CN119527497A - Floating offshore wind power foundation suitable for water depth suspension ballast type and use method - Google Patents
Floating offshore wind power foundation suitable for water depth suspension ballast type and use method Download PDFInfo
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- CN119527497A CN119527497A CN202411739651.2A CN202411739651A CN119527497A CN 119527497 A CN119527497 A CN 119527497A CN 202411739651 A CN202411739651 A CN 202411739651A CN 119527497 A CN119527497 A CN 119527497A
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Abstract
The invention relates to a ballast floating type offshore wind power foundation adapting to water depth suspension and a use method thereof, belonging to the technical field of floating type offshore wind power generation, wherein the wind power foundation comprises a three-upright semi-submersible foundation, a mooring system and a control system, the three-upright semi-submersible foundation comprises three vertical uprights, a supporting rod and a ballast caisson, the ballast caisson is connected with a sliding rail arranged on the side wall of the vertical uprights through a sliding rope, so that the ballast caisson moves up and down relative to the vertical uprights, and the position of the ballast caisson is adjusted through the control system so as to adjust the gravity center position and draft of the foundation, so as to adapt to different environmental conditions, and ensure stability and anti-capsizing capability; the use method comprises the steps of monitoring environmental conditions, calculating overturning moment, calculating anti-overturning moment, adjusting the depth of the ballast caisson, recording and analyzing data, and ensuring that the gravity center and the floating center of the foundation are kept at proper positions by calculating the depth of the overturning moment needed to move the ballast caisson in a reverse way, so that the risk of basic overturning is reduced.
Description
Technical Field
The invention relates to the technical field of floating type offshore wind power generation, in particular to a floating type offshore wind power foundation adapting to water depth suspension ballast and a use method thereof.
Background
In recent years, with the technological progress at home and abroad, wind power generation has a trend towards deep sea, and in deep sea areas, floating offshore wind power foundations are widely focused, and three common types are Spar columns, TLP tension legs and semi-submersibles.
The Spar column type foundation has the advantages of simple design and manufacturing process, few movable parts, difficult construction and installation, large overall weight and large draft of the Spar column type foundation in order to meet the stability requirement, and limits the feasibility of returning the Spar column type foundation to wharf maintenance.
The TLP tension leg type steel has less steel consumption and less movable parts, and can be installed and debugged on land, thereby avoiding various problems of offshore installation. However, the TLP tension leg foundation balances the excessive buoyancy of the floating body upwards through the vertical downward mooring tension, so that the mooring and anchoring system is extremely stressed and has great risk, the natural frequency of the TLP tension leg foundation is easy to resonate with the frequency of sea waves, structural fatigue and damage are caused, although the TLP tension leg foundation can be installed and debugged on land, the offshore installation process is still complex, precise tension control and anchoring systems are required, the installation process is very challenging, the technology is relatively immature, and a specially-customized installation ship is required.
In comparison, semi-submersible offshore wind power foundation has significant advantages in terms of stability and technical maturity. The semi-submersible floating type wind turbine foundation has the advantages of good stability, flexible movement, reliable operation, wide applicable water depth range, small draft, large water plane, portability, repeated utilization and convenient installation, can be towed to a wind farm after near shore debugging is finished, is positioned by utilizing an anchor chain, and is one of the foundations with the most development prospect in offshore wind energy development in the future. However, the semi-submersible offshore wind power foundation is stable depending on its buoyancy, the buoyancy and stability of the foundation may be affected as the water depth increases, particularly in extreme weather conditions, the effects of waves and wind forces may cause the foundation to float and tilt, and the design of the semi-submersible foundation is usually designed for specific working environmental conditions, so its adaptability may be limited in different water depths or extreme environments.
Therefore, the semi-submersible offshore wind power foundation which can effectively adapt to different water depths or environments and has good stability and the using method are developed, and the semi-submersible offshore wind power foundation is a difficult problem in the development of the current ocean power generation technology.
Disclosure of Invention
Aiming at overcoming the defects of the technical background, the invention aims to provide a ballast type floating offshore wind power foundation suitable for water depth suspension and a using method thereof.
The aim of the invention can be achieved by the following technical scheme:
The suspended ballast type floating offshore wind power foundation suitable for the water depth comprises a three-upright semi-submersible foundation for supporting a draught fan, a mooring system and a control system for automatically controlling the wind power foundation, wherein the three-upright semi-submersible foundation comprises three vertical uprights, a supporting rod and a ballast caisson, the three vertical uprights are equally spaced to form an equilateral triangle, two ends of the supporting rod are respectively connected with the adjacent vertical uprights, the ballast caisson is arranged at the middle point of the equilateral triangle and is connected with a sliding rail arranged on the side wall of the vertical uprights through a sliding rope, the control system controls the sliding rope to slide up and down relative to the sliding rail so that the ballast caisson moves up and down relative to the vertical uprights, one end of the mooring rope is fixedly arranged at the bottom of the vertical uprights, the other end of the mooring rope is connected with the mooring anchor, and the mooring anchor is anchored at the sea bottom.
As a preferable technical scheme of the invention, the bottom of the ballast caisson is provided with a heave plate with self-adaptive telescopic width.
As a preferable technical scheme of the invention, the ballast caisson adopts a concrete cylinder structure, and the control system controls the moving distance of the sliding rope on the sliding rail so as to control the moving distance of the ballast caisson relative to the vertical column, thereby completing the gravity center adjustment of the three-column semi-submerged foundation.
As a preferable technical scheme of the invention, the ballast caisson adopts a hydraulic chamber structure, the hydraulic chamber is filled with or discharged from seawater through a hydraulic pump electrically connected with the control system so as to change the weight and buoyancy of the hydraulic chamber, the ballast caisson can move up and down relative to the vertical upright post, and pressure sensors are respectively arranged in the hydraulic chamber and on the outer wall of the hydraulic chamber and are respectively used for monitoring the depth of the seawater and the change of the water pressure in the hydraulic chamber in real time.
As a preferable technical scheme of the invention, the mooring rope adopts a catenary steel anchor chain, and the mooring anchor adopts a suction drum anchor or a caisson anchor.
As a preferable technical scheme of the invention, the stay bar comprises a horizontal stay bar and an inclined stay bar, the top end of each vertical stand column is connected with the top end of the adjacent vertical stand column through the horizontal stay bar, the bottom end of each vertical stand column is connected with the bottom end of the adjacent vertical stand column through the horizontal stay bar, and the bottom end of each vertical stand column is connected with the top end of the adjacent vertical stand column through the inclined stay bar.
As a preferable technical scheme of the invention, the control system comprises a monitoring subsystem and a control subsystem, wherein the monitoring subsystem monitors wind speed and wind direction information in real time through an ultrasonic wind speed and wind direction sensor arranged on the three-upright semi-submerged foundation and feeds the information back to the control system, the control system analyzes the wind speed and wind direction information and sends dynamic control commands to the control subsystem, and the control subsystem adjusts the distance between the ballast caisson and the vertical upright according to the commands.
The invention relates to a use method of a suspension ballast type floating offshore wind power foundation adapting to water depth, which is used for the suspension ballast type floating offshore wind power foundation adapting to water depth and comprises the following steps of:
S1, monitoring environmental conditions, namely monitoring wind speed and wind direction around a wind power foundation in real time by utilizing an ultrasonic wind speed and wind direction sensor, and transmitting monitoring data to the control system;
S2, calculating the overturning moment, namely, calculating the wind power on the wind power foundation by the control system according to the monitoring data, and calculating the overturning moment M t generated by the wind power based on the action point of the wind power and the gravity center position of the wind power foundation, wherein the following relational expression is satisfied:
Mt＝Fw·d
Wherein F w is wind power, ρ is air density, A is wind power acting area, namely projection area of fan blade, C d is wind resistance coefficient, V is wind speed, d is horizontal distance from wind power acting point to wind power basic gravity center;
S3, calculating anti-overturning moment M a according to the gravity of the wind power foundation and the submerged depth of the ballast caisson, wherein the anti-overturning moment M a meets the following relation:
Ma=μ·W·h
Wherein W is the gravity of the wind power foundation, h is the vertical distance from the gravity center of the wind power foundation to the bottom of the wind power foundation, mu is the safety coefficient, and the value is smaller than 1.0;
And S4, adjusting the depth of the ballast caisson, wherein the control system analyzes and judges whether the wind power foundation is safe or not according to the calculation results of the steps S2 and S3, and when the wind power foundation is judged to be unsafe in the process of M t≥Ma, the control system adjusts the depth of the ballast caisson through a sliding rope and a sliding rail until M t＜Ma, and the depth h' of the ballast caisson after adjustment meets the following relation:
h'=h+dbox
Ma′=μ·W·h′
Ma′＞Mt
Wherein d box is the depth to be increased of the ballast caisson, and M a 'is the anti-overturning moment of the wind power foundation after the depth h' of the ballast caisson is adjusted;
And S5, data recording and analysis, namely archiving all monitoring data, calculation results and adjustment records so as to analyze and optimize the design and operation of the wind power foundation later, and identifying potential risk factors and providing references for future wind power projects through data analysis.
As a preferred technical solution of the present invention, the overturning moment in step S2 further includes an overturning moment generated by a wave load, which satisfies the following relation:
Ms＝Mt+Mw
Mw=ρ'·g·H·A'·d'
Wherein M s is the total overturning moment born by the wind power foundation, M w is the overturning moment generated by wave load, ρ ' is sea water density, A ' is wave action area, H is wave height, and d ' is the horizontal distance from the wave load action point to the gravity center of the wind power foundation.
As a preferable technical scheme of the invention, the safety coefficient mu takes a value of 0.6.
In summary, the beneficial effects of the invention are as follows:
According to the invention, the ballast caisson with the depth capable of being adjusted according to real-time marine environmental conditions is arranged in the wind power foundation, so that the wind power foundation can maintain optimal stability and anti-capsizing capability under various conditions, the wave, tide and wind power in a deep sea area are changed greatly, the load and dynamic response of the wind power foundation are different under different water depths and environmental conditions, the buoyancy and stability of the wind power foundation are improved by adjusting the depth of the ballast caisson, the wind power foundation can adapt to wider water depth changes, especially in environments with larger fluctuation or stronger wind power, the inadaptability caused by a fixed structure is avoided, the vibration amplitude of the foundation structure under the action of waves and wind power is reduced, so that the fatigue damage of the structure is reduced, meanwhile, the dynamic adjusting mechanism not only improves the adaptability and safety of the wind power foundation, but also can reduce excessive conservation in design and construction, avoid excessive complicated structural design, such as in shallower water areas, without the oversized ballast caisson, but also the stability can be increased by increasing the depth of the caisson, so that resources can be reasonably configured according to actual needs, and the construction cost is saved.
Through calculating the moment of overturning, the gravity center and the floating center of the wind power foundation can be kept at the proper positions, whether the wind power foundation can be overturned due to external waves, wind power or other factors can be effectively predicted, measures are taken in advance to adjust the sinking depth, the risk of overturning the wind power foundation is reduced, and the wind power foundation can be safely operated under various environmental conditions.
Drawings
FIG. 1 is a schematic illustration of a three-column semi-submersible foundation of the present invention;
FIG. 2 is a schematic illustration of a suspended ballasted floating offshore wind power foundation of the present invention adapted for water depth;
FIG. 3 is a flow chart of a method of using a suspended ballasted floating offshore wind power foundation of the present invention to accommodate water depths;
The foundation comprises a 1-three-upright semi-submersible foundation, 11-vertical uprights, 12-stay bars, 13-ballast caisson, 14-sliding ropes, 15-sliding rails, 2-mooring systems, 21-mooring ropes and 22-mooring anchors.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the particular embodiments presented herein are illustrative and explanatory only and are not restrictive of the invention.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but that other embodiments of the invention and variations thereof are possible, and therefore the scope of the invention is not limited by the specific examples disclosed below.
As shown in fig. 1 to 2, the suspended ballast type floating offshore wind power foundation adapting to the water depth comprises a three-column semi-submerged foundation 1 for supporting a draught fan, a mooring system 2 and a control system (not shown in the drawings) for automatically controlling the wind power foundation, wherein the three-column semi-submerged foundation 1 comprises three vertical columns 11, supporting rods 12 and a ballast caisson 13, the three vertical columns 11 are equidistantly surrounded into an equilateral triangle, two ends of the supporting rods 12 are respectively connected with the adjacent vertical columns 11, the ballast caisson 13 is arranged at the middle point of the equilateral triangle and is connected with a sliding rail 15 arranged on the side wall of the vertical columns 11 through sliding ropes 14, the control system controls the sliding ropes 14 to slide up and down relative to the sliding rails 15 so that the ballast caisson 13 moves up and down relative to the vertical columns 11, one end of the mooring system 2 comprises mooring ropes 21 and mooring anchors 22 which are in one-to-one correspondence with the vertical columns 11, one end of the mooring ropes 21 is fixedly arranged at the bottom of the vertical columns 11, the other end of the mooring ropes 22 are connected with the mooring anchors 22, and the mooring anchors 22 are fixedly anchored at the bottom.
The control system is used for adjusting the up-and-down movement of the ballast caisson 13 relative to the vertical upright post 11, so that the gravity center position and the draft of the foundation can be effectively adjusted, the stability of the foundation can be adjusted in real time according to different environmental conditions, such as wave, wind speed, tide change and the like, and the wind power foundation can be ensured to maintain optimal stability and anti-capsizing capability under various conditions. Especially in deep water and dynamic environments, up-and-down adjustment of the ballast caisson 13 can optimize the buoyancy and stability of the wind power foundation, avoid instability of the structure due to excessive or insufficient buoyancy, and reduce the risk of damage in extreme weather or under severe sea conditions. Secondly, by adjusting the depth of the ballast caisson 13 up and down, not only the stability of the wind power foundation can be adjusted, but also the stress condition of the mooring system 2 can be optimized, the mooring cable 21 and the anchoring system are the keys for ensuring the stability of the floating foundation, and by controlling the position of the ballast caisson 13, the mechanical state of the mooring system 2 can be optimized under different sea conditions, so that the stress of the mooring cable 21 is more uniform, the overload or instability of the mooring system 2 is avoided, and the reliability of the whole system is improved.
As a preferred embodiment of the invention, the bottom of the ballast caisson 13 is provided with heave plates of adaptive telescopic width.
The self-adaptive telescopic width function of the heave plate can be automatically adjusted according to the change of sea waves to provide proper hydrodynamic damping, pneumatic thrust generated by a wind turbine is helped to be counteracted, the capability of a wind power foundation for resisting unstable air flow in a deep sea area is enhanced, the influence of sea current on the ballast caisson 13 is effectively lightened, the heave and heave movement amplitude of a platform is reduced, the ballast caisson 13 can be kept in a more stable dynamic balance state, the swing and uneven stress phenomena of the wind power foundation are further reduced, and the performance and stability of the wind power foundation in a complex marine environment are improved.
As a preferred embodiment of the invention, the ballast caisson 13 adopts a concrete cylinder structure, and the control system controls the moving distance of the sliding rope 14 on the sliding rail 15, thereby controlling the moving distance of the ballast caisson 13 relative to the vertical upright post 11, and completing the gravity center adjustment of the three-upright-post semi-submersible foundation 1.
The concrete cylindrical structure is stable through the balance of the self weight and the buoyancy of water, the concrete material has good compressive strength and durability, can bear larger external pressure and environmental influence, is suitable for being used in severe environments such as ocean, has larger self weight, has stronger buoyancy resistance in water, can effectively keep the stability of the caisson, drives the moving distance of the sliding rope 14 on the sliding rail 15 through the control system, further drives the ballast caisson 13 to move up and down, has simple working mechanism and structural design, reduces complex mechanical parts, has low failure rate, has relatively less maintenance and repair requirements, further reduces the cost of long-term operation, can stably operate under different environmental conditions, has strong adaptability, and is suitable for various application scenes.
As a preferred embodiment of the present invention, the ballast tank 13 adopts a hydraulic chamber structure, the hydraulic chamber is filled with seawater or discharged from the inside of the hydraulic chamber through a hydraulic pump electrically connected with a control system, so as to change the weight and buoyancy of the hydraulic chamber, and complete the up-and-down movement of the ballast tank 13 relative to the vertical column 11, and the inside and the outer wall of the hydraulic chamber are provided with pressure sensors for respectively monitoring the depth of the seawater and the change of the pressure of the water in the hydraulic chamber in real time.
The buoyancy of the ballast caisson 13 is changed by adjusting the liquid in the hydraulic tank, the weight of the ballast caisson 13 is adjusted so as to control the depth of the ballast caisson 13 in water, and when the ballast caisson 13 needs to be submerged to a deeper depth to provide higher stability, the submerged depth of the ballast caisson 13 is deepened by increasing the water amount in the hydraulic tank, so that the wind power platform always maintains an ideal stable state. The position of the ballast caisson 13 can be accurately controlled through the control of the hydraulic pump, so that the ballast caisson is suitable for application scenes requiring high-precision positioning, can finish position adjustment in a short time, and is suitable for application in a dynamic environment.
As a preferred embodiment of the present invention, mooring lines 21 are catenary steel chains and mooring anchors 22 are suction drum anchors or caisson anchors.
As a preferred embodiment of the present invention, the stay 12 includes a horizontal stay and an inclined stay, the top end of each vertical column 11 is connected with the top end of the adjacent vertical column 11 through the horizontal stay, the bottom end of each vertical column 11 is connected with the bottom end of the adjacent vertical column 11 through the horizontal stay, and the bottom end of each vertical column 11 is connected with the top end of the adjacent vertical column 11 through the inclined stay.
As a preferred embodiment of the present invention, the control system comprises a monitoring subsystem and a control subsystem, wherein the monitoring subsystem monitors wind speed and wind direction information in real time through an ultrasonic wind speed and wind direction sensor arranged on the three-upright semi-submersible foundation 1 and feeds back the information to the control system, the control system analyzes the wind speed and wind direction information and sends out dynamic control commands to the control subsystem, and the control subsystem adjusts the distance between the ballast caisson 13 and the vertical upright 11 according to the commands.
As shown in fig. 3, the method for using the suspended ballast type floating offshore wind power foundation adapting to the water depth comprises the following steps of:
s1, monitoring environmental conditions, namely monitoring wind speed and wind direction around a wind power foundation in real time by utilizing an ultrasonic wind speed and wind direction sensor, and transmitting monitoring data to a control system;
S2, calculating the overturning moment, namely, calculating wind power on the wind power foundation by the control system according to the monitoring data, and calculating the overturning moment M t generated by the wind power based on the action point of the wind power and the gravity center position of the wind power foundation, wherein the following relational expression is satisfied:
Mt＝Fw·d
Wherein F w is wind power, ρ is air density, A is wind power acting area, namely projection area of fan blade, C d is wind resistance coefficient, V is wind speed, d is horizontal distance from wind power acting point to wind power basic gravity center;
S3, calculating anti-overturning moment M a according to the gravity of the wind power foundation and the submerged depth of the ballast caisson 13, wherein the following relation is satisfied:
Ma=μ·Wxh
wherein W is the gravity of the wind power foundation, h is the vertical distance from the gravity center of the wind power foundation to the bottom of the wind power foundation, mu is the safety coefficient, and the value is 0.6;
S4, adjusting the depth of the ballast caisson 13, wherein the control system analyzes and judges whether the wind power foundation is safe according to the calculation results of the steps S2 and S3, and when the wind power foundation is judged to be unsafe in the process of M t≥Ma, the control system adjusts the depth of the ballast caisson 13 through the sliding rope 14 and the sliding rail 15 until M t＜Ma, and the adjusted depth h' of the ballast caisson 13 meets the following relation:
h'=h+dbox
Ma′=μ·W·h′
Ma′＞Mt
Wherein d box is the depth to be increased for ballasting the caisson 13, and M a 'is the anti-overturning moment of the wind power foundation after the ballasting the caisson 13 to the depth h';
And S5, data recording and analysis, namely archiving all monitoring data, calculation results and adjustment records so as to facilitate subsequent analysis and optimization of wind power foundation design and operation, and identifying potential risk factors and providing references for future wind power projects through data analysis.
According to the wind power foundation and the wind power foundation control method, the overturning moment is calculated, so that the gravity center and the floating center of the wind power foundation can be kept at the proper positions, whether the wind power foundation can be overturned due to external waves, wind power or other factors is effectively predicted, measures are taken in advance to adjust the sinking depth, the risk of overturning the wind power foundation is reduced, and the wind power foundation can be safely operated under various environmental conditions. By accurately calculating the desired sinking depth, the possibility of over-design can be reduced, avoiding unnecessary over-sinking of the caisson, and thus reducing construction and maintenance costs.
As a preferred embodiment of the present invention, the overturning moment in step S2 further includes an overturning moment generated by the wave load, satisfying the following relation:
Ms＝Mt+Mw
Mw=ρ'·g·H·A'·d'
Wherein M s is the total overturning moment born by the wind power foundation, M w is the overturning moment generated by wave load, ρ ' is the sea water density, A ' is the wave action area, H is the wave height, and d ' is the horizontal distance from the wave load action point to the gravity center of the wind power foundation.
It should be understood that the foregoing embodiments are merely illustrative of one or more embodiments of the present invention, and that many other embodiments and variations thereof may be made by those skilled in the art without departing from the scope of the invention.
Claims (10)
1. The marine wind power foundation is characterized by comprising a three-upright semi-submersible foundation for supporting a fan, a mooring system and a control system for automatically controlling the wind power foundation, wherein the three-upright semi-submersible foundation comprises three vertical uprights, a supporting rod and a ballast caisson, the three vertical uprights are equally spaced to form an equilateral triangle, two ends of the supporting rod are respectively connected with the adjacent vertical uprights, the ballast caisson is arranged at the middle point of the equilateral triangle and is connected with a sliding rail arranged on the side wall of the vertical uprights through a sliding rope, the control system controls the sliding rope to slide up and down relative to the sliding rail so that the ballast caisson moves up and down relative to the vertical uprights, one end of the mooring rope is fixedly arranged at the bottom of the vertical uprights, the other end of the mooring rope is connected with the mooring anchor, and the mooring anchor is anchored to the sea bottom.
2. The floating offshore wind power foundation of adaptive water depth suspension ballast type of claim 1, wherein the bottom of the ballast caisson is provided with a heave plate with adaptive telescopic width.
3. The floating offshore wind power foundation adapting to water depth suspension ballast type according to claim 1, wherein the ballast caisson is of a concrete cylinder type structure, and the control system controls the moving distance of the sliding rope on the sliding rail so as to control the moving distance of the ballast caisson relative to the vertical column, so that the gravity center adjustment of the three-column semi-submerged foundation is completed.
4. The floating offshore wind power foundation of the adaptive water depth suspension ballast type of claim 1, wherein the ballast caisson is of a hydraulic chamber structure, the hydraulic chamber is filled with or discharged from seawater through a hydraulic pump electrically connected with the control system, so as to change the weight and the buoyancy of the hydraulic chamber, the ballast caisson can move up and down relative to the vertical upright post, and pressure sensors are arranged in the hydraulic chamber and on the outer wall of the hydraulic chamber, and are respectively used for monitoring the depth of the seawater and the change of the water pressure in the hydraulic chamber in real time.
5. The adapted-to-depth suspended ballasted floating offshore wind power foundation of claim 1, wherein said mooring lines are catenary steel anchor chains and said mooring anchors are suction drum anchors or caisson anchors.
6. The floating offshore wind power foundation adapting to water depth suspension ballast type according to claim 1, wherein the stay bars comprise horizontal stay bars and inclined stay bars, the top end of each vertical upright post is connected with the top end of the adjacent vertical upright post through the horizontal stay bars, the bottom end of each vertical upright post is connected with the bottom end of the adjacent vertical upright post through the horizontal stay bars, and the bottom end of each vertical upright post is connected with the top end of the adjacent vertical upright post through the inclined stay bars.
7. The adaptive deep water suspension ballasted floating offshore wind power foundation of claim 1, wherein the control system comprises a monitoring subsystem and a control subsystem, the monitoring subsystem monitors wind speed and wind direction information in real time through an ultrasonic wind speed and wind direction sensor arranged on the three-column semi-submerged foundation and feeds the information back to the control system, the control system analyzes the wind speed and wind direction information and sends dynamic control commands to the control subsystem, and the control subsystem adjusts the distance between the ballast caisson and the vertical column according to the commands.
8. A method of using a water depth adapted suspended ballast floating offshore wind power foundation, characterized in that it is used for a water depth adapted suspended ballast floating offshore wind power foundation according to any one of claims 1-7, said method of using comprising the steps of:
S1, monitoring environmental conditions, namely monitoring wind speed and wind direction around a wind power foundation in real time by utilizing an ultrasonic wind speed and wind direction sensor, and transmitting monitoring data to the control system;
S2, calculating the overturning moment, namely, calculating the wind power on the wind power foundation by the control system according to the monitoring data, and calculating the overturning moment M t generated by the wind power based on the action point of the wind power and the gravity center position of the wind power foundation, wherein the following relational expression is satisfied:
Mt＝Fw·d
Wherein F w is wind power, ρ is air density, A is wind power acting area, namely projection area of fan blade, C d is wind resistance coefficient, V is wind speed, d is horizontal distance from wind power acting point to wind power basic gravity center;
S3, calculating anti-overturning moment M a according to the gravity of the wind power foundation and the submerged depth of the ballast caisson, wherein the anti-overturning moment M a meets the following relation:
Ma=μ·W·h
Wherein W is the gravity of the wind power foundation, h is the vertical distance from the gravity center of the wind power foundation to the bottom of the wind power foundation, mu is the safety coefficient, and the value is smaller than 1.0;
And S4, adjusting the depth of the ballast caisson, wherein the control system analyzes and judges whether the wind power foundation is safe or not according to the calculation results of the steps S2 and S3, and when the wind power foundation is judged to be unsafe in the process of M t≥Ma, the control system adjusts the depth of the ballast caisson through a sliding rope and a sliding rail until M t＜Ma, and the depth h' of the ballast caisson after adjustment meets the following relation:
h'=h+dbox
Ma′=μ·W·h′
Ma′＞Mt
Wherein d box is the depth to be increased of the ballast caisson, and M a 'is the anti-overturning moment of the wind power foundation after the depth h' of the ballast caisson is adjusted;
And S5, data recording and analysis, namely archiving all monitoring data, calculation results and adjustment records so as to analyze and optimize the design and operation of the wind power foundation later, and identifying potential risk factors and providing references for future wind power projects through data analysis.
9. The method of claim 8, wherein the overturning moment in step S2 further comprises an overturning moment generated by wave load, and the following relation is satisfied:
Ms＝Mt+Mw
Mw=ρ'·g·H·A'·d'
Wherein M s is the total overturning moment born by the wind power foundation, M w is the overturning moment generated by wave load, ρ ' is sea water density, A ' is wave action area, H is wave height, and d ' is the horizontal distance from the wave load action point to the gravity center of the wind power foundation.
10. The method for using the ballast type floating offshore wind power foundation adapting to water depth suspension according to claim 8, wherein the safety coefficient mu takes a value of 0.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202411739651.2A CN119527497A (en) | 2024-11-29 | 2024-11-29 | Floating offshore wind power foundation suitable for water depth suspension ballast type and use method |
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| CN202411739651.2A CN119527497A (en) | 2024-11-29 | 2024-11-29 | Floating offshore wind power foundation suitable for water depth suspension ballast type and use method |
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| CN119527497A true CN119527497A (en) | 2025-02-28 |
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| CN202411739651.2A Pending CN119527497A (en) | 2024-11-29 | 2024-11-29 | Floating offshore wind power foundation suitable for water depth suspension ballast type and use method |
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2024
- 2024-11-29 CN CN202411739651.2A patent/CN119527497A/en active Pending
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