A method and system for calculating corrosion life considering recurrence period for realizing digital power grid

Abstract

The present invention provides a method and system for calculating the corrosion life considering the recurrence period of a digital power grid, and relates to the technical field of digital power grids. The method comprises: obtaining basic parameter information of a transmission line iron tower; calculating a component cross-sectional dimension influence coefficient according to the component cross-sectional thickness; determining the corrosion rate according to the corrosion grade of the environment where the transmission iron tower is located, and calculating the corrosion environment influence factor; calculating the recurrence period influence factor according to the design load recurrence period, design service life, component cross-sectional thickness and reference thickness of the transmission iron tower; determining the reference service life of the transmission iron tower component based on the galvanized layer thickness of the component; and calculating the actual service life of the transmission iron tower according to the component cross-sectional dimension influence coefficient, the corrosion environment influence factor, the recurrence period influence factor and the reference service life. The present invention can efficiently calculate the actual service life of the transmission line iron tower under different recurrence periods and different corrosion environments, and provide powerful digital support for the durability design of the power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of digital power grids, and in particular, to a calculation method and system for corrosion life considering the recurrence period for realizing a digital power grid. Background Art

[0002] In the construction of transmission network projects, transmission towers, as the strong backbone of power transmission, their reliability is directly related to the safety and stability of the entire power grid system. However, for the prediction of the corrosion life of transmission tower structures under different recurrence periods, there has been a lack of effective prediction methods and accurate digital means in the field of structural design, which has become a major bottleneck restricting power grid design, resulting in the difficulty in quantifying the durability and corrosion service life of transmission tower structures. Furthermore, it affects the operation and maintenance of the entire life cycle of the towers, posing a potential threat to the safety of the power grid system. This problem not only limits the durability and sustainable development of power grid structures, but also hinders the pace of the transformation of power grids towards digitalization and intelligentization.

[0003] Therefore, there is an urgent need for a calculation method and system for the corrosion life of transmission towers considering the recurrence period, which can efficiently and intelligently calculate the actual service life of transmission line towers under different recurrence periods and different corrosion environments, providing digital support for the durability design of power grids. Summary of the Invention

[0004] The present invention aims to solve at least one of the above technical problems existing in the prior art.

[0005] For this reason, in the first aspect of the present invention, a calculation method for corrosion life considering the recurrence period for realizing a digital power grid is provided.

[0006] In the second aspect of the present invention, a calculation system for corrosion life considering the recurrence period for realizing a digital power grid is provided.

[0007] The present invention provides a calculation method for corrosion life considering the recurrence period for realizing a digital power grid, including:

[0008] Obtaining the basic parameter information of the transmission line tower; the basic parameter information includes the thickness of the component cross-section, the thickness of the galvanized layer, the corrosion grade of the environment where the transmission tower is located, the design load recurrence period, and the design service life;

[0009] Calculating the influence coefficient of the component cross-section size according to the thickness of the component cross-section and the reference thickness;

[0010] Determining the corrosion rate according to the corrosion grade of the environment where the transmission tower is located, and calculating the corrosion environment influence factor according to the corrosion rate;

[0011] Calculating the recurrence period influence factor according to the design load recurrence period, the design service life, the thickness of the component cross-section, and the reference thickness of the transmission tower;

[0012] Determine the reference service life of transmission tower components based on the thickness of the galvanized layer of the components;

[0013] Calculate the actual service life of the transmission tower components considering the load recurrence period and corrosion environment impact based on the component cross-sectional dimension influence coefficient, corrosion environment impact factor, recurrence period impact factor, and reference service life, and select the minimum value of the actual service life among all transmission tower components as the actual service life of the transmission tower.

[0014] According to the corrosion life calculation method considering the recurrence period for realizing a digital power grid according to the above technical solution of the present invention, it may further have the following additional technical features:

[0015] In the above technical solution, calculating the component cross-sectional dimension influence coefficient according to the component cross-sectional thickness and reference thickness includes:

[0016]

[0017] wherein, represents the component cross-sectional dimension influence coefficient; represents the component cross-sectional thickness; represents the reference thickness.

[0018] In the above technical solution, the corrosion grades include C1 grade, C2 grade, C3 grade, C4 grade, and C5 grade divided according to the ISO9223 standard.

[0019] In the above technical solution, determining the corrosion rate according to the corrosion grade of the environment where the transmission tower is located includes:

[0020] When the corrosion grade of the environment where the transmission tower is located is C1 grade, the corrosion rate is 0.1 μm / year;

[0021] When the corrosion grade of the environment where the transmission tower is located is C2 grade, the corrosion rate is 0.7 μm / year;

[0022] When the corrosion grade of the environment where the transmission tower is located is C3 grade, the corrosion rate is 2.1 μm / year;

[0023] When the corrosion grade of the environment where the transmission tower is located is C4 grade, the corrosion rate is 4.2 μm / year;

[0024] When the corrosion grade of the environment where the transmission tower is located is C5 grade, the corrosion rate is 8.4 μm / year.

[0025] In the above technical solution, calculating the corrosion environment impact factor according to the corrosion rate includes:

[0026]

[0027] Among them, represents the corrosion environment impact factor; represents the corrosion rate.

[0028] In the above technical solution, calculating the recurrence period impact factor according to the design load recurrence period, design service life, member section thickness, and reference thickness of the transmission tower includes:

[0029]

[0030] Among them, represents the recurrence period impact factor; represents the design load recurrence period; represents the design service life; represents the member section thickness; represents the reference thickness.

[0031] In the above technical solution, determining the reference service life of the transmission tower member based on the galvanized layer thickness of the member includes:

[0032]

[0033] Among them, represents the reference service life of the transmission tower member; represents the galvanized layer thickness of the member.

[0034] In the above technical solution, calculating the actual service life of the transmission tower member considering the load recurrence period and corrosion environment impact according to the member section size impact coefficient, corrosion environment impact factor, recurrence period impact factor, and reference service life includes:

[0035]

[0036] Among them, represents the actual service life of the transmission tower member; represents the member section size impact coefficient; represents the recurrence period impact factor; represents the corrosion environment impact factor; represents the reference service life of the transmission tower member.

[0037] In the above technical solution, it further includes:

[0038] According to the comparison result between the actual service life of the transmission tower and the set threshold, judge whether the actual service life of the transmission tower meets the required service life under the current recurrence period and corrosion state.

[0039] A corrosion life calculation system considering the recurrence period for realizing a digital power grid provided by the present invention is applied to the corrosion life calculation method described in any one of the above technical solutions. The system includes:

[0040] A basic database for storing basic parameter information;

[0041] A recurrence period corrosion life evaluation module, connected to the basic database, calculates the cross-sectional dimension influence coefficient, corrosion environment influence factor, recurrence period influence factor, benchmark service life, and actual service life of transmission tower components according to the cross-sectional dimension influence calculation criterion, corrosion environment influence calculation accuracy, recurrence period influence calculation criterion, and actual corrosion life calculation criterion based on the basic parameter information, and determines the actual service life of the transmission tower according to the actual service life of all transmission tower components;

[0042] An output module, connected to the recurrence period corrosion life evaluation module, obtains the calculated actual service life of the transmission tower, compares it with the required service life, and obtains an evaluation result.

[0043] In summary, due to the adoption of the above technical features, the beneficial effects of the present invention are:

[0044] The present invention proposes a corrosion life calculation method and system considering the recurrence period for realizing a digital power grid. This method can efficiently and intelligently calculate the actual service life of transmission line towers under different recurrence periods and different corrosion environments, providing strong digital support for the durability design of the power grid.

[0045] The additional aspects and advantages of the present invention will become apparent in the following description section, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0047] Figure 1 is a flowchart of a corrosion life calculation method considering the recurrence period for realizing a digital power grid according to an embodiment of the present invention;

[0048] Figure 2 is an operation schematic diagram of a corrosion life calculation system considering the recurrence period for realizing a digital power grid according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] In order to more clearly understand the above objects, features, and advantages of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0050] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those described herein, and thus, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0051] The following refers to Figure 1 and Figure 2 to describe a corrosion life calculation method and system for realizing a digital power grid considering the recurrence period according to some embodiments of the present invention.

[0052] Some embodiments of the present application provide a corrosion life calculation method for realizing a digital power grid considering the recurrence period.

[0053] As Figure 1 shown, the first embodiment of the present invention proposes a corrosion life calculation method for realizing a digital power grid considering the recurrence period, including steps S1 - S6. It should be noted that the order of steps S1 - S6 referred to in this disclosure is only for illustrative purposes. In actual application, those skilled in the art can adjust according to actual needs, and steps in different orders can also be executed simultaneously.

[0054] S1. Obtain the basic parameter information of the transmission line tower; the basic parameter information includes the thickness of the component cross-section, the thickness of the galvanized layer, the corrosion grade of the environment where the transmission tower is located, the design load recurrence period, and the design service life. Among them, the load recurrence period refers to the average time interval for a certain event to occur or happen. The recurrence period measured in years is inversely proportional to the annual exceedance probability of the load, and the design load recurrence period is the design value of the above-mentioned numerical value.

[0055] It should be noted that the basic parameter information collected in step S1 should at least include the necessary data required for subsequent actual service life calculation. These data can be the collected data without calculation or the result data obtained from other calculations and statistics. In a specific embodiment, the basic parameter information includes basic parameters such as the corrosion grade of the environment where the transmission tower is located, the thickness of the galvanized layer, the design load recurrence period, the design service life, the safety level, the component specifications, and the cross-sectional dimensions.

[0056] S2. Calculate the component cross-section size influence coefficient according to the component cross-section thickness and the reference thickness.

[0057] In some embodiments, the calculation method of step S2 includes:

[0058]

[0059] Among them, represents the component cross-section size influence coefficient; represents the component cross-section thickness, with the unit of mm; It represents the reference thickness. In a specific embodiment, the reference thickness is taken as 10 - 12 mm.

[0060] S3. Determine the corrosion rate according to the corrosion grade of the environment where the transmission tower is located, and calculate the corrosion environment impact factor according to the corrosion rate.

[0061] In some embodiments, the corrosion grades include C1 grade, C2 grade, C3 grade, C4 grade, and C5 grade divided according to the ISO9223 standard.

[0062] It should be noted that ISO 9223 is an international standard related to metal corrosion. C1 grade, C2 grade, C3 grade, C4 grade, and C5 grade are all corrosion grades clearly distinguished in this standard. The specific classification is as follows:

[0063] The C1 - level corrosion grade means that in a dry and pollution - free atmospheric environment, the corrosion rate of metal materials is very slow, and generally will not cause obvious corrosion damage to metal materials. Such an environment generally only exists in special occasions such as laboratories.

[0064] The C2 - level corrosion grade means that in a slightly polluted atmospheric environment such as cities and industrial areas, the corrosion rate of metal materials is slow, but if metal materials are exposed to this environment for a long time, they will still be corroded to a certain extent. In this environment, metal materials need to be maintained regularly.

[0065] The C3 - level corrosion grade means that in a moderately polluted atmospheric environment such as coastal areas and urban industrial areas, the corrosion rate of metal materials is relatively fast, and metal materials will be significantly corroded. In this environment, metal materials need to take some measures, such as coating and anti - corrosion treatment, to extend their service life.

[0066] The C4 - level corrosion grade means that in a severely polluted atmospheric environment such as the ocean and chemical plants, the corrosion rate of metal materials is very fast, and metal materials will be severely corroded. In this environment, metal materials need to take high - strength anti - corrosion measures, such as using stainless steel, galvanized materials, etc.

[0067] The C5 - level corrosion grade means that in an extremely polluted atmospheric environment such as chemical plants and offshore oil platforms, the corrosion rate of metal materials is very fast, and metal materials will be extremely severely corroded. In this environment, metal materials need to take the highest - strength anti - corrosion measures, such as using special alloy materials and electrophoretic coating.

[0068] The CX grade is also divided in the ISO 9223 standard, but it has little significance for calculating the actual service life of the transmission tower in this disclosure, so it is not analyzed in this disclosure.

[0069] In a specific embodiment, determining the corrosion rate according to the corrosion grade of the environment where the transmission tower is located includes:

[0070] When the corrosion grade of the environment where the transmission tower is located is C1 grade, the corrosion rate is 0.1 μm / year;

[0071] When the corrosion grade of the environment where the transmission tower is located is C2 grade, the corrosion rate is 0.7 μm / year;

[0072] When the corrosion grade of the environment where the transmission tower is located is C3 grade, the corrosion rate is 2.1 μm / year;

[0073] When the corrosion grade of the environment where the transmission tower is located is C4 grade, the corrosion rate is 4.2 μm / year;

[0074] When the corrosion grade of the environment where the transmission tower is located is C5 grade, the corrosion rate is 8.4 μm / year.

[0075] It should be noted that in the embodiments of the present disclosure, step S3 is a process of assignment, and the specific value of the corrosion rate is the most representative result obtained through a large amount of data analysis in the present disclosure. Those skilled in the art can use an approximate value of the following specific value for assignment to obtain an approximate result. However, the principle that must be met is: the higher the corrosion grade, the larger the value of the corrosion environment influence coefficient.

[0076] In some embodiments, calculating the corrosion environment influence factor according to the corrosion rate includes:

[0077]

[0078] Among them, represents the corrosion environment influence factor; represents the corrosion rate.

[0079] S4. Calculate the recurrence period influence factor according to the design load recurrence period, design service life, member section thickness, and reference thickness of the transmission tower.

[0080] In some embodiments, the calculation method of the recurrence period influence factor under different design load recurrence periods in step S4 is as follows:

[0081]

[0082] Among them, represents the recurrence period influence factor; represents the design load recurrence period; represents the design service life; represents the member section thickness; represents the reference thickness.

[0083] S5. Determine the reference service life of the transmission tower components based on the thickness of the galvanized layer of the components.

[0084] In some embodiments, the calculation method of the reference service life in step S5 includes:

[0085]

[0086] wherein, represents the reference service life of the transmission tower components; represents the thickness of the galvanized layer of the components.

[0087] S6. Calculate the actual service life of the transmission tower components considering the influence of the load recurrence period and the corrosion environment according to the component cross-sectional size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor, and the reference service life, and select the minimum value of the actual service life among all the transmission tower components as the actual service life of the transmission tower.

[0088] Specifically, through the above steps S1 - S5, the component cross-sectional size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor, and the reference service life calculated respectively quantify the influence on the actual life of the transmission tower components from four aspects: the component cross-sectional size, the corrosion environment, the design load recurrence period, and the reference service life. Combining the above indicators, the actual life of the transmission tower components can be obtained.

[0089] In some embodiments, the calculating the actual service life of the transmission tower components considering the influence of the load recurrence period and the corrosion environment according to the component cross-sectional size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor, and the reference service life includes:

[0090]

[0091] wherein, represents the actual service life of the transmission tower components; represents the component cross-sectional size influence coefficient; represents the recurrence period influence factor; represents the corrosion environment influence factor; represents the reference service life of the transmission tower components.

[0092] Subsequently, the actual service life of the transmission tower is determined as:

[0093]

[0094] wherein, represents the actual service life of the transmission tower.

[0095] After obtaining the actual service life of the transmission tower, the safety and reliability of the transmission tower can be further evaluated.

[0096] In some embodiments, step S7 is further included.

[0097] S7. According to the comparison result between the actual service life of the transmission tower and the set threshold, determine whether the actual service life of the transmission tower meets the required service life under the current recurrence period and corrosion state.

[0098] Specifically, when the actual service life of the transmission tower is greater than or equal to the set threshold, it indicates that the actual service life of the transmission tower can meet the required service life under the current recurrence period and corrosion state; when the actual service life of the transmission tower is less than the set threshold, it indicates that the actual service life of the transmission tower cannot meet the required service life under the current recurrence period and corrosion state, and component repair and reinforcement are required. When repairing and reinforcing, the transmission tower components with actual service life not meeting the requirements can be focused on. The specific value of the set threshold can be flexibly set according to the operation year requirements.

[0099] Some other embodiments of the present invention provide a corrosion life calculation system considering the recurrence period for realizing a digital power grid, which is applied to the corrosion life calculation method as described in any of the above embodiments. The system includes: a basic database, a recurrence period corrosion life evaluation module, and an output module.

[0100] The basic database is used to store basic parameter information; as Figure 2 shown, in some embodiments, the basic database includes an environmental parameter library, a design information library, and a specification library to classify and store corrosion parameter information, design parameter information, and material specification information. In a specific embodiment, the above basic parameter information is imported into the corresponding parameter library in the.xls or.xlsx format.

[0101] The recurrence period corrosion life evaluation module is connected to the basic database, reads the data streams of the environmental parameter library, the design information library, and the specification library, and calculates the cross-sectional dimension influence coefficient, the corrosion environment influence factor, the recurrence period influence factor, the reference service life, and the actual service life of the transmission tower components according to the basic parameter information by calling the cross-sectional dimension influence calculation criterion, the corrosion environment influence calculation accuracy, the recurrence period influence calculation criterion, and the actual corrosion life calculation criterion, and determines the actual service life of the transmission tower according to the actual service life of all transmission tower components.

[0102] It can be understood that the above cross-sectional dimension influence calculation criterion, the corrosion environment influence calculation accuracy, the recurrence period influence calculation criterion, and the actual corrosion life calculation criterion correspond to the calculation methods of the above steps S2 - S6. The calculation methods of steps S2 - S6 are collectively referred to as the life calculation criterion, and the specific algorithms can be stored in the life calculation criterion library for waiting to be called.

[0103] The output module is connected to the recurrence period corrosion life assessment module, obtains the calculated actual service life of the transmission tower, and compares it with the required service life to obtain the evaluation result.

[0104] In Figure 2 the illustrated embodiment, the output module is shown as a GUI window (Graphical User Interface) and a result terminal.

[0105] The operation process of the output module is as follows: The recurrence period corrosion life assessment module outputs the calculation result of the actual service life to the GUI window in the form of a data stream. Based on the calculation result of the actual service life of the transmission tower, the GUI window makes an evaluation judgment, and the judgment principle is as follows:

[0106] When the actual service life of the entire tower , it is considered that under the current recurrence period and corrosion state, the actual service life of the tower meets the owner's required service life, and the evaluation is "service life meets requirements", and it is displayed as "green"; where is the set threshold.

[0107] When the actual service life of the entire tower , it is considered that under the current recurrence period and corrosion state, the actual service life of the tower does not meet the owner's required service life, and the evaluation is "service life does not meet requirements, components need to be repaired and strengthened", and it is displayed as "red"; then according to the non-conforming component numbers and quantities are screened out, and further the component numbers that need to be repaired and strengthened can be obtained.

[0108] After obtaining the prediction result of the actual service life of the entire tower and the evaluation suggestions, the GUI window outputs the data stream to the result terminal. After passing through the online approval process within the owner, a corrosion life prediction and evaluation report of the transmission tower considering the recurrence period is formed in the ".PDF" file format, and then a file finished product is formed for convenient engineering use.

[0109] In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0110] Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for calculating the corrosion life of a digital power grid taking into account the recurrence period, characterized in that: include: Obtain basic parameter information of transmission line towers; The basic parameter information includes the cross-sectional thickness of the component, the thickness of the galvanized layer, the corrosion level of the environment in which the transmission tower is located, the design load recurrence period and the design service life; Calculate the component section size influence coefficient based on the component section thickness and reference thickness; Determine the corrosion rate according to the corrosion grade of the environment where the transmission tower is located, and calculate the corrosion environment impact factor based on the corrosion rate; Calculate the recurrence period impact factor based on the design load recurrence period, design service life, component section thickness and reference thickness of the transmission tower; include: in, represents the return period impact factor; represents the design load return period; Indicates the design service life; Indicates the cross-sectional thickness of the component; Indicates the base thickness; Determine the benchmark service life of transmission tower components based on the thickness of the galvanized layer of the components; The actual service life of the transmission tower components after considering the load recurrence period and the influence of the corrosion environment is calculated according to the cross-sectional size influence coefficient of the components, the corrosion environment influence factor, the recurrence period influence factor and the benchmark service life, and the minimum value of the actual service life of all transmission tower components is selected as the actual service life of the transmission tower; the calculation method of the actual service life includes: in, Indicates the actual service life of transmission tower components; Indicates the influence coefficient of the cross-sectional size of the component; represents the return period impact factor; Indicates the corrosion environment influencing factor; Indicates the benchmark service life of transmission tower components.

2. The method for calculating the corrosion life of a digital power grid taking into account the return period according to claim 1 is characterized in that: The calculation of the component cross-sectional dimension influence coefficient according to the component cross-sectional thickness and the reference thickness includes: in, Indicates the influence coefficient of the cross-sectional size of the component; Indicates the cross-sectional thickness of the component; Indicates the base thickness.

3. The corrosion life calculation method considering the recurrence period of the digital power grid according to claim 1 is characterized in that: The corrosion grades include C1 grade, C2 grade, C3 grade, C4 grade and C5 grade divided according to ISO9223 standard.

4. The method for calculating the corrosion life of a digital power grid taking into account the return period according to claim 3 is characterized in that: Determining the corrosion rate according to the corrosion level of the environment where the transmission tower is located includes: When the corrosion level of the environment where the transmission tower is located is C1, the corrosion rate is 0.1 μm / year; When the corrosion level of the environment where the transmission tower is located is C2, the corrosion rate is 0.7 μm / year; When the corrosion level of the environment where the transmission tower is located is C3, the corrosion rate is 2.1 μm / year; When the corrosion level of the environment where the transmission tower is located is C4, the corrosion rate is 4.2 μm / year; When the corrosion level of the environment where the transmission tower is located is C5, the corrosion rate is 8.4 μm / year.

5. The method for calculating the corrosion life considering the recurrence period of the digital power grid according to claim 4 is characterized in that: The calculation of the corrosion environment impact factor according to the corrosion rate includes: in, Indicates the corrosion environment influencing factor; Represents the corrosion rate.

6. The corrosion life calculation method considering the recurrence period of the digital power grid according to claim 1 is characterized in that: The method of determining the benchmark service life of a transmission tower component based on the thickness of the galvanized layer of the component comprises: in, Indicates the benchmark service life of transmission tower components; Indicates the thickness of the galvanized layer of the component.

7. The corrosion life calculation method considering the return period of the digital power grid according to claim 1 is characterized in that: Also includes: According to the comparison result of the actual service life of the transmission tower and the set threshold, it is judged whether the actual service life of the transmission tower meets the required life under the current recurrence period and corrosion state.

8. A corrosion life calculation system for realizing a digital power grid taking into account the recurrence period, characterized in that: The corrosion life calculation method according to any one of claims 1 to 7, wherein the system comprises: Basic database, used to store basic parameter information; The return period corrosion life assessment module is connected to the basic database, and according to the basic parameter information, the cross-sectional size influence calculation criteria, the corrosion environment influence calculation accuracy, the return period influence calculation criteria and the actual corrosion life calculation criteria are called to calculate the cross-sectional size influence coefficient, the corrosion environment influence factor, the return period influence factor, the benchmark service life and the actual service life of the transmission tower components, and the actual service life of the transmission tower is determined according to the actual service life of all the transmission tower components; The output module is connected to the return period corrosion life assessment module to obtain the calculated actual service life of the transmission tower and compare it with the required life to obtain the assessment result.

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