CN113628068A - Method for analyzing current situation of foundation scouring of offshore wind turbine - Google Patents
Method for analyzing current situation of foundation scouring of offshore wind turbine Download PDFInfo
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- 238000009991 scouring Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 15
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Abstract
The invention provides an offshore wind turbine foundation scouring status analysis method, which comprises data acquisition, rationality and effectiveness analysis, technical parameter verification, data statistics and analysis, result output, scouring evolution analysis, data analysis and result compilation; the method for rapidly displaying the current scouring situation of the fan foundation by measuring the current situation of the submarine topography around the fan foundation and automatically counting and analyzing the measured data provides a set of complete scouring situation analysis process. The method for analyzing the current situation of the basic scouring of the offshore wind turbine, provided by the invention, has higher feasibility and considerable advancement, can fill the blank that China lacks a special technology for analyzing the basic scouring results of the offshore wind turbine at present, has reference significance for researching the current situation of scouring, and simultaneously has a good promoting effect on further researching scouring monitoring data and researching scouring conditions in multiple angles.
Description
Technical Field
The invention relates to the technical field of offshore wind power safety monitoring, quality detection and risk assessment, in particular to an offshore wind turbine foundation scouring current situation analysis method.
Background
Wind power generation is a new industry which is rapidly developed in recent years in China, particularly the offshore wind power industry, and the time of the first wind power field which is really put into power generation operation is only about five years to date. Due to the factors of short duration, rapid development, more limitations, great difficulty and the like, a large number of problems still remain to be solved in the offshore wind power industry in China at present, and many problems also exist in the aspects of safety construction, operation and maintenance of offshore wind power.
The offshore wind farm is in a marine environment under the combined action of kinetic energy such as wind power, waves, tidal current and the like. The submarine topography continuously evolves under the action of tide, surge and the like, and the phenomena of scouring and elutriation on the seabed are more serious when severe sea conditions such as hurricanes, waves and torrents are met; in addition, as the pile bodies such as the fan foundation change the flow state of local ocean currents at the seabed, a water flow turbulence and vortex system with higher strength is generated around the pile bodies, and the scouring effect of the ocean floor surface around the foundation pile bodies is intensified. When the cover body around the fan foundation of the offshore wind power plant is rolled by water flow to form a scouring pit, the foundation burial depth is reduced, the suspension of the peripheral submarine cables is aggravated, the stability of the fan foundation and the peripheral submarine cables is reduced, and immeasurable loss can be brought in severe cases.
The scouring condition of the terrain around the offshore wind turbine foundation is an important factor influencing the safety of the offshore wind turbine foundation, the accurate, detailed understanding and analysis of the scouring condition around the wind turbine foundation are very important, and the scouring condition is also a problem of great concern of design units, construction units and construction units in the construction and operation periods of offshore wind power plants.
At present, China has no existing relevant wind power detection and monitoring standards, international special programs and software specially used for analyzing and researching the scouring condition of the peripheral terrain of the foundation of the offshore wind turbine are also few, similar analysis experiences in other industries are mostly used, analysis and judgment are carried out by means of third-party software such as measurement software and database analysis, a rigorous, scientific and systematic analysis method is lacked, pertinence and professiveness are not provided, and analysis results are difficult to meet the requirements of foundation construction and protection of the wind turbine. Therefore, the method for analyzing the scouring condition and the current situation of the seabed terrain around the foundation of the offshore wind turbine can preliminarily meet the monitoring and analyzing requirements of the scouring condition of the foundation of the existing offshore wind turbine.
Disclosure of Invention
The invention mainly aims to provide an offshore wind turbine foundation scouring current situation analysis method aiming at the current situation that the monitoring of the foundation scouring of wind turbines in most offshore wind power plants in China needs to be known urgently.
Therefore, the technical scheme adopted by the invention is as follows: the basic scouring condition of the offshore wind turbine mainly comprises four major factors: scouring range, scouring form, scouring depth and scouring square amount. The factors can be obtained by a method for counting and analyzing multi-beam measurement result data and the like according to the actual conditions of each wind power plant, so the detailed content and the flow for performing the washout status analysis comprise the following steps: data acquisition → rationality and effectiveness analysis → calculation parameter verification → data statistics and analysis → result output → scouring evolution analysis → data analysis → result compilation, specifically, the offshore wind turbine foundation scouring status analysis method comprises the following steps:
s1, acquiring data, including acquiring basic information of the wind turbine, and extracting regional topographic data and basic unit data;
s2, analyzing the rationality and the effectiveness, wherein the rationality of the data is judged according to the normal distribution of the numerical values, and whether the data are in the corresponding fan position range is judged;
s3, calculating parameter verification, including determination of an effective range and an effective elevation;
s4, data statistics and analysis, including firstly, respectively counting corresponding coordinates of the maximum value, the minimum value, the average value and the minimum value of the elevation in the effective range, meanwhile, counting the depths of different angles in the scouring range, counting the maximum elevation value of each meter from the central range, and then respectively calculating the maximum pit-scouring depth and the erosion-deposition square amount;
s5, outputting results, namely drawing a three-dimensional chromatogram and a plan to show the flushing condition of the periphery of the fan foundation;
s6, scouring evolution analysis, namely judging the evolution condition of scouring by analyzing the topographic data of two or more times around the same fan foundation, wherein the evolution condition comprises an elevation average value change rate, a maximum pit depth change rate, a scouring range change and a scouring form change;
s7, analyzing data, and performing overall evaluation on the whole field, wherein the overall evaluation comprises the evaluation on the scouring degree and topographic relief, the evaluation on the scouring protection integrity and the maximum pit depth distribution of the whole field; and
s8, compiling the result, and organizing the project general view, the monitoring requirement, the monitoring method, the data arrangement, the monitoring result, the conclusion and the suggestion into a text.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: in step S1, the wind turbine foundation information refers to the central coordinates of the wind turbine, the foundation form, the size specification, the pile sinking time, and the designed mud surface elevation.
As a preferred technical scheme of the invention: in step S1, the basic unit data extraction is to divide the data of the entire field into small pieces of data with each fan as a unit, so as to facilitate subsequent statistical analysis.
As a preferred technical scheme of the invention: in step S3, the effective range refers to a range in which the current state of erosion is analyzed and divided in one data block, and the radius of the effective range is determined according to the type of the pile foundation, the design requirements, and the actual situation on site.
As a preferred technical scheme of the invention: in step S3, the effective elevation refers to the height limit within the effective range, that is: and eliminating the data of the foundation and the interference data which possibly influences the analysis, and determining the height limit value in the effective range of the single fan foundation.
As a preferred technical scheme of the invention: in the step S4, the calculation of the maximum pit depth and the erosion square amount includes selecting a reference elevation, selecting a design mud level elevation as the reference elevation according to actual requirements of the project, or selecting an average sea floor elevation value with relatively small influence of erosion on the periphery of the fan foundation, subtracting the minimum value of the reference elevation and the elevation to calculate the maximum pit depth, and calculating the erosion square amount by integration.
As a preferred technical scheme of the invention: in the step S8, the monitoring result means that the scouring condition around the foundation of each wind turbine is displayed in text description and graphics, and the text description means that the elevation range, the scouring degree and the topographic relief condition around each wind turbine are described in text; graphical representation refers to representation in the form of three-dimensional chromatograms and planar views.
The invention provides an offshore wind turbine foundation scouring status analysis method, which comprises data acquisition, rationality and effectiveness analysis, technical parameter verification, data statistics and analysis, result output, scouring evolution analysis, data analysis and result compilation; the method for rapidly displaying the current scouring situation of the fan foundation by measuring the current situation of the submarine topography around the fan foundation and automatically counting and analyzing the measured data provides a set of complete scouring situation analysis process. The method for analyzing the current situation of the basic scouring of the offshore wind turbine, provided by the invention, has higher feasibility and considerable advancement, can fill the blank that China lacks a special technology for analyzing the basic scouring results of the offshore wind turbine at present, has reference significance for researching the current situation of scouring, and simultaneously has a good promoting effect on further researching scouring monitoring data and researching scouring conditions in multiple angles.
Drawings
Fig. 1 is a flowchart of a current situation analysis method for basic scouring of an offshore wind turbine provided by the invention.
FIG. 2 is a schematic diagram of effective range division of the fan foundation periphery.
FIG. 3 is a schematic diagram of a base peripheral reference elevation of a wind turbine.
Fig. 4a-4f are fan-based monitoring results presentations, in which: FIG. 4a is a three-dimensional view of a single pile foundation scour (treated for anti-scour protection) and FIG. 4b is a plan view of the single pile foundation scour; FIG. 4c is a three-dimensional view of another monopile foundation scour condition (without scour protection treatment); FIG. 4d is a three-dimensional view of the foundation of the high pile cap in the case of scouring; FIG. 4e is a three-dimensional view of the composite cartridge base flush; FIG. 4f is a three-dimensional view of the booster station base flush condition.
Detailed Description
The invention is described in further detail with reference to the figures and specific embodiments.
Referring to fig. 1, the basic scouring condition of the offshore wind turbine mainly includes four major elements: scouring range, scouring form, scouring depth and scouring square amount. The factors can be obtained by a method for counting and analyzing multi-beam measurement result data and the like according to the actual conditions of each wind power plant, so the detailed content and the flow for performing the washout status analysis comprise the following steps: data acquisition → rationality and effectiveness analysis → calculation parameter verification → data statistics and analysis → result output → scouring evolution analysis → data analysis → result compilation, specifically, the offshore wind turbine foundation scouring status analysis method comprises the following steps:
s1, acquiring data, including acquiring basic information of the wind turbine, and extracting regional topographic data and basic unit data;
the wind turbine foundation information refers to the central coordinate, the foundation form, the size specification, the pile sinking time and the designed mud surface elevation of the wind turbine.
The basic unit data extraction means that data of the whole field area is divided into small blocks of data with each fan as a unit, so that subsequent statistical analysis is facilitated.
S2, analyzing the rationality and the effectiveness, wherein the rationality of the data is judged according to the normal distribution of the numerical values, and whether the data are in the corresponding fan position range is judged;
s3, calculating parameter verification, including determination of an effective range and an effective elevation;
the effective range refers to the range of dividing and analyzing the current scouring situation in a data block, and the radius of the effective range is determined according to the type of the pile foundation, the design requirement and the actual situation of the site.
Effective elevation refers to the height limit within the effective range, i.e.: and eliminating the data of the foundation and the interference data which possibly influences the analysis, and determining the height limit value in the effective range of the single fan foundation.
S4, data statistics and analysis, including firstly, respectively counting corresponding coordinates of the maximum value, the minimum value, the average value and the minimum value of the elevation in the effective range, meanwhile, counting the depths of different angles in the scouring range, counting the maximum elevation value of each meter from the central range, and then respectively calculating the maximum pit-scouring depth and the erosion-deposition square amount;
the calculation of the maximum pit depth and the maximum silt flushing amount includes the steps of firstly selecting a reference elevation, selecting a designed mud surface elevation as the reference elevation according to actual requirements of projects, or selecting an average sea floor elevation value with relatively small influence of scouring on the periphery of a fan foundation, then calculating the maximum pit depth by subtracting the minimum value of the reference elevation and the minimum value of the elevation, and calculating the silt flushing amount by integral calculation.
S5, outputting results, namely drawing a three-dimensional chromatogram and a plan to show the flushing condition of the periphery of the fan foundation;
s6, scouring evolution analysis, namely judging the evolution condition of scouring by analyzing the topographic data of two or more times around the same fan foundation, wherein the evolution condition comprises an elevation average value change rate, a maximum pit depth change rate, a scouring range change and a scouring form change;
s7, analyzing data, and performing overall evaluation on the whole field, wherein the overall evaluation comprises the evaluation on the scouring degree and topographic relief, the evaluation on the scouring protection integrity and the maximum pit depth distribution of the whole field;
s8, compiling the result, and organizing the project general view, the monitoring requirement, the monitoring method, the data arrangement, the monitoring result, the conclusion and the suggestion into a text.
The monitoring result means that the scouring condition of the periphery of the foundation of each fan is displayed in a text description and a figure, and the text description means that the elevation range, the scouring degree and the topographic relief condition of the periphery of each fan are described through the text; graphical representation refers to representation in the form of three-dimensional chromatograms and plan views, as shown with reference to fig. 4a-4 f.
The above-described embodiments are intended to illustrate the present invention, but not to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.
Claims (7)
1. A current situation analysis method for foundation scouring of an offshore wind turbine is characterized by comprising the following steps: the method for analyzing the current situation of the foundation scouring of the offshore wind turbine comprises the following steps:
s1, acquiring data, including acquiring basic information of the wind turbine, and extracting regional topographic data and basic unit data;
s2, analyzing the rationality and the effectiveness, wherein the rationality of the data is judged according to the normal distribution of the numerical values, and whether the data are in the corresponding fan position range is judged;
s3, calculating parameter verification, including determination of an effective range and an effective elevation;
s4, data statistics and analysis, including firstly, respectively counting corresponding coordinates of the maximum value, the minimum value, the average value and the minimum value of the elevation in the effective range, meanwhile, counting the depths of different angles in the scouring range, counting the maximum elevation value of each meter from the central range, and then respectively calculating the maximum pit-scouring depth and the erosion-deposition square amount;
s5, outputting results, namely drawing a three-dimensional chromatogram and a plan to show the flushing condition of the periphery of the fan foundation;
s6, scouring evolution analysis, namely judging the evolution condition of scouring by analyzing the topographic data of two or more times around the same fan foundation, wherein the evolution condition comprises an elevation average value change rate, a maximum pit depth change rate, a scouring range change and a scouring form change;
s7, analyzing data, and performing overall evaluation on the whole field, wherein the overall evaluation comprises the evaluation on the scouring degree and topographic relief, the evaluation on the scouring protection integrity and the maximum pit depth distribution of the whole field;
s8, compiling the result, and organizing the project general view, the monitoring requirement, the monitoring method, the data arrangement, the monitoring result, the conclusion and the suggestion into a text.
2. The current status analysis method for foundation scour of an offshore wind turbine according to claim 1, characterized in that: in step S1, the wind turbine foundation information refers to the central coordinates of the wind turbine, the foundation form, the size specification, the pile sinking time, and the designed mud surface elevation.
3. The current status analysis method for foundation scour of an offshore wind turbine according to claim 1, characterized in that: in step S1, the basic unit data extraction is to divide the data of the entire field into small pieces of data with each fan as a unit, so as to facilitate subsequent statistical analysis.
4. The current status analysis method for foundation scour of an offshore wind turbine according to claim 1, characterized in that: in step S3, the effective range refers to a range in which the current state of erosion is analyzed and divided in one data block, and the radius of the effective range is determined according to the type of the pile foundation, the design requirements, and the actual situation on site.
5. The current status analysis method for foundation scour of an offshore wind turbine according to claim 1, characterized in that: in step S3, the effective elevation refers to the height limit within the effective range, that is: and eliminating the data of the foundation and the interference data which possibly influences the analysis, and determining the height limit value in the effective range of the single fan foundation.
6. The current status analysis method for foundation scour of an offshore wind turbine according to claim 1, characterized in that: in the step S4, the calculation of the maximum pit depth and the erosion square amount includes selecting a reference elevation, selecting a design mud level elevation as the reference elevation according to actual requirements of the project, or selecting an average sea floor elevation value with relatively small influence of erosion on the periphery of the fan foundation, subtracting the minimum value of the reference elevation and the elevation to calculate the maximum pit depth, and calculating the erosion square amount by integration.
7. The current status analysis method for foundation scour of an offshore wind turbine according to claim 1, characterized in that: in the step S8, the monitoring result means that the scouring condition around the foundation of each wind turbine is displayed in text description and graphics, and the text description means that the elevation range, the scouring degree and the topographic relief condition around each wind turbine are described in text; graphical representation refers to representation in the form of three-dimensional chromatograms and planar views.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116090303A (en) * | 2023-01-16 | 2023-05-09 | 广东科诺勘测工程有限公司 | Risk assessment method, device and equipment for scouring state of offshore pile foundation |
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