spa-type wind turbine 200 of the second embodiment can also be installed and disassembled in a manner similar to that described below.

Referring to FIG. 4A, a tower 120 including a floating body 110, a concrete ballast 130, and an auxiliary buoyancy body 140 is provided. In this embodiment, the floating body 110, the concrete ballast 130 and the auxiliary buoyancy body 140 may be provided integrally with the tower 120. However, the knuckles and blades at the top of the tower 120 may be omitted in this step. The knuckles, blades, etc. may be installed after the tower 120 is erected at sea.

A concrete ballast 130 and an auxiliary buoyancy body 140 may be provided at the bottom of the floating body 110. In the case of this embodiment, the concrete ballast 130 is provided integrally with the auxiliary buoyancy body 140. However, in some cases, the auxiliary buoyancy body 140 may be configured with a predetermined buoyancy means disposed outside the concrete ballast 130.

For convenience, hereinafter, an intermediate structure in which the auxiliary buoyancy body 140 and the concrete ballast 130 are provided in the tower 120 and the floating body 110 as described above is referred to as a tower assembly 150.

The tower assembly 150 may be lifted by the sea by a crane (C1). A plurality of cranes C1 are disposed along the longitudinal direction of the tower assembly 150, and may support the tower 120 at a plurality of points in the length direction of the tower assembly 150. Preferably, at least two cranes (C1) may be provided, and one crane (C1) supports one side of the tower assembly 150 spaced above the floating body 110, and the other crane (C1) ) May support the lower portion of the floating body 110 including the concrete ballast 130 and the auxiliary buoyancy body 140. The center of gravity of the tower 120, the floating body 110, and the concrete ballast 130 is considered.

Referring to (b) of Figure 4, the tower assembly 150 is launched into the sea adjacent to the quay wall by the crane (C1). The launched tower assembly 150 may be floated on the sea by the buoyancy of the floating body 110 and the auxiliary buoyancy body 140. Here, the position, weight, etc. of the concrete ballast 130 and the auxiliary buoyancy body 140 can be appropriately determined in the previous step so that the tower assembly 150 is arranged in a substantially parallel arrangement and can be floated on the sea.

Referring to (c) of FIG. 4, the launched tower assembly 150 may be moved to an installation position on the sea by a tugboat B1. The tower assembly 150 may be moved while floating on the sea, and the transfer of the tower preparation 150 may be performed in a direction corresponding to the longitudinal direction of the tower assembly 150. The tugboat B1 may tow the tower assembly 150 at a portion corresponding to the top of the tower assembly 150. This is because sufficient buoyancy can be secured at the lower portion of the tower assembly 150 by the auxiliary buoyancy body 140.

Referring to Figure 5 (a), after the transfer to the installation location on the sea is completed, the tower assembly 150 is installed standing upright. Specifically, while the tower assembly 150, which was floating on the sea, gradually rises around the concrete ballast 130, it is converted into a standing state as shown.

The standing of the tower assembly 150 is a method of gradually reducing the buoyancy by gradually lowering the tower assembly 150 to the installation depth through a crane, or by supplying seawater to the ballast chamber 141 of the auxiliary buoyancy body 140 Can be achieved. Alternatively, the tower assembly 150 may be erected while gradually reducing the buoyancy of the auxiliary buoyancy body 140 while being guided through a crane or the like.

Specifically, when seawater is supplied to the ballast chamber 141 of the auxiliary buoyancy body 140 in the state shown in (c) of FIG. 4, the lower part of the tower assembly 150 due to the weight of the concrete ballast 130 It slowly sinks.

If necessary, the above process can be performed in stages. That is, a predetermined amount of seawater is supplied to the auxiliary buoyancy body 140, and the arrangement of the tower assembly 150 is varied while receiving assistance from a crane or the like, and then the process is repeated step by step.

As the concrete ballast 130 is submerged below the sea level, the tower assembly 150 may be erected in a state as shown in (a) of FIG. 5. If necessary, after the tower assembly 150 is erected, the mooring line 160 may be installed.

Here, the tower assembly 150 may have a first water line D1. The first water line D1 may generally be formed on one side of the floating body 110 in the longitudinal direction, and more preferably, may be formed at an upper end of the floating body 110.

Referring to (b) of FIG. 5, seawater is then supplied to the auxiliary buoyancy body 140, and the tower assembly 150 may descend toward the seabed. For example, the tower assembly 150 may descend in units of several meters to tens of meters. Accordingly, the water line of the tower assembly 150 may be raised. That is, the tower assembly 150 may be disposed in the state of the second water line D2, and the second water line D2 may be set to a position higher than the first water line D1 by a predetermined degree. The height of the second water line D2 may generally correspond to one side in the length direction of the tower 120.

When the tower assembly 150 is lowered, a nucelle, a blade, etc. may be installed on the top of the tower 120. As the tower assembly 150 descends to the second waterline (D2), upper structures such as knuckles and blades only require work at a relatively low position (height). Accordingly, a relatively small capacity crane (C3) or the like can be used.

Although not shown, when an upper structure such as a knuckles is installed, seawater is discharged from the auxiliary buoyancy body 140 through the ballast pipes 142 and 143, and the tower 120 may be moved upward. That is, the water line is adjusted through the ballast, and the installation of the spa-type wind turbine 100 may be completed in a form in which an upper structure is added in a state as shown in FIG. 5A.

On the other hand, disassembly may be performed in the reverse order of the above installation method. That is, seawater is supplied to the auxiliary buoyancy body 140 in the installed state, and the tower 120 descends below the sea level. This is similar to (b) of FIG. 5. In addition, the upper structure such as the nucleus may be dismantled in the descending state, and the tower 120 may be floated while lying on the sea level again through the ballast. Thereafter, the tower 120 may be properly moved by a moving means such as a tugboat to be dismantled.

6 and 7 are operational diagrams showing a second installation method of the spa-type wind turbine 100 shown in FIG. 1

Whereas the above-described first installation method moves the tower assembly 150 by launching it on the sea, the second installation method of the present embodiment may use a method of moving the tower assembly 150 by placing it on the barge B2. . That is, the first installation method may be referred to as a wet towing method, and the second installation method may be referred to as a dry towing method.

Referring to Figure 6 (a), the tower assembly 150 is disposed on the barge (B2) ship. The tower assembly 150 may be disposed on the barge B2 in the longitudinal direction and may be seated on the barge B2 in a lying state. A plurality of supporters S1 are installed on the barge B2, and the tower assembly 150 may be fixedly supported.

The barge B2 may include a plurality of ballast chambers C1 to C5, and the plurality of ballast chambers C1 to C5 may be disposed in the longitudinal direction of the tower assembly 150 seated on the barge B2. . In this embodiment, the first to fifth ballast chambers C1 to C5 are illustrated, and the concrete ballast 130 corresponding to the bottom of the tower assembly 150 is disposed to substantially correspond to the first ballast chamber C1. .

One end portion of the tower assembly 150 corresponding to the concrete ballast 130 may be supported by the sliding plate P1. That is, one end of the tower assembly 150 may be seated and supported on the sliding plate P1. The sliding plate P1 may be mounted on the upper surface of the barge B2 and provided with a predetermined support surface. Preferably, the sliding plate P1 may be slidably movable around a predetermined range on the upper surface of the barge B2, and may be formed to be rotatable at an end of the barge B2 to a predetermined degree.

The tower assembly 150 has the above-described arrangement and can be transferred to an installation location on the sea. If necessary, the tower assembly 150 may be manufactured or assembled on the ship of the offshore barge B2, and then directly transferred to the installation location.

Referring to FIG. 6B, seawater is supplied to the ballast chambers C1 to C5 of the barge B2 at the installation position, so that the barge B2 may be gradually inclined. Specifically, seawater is gradually supplied to the first and second ballast chambers C1 and C2 corresponding to the lower part of the tower assembly 150, and accordingly, it may be disposed to be gradually inclined with respect to the sea level of the barge B2. . In addition, the tower assembly 150 may be gradually launched into the sea from the bottom due to the inclination to the barge B2 and the weight of the concrete ballast 130 at the bottom.

While the tower assembly 150 is launched into the sea, the sliding plate P1 may assist the longitudinal movement of the tower assembly 150. When the tower assembly 150 is launched over a predetermined length and the transition to the standing state is made, the sliding plate P1 is rotated at the end of the barge B2 by a predetermined degree, thereby assisting the launching and standing arrangement of the tower assembly 150 can do.

If necessary, in the process of moving and launching the tower assembly 150 as described above, ballasting to the auxiliary buoyancy body 140 may be performed together to assist movement or adjustment of the arrangement state.

When the tower assembly 150 is completely launched and erected at sea, the installation of a superstructure such as a nucelle can be made in a manner similar to that of FIG. 5 described above.

As described above, the spa-type wind turbine and its installation and dismantling method according to embodiments of the present invention can be transported and installed by sea by integrally manufacturing the tower 120 on the floating body 110, and through this Installation cost and time can be drastically reduced. As is known, conventional spa type wind turbines have limitations in terms of installation cost and time by using a method of separately manufacturing a tower and a floating body and assembling them offshore.

In addition, the spa-type wind turbine according to the embodiments of the present invention and the installation and dismantling method thereof can be installed offshore by barges (B1, B2) and small and medium-sized cranes (C1, C2), and thus the existing spa-type wind turbine generator It is possible to reduce the use of large offshore cranes required for installation.

In addition, the spa-type wind turbine and its installation and dismantling method according to embodiments of the present invention use the auxiliary buoyancy body 140, despite the pre-assembled tower 120, the transport or installation It can be done stably.

In the above, embodiments of the present invention have been described, but those of ordinary skill in the art will add, change, delete or add components within the scope not departing from the spirit of the present invention described in the claims. Various modifications and changes can be made to the present invention by means of the like, and it will be said that this is also included within the scope of the present invention.

100: spa-type wind turbine 120: tower
130: concrete ballast 140: auxiliary buoyancy body
150: tower assembly

Claims (12)

delete delete delete delete delete delete It relates to a method of installing a spa-type wind power generator,
The spa-type wind power generator,
It is formed extending in the longitudinal direction, the floating body 110 floating on the sea;
A tower 120 extending longitudinally on an upper end of the floating body 110 and integrally formed with the floating body 110;
Concrete ballast 130 provided at the bottom of the floating body 110; And
Including; an auxiliary buoyancy body 140 disposed adjacent to the concrete ballast 130 and having a ballast chamber 141,
Any one or more of the floating body 110 and the auxiliary buoyancy body 140 is partially or entirely formed of concrete,
The auxiliary buoyancy body 140 includes ballast pipes 142 and 143 which are in communication with the ballast chamber 141 and extend in a longitudinal direction along the floating body 110,
The ballast pipes (142, 143),
A first ballast pipe 142 communicating with a lower portion of the ballast chamber 141 to provide a supply and/or discharge path of seawater; And
Including; a second ballast pipe communicating with the upper portion of the ballast chamber 141 to provide a supply and/or discharge path of air
The above installation method,
The tower assembly 150 is provided;
Transferring the tower assembly 150 to an installation location on the sea;
Floating the tower assembly 150 on the sea in a standing state; And
Including; in the tower assembly 150, any one or more of the knuckles and blades are installed on the upper part,
The step of floating on the sea in the standing state,
Erecting the transferred tower assembly 150 in a first waterline (D1) state; And
Including; seawater is supplied to the auxiliary buoyancy body 140, and the erected tower assembly 150 is arranged in a state of a second water line (D1); and
The second water line (D2),
It is formed at a position higher by a predetermined degree than the first water line D1,
The step of installing the knuckles and blades,
After the tower assembly 150 is disposed in the second waterline (D1) state, at least one of the knuckles and the blade is installed; And
After any one or more of the knuckles and blades are installed, seawater is discharged from the auxiliary buoyancy body (140), and the water line of the tower assembly (150) is lowered. delete delete The method of claim 7,
The step of being transferred to the installation location includes the step of the tower assembly 150 being horizontally arranged so that the floating body 110 and the auxiliary buoyancy body 140 are suspended on the sea,
The step of floating on the sea in the standing state includes supplying sea water to the ballast chamber (142). The method of claim 7,
The step of transferring to the installation location includes the step of transferring the tower assembly 150 horizontally arranged on the barge (B2),
The barge B2 includes a plurality of ballast chambers C1 to C5 disposed in the longitudinal direction of the tower assembly 150,
The step of floating on the sea in a standing state includes supplying seawater to some of the ballast chambers C1 and C2 among the plurality of ballast chambers C1 to C5, and arranging the barge B2 to be inclined with respect to the sea level. Containing, the installation method of the spa-type wind power generator. delete

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