A floating offshore wind farm and its layout strategy

Abstract

The present application relates to a floating offshore wind farm and its layout strategy, which includes: when the total number of mooring lines connected to each wind turbine is three, if the number of rows of multiple wind turbines is even and the number of wind turbines in each row is even, the number of all pile foundations satisfies formula (1); if the number of rows of multiple wind turbines is even and the number of wind turbines in each row is odd, the number of all pile foundations satisfies formula (2); if the number of rows of multiple wind turbines is odd, the number of all pile foundations satisfies formula (3). For the floating offshore wind farm provided by the present application, according to the above formulas, when the number of rows and the number of wind turbines in each row gradually increase, the number of pile foundations occupied by each wind turbine on average approaches 0.5 at least. Therefore, on the premise of ensuring normal operation, the number of pile foundations occupied by each wind turbine on average is reduced as much as possible, making the overall structure compact, not occupying too much sea area, and reducing the construction cost and workload.

Description

Technical Field

[0001] The present application relates to the field of wind power generation, and in particular to a floating offshore wind turbine wind farm and its arrangement strategy. Background Art

[0002] At present, due to the continued shortage of energy, the demand for clean and renewable energy is increasing. Offshore wind power has the characteristics of rich resources, high power generation hours, no land occupation, no water consumption and suitability for large-scale development. In recent years, wind power has become one of the most commercialized renewable clean energy technologies.

[0003] Offshore wind turbine foundations include fixed offshore wind turbine foundations, which include monopile foundations, jacket foundations, tripod foundations, and gravity foundations. They are primarily suitable for water depths of 0 to 50 meters near the coast, with different foundation structures applicable to different water depths. Fixed offshore wind turbine foundations are located in shallow waters, making construction relatively easy, with a simple overall structure and high stability. However, once built, fixed offshore wind turbine foundations cannot be moved and are difficult to dismantle. They have strict water depth requirements and are not suitable for offshore waters with richer wind energy resources.

[0004] In related technologies, in order to overcome the above-mentioned shortcomings of fixed offshore wind turbine foundations, floating offshore wind turbine foundations have gradually been developed. Compared with fixed offshore wind turbine foundations, floating offshore wind turbine foundations can be installed in deeper sea areas with richer wind energy, and are not necessarily limited to shallow continental shelves with limited areas. At the same time, they can be installed in waters far away from the coastline, which makes it easier to eliminate visual impacts and can greatly reduce the adverse effects of noise and electromagnetic waves on the coastal environment.

[0005] However, the foundation of a floating offshore wind turbine includes a floating platform and a mooring system, and the floating platform must be spatially positioned and motion constrained by the mooring system. This means that the entire floating offshore wind turbine wind farm occupies a larger sea area, resulting in a waste of sea space and even squeezing out other uses of the sea area. In addition, the wind turbines of a floating offshore wind farm usually require multiple pile foundations for fixation. Currently, each wind turbine occupies an average of multiple pile foundations, which increases construction costs and the amount of engineering work. Summary of the Invention

[0006] The embodiments of the present application provide a floating offshore wind turbine wind farm and its layout strategy to solve the problem in the related art that each wind turbine in a floating offshore wind farm occupies an average of a large number of pile foundations, which increases the construction cost as well as the engineering workload and the occupied sea area.

[0007] In a first aspect, a floating offshore wind turbine wind farm is provided, comprising:

[0008] Multiple wind turbines, each of which is connected with a mooring line. One end of the mooring line is connected to the wind turbine, and the other end is connected to a pile foundation.

[0009] When the total number of the mooring lines connected to each wind turbine is three, the number of rows of the multiple wind turbines arranged is even, and the number of wind turbines in each row is even, the number of all the pile foundations satisfies formula (1);

[0010] When the total number of the mooring lines connected to each wind turbine is three, the number of rows of the multiple wind turbines arranged is even, and the number of wind turbines in each row is odd, the number of all the pile foundations satisfies formula (2);

[0011] When the total number of the mooring lines connected to each wind turbine is three, and the number of rows of the multiple wind turbines arranged is odd, the number of all the pile foundations satisfies formula (3); where,

[0012]

[0013]

[0014] m = in + 2i + n + 2 Formula (3)

[0015] In the formula, m is the number of all the pile foundations, n is the number of wind turbines in each row, 2i is the number of rows when the number of rows arranged is even, and 2i + 1 is the number of rows when the number of rows arranged is odd.

[0016] In some embodiments, the wind turbines on each row are arranged at intervals according to a preset trajectory;

[0017] The preset trajectory is wavy or zigzag.

[0018] In some embodiments, the distance between each pile foundation and the adjacent wind turbine is equal;

[0019] The distance between each adjacent wind turbine is equal.

[0020] In some embodiments, the distance between adjacent wind turbines is equal to the distance between each pile foundation and the adjacent wind turbine.

[0021] In some embodiments, the total number of the mooring lines connected to each pile foundation is one, two, three or six.

[0022] In some embodiments, when the total number of the mooring lines connected to each wind turbine is six, the number of rows of the multiple wind turbines arranged is not less than two rows, and the arrangement shape of the multiple wind turbines is a honeycomb structure.

[0023] In some embodiments, when the total number of the mooring lines connected to each of the wind turbines is six, at least six of the wind turbines are connected to the corresponding mooring lines and pile foundations to form a wind power generation unit, and each of the wind power generation units has a snowflake structure.

[0024] In some embodiments, a plurality of the wind power generation units are regularly arranged in the transverse direction and / or the longitudinal direction, and the number of the pile foundations shared by two adjacent wind power generation units is 1 to 2;

[0025] A plurality of the wind power generation units are continuously and regularly arranged, and the number of the pile foundations shared by two adjacent wind power generation units is 2 to 6;

[0026] A plurality of the wind power generation units are arranged arbitrarily, and the number of the pile foundations shared by two adjacent wind power generation units is at least 1.

[0027] In a second aspect, a layout strategy for a floating offshore wind turbine farm is provided, which is used for implementing the floating offshore wind turbine farm as described above, and the steps thereof include:

[0028] A plurality of spaced-apart wind turbines and pile foundations are respectively arranged in a mooring area, and mooring lines are arranged between adjacent ones of the wind turbines and the pile foundations;

[0029] The total number of the mooring lines connected to each of the wind turbines is set to three, the number of rows of the plurality of wind turbines is set to be an even number, the number of the wind turbines in each row is set to be an even number, so that the number of all the pile foundations satisfies formula (1); or,

[0030] The total number of the mooring lines connected to each of the wind turbines is set to three, the number of rows of the plurality of wind turbines is set to be an even number, the number of the wind turbines in each row is set to be an odd number, so that the number of all the pile foundations satisfies formula (2); or,

[0031] The total number of the mooring lines connected to each of the wind turbines is set to three, the number of rows of the plurality of wind turbines is set to be an odd number, so that the number of all the pile foundations satisfies formula (3); wherein,

[0032]

[0033]

[0034] m = in + 2i + n + 2 formula (3)

[0035] In the formula, m is the number of all the pile foundations, n is the number of the wind turbines in each row, 2i is the number of rows when the number of rows is an even number, and 2i + 1 is the number of rows when the number of rows is an odd number.

[0036] In some embodiments, the wind turbines on each row are arranged at intervals according to a preset trajectory, and the preset trajectory is wavy or zigzag.

[0037] The beneficial effects brought by the technical solutions provided in this application include:

[0038] The embodiments of this application provide a floating offshore wind turbine farm. Since when the total number of mooring lines connected to each wind turbine is three, the number of rows of multiple wind turbines is even, and the number of wind turbines in each row is even, the number of all pile foundations satisfies formula (1); when the total number of mooring lines connected to each wind turbine is three, the number of rows of multiple wind turbines is even, and the number of wind turbines in each row is odd, the number of all pile foundations satisfies formula (2); when the total number of mooring lines connected to each wind turbine is three, and the number of rows of multiple wind turbines is odd, the number of all pile foundations satisfies formula (3). According to the above formulas, it can be seen that when the number of rows and the number of wind turbines in each row gradually increase, the number of pile foundations occupied by each wind turbine on average approaches 0.5 at least. Therefore, the arrangement of wind turbines and pile foundations on this floating offshore wind turbine farm can minimize the number of pile foundations occupied by each wind turbine on average while ensuring normal operation, making the overall structure compact, not occupying too much sea area, and at the same time minimizing the number of pile foundations as much as possible, reducing the construction cost and the amount of work. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 It is a schematic structural diagram when the number of rows of the wind turbine arrangement in the floating offshore wind turbine farm provided by the embodiment of this application is single-row and the number of wind turbines in each row is even;

[0041] Figure 2 It is a schematic structural diagram when the number of rows of the wind turbine arrangement in the floating offshore wind turbine farm provided by the embodiment of this application is two rows and the number of wind turbines in each row is even;

[0042] Figure 3 It is a schematic structural diagram when the number of rows of the wind turbine arrangement in the floating offshore wind turbine farm provided by the embodiment of this application is two rows and the number of wind turbines in each row is odd;

[0043] Figure 4 It is a schematic structural diagram when the number of rows of the wind turbine arrangement in the floating offshore wind turbine farm provided by the embodiment of this application is three rows and the number of wind turbines in each row is even;

[0044] Figure 5 It is a schematic structural diagram when the number of rows of the wind turbine arrangement in the floating offshore wind farm provided by the embodiment of the present application is three rows and the number of wind turbines in each row is odd;

[0045] Figure 6 It is a schematic structural diagram when the number of rows of the wind turbine arrangement in the floating offshore wind farm provided by the embodiment of the present application is four rows and the number of wind turbines in each row is even;

[0046] Figure 7 It is a schematic structural diagram when the number of rows of the wind turbine arrangement in the floating offshore wind farm provided by the embodiment of the present application is four rows and the number of wind turbines in each row is odd;

[0047] Figure 8 It is a schematic structural diagram when the number of rows of the honeycomb structure in the floating offshore wind farm provided by the embodiment of the present application is two rows;

[0048] Figure 9 It is a schematic structural diagram when the number of rows of the honeycomb structure in the floating offshore wind farm provided by the embodiment of the present application is multiple rows;

[0049] Figure 10 It is a schematic structural diagram when the number of rows of the honeycomb structure in the floating offshore wind farm provided by the embodiment of the present application is a single row;

[0050] Figure 11 It is a schematic structural diagram of the wind turbine units in the floating offshore wind farm provided by the embodiment of the present application in a snowflake structure;

[0051] Figure 12 It is a schematic structural diagram when multiple wind turbine units in the floating offshore wind farm provided by the embodiment of the present application in a snowflake structure are regularly arranged horizontally and / or vertically;

[0052] Figure 13 It is a schematic structural diagram when the wind turbine units in the floating offshore wind farm provided by the embodiment of the present application in a snowflake structure are continuously and regularly arranged;

[0053] Figure 14 It is a schematic structural diagram when the wind turbine units in the floating offshore wind farm provided by the embodiment of the present application in a snowflake structure are freely arranged.

[0054] In the figure: 1 - wind turbine, 2 - mooring line, 3 - pile foundation, 4 - wind turbine unit. Detailed implementation manners

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0056] An embodiment of this application provides a floating offshore wind farm, which can solve the problem in the related art that the number of pile foundations occupied by each wind turbine in a floating offshore wind farm is large, increasing the construction cost, the project volume, and the occupied sea area.

[0057] See Figure 1 As shown, this floating offshore wind farm includes multiple wind turbines 1. A mooring line 2 is connected to each wind turbine 1. One end of each mooring line 2 is connected to the wind turbine 1, and the other end is connected to a pile foundation 3. The pile foundation 3 is fixedly arranged in the sea area. Therefore, the wind turbine 1 is fixed through the mooring line 2 and the pile foundation 3. Here, the mooring line 2 can adopt the form of 3×1 or 3×2. Compared with the form of 3×2, the number of mooring lines 2 in the form of 3×1 is half, so the stability of the corresponding wind turbine 1 is slightly worse. However, when the number of mooring lines 2 increases, the construction cost and project volume also increase significantly. In actual situations, which form to adopt depends specifically on the sea conditions of the sea area where it is located. When the total number of mooring lines 2 connected to each wind turbine 1 is three, the number of rows of the multiple wind turbines 1 is even, and the number of wind turbines 1 in each row is even, the number of all pile foundations 3 satisfies formula (1), and the specific formula (1) is as follows:

[0058]

[0059] When the total number of mooring lines 2 connected to each wind turbine 1 is three, the number of rows of the multiple wind turbines 1 is even, and the number of wind turbines 1 in each row is odd, the number of all pile foundations 3 satisfies formula (2), and the specific formula (2) is as follows:

[0060]

[0061] When the total number of mooring lines 2 connected to each wind turbine 1 is three, and the number of rows of the multiple wind turbines 1 is odd, the number of all pile foundations 3 satisfies formula (3), and the specific formula (3) is as follows:

[0062] m = in + 2i + n + 2 Formula (3)

[0063] Among them, in Formulas (1) to (3), m is the total number of all the pile foundations 3, n is the total number of the wind turbines 1 in each row, 2i is the number of rows when the number of arranged rows is even, and 2i + 1 is the number of rows when the number of arranged rows is odd.

[0064] Specifically, referring to Figure 1 as shown, when single-row arrangement is adopted, according to Formula (3), the relational expression between the number m of the pile foundations 3 and the number n of the wind turbines 1 in each row is:

[0065] m = n + 2 Relational Expression (1)

[0066] In this arrangement form, the pile foundations 3 will be shared by 1, 2, or 3 of the mooring lines 2. As the number of the wind turbines 1 in the single-row arrangement increases, the number of the pile foundations 3 occupied by each wind turbine 1 on average will gradually decrease and approach 1.

[0067] Specifically, referring to Figure 2 as shown, when double-row arrangement is adopted and the number of the wind turbines 1 in each row is even, according to Formula (1), the relational expression between the number m of the pile foundations 3 and the number n of the wind turbines 1 in each row is:

[0068]

[0069] Referring to Figure 3 as shown, when double-row arrangement is adopted and the number of the wind turbines 1 in each row is odd, according to Formula (2), the relational expression between the number m of the pile foundations 3 and the number n of the wind turbines 1 in each row is:

[0070]

[0071] In the double-row arrangement form, the pile foundations 3 will be shared by 1, 2, 3, or 6 of the mooring lines 2, and as the number of the wind turbines 1 in each row increases, the number of the pile foundations 3 occupied by each wind turbine 1 on average will gradually decrease and approach 0.75. In addition, when the number of the wind turbines 1 in each row is odd, the sharing ratio of the pile foundations 3 is higher than that when it is even. Therefore, when the number of the wind turbines 1 in each row is odd, the pile foundations 3 are relatively more saved. When arranging in this form, it is preferred to consider that the number of the wind turbines 1 in each row is odd.

[0072] Specifically, referring to Figure 4 and Figure 5 as shown, when triple-row arrangement is adopted, regardless of whether the number of the wind turbines 1 in each row is even or odd, according to Formula (3), the relational expression between the number m of the pile foundations 3 and the number n of the wind turbines 1 in each row is:

[0073] m = 2n + 4 Relational Expression (4)

[0074] In the three - row arrangement form, the pile foundation 3 will be shared by 1, 2, 3, or 6 of the mooring lines 2. And as the number of the wind turbines 1 in each row increases, the number of the pile foundations 3 occupied by each single wind turbine 1 on average will gradually decrease, approaching 0.67. The situation is the same whether the number of the wind turbines 1 in each row is odd or even.

[0075] Specifically, referring to Figure 6 As shown, when a four - row arrangement is adopted and the number of the wind turbines 1 in each row is even, according to the formula (1), the relationship between the number m of the pile foundations 3 and the number n of the wind turbines 1 in each row is:

[0076]

[0077] Referring to Figure 7 As shown, when a four - row arrangement is adopted and the number of the wind turbines 1 in each row is odd, according to the formula (2), the relationship between the number m of the pile foundations 3 and the number n of the wind turbines 1 in each row is:

[0078]

[0079] In the four - row arrangement form, the pile foundation 3 will be shared by 1, 2, 3, or 6 of the mooring lines 2. And as the number of the wind turbines 1 in each row increases, the number of the pile foundations 3 occupied by each single wind turbine 1 on average will gradually decrease, approaching 0.63. In addition, when the number of the wind turbines 1 in each row is odd, the sharing ratio of the pile foundation 3 is higher than when it is even. Therefore, when the number of the wind turbines 1 in each row is odd, the pile foundation 3 is relatively more saved. When arranging in this form, it is preferred to consider that the number of the wind turbines 1 in each row is odd.

[0080] Therefore, generally speaking, when the number of rows and columns is odd, the number of the wind turbines 1 in each row has no influence on the number of the pile foundations 3 occupied by each single wind turbine 1 on average. When the number of rows and columns is even, when the number of the wind turbines 1 in each row is odd, the sharing ratio of the pile foundation 3 is higher than when it is even, and it is preferred. From the above analysis and formulas (1) - (3), as the number of rows and the number of the wind turbines 1 in each row increase, the number of the pile foundations 3 occupied by each single wind turbine 1 on average will gradually decrease, and finally can approach 0.5. The arrangement method of the wind turbines 1 and the pile foundations 3, while ensuring normal operation, reduces as much as possible the number of the pile foundations 3 occupied by each single wind turbine 1 on average, making the overall structure compact, not occupying too much sea area, and at the same time reducing as much as possible the number of the pile foundations 3, reducing the construction cost and the engineering quantity.

[0081] Further, the wind turbines 1 on each row are arranged at intervals according to a preset trajectory, which can be wavy or zigzag. Specifically, the wind turbines 1 on each row are arranged at staggered intervals in the front-back direction, so that the connection line of all the wind turbines 1 on this row is wavy or zigzag.

[0082] Further, for the convenience of construction and unified manufacturing, the distance between each pile foundation 3 and the adjacent wind turbine 1 is equal, and the distance between each adjacent wind turbine 1 is also equal, and they are arranged at regular intervals.

[0083] Further, the distance between adjacent wind turbines 1 is equal to the distance between the pile foundation 3 and the adjacent wind turbine 1. Therefore, an equilateral triangle is formed between two adjacent wind turbines 1 and the nearest pile foundation 3, and the connection line between six adjacent wind turbines 1 is a regular hexagon. In this arrangement form, the lengths of all the mooring lines 2 are equal.

[0084] Further, when the mooring line 2 adopts the form of 3×2, the total number of mooring lines 2 connected to each wind turbine 1 is six at this time. During actual connection, every two mooring lines 2 are in a group. One ends of these two mooring lines 2 are fixedly connected to the same position of the corresponding wind turbine 1, and the other ends are both connected to the corresponding pile foundation 3. The number of rows of the arrangement of multiple wind turbines 1 is not less than two rows, and the arrangement shape of multiple wind turbines 1 is a honeycomb structure. When arranged in a honeycomb structure, the distance between adjacent wind turbines 1 is times the ratio of the distance between the pile foundation 3 and the adjacent wind turbine 1. For specific reference, see Figure 8 and Figure 9 shown. In addition, the number of rows of the arrangement of multiple wind turbines 1 can also be a single row. However, when it is a single row, its honeycomb structure is not obvious, and the number of pile foundations 3 occupied by each wind turbine 1 on average is relatively high compared to multiple rows. For specific reference, see Figure 10 shown.

[0085] Specifically, in the above arrangement form, there will be a situation where 1 or 2 mooring lines 2 share the pile foundation 3, and as the number of arrangement rows increases, the proportion of the situation where 2 mooring lines 2 share the pile foundation 3 is higher. Theoretically, in the limit case of this honeycomb structure arrangement form, the number of pile foundations 3 occupied by each wind turbine 1 is 3. Compared with the wind turbine layout form that uses the pile foundation 3 alone, the number of pile foundations 3 is nearly reduced by 50%.

[0086] Further, see Figure 11As shown in the figure, when the total number of the mooring lines 2 connected to each of the wind turbines 1 is six, at least six of the wind turbines 1 are connected to the corresponding mooring lines 2 and the pile foundations 3 to form a wind power generating unit 4, and each of the wind power generating units 4 is in a snowflake structure. Specifically, the snowflake structure includes 18 of the pile foundations 3 and 36 of the mooring lines 2. The connection lines of 6 of the wind turbines 1 form a regular hexagon. Among them, 12 of the pile foundations 3 are dispersed in pairs on the periphery of the formed regular hexagon, and the remaining 6 of the pile foundations 3 are dispersed inside the formed regular hexagon. Each of the wind turbines 1 is connected to six of the mooring lines 2, thus forming the snowflake structure. In this snowflake structure, each of the pile foundations 3 fixes two of the mooring lines 2, and the number of the pile foundations 3 occupied by each of the wind turbines 1 is 3. Compared with the arrangement form of the wind turbines 1 using the pile foundations 3 alone, the number of the pile foundations 3 is reduced by 50%.

[0087] Furthermore, as shown in Figures 12 - 14 the figure, the snowflake structure, as an independent unit, can be arranged in a variety of different construction forms according to actual requirements: multiple of the wind power generating units 4 can be regularly arranged horizontally and / or vertically. In this form, the number of the pile foundations 3 shared by two adjacent wind power generating units 4 is 1 to 2. In such a regular arrangement form, except that 2 of the mooring lines 2 share 1 of the pile foundations 3, some of the pile foundations 3 also have the situation of sharing 1 of the pile foundations 3 by 4 of the mooring lines 2, which will further reduce the number of the pile foundations 3 occupied by each of the wind turbines 1, and the overall average is less than 3; multiple of the wind power generating units 4 can be continuously and regularly arranged, that is, the wind power generating units 4 are closely arranged. The number of the pile foundations 3 shared by two adjacent wind power generating units 4 is 2 to 6. In such a regular arrangement form, some of the pile foundations 3 will have the situation of sharing 1 of the pile foundations 3 by 4 or 6 of the mooring lines 2. The number of the pile foundations 3 occupied by each of the wind turbines 1 is 18 / 7, that is, 2.57. As the number of the arranged wind turbines 1 gradually increases, this value gradually approaches 2.5; multiple of the wind power generating units 4 can also be arranged arbitrarily, that is, there is no fixed rule, but it must be ensured that the number of the pile foundations 3 shared by two adjacent wind power generating units 4 is at least 1. In such a regular arrangement form, the wind power generating units 4 are used as the smallest arrangement unit and are spliced irregularly to meet the requirements of various environmental conditions. Some of the pile foundations 3 will have the situation of sharing 1 of the pile foundations 3 by 4 of the mooring lines 2. Therefore, the average number of the pile foundations 3 occupied by each of the wind turbines 1 is less than 3.

[0088] Specifically, in the above several arrangement forms, the pile foundation 3 will be shared by two or more of the mooring lines 2. The higher the proportion of the situation where the pile foundation 3 is shared by more than two mooring lines 2, the lower the number of pile foundations 3 occupied by each wind turbine 1 on average. In theory, in the extreme case of this snowflake structure arrangement, the number of pile foundations 3 occupied by each wind turbine 1 is 2.5. Compared with the arrangement of the wind turbines 1 using the pile foundation 3 alone, the number of pile foundations 3 is reduced by nearly 58%.

[0089] The present application also provides an arrangement strategy for a floating offshore wind farm, which is used to implement the above floating offshore wind farm. The specific steps include:

[0090] Set a plurality of spaced-apart wind turbines 1 and pile foundations 3 in the mooring area, and set mooring lines 2 between adjacent wind turbines 1 and pile foundations 3;

[0091] Set the total number of mooring lines 2 connected to each wind turbine 1 to three, set the number of rows of the plurality of wind turbines 1 to an even number, set the number of each row of wind turbines 1 to an even number, so that the number of all pile foundations 3 satisfies formula (1); or,

[0092] Set the total number of mooring lines 2 connected to each wind turbine 1 to three, set the number of rows of the plurality of wind turbines 1 to an even number, set the number of each row of wind turbines 1 to an odd number, so that the number of all pile foundations 3 satisfies formula (2); or,

[0093] Set the total number of mooring lines 2 connected to each wind turbine 1 to three, set the number of rows of the plurality of wind turbines 1 to an odd number, so that the number of all pile foundations 3 satisfies formula (3); where,

[0094]

[0095]

[0096] m = in + 2i + n + 2 Formula (3)

[0097] In formulas (1) to (3), m is the number of all pile foundations 3, n is the number of each row of wind turbines 1, 2i is the number of rows when the number of rows is even, and 2i + 1 is the number of rows when the number of rows is odd.

[0098] Specifically, this arrangement strategy can save the number of the pile foundations 3 compared with the individual setting scheme of the floating wind turbines in the wind farm in the related art, effectively reduce the cost of manufacturing and constructing the pile foundations 3, save the installation operation time of the pile foundations 3, thereby reducing the total construction cost of the floating offshore wind turbine wind farm. In addition, the arrangement mode of the wind turbines 1 and the pile foundations 3 in this arrangement strategy can minimize the number of the pile foundations 3 occupied by each wind turbine 1 on average under the condition of ensuring normal operation, making the overall structure compact and not occupying too much sea area.

[0099] Further, the steps of this arrangement strategy further include: arranging the wind turbines 1 on each row at intervals according to a preset track, and the preset track is a wavy shape or a zigzag shape.

[0100] Further, the steps of this arrangement strategy further include: setting the distance between each pile foundation 3 and the adjacent wind turbine 1 to be equal, and also setting the distance between every two adjacent wind turbines 1 to be equal.

[0101] Further, the steps of this arrangement strategy further include: setting the distance between adjacent wind turbines 1 to be equal to the distance between the pile foundation 3 and the adjacent wind turbine 1.

[0102] Further, the steps of this arrangement strategy further include: setting the total number of the mooring lines 2 connected to each pile foundation 3 to be one, two, three or six.

[0103] Further, the steps of this arrangement strategy further include: when the total number of the mooring lines 2 connected to each wind turbine 1 is six, setting the number of rows of the arranged wind turbines 1 to be not less than two rows, so that the arranged shape of the wind turbines 1 is a honeycomb structure.

[0104] Further, the steps of this arrangement strategy further include: when the total number of the mooring lines 2 connected to each wind turbine 1 is six, connecting at least six wind turbines 1 with the corresponding mooring lines 2 and pile foundations 3 to form a wind turbine unit 4, and making each wind turbine unit 4 be a snowflake structure.

[0105] Further, the steps of this arrangement strategy further include: multiple wind turbine units 4 can be arranged regularly along the horizontal direction and / or the vertical direction, and the number of the shared pile foundations 3 between two adjacent wind turbine units 4 is 1 - 2; or, multiple wind turbine units 4 can also be arranged continuously and regularly, and the number of the shared pile foundations 3 between two adjacent wind turbine units 4 is 2 - 6; or, multiple wind turbine units 4 can also be arranged arbitrarily, and the number of the shared pile foundations 3 between two adjacent wind turbine units 4 is at least 1.

[0106] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0107] It should be noted that in the present application, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0108] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A floating offshore wind farm, characterized in that, It includes: Multiple wind turbines (1), with a mooring line (2) connected to each wind turbine (1). One end of the mooring line (2) is connected to the wind turbine (1), and the other end is connected to a pile foundation (3). The total number of mooring lines (2) connected to each wind turbine (1) is six. At least six wind turbines (1) are connected to the corresponding mooring lines (2) and pile foundations (3) to form a wind turbine unit (4). Each wind turbine unit (4) is in a snowflake structure, which includes 18 pile foundations (3) and 36 mooring lines (2). The connection lines of 6 wind turbines (1) form a regular hexagon. Among them, 12 pile foundations (3) are dispersed in pairs on the periphery of the formed regular hexagon, and the remaining 6 pile foundations (3) are dispersed inside the formed regular hexagon. Each pile foundation (3) fixes two mooring lines (2), thus forming the snowflake structure.

2. A floating offshore wind turbine farm according to claim 1, wherein: Multiple wind turbine units (4) are arranged regularly along the transverse and / or longitudinal directions, and the number of shared pile foundations (3) between two adjacent wind turbine units (4) is 1 to 2. Multiple wind turbine units (4) are arranged continuously and regularly, and the number of shared pile foundations (3) between two adjacent wind turbine units (4) is 2 to 6. Multiple wind turbine units (4) are arranged arbitrarily, and the number of shared pile foundations (3) between two adjacent wind turbine units (4) is at least 1.

3. A layout strategy for a floating offshore wind farm, which is used to implement the floating offshore wind farm as described in claim 1, characterized in that, Its steps include: Set multiple spaced-apart wind turbines (1) and pile foundations (3) respectively in the mooring area, and set mooring lines (2) between adjacent wind turbines (1) and pile foundations (3). Set the total number of mooring lines (2) connected to each wind turbine (1) to six, and connect at least six wind turbines (1) to the corresponding mooring lines (2) and pile foundations (3) to form a wind turbine unit (4), so that each wind turbine unit (4) is in a snowflake structure, which includes 18 pile foundations (3) and 36 mooring lines (2). The connection lines of 6 wind turbines (1) form a regular hexagon. Among them, 12 pile foundations (3) are dispersed in pairs on the periphery of the formed regular hexagon, and the remaining 6 pile foundations (3) are dispersed inside the formed regular hexagon. Each pile foundation (3) fixes two mooring lines (2), thus forming the snowflake structure.

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