WO2011143799A1

WO2011143799A1 - Wind-ocean dual-effect power generator

Info

Publication number: WO2011143799A1
Application number: PCT/CN2010/001682
Authority: WO
Inventors: 黎焱; 刘作辉; 姚利斌
Original assignee: 华锐风电科技(集团)股份有限公司
Priority date: 2010-05-21
Filing date: 2010-10-25
Publication date: 2011-11-24
Also published as: CN102251928A

Abstract

A wind-ocean dual-effect power generation device includes a base (11) rooted on a sea bed (10), a wind power generator (1) connected with the base (11) above a sea level (20), and an ocean power generator (2) connected with the base (11) under the sea level (20). The wind power generator (1) includes a tower cylinder (12), a cabin (13), a hub (14) and blades (15). The lower end of the tower cylinder (12) is connected with the base (11), and the top end of the tower cylinder (12) is provided with the cabin (13). The hub (14) is provided outside of the cabin (13), and the blades (15) are provided on the hub (14). The ocean power generator (2) includes at least one group of ocean blades (21). After the voltages generated by the wind power generator (1) and the ocean power generator (2) are both increased by a transformer (3) provided in the tower cylinder (12), the electric power is transmitted to a step-up substation by submarine cables (4) and incorporated into the national power grid. The constructions of the submarine cables (4) and the base (11) are all necessary to the wind power generation and the ocean power generation. Because the combined power generation system can fully reorganize the two constructions, the combination of the wind power generation and the ocean power generation can decrease the cost of per kilowatt electricity in power grid.

Description

Wind current dual-effect power generation device

The invention relates to a power generation device in which wind power generation and ocean current power generation coexist. Background technique

In recent years, with the development of wind power technology and the gradual improvement and improvement of unit performance, wind turbines are becoming more and more economical and efficient, and the capacity of single units is also increasing. Under the same installed capacity, the number of units and floor space are gradually reduced. Save on infrastructure investment. However, with the further development of the wind power industry, the development of land wind farms has become increasingly saturated. Moreover, as the capacity of the wind turbine unit increases gradually, the length and weight of the components of the unit also increase, which greatly increases the difficulty and cost of transportation and installation of the unit. In contrast, offshore wind farms (offshore wind farms) have the advantages of high wind speed, low turbulence, and low wind shear. The offshore wind turbines have larger blade diameters, lower rated wind speeds, and higher hub heights at the same rated power. Low (low tower height) and high tip speed ratio, which can greatly increase the unit's power generation and extend the life of the unit. At present, offshore wind power in the world is booming, and China has also planned a tens of kilowatt-class offshore wind farm.

However, compared with onshore wind power, due to the difficulty in construction of submarine cables, foundations and wind turbines, the unit cost of offshore units is relatively high, and the economics and benefits of offshore wind farm construction are yet to be tested. In order to make full use of the submarine cable and offshore foundation laid, reduce the cost per kW of offshore wind turbines, improve the economics of offshore wind farms and reduce the investment risk of offshore wind farms, it can be improved by: 1) Continue to improve the stand-alone of offshore wind turbines However, the capacity is limited by the technical development of wind turbine components (such as blades, gearboxes, etc.). At present, the world's most viable offshore units can only reach 6~7MW, and are still in the stage of design development, prototype trial and prototype experiment. , does not have the conditions for large-scale development. 2) Supplemented by other forms of renewable energy, such as the more mature form of ocean tidal current power generation as a supplement to wind power generation. Summary of the invention

The main object of the present invention is to provide a wind power ocean current Han power generation device, which requires submarine cable construction and foundation construction in both wind power generation and ocean current power generation, and the combined power generation system can fully integrate the two parts of the construction, so the sea The combination of wind power and ocean current power generation can reduce the cost per kilowatt of electricity on the grid.

A secondary object of the present invention is to provide a wind power ocean current double-effect power generation device, which can provide a wind power generation and ocean current wind power connection without increasing the single unit capacity and overall construction amount of the offshore wind turbine. New energy plan;

Another object of the present invention is to provide a wind-power ocean current double-effect power generation device, which can achieve better power generation efficiency than offshore wind farms under the prior art conditions by the "pitching" and "yaw" actions of the wind power generator. .

In order to achieve the above object, the present invention relates to a wind current dual-effect power generation device, which comprises:

Foundation, fixed on the seabed;

a wind power generator, connected to a base above the sea level, the wind power generator having a tower, a nacelle, a hub and a blade, the lower end of the tower is connected to the foundation, the top of the tower is installed in the nacelle, and the hub is mounted with a hub , the blade is mounted with a blade;

An ocean current generator, connected to a base below the sea level, having at least one set of ocean current blades; wherein the wind power generator and the ocean current generator are both boosted by a transformer installed inside the tower and then transported via a submarine cable to The booster station is incorporated into the national grid.

The wind current dual-effect power generation device, wherein the hoisting system is further installed on the basis, and the hoisting system is used for lifting the ocean current generator.

The wind current dual-effect power generation device, wherein the wind power generator is a high-power grid-connected wind power generator.

The wind current dual-effect power generation device, wherein the angle of attack of each blade of the wind power generator can be changed.

In the wind current dual-effect power generation device, the angle of attack of each ocean current blade of the ocean current generator can be changed.

In the wind current dual-effect power generation device, the connecting portion of the nacelle and the tower of the wind power generator is provided with a relative sliding device.

The wind current dual-effect power generation device, wherein a wind turbine generator cabin is internally provided with a PLC and a yaw drive device, and a wind measurement device is disposed outside the cabin.

The wind current dual-effect power generation device, wherein the foundation is a single pile type, a multi pile type or a sunken box structure.

Advantageous technical effects of the present invention are:

1) Since submarine cable construction and foundation construction are required in both wind power generation and ocean current power generation, and the combination of the two power generation systems can fully integrate the two parts of construction, the combination of offshore wind power generation and ocean current power generation reduces the amount of electricity per kilowatt. cost.

2) Provided on the premise of not increasing the single unit capacity and overall construction volume of offshore wind turbines A new energy scheme combining wind power generation and ocean current wind power;

3) Through the "pitching" and "yaw" actions of wind turbines, it achieves better power generation efficiency than offshore wind farms under the current conditions. DRAWINGS

1 is a schematic structural view of an embodiment of the present invention;

Figure 2 is a schematic view showing the water surface of the ocean current generator in the present invention;

Figure 3 is a schematic view of a submarine cable in the present invention;

4 is a schematic structural view of another embodiment of the present invention.

DESCRIPTION OF REFERENCE NUMERALS: 1-wind generator; 2-current current generator; 10-sea bed; 11-base; 12-tower;

13-cabin; 14-hub; 15-blade; 20-sea level; 21- ocean current blade; 3-transformer; 4-submarine cable; 5-winding system. Detailed ways

In order to achieve the above-mentioned purpose of use and efficacy and the technical means adopted, the present invention is described as a preferred embodiment, and as shown in the drawings, the details are as follows:

As shown in Fig. 1, an embodiment of the present invention, wherein the wind current dual-effect power generating apparatus of the present invention comprises a wind power generator 1 and a ocean current generator 2. The foundation 11 of the double-effect power generation device is fixed on the seabed 10, and the foundation 11 may be a single pile type, a multi-pile type or a caisson type structure. When the single/multi-pile foundation is used, the pile is inserted into the seabed 10 and the concrete is poured into the pile to fix the whole power generation system. When the caisson foundation is used 11, the caisson can be pumped into the seabed 10 to extract water and sludge from the caisson. And the air, the base 11 is fixed to the seabed 10 by a negative pressure.

The foundation 11 is connected to the wind turbine 1 above the sea level 20, which comprises a tower 12, a nacelle 13, a hub 14 and blades 15. The lower end of the tower 12 is connected to the foundation 11, and the top end of the tower 12 is mounted to the nacelle 13.

The connecting portion of the nacelle 13 and the tower 12 is provided with a relative sliding device. For example, a bearing (not shown) may be disposed at the joint of the nacelle 13 and the tower 12, and the inner casing of the bearing and the outer casing of the bearing are respectively associated with the nacelle 13 and the tower.

The 12 connection achieves a relative sliding of the two. The cabin 13 is internally equipped with a PLC (Programmable logic

a controller, a programmable logic controller, and a yaw drive device, wherein the drive motor is used to drive the gear rotation to drive the rotation of the bearing gear to realize the rotation of the nacelle 13 relative to the tower 12, and the outside of the nacelle 13 is provided with a wind measurement device. The wind direction data measured by the wind measuring device is connected by the PLC inside the nacelle 13 Receiving, the PLC calculates the yaw angle according to the wind measurement signal, and then the yaw drive device drives the nacelle 13 to yaw, so that the nacelle 13 can rotate relative to the tower 12 according to the change of the wind direction, thereby realizing the automatic rotary wind function.

A hub 14 is mounted outside the nacelle 14. A hub is disposed on the hub 14 for the blades 15 to be mounted. The angle of each blade 15 relative to the hub 14 can be varied to change the efficiency of the blade's energy conversion by changing the angle of attack of the blades 15. In the present invention, the feature that the angle of attack of the blade 15 is variable may be simply referred to as "pitching"; and the nacelle 13 can automatically turn the wind according to the change of the wind direction, which may be referred to as "yaw" for short.

The wind power generator 1 used in the present invention is a high power grid-connected wind power generator.

The foundation 1 1 is connected to the ocean current generator 2 below the sea level. The ocean current generator 2 mainly includes two sets of ocean current blades 21, and the ocean current blade 21 can also adjust the angle of attack of the ocean current blade 21 to change the conversion energy. s efficiency. The pedestal of the ocean current blade 21 is fixed on the foundation 1 1 when the ocean current generator generates electricity, that is, it cannot rotate around the foundation 1 1 during power generation, because the existing ocean current generator 2 can rotate around the foundation during power generation, but This function achieves high cost in a seawater environment, and the rotary system is relatively easy to be corroded and not practical.

In addition, as shown in FIG. 2, a hoisting system 5 is further mounted on the foundation 1 1 , and the hoisting system 5 can lift the ocean current generator 2, and the main purpose is to realize the convenience of the water surface when the ocean current generator 2 is operated and maintained. Replace the accessories.

As shown in FIG. 3, the wind current dual-power generation device of the present invention requires a grid-connected wind power system, and both the wind power generator 1 and the ocean current generator 2 are boosted by a transformer 3 installed inside the tower 12 and then passed through a submarine cable. 4 is delivered to the booster station 6 and incorporated into the national grid 7.

As shown in FIG. 4, another embodiment of the present invention is different from the foregoing embodiment of the present invention only in that the ocean current generator 2 includes only one set of ocean current blades 21, which is suitable for less power demand. Case.

It can be seen from the above that the combination of offshore wind power generation and ocean current power generation reduces the cost per kilowatt of on-grid electricity, mainly because submarine cable construction and foundation construction are required in both wind power generation and ocean current power generation, and the combined power generation system can fully integrate this. Two-part construction; realizing a new energy scheme combining wind power generation and ocean current wind power without substantially increasing the single unit capacity and overall construction volume of offshore wind turbines; through the "pitching" of wind turbines, The yaw "action" achieves better power generation efficiency for offshore wind farms under existing technical conditions.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, so that the numerical value is changed or the equivalent component is replaced, or the equivalent variation is made according to the scope of the present invention. And modifications should still fall within the scope of the invention patent.

Claims

Rights request

A wind current dual-effect power generation device, comprising:

Foundation, fixed on the seabed;

2. The wind current dual-effect power generating apparatus according to claim 1, further comprising a hoisting system for lifting the ocean current generator.

The wind current dual-effect power generating apparatus according to claim 1, wherein the wind power generator is a high power grid-connected wind power generator.

4. The wind current dual-effect power generating apparatus according to claim 1, wherein an angle of attack of each blade of the wind power generator can be changed.

The wind current dual-effect power generating apparatus according to claim 1, wherein an angle of attack of each of the ocean current blades of the ocean current generator can be changed.

6. The wind current dual-effect power generating apparatus according to claim 1, wherein a joint portion of the nacelle and the tower of the wind power generator is provided with a relative sliding device.

7. The wind current dual-effect power generating apparatus according to claim 1, wherein a cabin of the wind power generator is provided with a PLC and a yaw driving device, and a wind measuring device is disposed outside the nacelle.

The wind current ocean power generation device according to claim 1, wherein the foundation is a single pile type, a multi pile type or a caisson type structure.