阅读说明：本技术 海上风机发电系统 (Offshore wind turbine power generation system ) 是由 韦莺 王坤鹏 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种海上风机发电系统,其包括有至少两个发电机组；设置在发电机组下方的浮体,浮体用于对海上风机发电系统提供浮力,浮体包括第一浮体和至少两个第二浮体,第二浮体分别设置在第一浮体两侧,任意一个第二浮体与第一浮体通过第一支撑连接,任意一个发电机组与第一浮体通过第二支撑连接,任意一个发电机组与第二浮体通过第三支撑连接,通过将多个浮体和多个发电机组连接成一个整体,可以有效地将风力发电机组的重力以及气动载荷传递到浮体上,提高了对发电机组支撑的强度,避免因使用斜拉索发生破断产生的危险,同时,由于设置多个浮体,增大了水线面积,降低了吃水要求,而且多个发电机组共用多个浮体,降低了度电成本。(The invention discloses an offshore wind turbine power generation system, which comprises at least two generator sets; the floating body is arranged below the generator set and used for providing buoyancy for the offshore wind turbine power generation system, the floating body comprises a first floating body and at least two second floating bodies, the second floating bodies are respectively arranged at two sides of the first floating body, any one second floating body is connected with the first floating body through a first support, any one generator set is connected with the first floating body through a second support, any one generator set is connected with the second floating body through a third support, and the plurality of floating bodies and the plurality of generator sets are connected into a whole, can effectively transfer the gravity and the pneumatic load of the wind generating set to the floating body, improve the supporting strength of the wind generating set, avoid the danger caused by the breakage of the stay cable, and simultaneously, because set up a plurality of bodies, increased the waterline area, reduced the draft requirement, a plurality of generating set sharing a plurality of bodies has reduced the power consumption cost moreover.)

1. An offshore wind turbine power generation system is characterized by comprising at least two generator sets;

the floating body is arranged below the generator set and used for providing buoyancy for the offshore wind turbine power generation system, the floating body comprises a first floating body and at least two second floating bodies, the second floating bodies and the generator set are respectively arranged on two sides of the first floating body, any one of the second floating bodies is connected with the first floating body through a first support, any one of the generator set is connected with the first floating body through a second support, and any one of the generator set is connected with the second floating body on the same side through a third support.

2. The offshore wind turbine power generation system of claim 1, wherein the number of the first supports and the third supports is at least two.

3. The offshore wind turbine power generation system of claim 1, wherein the first support is two, the third support is two, and the first support, the second support and the third support on one side of any one of the second floats are in a tetrahedron shape in space.

4. The offshore wind turbine power generation system of claim 1, further comprising:

a mooring device for securing a position of the offshore wind turbine power generation system at sea;

the buoy is connected with the first floating body, the lower end of the buoy is connected with one end of the mooring device, and the first floating body can rotate relative to the buoy.

5. The offshore wind turbine power generation system of claim 4, wherein the first buoy further comprises a bearing, the buoy and the first buoy being connected by the bearing.

6. The offshore wind turbine power generation system of claim 4, wherein the generator set includes a cable for outputting electrical power, the second support and the first buoy include a passage for passing the cable therethrough, the buoy includes a central passage for passing the cable therethrough, the central passage extends from a top end of the buoy to a bottom end of the buoy, and the cable is connected to the outside through the passage and the central passage in sequence.

7. The offshore wind turbine power generation system of claim 1, wherein the second buoy is streamlined.

8. The offshore wind turbine power generation system of claim 4, wherein the second floating body is elongated on the water surface, the length direction of the second floating body is consistent, and the plane of any one of the generator set blades is perpendicular to the length direction of the second floating body.

9. The offshore wind turbine power generation system of claim 4, wherein the mooring device comprises a chain or suction anchor.

10. The offshore wind turbine power generation system of any of claims 1 to 9, wherein there are an even number of the generator sets, the generator sets being symmetrically distributed on either side of the first buoy.

Technical Field

The invention relates to an offshore wind turbine power generation system.

Background

In the prior art, the unit-degree electricity cost of offshore wind power is reduced by increasing the capacity of a single machine, the large capacity of the single machine means that a larger wind wheel is needed for capturing wind energy, a larger tower frame is needed for supporting a generator set, and a stronger foundation is needed for supporting the tower frame, the offshore generator set in the prior art is supported by a Y-shaped tower frame, and a plurality of stay cables are used for improving the rigidity of the tower frame, the existing floating type foundation mainly comprises a tension leg type, a semi-submersible type, a single column type and a barge type, the barge type foundation with the lowest requirement on draught is the form of the several foundation types, but the barge type foundation has a square shape, and is the most subjected to wave flow under the same wave flow condition, the existing fan mainly adopts the semi-submersible type and the single column type, the two foundation types have relatively higher requirements on draught, particularly the single column type foundation, and the patent with the publication number of CN211874639U adopts the semi-submersible type foundation type, patent publication No. EP2906818B1 adopts a single column foundation, both patents adopt a Y-shaped tower frame to support two generator sets, meanwhile, a plurality of stay cables are adopted to improve the rigidity of the tower frame, the installation of the stay cables and the tensioning of pretension are complicated, the stay cables are fragile in breakage, no early warning is given when the breakage occurs, and the danger is high.

Disclosure of Invention

The invention aims to overcome the defect of supporting of an offshore generator set in the prior art and provides an offshore wind turbine power generation system.

The invention solves the technical problems through the following technical scheme:

an offshore wind turbine power generation system comprises at least two generator sets;

the floating body is arranged below the generator set and used for providing buoyancy for the offshore wind turbine power generation system, the floating body comprises a first floating body and at least two second floating bodies, the second floating bodies and the generator set are respectively arranged on two sides of the first floating body, any one of the second floating bodies is connected with the first floating body through a first support, any one of the generator set is connected with the first floating body through a second support, and any one of the generator set is connected with the second floating body on the same side through a third support.

In this scheme, through setting up a plurality of bearing structure, can connect into a whole with a plurality of bodies and a plurality of generating set, bearing structure can transmit wind generating set's gravity and aerodynamic load to the body effectively, the intensity and the stability of supporting to generating set have been improved, and avoid the use of suspension cable among the traditional pylon structure, avoid taking place the danger of rupture production because of using the suspension cable, and simultaneously, owing to set up a plurality of bodies, the waterline area has been increased, the draft requirement has been reduced, and a plurality of generating set share a plurality of bodies, the kilowatt-hour cost is reduced.

Preferably, the number of the first supports and the third supports is at least two.

In this scheme, adopt a plurality of first supports and third to support the bearing structure atress that makes power generation system more even, improved the intensity and the stability of supporting.

Preferably, the number of the first supports is two, the number of the third supports is two, and the first support, the second support and the third support on one side of any one of the second floating bodies are in a tetrahedron shape in space.

In this scheme, body and generating set both can connect into a whole with the body through the bearing structure who is the tetrahedron and distributes, and every face of tetrahedron all is the better triangle-shaped of stability moreover, has improved the intensity and the stability of support, simple structure simultaneously, save material.

Preferably, the offshore wind turbine power generation system further comprises:

a mooring device for securing a position of the offshore wind turbine power generation system at sea;

the buoy is connected with the first floating body, the lower end of the buoy is connected with one end of the mooring device, and the first floating body can rotate relative to the buoy.

In this scheme, a plurality of generating set sharing mooring arrangement to reduce the unit degree cost of electricity, can fix whole power generation system in appointed sea area through mooring arrangement and flotation pontoon, when the wind direction changes moreover, the whole that connects into by body, bearing structure and generating set can rotate by the flotation pontoon relatively, through the rotation of whole relative flotation pontoon, can make generating set's wind wheel perpendicular wind direction all the time, make the generated energy the biggest, improve the generating efficiency.

Preferably, the first floating body further comprises a bearing, and the buoy is connected with the first floating body through the bearing.

Preferably, the generator set includes a cable for outputting electric energy outwards, the second support and the first floating body include a channel for passing the cable, the buoy includes a middle channel for passing the cable, the middle channel extends from the top end of the buoy to the bottom end of the buoy, and the cable sequentially passes through the channel and the middle channel to be connected to the outside.

In this scheme, the cable passes the cable system that downwardly extends to the external world after the passageway, and a plurality of generating set sharing cable system can reduce unit degree cost of electricity, and simultaneously, the cable is supported at the second, the passageway of first body and flotation pontoon in extends, has avoided cable and other structure winding.

Preferably, the second float is streamlined.

In this scheme, the second body adopts streamlined appearance, and the waterline area is big, can furthest reduce its stormy waves flowing force that receives, is convenient for make offshore wind turbine power generation system fix in appointed sea area.

Preferably, the second floating body is long-strip-shaped on the water surface, the length directions of the second floating bodies are consistent, and the plane where the blade of any one of the generator sets is located is perpendicular to the length direction of the second floating body.

In this scheme, when the stormy wave direction changes, the whole that comprises body, generating set and bearing structure can rotate round the flotation pontoon, because the second body is rectangular shape on the surface of water, the length direction of second body can be all the time towards the unrestrained minimum direction that flows that receives, promptly with the stormy wave direction unanimity, the blade of generating set can face the wind direction all the time, makes this power generation system have the direction indicator characteristics, realizes automatic to the wind, makes the generated energy the biggest, guarantees the generating efficiency.

Preferably, the mooring means comprises a chain or suction anchor.

Preferably, the number of the generator sets is even, and the generator sets are symmetrically distributed on two sides of the first floating body.

In this scheme, when wind blows to generating set's blade, because generating set is at first body bilateral symmetry distribution, the moment that produces on each blade can offset completely, avoids generating set's the skew wind direction of blade, guarantees the generating efficiency.

The positive progress effects of the invention are as follows: through setting up a plurality of bearing structure, can connect into a whole with a plurality of bodies and a plurality of generating set, bearing structure can transmit wind generating set's gravity and pneumatic load to the body effectively, the intensity and the stability of supporting to the generating set have been improved, and avoid the use of suspension cable among the traditional pylon structure, avoid taking place the danger of rupture production because of using the suspension cable, and simultaneously, owing to set up a plurality of bodies, the waterline area has been increased, the draft requirement has been reduced, and a plurality of generating set share a plurality of bodies, the power consumption cost has been reduced.

Drawings

Fig. 1 is a schematic structural diagram of an offshore wind turbine power generation system according to an embodiment of the present invention.

Fig. 2 is a schematic view of the internal structure of the second support, the first floating body and the pontoon according to the embodiment of the invention.

Description of reference numerals:

generator set 1

First float 20

Second float 21

First support 31

Second support 32

Third support 33

Mooring device 4

Buoy 5

Cable 6

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1, an offshore wind turbine power generation system includes at least two generator sets 1; the floating type wind turbine generator system is characterized by further comprising a floating body arranged below the generator set 1, the floating body is used for providing buoyancy for an offshore wind turbine power generation system, the floating body comprises a first floating body 20 and at least two second floating bodies 21, the second floating bodies 21 and the generator set 1 are respectively arranged on two sides of the first floating body 20, any one of the second floating bodies 21 is connected with the first floating body 20 through a first support 31, any one of the generator set 1 is connected with the first floating body 20 through a second support 32, and any one of the generator set 1 is connected with the second floating body 21 on the same side through a third support 33. Through setting up a plurality of bearing structure, can connect into a whole with a plurality of bodies and a plurality of generating set 1, bearing structure can transmit wind generating set 1's gravity and pneumatic load to the body effectively, the intensity and the stability of supporting generating set 1 have been improved, and avoid the use of suspension cable among the traditional pylon structure, avoid taking place the danger of rupture production because of using the suspension cable, and simultaneously, owing to set up a plurality of bodies, the waterline area has been increased, the draft requirement has been reduced, and a plurality of generating set 1 share a plurality of bodies, the kilowatt-hour cost is reduced.

As shown in fig. 1, in the present embodiment, the first floating body 20 is configured to be a cylinder shape, the diameter of which is about 20 to 30 meters, and in other embodiments, it may also be configured to be a ship shape, wherein two second floating bodies 21 are distributed on both sides of the first floating body 20, the length of the second floating body 21 is about 140 meters, and the width of the second floating body 21 is about 18 meters, the first floating body 20 and the second floating bodies 21 on both sides are used for providing good buoyancy recovery stability for the whole offshore wind turbine power generation system, the second floating bodies 21 on both sides are connected with the first floating body 20 through a first support 31 with a cross-sectional diameter of 2 to 5 meters, so that the movement of the floating bodies is always kept consistent, the bottom of the nacelle of the generator set 1 is connected with the first floating body 20 and the second floating body 21 through a second support 32 and a third support 33 with a cross-sectional diameter of 1 to 4 meters, respectively, the second support 32 and the third support 33 can effectively transmit the gravity and the aerodynamic load of the generator set 1 to the floating bodies, the draft of the whole system is about 10 m, and in other embodiments, a plurality of generator sets 1 and a plurality of corresponding second floating bodies 21 can be arranged, so that the cost of power consumption can be further reduced.

Furthermore, the number of the first supports 31 and the third supports 33 is at least two, and the multiple first supports 31 and the multiple third supports 33 are adopted, so that the stress of the support structure of the power generation system is more uniform, and the support strength and stability are improved. As shown in fig. 1, in the present embodiment, the number of the first supports 31 and the third supports 33 is two, respectively, and in other embodiments, a plurality of the first supports 31 and the third supports 33 may be provided to improve the supporting effect. In other embodiments, the number of the first supports 31 and the third supports 33 may be one.

As shown in fig. 1, in the present embodiment, the first support 31 is two, the third support 33 is two, and the first support 31, the second support 32, and the third support 33 on one side of any one of the second buoyant bodies 21 are in a tetrahedron shape in space. The floating body and the generator set 1 are connected through the supporting structure distributed in a tetrahedron, so that the floating body can be connected into a whole, each surface of the tetrahedron is a triangle with better stability, the supporting strength and stability are improved, and meanwhile, the structure is simple, and materials are saved.

In this embodiment, the offshore wind turbine power generation system further includes a mooring device 4 and a buoy 5, the mooring device 4 is used for fixing the position of the offshore wind turbine power generation system at sea, the buoy 5 is connected with the first floating body 20, the lower end of the buoy 5 is connected with one end of the mooring device 4, and the first floating body 20 can rotate relative to the buoy 5. The mooring device 4 is shared by a plurality of generator sets 1, so that the unit-degree electricity cost is reduced, the whole power generation system can be fixed at a designated sea area through the mooring device 4 and the buoy 5, when the wind direction changes, the whole body formed by the floating body, the supporting structure and the generator sets 1 can rotate relative to the buoy 5, the wind wheel of the generator sets 1 can always vertically wind through the rotation of the whole body relative to the buoy 5, the generated energy is maximized, and the power generation efficiency is improved, wherein the buoy 5 is positioned at the central position of the first floating body 20, in other embodiments, the buoy 5 can be positioned at the front part of the first floating body 20, the buoy 5 is cylindrical, the lower part of the buoy is connected to the sea bottom through the mooring device 4, the mooring device 4 comprises an anchor chain or a suction anchor, particularly, the mooring device 4 can adopt a catenary anchor chain or a tension cable to connect the suction anchor of the sea bottom, the first floating body 20 further comprises a bearing (not shown in the figure), and the buoy 5 is connected with the first floating body 20 through the bearing, wherein the bearing comprises a main bearing and a lower bearing, and the main bearing can adopt a roller bearing or a gear bearing. In other embodiments, the mooring device 4 may not be provided, and other devices that can be fixed in position at sea may be substituted as in the prior art, and the buoy 5 may not be provided.

As shown in fig. 2, in the present embodiment, the power generator set 1 includes a cable 6 for outputting electric power, the second support 32 and the first floating body 20 include a passage for the cable 6 to pass through, the buoy 5 includes a middle passage for the cable 6 to pass through, the middle passage extends from the top end of the buoy 5 to the bottom end of the buoy 5, and the cable 6 passes through the middle passage and the passage in sequence to be connected to the outside. The cable 6 passes through the channel and then extends downwards to an external cable 6 system, the multiple generator sets 1 share the cable 6 system, the unit-degree electric cost can be reduced, and meanwhile, the cable 6 extends in the second support 32, the first floating body 20 and the buoy 5, so that the cable 6 is prevented from being wound with other structures.

In this embodiment, the second floating body 21 is streamlined, the second floating body 21 has a streamlined shape, and the waterline area is large, so that the wind wave and current force applied to the second floating body 21 can be reduced to the maximum extent, and the offshore wind turbine power generation system can be conveniently fixed in a designated sea area.

In this embodiment, the second floating body 21 is elongated on the water surface, the length direction of the second floating body 21 is the same, and the plane where the blade of any one of the generator sets 1 is located is perpendicular to the length direction of the second floating body 21. When the direction of the wind and the waves changes, the whole composed of the floating body, the generator set 1 and the supporting structure can rotate around the floating cylinder 5, because the second floating body 21 is in a strip shape on the water surface, the length direction of the second floating body 21 can always face the direction with the minimum wave flow, namely, the direction is consistent with the direction of the wind and the waves, the blades of the generator set 1 can always face the wind direction, so that the power generation system has the characteristics of direction indicator, realizes automatic wind alignment, has the maximum power generation amount, and ensures the power generation efficiency.

The number of the generator sets 1 is even, the generator sets 1 are symmetrically distributed on two sides of the first floating body 20, when wind blows to the blades of the generator sets 1, as the generator sets 1 are symmetrically distributed on two sides of the first floating body 20, the moment generated on each blade can be completely offset, the blades of the generator sets 1 are prevented from deviating from the wind direction, and the power generation efficiency is ensured, as shown in fig. 1, in the embodiment, two generator sets 1 are symmetrically distributed on two sides of the first floating body 20, in other embodiments, the number of the generator sets 1 can be set to be 4, 6, 8 and other even numbers, and are symmetrically distributed on two sides of the first floating body 20, of course, in other embodiments, the number of the generator sets 1 can be set to be odd, or when the number is even, the generator sets 1 are asymmetrically distributed on two sides of the first floating body.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.