Wind power generation device installation method and wind power generation system

Abstract

To provide a method for installing a wind power generation device.SOLUTION: The present invention is a method for installing a wind power generation device by reusing an existing structure. A structure comprises a foundation and a steel framework structure fixed onto the foundation. The installation method comprises a step of forming a base part by removing at least a part of the framework structure. The installation method comprises a step of fixing the wind power generation device to the base part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a method for installing a wind turbine generator and a wind turbine system. [Background technology]

[0002] There are cases where a wind power generation device is installed near an existing structure such as a steel tower that supports an overhead power transmission line. Patent Document 1 discloses a related technique. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-139042 Summary of the Invention [Problem to be solved by the invention]

[0004] A foundation is required to install a wind power generation device, but building a new foundation requires pouring new concrete, which takes time and effort. [Means for solving the problem]

[0005] The installation method for a wind turbine generator disclosed in this specification is a method for installing a wind turbine generator by reusing an existing structure. The structure includes a foundation and a steel framework structure fixed on the foundation. The installation method includes a step of forming a base by removing at least a portion of the framework structure. The installation method also includes a step of fixing the wind turbine generator to the base.

[0006] The existing structure may be of various types. For example, it may be a steel tower supporting an overhead power transmission line, or a structure supporting various heavy machinery for constructing a new structure. In the above configuration, an existing structure can be reused to form a base for fixing the wind turbine generator. Since there is no need to construct a new base, the time and man-hours required to install the wind turbine generator can be reduced. This makes it possible to reduce the installation cost of the wind turbine generator.

[0007] The framework structure may be a first pylon supporting the overhead power transmission line. The installation method may further include a step of constructing a second pylon to encase the first pylon, which is performed before the forming step. The installation method may further include a step of moving the overhead power transmission line from the first pylon to the second pylon after the constructing step. The forming step may be performed after the moving step. In the above configuration, a base can be formed inside the newly constructed second pylon. The site of the second pylon can be used effectively.

[0008] The forming step may include a step of removing a portion of the first pylon so that the base includes the lower part of the first pylon fixed to the foundation. The forming step may include a step of connecting the lower part of the first pylon included in the base to the second pylon using a connecting member. In the above configuration, the height of the base can be made higher than the foundation. Since the wind power generation device can be installed at a high altitude where the wind speed is faster than on the ground, it is possible to improve power generation efficiency.

[0009] The framework structure may be a crane tower with a crane fixed to the top. The method may further include a step of constructing a third pylon using a crane, which is performed before the forming step. In the forming step, the crane may be removed and at least a portion of the crane tower may be removed. In the above configuration, the crane tower used to construct the third pylon can be reused to form the base. Since there is no need to build a new base, the time and labor required to install the wind turbine generator can be reduced.

[0010] The wind power generation system disclosed in this specification includes a first steel tower that supports an overhead power transmission line. The wind power generation system includes a second steel tower that is located inside or near the first steel tower and that does not support the overhead power transmission line. The wind power generation system includes a wind power generation device that is located on top of the second steel tower. The second steel tower has a structure in which part of the upper framework structure has been removed. In the above configuration, the second steel tower that does not support the overhead power transmission line can be reused to form a base for fixing the wind power generation device. Since there is no need to build a new base, it is possible to reduce the installation costs of the wind power generation device. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic configuration diagram of a wind turbine generator 1. FIG. [Figure 2] FIG. 2 is a schematic top view taken along line II-II in FIG. [Figure 3] 10 is a flowchart illustrating a method for installing the wind turbine generator 30. [Figure 4] 1 is a diagram illustrating a method for installing a wind turbine generator 30. FIG. [Figure 5] FIG. 2 is a diagram illustrating a method for installing a wind power generation system 201. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0012] (Configuration of wind power generation system 1) Fig. 1 shows a schematic side view of the wind power generation system 1. Fig. 2 shows a schematic top view taken along line II-II in Fig. 1. For ease of understanding, Fig. 2 shows only the main components. The wind power generation system 1 mainly comprises a base 2, a wind turbine 30, and a second steel tower 120.

[0013] The second steel tower 120 is a structure for placing an overhead power transmission line (not shown). The second steel tower 120 has a structure in which equal-leg angle steel or steel pipes are joined with bolts or the like. For ease of viewing, the second steel tower 120 is shown in phantom lines in FIG. 1. The second steel tower 120 includes foundations 111-114, main pillar members 121-124, multiple horizontal members 125, and multiple diagonal members 126.

[0014] The foundations 111-114 are fixed to the ground GND. The foundations 111-114 are structural members for supporting the second pylon 120. The type of the foundations 111-114 is not particularly limited, and may be, for example, a concrete foundation or a steel foundation. As shown in FIG. 2, the foundations 111-114 are arranged at the four corners of a quadrangle. The base ends 121b-124b of each of the main pillar members 121-124 are fixed to the foundations 111-114. The main pillar members 121-124 extend upward (in the +z direction) from the foundations 111-114. The distance between the main pillar members 121-124 decreases as the height of the second pylon 120 increases. Therefore, the second pylon 120 is substantially pyramidal in shape and has a central axis CA. The horizontal members 125 and diagonal members 126 are members that connect the main pillar members 121 to 124 and thereby reinforce the main pillar members 121 to 124. The horizontal members 125 and diagonal members 126 form a truss structure.

[0015] The base 2 and the wind power generation equipment 30 are located inside the second steel tower 120. As will be described later, the base 2 is a structure formed by removing a portion of the existing first steel tower 2A. The base 2 comprises a foundation 11-14, a framework structure 20, and connecting members 51-54. The framework structure 20 is made of steel and is fixed on top of the foundation 11-14. The foundation 11-14 is fixed to the ground GND. The foundation 11-14 is a structural member for supporting the framework structure 20. As shown in FIG. 2, the foundations 11-14 are arranged at the four corners of a quadrangle.

[0016] The frame structure 20 is a structural body for installing the wind turbine generator 30. The frame structure 20 is made of equal-leg angle steel or steel pipes joined with bolts or the like. The frame structure 20 includes main columns 21-24, multiple horizontal columns 25, and multiple diagonal columns 26. The base ends 21b-24b of each of the main columns 21-24 are fixed to the foundation 11-14. The main columns 21-24 extend upward (in the +z direction) from the foundation 11-14. The distance between the main columns 21-24 decreases as the frame structure 20 becomes taller. The upper ends 21u-24u of the main columns 21-24 form an installation surface IS perpendicular to the central axis CA. The installation surface IS is the surface on which the wind turbine generator 30 is installed. Therefore, the frame structure 20 has a truncated quadrangular pyramid shape. The horizontal members 25 and diagonal members 26 are members that connect the main pillar members 21 to 24 and thereby reinforce the main pillar members 21 to 24. The horizontal members 25 and diagonal members 26 form a truss structure.

[0017] Connecting members 51-54 extend from upper ends 21u-24u toward each of the main pillar members 121-124, displacing upward. The lower end of connecting member 51 is fixed to upper end 21u of main pillar member 21. The upper end of connecting member 51 is fixed to main pillar member 121. Similarly, the lower end of connecting member 52 is fixed to upper end 22u of main pillar member 22. The upper end of connecting member 51 is fixed to main pillar member 122. Connecting members 53 and 54 have a similar structure, so illustrations and explanations thereof will be omitted.

[0018] The wind turbine generator 30 is located on top of the framework structure 20. The wind turbine generator 30 includes a vertical axis wind turbine. The vertical axis wind turbine may have various structures, such as a gyromill type, a Darrieus type, or a Savonius type. The wind turbine generator 30 includes a generator 31, a main rotating shaft 32, a wind turbine 33, and legs 41-44. The main rotating shaft 32 extends upward from the generator 31. The wind turbine 33 includes multiple rotor blades 33w, multiple lower arms 33b, and multiple upper arms 33u. The multiple rotor blades 33w are arranged in a cylindrical shape around the main rotating shaft 32. The multiple lower arms 33b connect the lower portions of the multiple rotor blades 33w to the main rotating shaft 32. The multiple upper arms 33u connect the upper portions of the multiple rotor blades 33w to the main rotating shaft 32.

[0019] The leg members 41-44 extend from the generator 31 toward each of the main pillar members 21-24 while being displaced downward. The lower end of the leg member 41 is fixed to the upper end 21u of the main pillar member 21. The upper end of the leg member 41 is fixed to the generator 31. Similarly, the lower end of the leg member 42 is fixed to the upper end 22u of the main pillar member 22. The upper end of the leg member 42 is fixed to the generator 31. Note that the leg members 43 and 44 have a similar structure, so illustrations and explanations thereof will be omitted.

[0020] The power transmission line 37 connects the generator 31 to an overhead power transmission line (not shown). The power transmission line 37 enables the power generated by the generator 31 to be supplied to the grid.

[0021] (operation) The installation method of the wind turbine generator 30 will be described using the flowchart in Fig. 3 and the explanatory diagram in Fig. 4. Hereinafter, "Step 10" will be abbreviated as "S10." In S10, the first tower 2A that needs to be rebuilt is prepared (see Fig. 4(A)). The first tower 2A supports the overhead transmission line 70.

[0022] In S20, the second tower 120 is constructed so as to encase the first tower 2A (see FIG. 4(B)). In FIG. 4, the second tower 120 is shown by imaginary lines. This construction method is also called an encasement method. The specific details of the encasement method are known, so a description thereof will be omitted here.

[0023] In S30, the overhead power transmission line 70 is moved from the first steel tower 2A to the second steel tower 120 (see arrow A1).

[0024] In S40, the upper part 2u of the framework structure of the first tower 2A is removed (see FIG. 4(B)). As a result, the remaining lower part 2b forms the base part 2 (see FIG. 4(C)). The lower part 2b is the part that is fixed to the foundation.

[0025] In S50, the base 2 is connected to the second pylon 120 using connecting members 51-54 (see Figure 1). In S60, the wind turbine generator 30 is fixed to the base 2. Specifically, the generator 31 is connected to each of the main pillar members 21-24 by leg members 41-44 (see Figures 1 and 2). This completes the wind turbine system 1.

[0026] (effect) A foundation is required to install a wind turbine generator. However, constructing a new foundation requires time and labor, such as pouring new concrete. With the technology of this embodiment, the first tower 2A that needs to be rebuilt can be reused to form the foundation 2 to which the wind turbine generator 30 is fixed. In other words, the first tower 2A that is normally removed can be reused as the foundation 2. Because there is no need to construct a new foundation 2, the time and labor required to install the wind turbine generator 30 can be reduced. It is possible to reduce the installation cost of the wind turbine generator 30.

[0027] With the technology of this embodiment, the base 2 can be formed to include the lower part 2b of the first steel tower 2A. This allows the height of the installation surface IS of the base 2 to be higher than the foundation. The wind power generation device 30 can be installed at a high altitude where the wind speed is higher than on the ground, making it possible to improve power generation efficiency. Furthermore, by removing the upper part 2u of the first steel tower 2A, the height of the base 2 can be made lower than that of the first steel tower 2A. The wind pressure received by the base 2 can be made smaller than that received by the first steel tower 2A. It is possible to reduce the load burden on the base 2.

[0028] With the technology of this embodiment, the base 2 can be formed inside the newly constructed second pylon 120. Since the site of the second pylon 120 can be used effectively, it becomes possible to construct a new wind turbine generator 30 without securing a new site. [Example]

[0029] (Configuration of wind power generation system 201) An installation method of a wind power generation system 201 according to Example 2 will be described with reference to Fig. 5. Fig. 5 is a side view similar to Fig. 4 of Example 1. Components common to Example 2 and Example 1 are given common reference numerals, and descriptions thereof will be omitted. Components unique to Example 2 are distinguished by being given reference numerals in the 200s.

[0030] Figure 5(A) shows the completed third pylon 220. The third pylon 220 is a pylon newly constructed using the crane system 200. The third pylon 220 can be constructed by known methods such as the climbing crane method. The crane system 200 comprises a foundation 211, a crane tower 202A, and a crane 203. The crane tower 202A has a framework structure. The base of the crane tower 202A is fixed to the foundation 211. The crane 203 is fixed to the top of the crane tower 202A.

[0031] Next, as shown in Fig. 5(B), the crane 203 is removed. Also, the upper part 202u of the framework structure of the crane tower 202A is removed. As a result, the remaining lower part 202b forms the base part 202. Finally, as shown in Fig. 5(C), the wind turbine generator 30 is fixed to the top of the base part 202. This completes the wind turbine power generation system 201.

[0032] (effect) In the technology of the second embodiment, the crane tower 202A used in constructing the third pylon 220 can be reused to form the base 202. Since there is no need to construct a new base 202, the time and man-hours required to install the wind turbine generator 30 can be reduced.

[0033] Although the embodiments have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples exemplified above. The technical elements described in this specification or drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technology exemplified in this specification or drawings simultaneously achieves multiple objectives, and achieving one of these objectives itself has technical utility.

[0034] (Variation) The wind turbine generator 30 may be arranged in various ways relative to the base 2. For example, the wind turbine generator 30 may be installed on the ground GND at a position adjacent to the base 2. This allows some of the four foundations 11-14 of the base 2 to be used as the foundation for the wind turbine generator 30. This makes it possible to reduce the installation costs of the wind turbine generator 30.

[0035] The entire framework may be removed in the process of forming the base 2. In this case, the base 2 is made up of only the foundation.

[0036] The connecting members 51-54 that secure the base 2 to the main pillar members 21-24 may be omitted.

[0037] The wind turbine 33 may have various structures, for example, it may be a horizontal axis wind turbine.

[0038] The structure of the base 2 may vary. For example, it may have a shape of a roughly triangular truncated pyramid with three bases. [Explanation of symbols]

[0039] 1: Wind power generation system 2: Base 2A: First tower 11-14: Foundation 20: Frame structure 30: Wind power generation equipment 120: Second tower

Claims

1. A method for installing a wind power generation device by utilizing an existing structure, The structure comprises a foundation and a steel framework fixed on the foundation; the framework structure is a first pylon supporting an overhead power transmission line; The method of installing includes: constructing a second tower so as to enclose the first tower; After the constructing step, moving the overhead transmission line from the first tower to the second tower; forming a base portion by removing at least a portion of the framework structure after the moving step; a step of fixing the wind turbine generator to the base; A method for installing a wind power generation device, comprising:

2. The forming step includes: removing a portion of the first pylon so that the base portion includes a lower portion of the first pylon fixed to the foundation; Connecting the lower portion of the first pylon included in the base portion to the second pylon using a connecting member; The installation method of claim 1 , comprising:

3. A method for installing a wind power generation device by utilizing an existing structure, The structure comprises a foundation and a steel framework fixed on the foundation; The framework structure is a crane tower with a crane fixed to the top thereof, The method of installing includes: erecting a third tower using the crane; a step of forming a base by removing at least a portion of the framework structure, the step being carried out after the constructing step; a step of fixing the wind turbine generator to the base; Equipped with The method for installing a wind turbine generator, wherein in the forming step, the crane is removed and at least a part of the crane tower is removed.

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