Simple calculation method and system for mooring tension of floating wind power platform

Abstract

The application provides a floating wind power platform mooring tension simple calculation method and system, the scheme is that the winch is operated to collect the chain, when the winch is operated from the initial state to the vertical state of the hydraulic oil cylinder, the operation is stopped and the pressure is kept, the oil cylinder pressure value is checked, the load-free pressure value is calculated according to the known load-free pressure value, the mooring chain measuring tension is calculated by using the torque balance formula, and the mooring tension is calculated based on the range of the failure sensor. Thus, the mooring tension can be quickly calculated during the failure of the mooring tension sensor of the offshore floating wind power platform, so that the mooring tension can be effectively controlled, and the mooring safety is ensured.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a simplified method and system for calculating the mooring pull of a floating wind power platform. Background Technology

[0002] The mooring system is a key component of a floating wind turbine platform, affecting its positioning and operational safety. Therefore, the mooring pull needs to be monitored. This invention addresses a mooring system for an existing offshore floating wind turbine platform, consisting of a winch, chain stopper, and mooring chain. The chain stopper's enclosed hollow shaft is pre-installed with strain gauges as mooring pull sensors. If these strain gauges detach or are damaged due to installation quality issues or sudden impacts, for a floating wind turbine platform located tens of kilometers offshore, it means that the disassembly and replacement of the vessel and its components will be impossible in the short term. During this period, the mooring pull will be unknown, posing a safety hazard to the floating wind turbine platform's operation and survival in the complex and ever-changing marine environment of wind, waves, and currents. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention proposes a simplified method and system for calculating the mooring pull force of floating wind power platforms. This solves the technical problem in existing technologies where unexpected malfunctions of mooring pull force sensors prevent the rapid disassembly and replacement of components, leading to unknown mooring pull force and increasing safety hazards for floating wind power platforms.

[0004] A simplified method for calculating the mooring tension of a floating wind power platform includes: performing chain winding operation on the winch corresponding to the failed sensor; stopping and maintaining pressure when the winch moves from its initial state to a vertical position of the hydraulic cylinder; checking the cylinder pressure value displayed on the winch's cylinder and obtaining the winch's no-load pressure value; calculating the measured tension of the mooring chain using a torque balance formula based on the cylinder pressure value and the no-load pressure value; and calculating the mooring tension based on the range of the failed sensor and the measured tension.

[0005] In one embodiment, the formula for calculating the mooring chain tension using the torque balance formula, based on the cylinder pressure value and the no-load pressure value, is as follows:

[0006]

[0007] P = P 油缸 -P 空载

[0008] Where F is the calculated tension of the mooring chain, r is the cylinder radius; η is the mechanical efficiency of the winch; A is the vertical distance from the winch center to the cylinder axis; B is the distance from the winch center to the mooring chain axis; P 油缸P represents the cylinder pressure value displayed on the cylinder. 空载 This is the no-load pressure.

[0009] In one embodiment, the no-load pressure is the pressure of the winch without the mooring chain.

[0010] In one embodiment, the step of calculating the mooring force based on the range of the failed sensor and the measured force includes: calculating the proportion of the measured force to the range of the failed sensor; selecting a corresponding preset coefficient based on the proportion; and calculating the mooring force based on the preset coefficient and the measured force.

[0011] F = μF 原始

[0012] Among them, F 原始 is the mooring tension, μ is a preset coefficient, and F is the calculated tension of the mooring chain.

[0013] In one embodiment, the preset coefficient is determined by the synchronously varying rated mooring pull of the winch and the pressure value fed back from the winch hydraulic cylinder.

[0014] A simplified system for calculating the mooring tension of a floating wind power platform includes a chain-retracting module, a pressure value acquisition module, a tension calculation module, and a tension calculation module. The chain-retracting module is used to perform chain-retracting operations on the winch corresponding to the failed sensor, stopping and maintaining pressure when the winch reaches a vertical position from its initial state. The pressure value acquisition module is used to view the cylinder pressure value displayed on the winch's cylinder and acquire the winch's no-load pressure value. The tension calculation module is used to calculate the measured tension of the mooring chain using a torque balance formula based on the cylinder pressure value and the no-load pressure value. The tension calculation module is used to calculate the mooring tension based on the range of the failed sensor and the measured tension.

[0015] In one embodiment, the tension calculation module includes a preset coefficient selection unit and a mooring tension calculation unit, wherein: the preset coefficient selection unit is used to calculate the proportion of the measured tension to the range of the failed sensor, and select a corresponding preset coefficient according to the proportion; the mooring tension calculation unit is used to calculate the mooring tension according to the preset coefficient and the measured tension.

[0016] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the simplified method for calculating the mooring pull force of a floating wind power platform as described in the above embodiments.

[0017] A storage medium storing a computer program that, when executed by a processor, implements the steps of a simplified method for calculating the mooring pull force of a floating wind power platform as described in the above embodiments.

[0018] As can be seen from the above technical solution, the beneficial technical effects of the present invention are as follows:

[0019] This solution involves operating the winch to retract the chain. When the winch reaches a vertical position from its initial state, it stops and maintains pressure, monitoring the cylinder pressure value. Based on the predicted no-load pressure, the calculated tension of the mooring chain is determined using a torque balance formula. Then, based on the range of the failed sensor, the mooring tension is calculated from the calculated tension. This allows for rapid calculation of the mooring tension even during periods of sensor failure on offshore floating wind power platforms, ensuring effective control of the mooring tension and guaranteeing mooring safety. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a flowchart illustrating a simplified method for calculating the mooring pull of a floating wind power platform in one embodiment.

[0022] Figure 2 This is a schematic diagram of the mooring system in one embodiment;

[0023] Figure 3 This is a schematic diagram of a winch performing chain winding operation in one embodiment;

[0024] Figure 4 This is a schematic diagram of the chain take-up length of the winch in one embodiment;

[0025] Figure 5 This is a structural block diagram of a simplified calculation system for mooring pull force of a floating wind power platform in one embodiment;

[0026] Figure 6 This is a structural block diagram of the tensile force calculation module in one embodiment;

[0027] Figure 7 This is an internal structural diagram of a computer device in one embodiment.

[0028] Figure label:

[0029] 1-Mooring chain, 2-Windlock, 3-Strain gauge mounting shaft, 4-Chain stop gate, 5-Chain stopper, 6-Hydraulic cylinder. Detailed Implementation

[0030] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0031] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which this invention pertains. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data used can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. Unless otherwise stated, the term "a plurality of" means two or more. In this disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B. The term "and / or" describes an association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B. The term "corresponding" can refer to an association or binding relationship; A corresponding to B means that there is an association or binding relationship between A and B.

[0032] In one embodiment, such as Figure 1 As shown, a simplified method for calculating the mooring pull of a floating wind power platform is provided, including the following steps:

[0033] S110 performs chain winding operation on the winch corresponding to the failed sensor. When the winch moves from the initial state to the vertical state of the hydraulic cylinder, it stops and maintains pressure.

[0034] Specifically, the mooring system of existing offshore floating wind power platforms consists of winches, chain stoppers, mooring chains, etc. Figure 2 As shown, the system includes a mooring chain 1, a winch 2, a strain gauge mounting shaft 3, a chain stopper 4, a chain stopper 5, and a hydraulic cylinder 6. The chain stopper's enclosed hollow shaft has a strain gauge pre-installed as a mooring tension sensor before leaving the factory. The failed sensor in step S110 is due to the mooring tension sensor becoming detached or damaged due to installation quality issues, sudden impacts, etc., causing it to fail and making it impossible to measure the mooring tension. After the sensor fails, a chain-retracting operation is manually performed on the corresponding winch. The winch moves from its initial state until the hydraulic cylinder is in a nearly vertical position and stops, maintaining pressure. Figure 3As shown, to bring the hydraulic cylinder to a near-vertical position, the manual control allows for manual stopping at any desired point during the winch chain winding process. This is a normal functional operation, where only one winch can be operated at a time. One chain winding cycle is as follows: chain stopper 4 opens – rocker arm cylinder lifts (i.e., controls hydraulic cylinder 6) to begin chain winding – cylinder lifts to its limit – chain stopper 4 closes – lifting pawl on the cylinder disengages – lifting cylinder retracts and resets – lifting pawl resets. Once hydraulic cylinder 6 is manually controlled to move from an inclined position to a near-vertical position, subsequent steps can be performed. Figure 4 As shown, when the hydraulic cylinder is raised to the vertical position, the chain retraction stroke is only 482mm, which is less than the length of one chain link (the length of one chain link is approximately 730mm); and the wind power platform is flexibly connected to the seabed through multiple anchor chains, so local tension adjustment has no impact on the platform.

[0035] S120 displays the cylinder pressure value of the winch and obtains the no-load pressure value of the winch.

[0036] Specifically, check the pressure value displayed on the winch cylinder at this time; this is the cylinder pressure value.

[0037] In one embodiment, the no-load pressure is the pressure of the winch without the mooring chain.

[0038] Specifically, the no-load pressure is the pressure of the winch without the mooring chain. It is a constant value obtained through a winch no-load test, and is usually taken as 0.4 MPa.

[0039] S130 calculates the measured tension of the mooring chain using a torque balance formula based on the cylinder pressure value and the no-load pressure value.

[0040] In one embodiment, the calculation formula for step S130 is as follows:

[0041]

[0042] P = P 油缸 -P 空载

[0043] Where F is the calculated tension of the mooring chain, r is the cylinder radius; η is the mechanical efficiency of the winch; A is the vertical distance from the winch center to the cylinder axis; B is the distance from the winch center to the mooring chain axis; P 油缸 P represents the cylinder pressure value displayed on the cylinder. 空载 This is the no-load pressure.

[0044] Specifically, the mechanical efficiency of the winch is a constant value, obtained through a winch no-load test, and is typically taken as 0.95. Based on the explanations in the above steps, P... 空载 The value is then 0.4 MPa.

[0045] Based on the range of the failed sensor, the S140 calculates the mooring tension according to the measured tension.

[0046] In one embodiment, step S140 includes: calculating the proportion of the measured tension to the range of the failed sensor, selecting a corresponding preset coefficient based on the proportion; and calculating the mooring tension based on the preset coefficient and the measured tension.

[0047] F = μF 原始

[0048] Among them, F 原始 is the mooring tension, μ is a preset coefficient, and F is the calculated tension of the mooring chain.

[0049] Specifically, the factors contributing to μ should consider changes in chain tension, sensor accuracy, and frictional resistance during chain take-up; the influence of deviation factors gradually decreases with increasing mooring force. 原始 This refers to the mooring force value displayed on the screen (i.e., the value to be monitored) assuming the sensor is not damaged. It is calculated by comparing the calculated force F from multiple winches with the value F displayed at the sensor. 原始 In comparison, when the measured tension F of the mooring chain is about 13% lower than the sensor's range, the numerical comparison is irregular and the dispersion is large; when F is between 20% and 37%, F = μF. 原始 μ is between 1.14 and 1.33; when F is between 38% and 60%, F = μF. 原始 μ is set to 1.06-1.14. When F is between 60% and 100% of the sensor's range, it exceeds the winch's rated mooring force and enters the over-pulling range, so no data was measured. The platform's mooring force setting is 31.5% of the range, therefore μ is set to 1.14-1.33.

[0050] In one embodiment, the preset coefficient is determined by the synchronously varying rated mooring pull of the winch and the pressure value fed back from the winch hydraulic cylinder.

[0051] Specifically, for example, the sensor range for this project is approximately 200 tons, and the required rated mooring force is approximately 63 tons. Therefore, on the factory test bench, when the winch is operated to raise the anchor chain to the rated mooring force (approximately 63 tons), the pressure value fed back by the winch hydraulic cylinder at this point (approximately 9.5 MPa) is recorded; the chain is continued to be raised until the winch's rated force (approximately 120 tons) is reached, and the pressure value fed back by the winch hydraulic cylinder at this point (approximately 16 MPa) is recorded; the chain is raised by approximately 0.5 MPa each time the winch hydraulic cylinder rises, and the mooring force value is recorded until 16 MPa is reached. Data is recorded for the remaining winches in this manner. The formula is used. The calculation is performed by increasing the pressure by 0.5 MPa each time until reaching 16 MPa. The data are then compared to obtain F and F. 原始The coefficients between them; statistical coefficients, divided into 1.06-1.14 and 1.14-1.33, with μ taking 1.14-1.33 based on the rated mooring force value.

[0052] In one embodiment, such as Figure 5 As shown, a simplified system for calculating the mooring tension of a floating wind power platform is provided, including a chain take-up module 210, a pressure value acquisition module 220, a tension calculation module 230, and a tension calculation module 240, wherein:

[0053] The chain-retracting module 210 is used to perform chain-retracting operation on the winch corresponding to the failure sensor. When the winch runs from the initial state to the vertical state of the hydraulic cylinder, it stops and maintains pressure.

[0054] The pressure value acquisition module 220 is used to view the cylinder pressure value displayed by the winch cylinder and to acquire the no-load pressure value of the winch.

[0055] The tension calculation module 230 is used to calculate the tension of the mooring chain based on the cylinder pressure value and the no-load pressure value using the torque balance formula.

[0056] The tension calculation module 240 is used to calculate the mooring tension based on the range of the failed sensor and the measured tension.

[0057] In one embodiment, such as Figure 6 As shown, the tension calculation module 240 includes a preset coefficient selection unit 241 and a mooring tension calculation unit 242, wherein:

[0058] The preset coefficient selection unit 241 is used to calculate the proportion of the measured tensile force relative to the range of the failed sensor, and select the corresponding preset coefficient according to the proportion.

[0059] The mooring force calculation unit 242 is used to calculate the mooring force based on preset coefficients and measured force.

[0060] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 7As shown, the computer device includes a processor, memory, network interface, and database connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and database. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores configuration templates and can also be used to store target webpage data. The network interface communicates with external terminals via a network connection. When executed by the processor, the computer program implements a simplified method for calculating the mooring pull of a floating wind power platform.

[0061] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0062] In one embodiment, a storage medium is also provided, which stores a computer program including program instructions that, when executed by the computer, cause the computer to perform the methods as described in the foregoing embodiments. The computer may be part of a simplified mooring pull calculation system for a floating wind power platform as mentioned above.

[0063] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a computer storage medium (ROM / RAM, magnetic disk, optical disk) for execution by the computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Therefore, the present invention is not limited to any particular hardware and software combination.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A simplified method for calculating the mooring pull force of a floating wind power platform, characterized in that, include: The winch corresponding to the failed sensor is operated to retract the chain. When the winch moves from the initial state to the vertical state of the hydraulic cylinder, it stops and maintains pressure. Check the hydraulic cylinder pressure value displayed on the winch's hydraulic cylinder and obtain the winch's no-load pressure value; Based on the cylinder pressure value and the no-load pressure value, the calculated tension of the mooring chain is calculated using the torque balance formula, which is as follows: in, For calculating the tension of the mooring chain, Where is the radius of the hydraulic cylinder; The mechanical efficiency of the winch; This is the vertical distance from the winch center to the cylinder axis; This is the distance from the winch center to the mooring chain axis. The hydraulic cylinder pressure value displayed on the hydraulic cylinder; This is the no-load pressure; Calculate the proportion of the measured tension to the range of the failed sensor, select a corresponding preset coefficient based on the proportion, and calculate the mooring tension based on the preset coefficient and the measured tension. The specific calculation formula is as follows: ； in, To calculate the tensile force, For preset coefficients, For mooring pull.

2. The simplified method for calculating the mooring pull of a floating wind power platform according to claim 1, characterized in that, The no-load pressure is the pressure of the winch without the mooring chain.

3. The simplified method for calculating the mooring pull of a floating wind power platform according to claim 1, characterized in that, The preset coefficient is determined by the synchronously changing rated mooring pull of the winch and the pressure value fed back from the winch hydraulic cylinder.

4. A simplified calculation system for mooring pull force of a floating wind power platform, characterized in that, It includes a chain winding module, a pressure value acquisition module, a tensile force measurement module, and a tensile force calculation module, among which: The chain-retracting module is used to perform chain-retracting operation on the winch corresponding to the failure sensor. When the winch runs from the initial state to the vertical state of the hydraulic cylinder, it stops and maintains pressure. The pressure value acquisition module is used to view the cylinder pressure value displayed by the winch's cylinder and to acquire the winch's no-load pressure value. The tension calculation module is used to calculate the tension of the mooring chain based on the cylinder pressure value and the no-load pressure value, using a torque balance formula, as follows: in, For calculating the tension of the mooring chain, Where is the radius of the hydraulic cylinder; The mechanical efficiency of the winch; This is the vertical distance from the winch center to the cylinder axis; This is the distance from the winch center to the mooring chain axis. The hydraulic cylinder pressure value displayed on the hydraulic cylinder; This is the no-load pressure; The tension calculation module is used to calculate the proportion of the measured tension to the range of the failed sensor, select a corresponding preset coefficient based on the proportion, and calculate the mooring tension based on the preset coefficient and the measured tension. The specific calculation formula is as follows: ； in, To calculate the tensile force, For preset coefficients, For mooring pull.

5. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 3.

6. A storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 3.

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