Wind power generation system and installation method thereof

Abstract

The invention relates to a wind power generation system and an installation method thereof. The wind power generation system comprises a tower, a cabin, a limiting sliding rail, a wind wheel, an inhaul cable and a wind gathering device. The tower is provided with a tower base, a bearing seat and a horizontal rotating shaft, the horizontal rotating shaft is installed on the rear side of the bottom of the tower, the tower is installed in the bearing seat through the tower rotating shaft, the bearing seat is installed in the tower base, a fixed pulley block and a fixing device are arranged on the top of the tower, and the cabin is fixedly installed on a limiting sliding rail in a sliding mode through the fixing device. A hoisting rope of the crane bypasses the fixed pulley block and then is fixedly connected with the cabin, the wind gathering device is obliquely installed on the wind receiving side of the tower, the wind speed can be increased, the wind speed difference in the vertical direction is reduced, the wind energy utilization rate and the overall running stability of the fan are improved, and the wind power generation system is low in manufacturing cost, simple in structure and convenient to use. The wind wheel and the cabin can be automatically hoisted and disassembled, installation and maintenance are very simple and convenient, and the installation and maintenance cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power generation system and an installation method thereof. Background Art

[0002] At present, wind turbines, especially high-power wind turbines, mainly adopt a lift-type three-blade horizontal axis wind rotor structure. The wind rotor shaft of this type of wind turbine is installed horizontally and the wind rotor rotates vertically. The wind rotor rotates to drive the speed increaser, and the speed increaser drives the generator to generate electricity after the speed increaser increases. The speed increaser and the engine are installed coaxially and are located in a rotatable nacelle at the top of the fixed tower. A large slewing bearing platform is installed on the top of the tower, and the nacelle is installed on the slewing bearing platform. When the wind direction changes, the nacelle rotates horizontally around the axis of the tower, and the wind rotor blades rotate around the tower body. The overturning moment generated by the wind rotor of this structural form of wind turbine works in all directions of the tower. Therefore, this structural form of wind power generation system has high requirements for the strength and stiffness of the tower in all directions. The shape and structure of the tower will also be limited, and the corresponding material consumption and material weight requirements are very large. In addition, the slewing bearing platform is set at the top of the tower, resulting in a high center of gravity, resulting in poor wind resistance of the tower as a whole. A large crane is required for the installation of a wind power generation system. First, the tower needs to be hoisted to assemble the tower, and then the nacelle and wind rotor blades need to be hoisted to the top of the tower for installation. The construction is difficult, expensive, and risky. During maintenance, maintenance personnel must take the elevator to the top of the tower to perform maintenance in the nacelle. Furthermore, the material and weight of the tower need to be increased, which increases the equipment cost, operation and maintenance cost, and the risk of high-altitude operations. As wind turbines become larger and larger, the height of the tower becomes higher and higher, and the challenges of cost, safety, installation, and operation and maintenance also increase. Therefore, traditional forms of wind power generation systems are relatively backward in many aspects. Summary of the invention

[0003] In order to overcome the defects and shortcomings of the above-mentioned prior art wind power generation systems, such as inconvenient installation, high manufacturing and maintenance costs, and poor wind resistance and stability, the present invention provides a wind power generation system and an installation method thereof with low manufacturing cost, simple structure and high wind energy utilization efficiency.

[0004] To achieve the above objectives, a first objective of an embodiment of the present invention is to provide a wind power generation system, comprising:

[0005] A nacelle, wherein a generator and a speed increaser are installed in the nacelle, wherein the generator is located below the speed increaser, wherein the speed increaser has an input shaft and an output shaft and adopts a multi-stage parallel shaft transmission, wherein the input shaft is located at the top of the speed increaser, and the output shaft is located at the bottom of the speed increaser;

[0006] A wind wheel, wherein the wind wheel has a wind wheel hub and wind wheel blades, and the wind wheel hub is mounted on the input shaft;

[0007] A tower, wherein the tower comprises a tower base, a bearing seat and a horizontal rotating shaft, the tower is installed in the bearing seat through the tower rotating shaft, the bearing seat is installed in the tower base, a fixed pulley group and a fixing device are arranged on the top of the tower, the horizontal rotating shaft is installed on the rear side of the bottom of the tower, the tower is fixedly hinged on the tower base through the horizontal rotating shaft, a crane is arranged at the bottom of the tower, a limiting slide rail arranged along the height direction of the tower is arranged on the back of the tower, the cabin is slidably fixedly installed on the limiting slide rail through the fixing device, the lifting rope of the crane is fixedly connected with the cabin after passing through the fixed pulley group and can drive the cabin to rise or fall along the limiting slide rail, and a front cable rod extending horizontally outward is arranged on the front side of the lower part of the tower;

[0008] A cable, the cable comprising a first upper cable and a first lower cable, the top end of the first upper cable being fixedly mounted on the upper part of the tower, the bottom end of the first upper cable being fixedly mounted on the top of the front cable rod, the top end of the first lower cable being fixedly mounted on the top of the front cable rod, and the lower end of the first lower cable being fixedly mounted on the tower base;

[0009] A wind gathering device is installed obliquely on the front side of the tower, the top edge of the wind gathering device is located at the tip position of the wind wheel blade, and the bottom edge of the wind gathering device is fixed to the top end of the front cable rod.

[0010] In some embodiments, preferably, it further includes a horizontal base and a slewing support platform, the horizontal base is arranged on the ground, the slewing support platform is fixedly mounted on the horizontal base, and the tower base is fixedly mounted on the slewing support platform.

[0011] In some embodiments, it is preferred that horizontally extending side cable rods are provided on the left and right sides of the tower, and the cables also include two groups of second upper cables and two groups of second lower cables, any two of the second upper cables form a group and the top ends of the second upper cables of the group are fixedly installed on the upper part of any side of the tower, the bottom ends of the second upper cables of the group are fixedly installed on the top of the side cable rods on any side, and any two of the second lower cables form a group and the top ends of the second lower cables of the group are fixedly installed on the side cable rods on any side. The top of the second lower cables is fixedly mounted on the tower base; the other two second upper cables form a group and the top ends of the second upper cables are fixedly mounted on the upper part of the other side of the tower, the bottom ends of the second upper cables are fixedly mounted on the top of the side cable rod on the other side, the other two second lower cables form a group and the top ends of the second lower cables are fixedly mounted on the top of the side cable rod on the other side, and the lower ends of the two second lower cables are fixedly mounted on the tower base.

[0012] In some embodiments, it is preferred that the tower is a rectangular frame structure or a triangular frame structure and a streamlined outer cover is installed on the tower.

[0013] In some embodiments, preferably, the cabin is a flat rectangular frame structure.

[0014] In some embodiments, preferably, the wind wheel blades are a three-blade structure or a two-blade structure.

[0015] In some embodiments, preferably, the wind concentrating device is composed of a rectangular frame and a cloth sheet, or the wind concentrating device is composed of a rectangular frame and a composite material sheet.

[0016] In some embodiments, preferably, the wind wheel is installed close to the downwind direction of the tower.

[0017] In some embodiments, it is preferred that the wind power generation system is installed on an offshore fixed platform or a rotatable floating platform. When the wind power generation system is installed on the rotatable floating platform, the slewing bearing platform under the tower base is eliminated.

[0018] In some embodiments, preferably, the number of the first upper cables and the first lower cables are both two, the top ends of the two first upper cables are fixedly installed on the upper part of the tower at the same time, the bottom ends of the two first upper cables are fixedly installed on the top of the front cable rod at the same time, the top ends of the two first lower cables are fixedly installed on the top of the front cable rod at the same time, and the lower ends of the two first lower cables are fixedly installed on the tower base.

[0019] To achieve the above-mentioned purpose, a second object of the embodiment of the present invention is to provide a method for installing a wind power generation system, comprising:

[0020] First, the tower shaft is installed in the bearing seat on the tower base, the horizontal shaft is installed at the rear side of the bottom of the tower, and the tower is fixedly hinged on the tower base through the horizontal shaft;

[0021] Secondly, after assembling the tower frame horizontally as a whole, the tower frame is vertically erected by pulling the first pull-down cable, and then fixedly connected to the tower frame base by bolts;

[0022] Then, the cabin is installed at the bottom of the limiting track through the fixing device, the crane is started to drive the lifting rope to lift the cabin to an appropriate height, and then the wind wheel blades are hoisted and installed on the wind wheel hub. After the wind wheel is installed, the crane continues to drive the lifting rope to lift the cabin to the top of the tower and fix it above the limiting track.

[0023] Compared with the prior art, the advantages of the wind power generation system provided by the embodiment of the present invention are: the tower is light in weight, strong in wind resistance, can reach a higher height, has higher wind energy utilization and safety, and has a simple structure and low cost; the wind wheel is in the downwind direction, and the blades are far away from the tower when receiving wind, completely eliminating the risk of blade sweeping the tower, reducing the strength and rigidity requirements of the blades, reducing the manufacturing cost of the blades, and the wind wheel is installed close to the tower, the main shaft is shortened, and the weight and cost are reduced accordingly; the wind gathering device is installed on the tower, which can increase the wind speed, reduce the wind speed difference in the vertical direction, and improve the wind energy utilization and the overall stability of the wind turbine operation; the speed increaser is arranged in a vertical direction with the generator, the center of gravity is low, and the speed increaser adopts a multi-stage parallel shaft transmission, which has a simple structure and low manufacturing cost; the wind wheel and the nacelle can be hoisted and disassembled by themselves, and the installation and maintenance are very simple and convenient, which greatly reduces the installation and maintenance costs. The wind power generation system of the present invention can utilize wind energy resources at higher altitudes, greatly reduce the overall cost, and has high environmental adaptability and economy. The advantages are more prominent when applied to low wind speed areas and offshore floating wind power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a three-dimensional structure of a preferred embodiment of a wind power generation system according to the present invention Figure 1 ;

[0025] Figure 2 For a wind power generation system according to the present invention Figure 1 The three-dimensional structure of the embodiment shown is schematically shown in FIG. Figure 2 ;

[0026] Figure 3 For a wind power generation system according to the present invention Figure 1A schematic diagram of the main structure of the embodiment shown;

[0027] Figure 4 For a wind power generation system according to the present invention Figure 1 A rear structural schematic diagram of the illustrated embodiment;

[0028] Figure 5 For a wind power generation system according to the present invention Figure 1 A schematic diagram of the structure of the right side of the embodiment shown. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings;

[0030] Embodiment 1:

[0031] like Figure 1-2 As shown, a wind power generation system of an embodiment of the present application is disclosed. The wind power generation system includes a horizontal base 1, a slewing support platform 2, a tower base 3, a tower 4, an input shaft 5, a cable, a nacelle 6 and a wind gathering device 11. The nacelle 6 is a flat rectangular frame structure. In this embodiment, the wind gathering device 11 is composed of a rectangular frame and a cloth sheet or a rectangular frame and a composite material sheet. The tower 4 has a tower shaft. The tower 4 is a rectangular frame structure or a triangular frame structure. In order to reduce wind resistance, a streamlined cover can be installed on the tower 4. The tower base 3 has a bearing seat. The tower 4 is rotatably installed in the bearing seat of the tower base 3 through the tower shaft. A wind wheel is installed on the nacelle 6. Specifically, the wind wheel has a wind wheel hub 7 and a wind wheel blade 20. The wind wheel blade 20 is a three-blade structure or a two-blade structure, which is not limited here. In this embodiment, a generator and a speed increaser are installed in the nacelle 6. The generator is located below the speed increaser. The speed increaser has an input shaft 5 and an output shaft. The wind wheel hub 7 is mounted on the input shaft 5. In this embodiment, the speed increaser adopts a multi-stage parallel shaft transmission, and the input shaft 5 is located at the top of the speed increaser, and the output shaft is located at the bottom of the speed increaser. In other words, the input shaft 5 is installed at the top of the speed increaser, and the output shaft is installed at the bottom of the speed increaser. The wind wheel is installed close to the downwind direction of the tower 4. The advantage of adopting this structural design is that the wind wheel is in the downwind direction, and the wind wheel blades 20 are away from the tower 4 when receiving wind, completely eliminating the risk of the wind wheel blades 20 sweeping the tower. In this embodiment, the horizontal base 1 is arranged on the ground, and the slewing support platform 2 is fixedly installed on the top of the horizontal base 1. The tower base 3 is fixedly installed on the slewing support platform 2.

[0032] See also Figure 3-5As shown, in this embodiment, a fixed pulley block 10 and a fixing device are provided at the top of the tower 4. Specifically, the fixed pulley block 10 is fixedly installed at the top position of the tower 4 through a fixing frame 19. There are two fixed pulleys in the fixed pulley block 10, and the two fixed pulleys are respectively located at the two ends of the fixing frame 19. The fixed pulley on the fixing frame 19 at either end is placed inside the tower 4, and the fixed pulley on the fixing frame 19 at the other end is located outside the tower 4. This structural design facilitates the crane to hoist the nacelle 6. A crane is provided at the bottom of the tower 4. The crane has a lifting rope 8. Specifically, the lifting rope 8 of the crane is successively passed around the fixed pulley on one end of the fixing frame 19 located inside the tower 4 and the fixed pulley located outside the tower 4, and then fixedly connected to the nacelle 6. A limiting slide rail 9 is provided on the back of the tower 4 along the height direction of the tower 4. In this embodiment, two mutually parallel limiting slide grooves are provided on the limiting slide rail 9. The cabin 6 is slidably fixedly mounted on the limiting slide rail 9 by the fixing device. The cabin 6 can be raised or lowered on the limiting slide rail 9 by the action of the crane, and the cabin 6 is fixedly mounted on any position of the limiting slide rail 9 by the fixing device. The fixing device is an electric caliper or an electromagnet.

[0033] A front cable rod 13 extending horizontally outward is provided at the front side of the lower part of the tower 4. In this embodiment, there are two front cable rods 13. The tails of the two front cable rods 13 are both vertically fixedly mounted on the tower 4. The cable includes a first upper cable 15 and a first lower cable 16, the top end of the first upper cable 15 is fixedly mounted on the upper part of the tower 4, the bottom end of the first upper cable 15 is fixedly mounted on the top of the front cable rod 13, the top end of the first lower cable 16 is fixedly mounted on the top of the front cable rod 13, and the lower end of the first lower cable 16 is fixedly mounted on the tower base 3. Similarly, in this embodiment, the number of the first upper cables 15 and the first lower cables 16 are both two, the top ends of the two first upper cables 15 are simultaneously fixedly mounted on the upper part of the tower 4, the bottom ends of the two first upper cables 15 are simultaneously fixedly mounted on the top of the corresponding front cable rods 13, the top ends of the two first lower cables 16 are simultaneously fixedly mounted on the top of the corresponding front cable rods 13, and the lower ends of the two first lower cables 16 are fixedly mounted on the tower base 3. The wind gathering device 11 is obliquely mounted on the front side of the tower 4. Specifically, the top edge of the wind gathering device 11 is at the lowest point of the blade tip of the wind wheel blade 20, and the bottom edge of the wind gathering device 11 is fixed to the top of the front cable rod 11.

[0034] In some embodiments, side cable rods 14 extending horizontally are provided on both the left and right sides of the tower 4. The number of side cable rods 14 on each side is two and they are vertically mounted on the side of the tower 4. In this embodiment, the cables also include two groups of second upper cables 17 and two groups of second lower cables 18, any two second upper cables 17 form a group and the top ends of the second upper cables 17 are fixedly mounted on the upper part of any side of the tower 4. The bottom ends of the second upper cables 17 are fixedly mounted on the top of the side cable rods 14 on any side. Any two second lower cables 18 form a group and the top ends of the second lower cables 18 are fixedly mounted on the top of the side cable rods 14 on any side, and the lower ends of the two second lower cables 18 are fixedly mounted on the tower base 3. The other two second upper cables 17 form a group and the top ends of the second upper cables 17 are fixedly mounted on the upper part of the other side of the tower 4, and the bottom ends of the second upper cables 17 are fixedly mounted on the top of the side cable rod 14 on the other side. The other two second lower cables 18 form a group and the top ends of the second lower cables 18 are fixedly mounted on the top of the side cable rod 14 on the other side, and the bottom ends of the two second lower cables 18 are fixedly mounted on the tower base 3. This structural design can effectively improve the stability of the tower 4. A horizontally arranged rotating shaft 12 is installed on the tower base 3, and the rotating shaft 12 is on the back of the tower 4. The tower 4 is installed in the bearing seat through the tower rotating shaft, and the bearing seat is installed in the tower base 3. The tower 4 is fixedly hinged on the tower base 3 through the horizontal rotating shaft 12.

[0035] The principle of the wind power generation system in this embodiment is that the tower shaft is first installed in the bearing seat on the tower base 3, and after the tower 4 is assembled horizontally as a whole, the two first lower cables 16 connected to the front cable rod 13 are pulled to vertically erect the tower 4, and the bottom of the tower 4 is fixed to the tower base 3 by bolts. After the tower 4 is installed, the cabin 6 is installed in the limiting track 9 at the bottom of the tower 4, and the cabin 6 is lifted to an appropriate height by the crane at the bottom of the tower 4, and then the wind wheel blades 20 are hoisted and installed on the hub 7. After the wind wheel is installed, the crane lifts the cabin 6 to the top of the tower 4 and realizes fixed limit through the fixing device. After the cabin 6 is installed as a whole, the wind wheel is in the downwind direction, and the incoming wind flows through the tower 4 and then flows through the wind wheel. Since the tower 4 is a rectangular frame structure, the wind resistance is small and the disturbance to the air flow is small.

[0036] Compared with the prior art, the beneficial effects of this embodiment are at least that: the tower 4 has a lower manufacturing cost, is lighter in weight and has a stronger wind resistance; the wind wheel is in the downwind direction, and the wind wheel blades 20 are away from the tower 4 when exposed to wind, completely eliminating the risk of the wind wheel blades 20 sweeping the tower; a wind gathering device 11 is installed on the tower 4, which can increase the wind speed, reduce the wind speed difference in the vertical direction, and improve the wind energy utilization rate and the overall stability of the wind turbine operation; the speed increaser is arranged in a vertical direction with the generator, with a low center of gravity, and the speed increaser adopts a multi-stage parallel shaft transmission, with a simple structure and low manufacturing cost; the wind wheel and the nacelle 6 are easy to hoist and disassemble by themselves, and the installation and maintenance are very simple and convenient, which greatly reduces the installation and maintenance costs.

[0037] Embodiment 2:

[0038] The difference between this embodiment and the first embodiment is that the horizontal base 1 is installed on an offshore semi-submersible floating platform.

[0039] Embodiment 3:

[0040] The difference between this embodiment and the first embodiment is that the tower base 3 is directly installed on the offshore single-point mooring rotatable floating platform without the slewing support platform 2 .

[0041] Embodiment 4:

[0042] The difference between this embodiment and the first embodiment is that the number of the speed increasing boxes and the number of the generators are two.

[0043] Embodiment 5:

[0044] The difference between this embodiment and the first embodiment is that the wind rotor blades 20 are arranged in a double-layer structure, and the number of wind rotor blades 20 in each layer is two.

[0045] Embodiment 6:

[0046] like Figure 1-5 As shown, a method for installing a wind power generation system is provided, comprising:

[0047] First, the tower shaft is installed in the bearing seat on the tower base 3;

[0048] Secondly, after assembling the tower 4 horizontally as a whole, the tower 4 is erected by pulling the first down-pull cable 16 and then fixedly connected to the tower base 3 by bolts;

[0049] Then, the cabin 6 is installed at the bottom of the limiting track 9 through the fixing device, and the crane is started to drive the lifting rope 8 to lift the cabin 6 to an appropriate height and then the wind wheel blades 20 are hoisted and installed on the wind wheel hub 7. After the wind wheel is installed, the crane continues to drive the lifting rope 8 to lift the cabin 6 to the top of the tower 4 and fix it above the limiting track 9.

[0050] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention still falls within the scope of the technical solution of the present invention. For example, the type of generator, the shape or structure of the hub tower, etc. The technical solution of the present invention includes any combination of all the above embodiments.

[0051] After reading this specification, it is not difficult for those skilled in the art to see that the present invention is composed of a combination of prior arts. Some of the prior arts constituting the various parts of the present invention are described in detail here, while some are not described in detail for the sake of simplicity of the specification, but those skilled in the art will understand what is said after reading the specification. It is also not difficult for those skilled in the art to see that the combination of these prior arts to constitute the present invention is full of a lot of creative work and is the result of many years of theoretical analysis and a large number of experiments by the inventor. Those skilled in the art can also see from the specification that each technical solution disclosed here and any combination of each feature are part of the present invention.

Claims

1. A wind power generation system, characterized in that: include: A nacelle, wherein a generator and a speed increaser are installed in the nacelle, wherein the generator is located below the speed increaser, wherein the speed increaser has an input shaft and an output shaft and adopts a multi-stage parallel shaft transmission, wherein the input shaft is located at the top of the speed increaser, and the output shaft is located at the bottom of the speed increaser; A wind wheel, wherein the wind wheel has a wind wheel hub and wind wheel blades, and the wind wheel hub is mounted on the input shaft; A tower, wherein the tower comprises a tower base, a bearing seat and a horizontal rotating shaft, the tower is installed in the bearing seat through the tower rotating shaft, the bearing seat is installed in the tower base, a fixed pulley group and a fixing device are arranged on the top of the tower, the horizontal rotating shaft is installed on the rear side of the bottom of the tower, the tower is fixedly hinged on the tower base through the horizontal rotating shaft, a crane is arranged at the bottom of the tower, a limiting slide rail arranged along the height direction of the tower is arranged on the back of the tower, the cabin is slidably fixedly installed on the limiting slide rail through the fixing device, the lifting rope of the crane is fixedly connected with the cabin after passing through the fixed pulley group and can drive the cabin to rise or fall along the limiting slide rail, and a front cable rod extending horizontally outward is arranged on the front side of the lower part of the tower; A cable, the cable comprising a first upper cable and a first lower cable, the top end of the first upper cable being fixedly mounted on the upper part of the tower, the bottom end of the first upper cable being fixedly mounted on the top of the front cable rod, the top end of the first lower cable being fixedly mounted on the top of the front cable rod, and the lower end of the first lower cable being fixedly mounted on the tower base; A wind gathering device is installed obliquely on the front side of the tower, the top edge of the wind gathering device is located at the tip position of the wind wheel blade, and the bottom edge of the wind gathering device is fixed to the top end of the front cable rod.

2. The wind power generation system according to claim 1, characterized in that: It also includes a horizontal base and a slewing support platform, wherein the horizontal base is arranged on the ground, the slewing support platform is fixedly mounted on the horizontal base, and the tower base is fixedly mounted on the slewing support platform.

3. The wind power generation system according to claim 1 or 2, characterized in that: The left and right sides of the tower are provided with side cable rods extending horizontally, and the cables also include two groups of second upper cables and two groups of second lower cables, any two of the second upper cables form a group, and the top ends of the second upper cables of the group are fixedly installed on the upper part of any side of the tower, and the bottom ends of the second upper cables of the group are fixedly installed on the top of the side cable rods on any side, and any two of the second lower cables form a group, and the top ends of the second lower cables of the group are fixedly installed on the top of the side cable rods on any side, and the lower ends of the two second lower cables of the group are fixedly installed on the tower base; the other two second upper cables form a group, and the top ends of the second upper cables of the group are fixedly installed on the upper part of the other side of the tower, and the bottom ends of the second upper cables of the group are fixedly installed on the top of the side cable rods on the other side, and the other two second lower cables form a group, and the top ends of the second lower cables of the group are fixedly installed on the top of the side cable rods on the other side, and the lower ends of the two second lower cables of the group are fixedly installed on the tower base.

4. The wind power generation system according to claim 1, characterized in that: The tower is a rectangular frame structure or a triangular frame structure and a streamlined outer cover is installed on the tower.

5. The wind power generation system according to claim 1, characterized in that: The wind wheel is installed close to the downwind direction of the tower, and the cabin is a flat rectangular frame structure.

6. The wind power generation system according to claim 1, characterized in that: The wind wheel blades are of a three-blade structure or a two-blade structure.

7. The wind power generation system according to claim 1, characterized in that: The wind gathering device is composed of a rectangular frame and a cloth sheet or a rectangular frame and a composite material sheet.

8. The wind power generation system according to claim 1, characterized in that: The wind power generation system is installed on an offshore fixed platform or a rotatable floating platform. When the wind power generation system is installed on the rotatable floating platform, the slewing bearing platform below the tower base is eliminated.

9. The wind power generation system according to claim 1, characterized in that: The number of the first upper cables and the first lower cables are both two, the top ends of the two first upper cables are fixedly installed on the upper part of the tower, the bottom ends of the two first upper cables are fixedly installed on the top of the front cable rod, the top ends of the two first lower cables are fixedly installed on the top of the front cable rod, and the lower ends of the two first lower cables are fixedly installed on the tower base.

10. A method for installing a wind power generation system, comprising: First, the tower shaft is installed in the bearing seat on the tower base; Secondly, after assembling the tower frame horizontally as a whole, the tower frame is vertically erected by pulling the first pull-down cable, and then fixedly connected to the tower frame base by bolts; Then, the cabin is installed at the bottom of the limiting track through the fixing device, the crane is started to drive the lifting rope to lift the cabin to an appropriate height, and then the wind wheel blades are hoisted and installed on the wind wheel hub. After the wind wheel is installed, the crane continues to drive the lifting rope to lift the cabin to the top of the tower and fix it above the limiting track.

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