Corrosion life calculation method and system considering recurrence period for realizing digital power grid

Abstract

The invention provides a recurrence period-considered corrosion life calculation method and system for realizing a digital power grid, and relates to the technical field of digital power grids, and the method comprises the steps: obtaining the basic parameter information of a power transmission line iron tower; calculating a component section size influence coefficient according to the component section thickness; determining a corrosion rate according to a corrosion level of an environment where the transmission tower is located, and calculating a corrosion environment influence factor; calculating a return period influence factor according to the design load return period, the design service life, the component section thickness and the reference thickness of the power transmission tower; determining the reference service life of the transmission tower component based on the zinc coating thickness of the component; and calculating the actual service life of the power transmission tower according to the component section size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor and the reference service life. According to the method, the actual service life of the power transmission line iron tower in different recurrence periods and different corrosion environments can be efficiently calculated, and powerful digital support is provided for durability design of a power grid.

Description

Technical Field

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

[0002] In the construction of power transmission network projects, transmission towers serve as the backbone of power transmission, and 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, the field of structural design has always lacked effective prediction methods and accurate digital means, which has become a major bottleneck restricting power grid design, making it difficult to quantify the durability and corrosion service life of transmission tower structures, which in turn affects the operation and maintenance of the towers throughout their life cycle, posing a potential threat to the safety of the power grid system. This problem not only limits the durability and sustainable development of the power grid structure, but also hinders the pace of the power grid's transformation to digitalization and intelligence.

[0003] Therefore, there is an urgent need for a method and system for calculating the corrosion life of transmission towers that can take into account the recurrence period, so as to efficiently and intelligently calculate the actual service life of transmission line towers under different recurrence periods and different corrosion environments, and provide 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-mentioned technical problems existing in the prior art.

[0005] To this end, a first aspect of the present invention provides a corrosion life calculation method for a digital power grid taking into account the recurrence period.

[0006] A second aspect of the present invention provides a corrosion life calculation system for implementing a digital power grid taking into account the recurrence period.

[0007] The present invention provides a method for calculating the corrosion life of a digital power grid taking into account the recurrence period, comprising: Obtaining basic parameter information of the transmission line tower; the basic parameter information includes component section thickness, galvanized layer thickness, corrosion level of the environment where the transmission tower is located, design load recurrence period and 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; 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 based on the component cross-sectional size influence coefficient, 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.

[0008] The method for calculating the corrosion life of a digital power grid taking into account the recurrence period according to the above technical solution of the present invention may also have the following additional technical features: In the above technical solution, the calculation of the component cross-sectional dimension influence coefficient according to the component cross-sectional thickness and the reference thickness includes:

[0009] 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.

[0010] In the above technical solution, the corrosion grades include C1 grade, C2 grade, C3 grade, C4 grade and C5 grade divided according to ISO9223 standard.

[0011] In the above technical solution, the method of 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.

[0012] In the above technical solution, the calculation of the corrosion environment impact factor according to the corrosion rate includes:

[0013] in, Indicates the corrosion environment influencing factor; Represents the corrosion rate.

[0014] In the above technical solution, the calculation of the recurrence period influencing factor according to the design load recurrence period, design service life, component section thickness and reference thickness of the transmission tower includes:

[0015] 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.

[0016] In the above technical solution, the method of determining the benchmark service life of the transmission tower component based on the thickness of the galvanized layer of the component includes:

[0017] in, Indicates the benchmark service life of transmission tower components; Indicates the thickness of the galvanized layer of the component.

[0018] In the above technical solution, the actual service life of the transmission tower component after considering the load recurrence period and the influence of the corrosion environment is calculated according to the component cross-sectional size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor and the benchmark service life, including:

[0019] 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.

[0020] The above technical solution 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.

[0021] The present invention provides a corrosion life calculation system for realizing a digital power grid taking into account the return period, which is applied to the corrosion life calculation method described in any one of the above technical solutions, and 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.

[0022] In summary, due to the adoption of the above technical features, the beneficial effects of the present invention are: The present invention proposes a corrosion life calculation method and system for realizing a digital power grid taking into account the recurrence period. The 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.

[0023] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a flow chart of a method for calculating the corrosion life of a digital power grid taking into account the recurrence period according to an embodiment of the present invention; Figure 2 The diagram is a schematic diagram of the operation of a corrosion life calculation system for a digital power grid taking into account the recurrence period according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0027] Refer to the following Figure 1 and Figure 2The following describes a corrosion life calculation method and system for implementing a digital power grid taking into account a recurrence period, provided in accordance with some embodiments of the present invention.

[0028] Some embodiments of the present application provide a corrosion life calculation method for implementing a digital power grid taking into account the recurrence period.

[0029] like Figure 1 As shown, the first embodiment of the present invention proposes a method for calculating the corrosion life of a digital power grid taking into account the recurrence period, including steps S1-S6. It should be noted that the order of steps S1-S6 referred to in the present disclosure is only a schematic representation. In actual application, those skilled in the art can adjust it according to actual needs, and steps of different orders can also be executed simultaneously.

[0030] S1. Obtain basic parameter information of the transmission line tower; 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. Among them, the load recurrence period refers to the average time interval between the occurrence or occurrence of an event, and the recurrence period measured in years is inversely proportional to the annual probability of load exceedance, and the design load recurrence period is the design value of the above values.

[0031] It should be noted that the basic parameter information collected in step S1 should at least include the necessary data required for the subsequent actual service life calculation, which may be uncalculated collected data or result data obtained from other calculation statistics. In a specific embodiment, the basic parameter information includes the corrosion level of the environment in which 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, the cross-sectional dimensions and other basic parameters.

[0032] S2. Calculate the component cross-sectional dimension influence coefficient based on the component cross-sectional thickness and the reference thickness.

[0033] In some embodiments, the calculation method of step S2 includes:

[0034] in, Indicates the influence coefficient of the cross-sectional size of the component; Indicates the cross-sectional thickness of the component, in mm; It represents the reference thickness. In a specific embodiment, the reference thickness is 10-12 mm.

[0035] S3. Determine the corrosion rate according to the corrosion grade of the environment where the transmission tower is located, and calculate the corrosion environment influencing factor based on the corrosion rate.

[0036] In some embodiments, the corrosion levels include C1, C2, C3, C4 and C5 levels classified according to ISO9223 standards.

[0037] It should be noted that ISO 9223 is an international standard related to metal corrosion. C1, C2, C3, C4 and C5 are all corrosion levels clearly distinguished in the standard. The specific classification is as follows: C1 corrosion level means that in a dry, pollution-free atmospheric environment, the corrosion rate of metal materials is very slow and generally does not cause significant corrosion damage to metal materials. This environment generally only exists in special occasions such as laboratories.

[0038] C2 corrosion level means that in slightly polluted atmospheric environments such as cities and industrial areas, the corrosion rate of metal materials is relatively slow, but metal materials will still suffer a certain degree of corrosion damage after long-term exposure to such environments. In such environments, metal materials need to be regularly maintained and serviced.

[0039] C3 corrosion level means that in the medium-polluted atmospheric environment such as coastal areas and urban industrial areas, the corrosion rate of metal materials is relatively fast and the metal materials will suffer obvious corrosion damage. In this environment, metal materials need to take some measures, such as coating and anti-corrosion treatment, to extend their service life.

[0040] C4 corrosion level means that in the seriously polluted atmosphere such as oceans and chemical plants, the corrosion rate of metal materials is very fast and the metal materials will be seriously damaged by corrosion. In this environment, metal materials need to take high-intensity anti-corrosion measures, such as using stainless steel, galvanized and other materials.

[0041] C5 corrosion level means that in extremely polluted atmospheric environments such as chemical plants and offshore oil platforms, the corrosion rate of metal materials is very fast and the metal materials will suffer extremely serious corrosion damage. In this environment, the metal materials need to take the strongest anti-corrosion measures, such as using special alloy materials and electrophoretic coatings.

[0042] The ISO 9223 standard also divides the CX grades, but they are of little significance to the actual service life calculation of transmission towers in this disclosure and are not analyzed in this disclosure.

[0043] In a specific embodiment, the step of determining the corrosion rate according to the corrosion level of the environment in which 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.

[0044] It should be noted that in the embodiment of the present disclosure, step S3 is a process of assigning values, and the specific value of the corrosion rate is the most representative result obtained by the present disclosure after a large amount of data analysis. Those skilled in the art can use the following approximate values ​​of the specific values ​​for assignment to obtain approximate results. However, the principle that must be met is: the higher the corrosion level, the greater the value of the corrosion environment impact coefficient.

[0045] In some embodiments, calculating the corrosion environment impact factor according to the corrosion rate includes:

[0046] in, Indicates the corrosion environment influencing factor; Represents the corrosion rate.

[0047] S4. Calculate the recurrence period influencing factor based on the design load recurrence period, design service life, component section thickness and reference thickness of the transmission tower.

[0048] In some embodiments, the calculation method of the return period influence factor under different design load return periods in step S4 is as follows:

[0049] 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.

[0050] S5. Determine the benchmark service life of the transmission tower components based on the thickness of the galvanized layer of the components.

[0051] In some embodiments, the method for calculating the reference service life in step S5 includes:

[0052] in, Indicates the benchmark service life of transmission tower components; Indicates the thickness of the galvanized layer of the component.

[0053] S6. Calculate the actual service life of the transmission tower components after considering the load recurrence period and the influence of the corrosion environment based on the component cross-sectional size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor and the benchmark service life, and select the minimum value of the actual service life of all transmission tower components as the actual service life of the transmission tower.

[0054] Specifically, after the above steps S1-S5, the calculated component cross-sectional dimension influence coefficient, corrosion environment influence factor, recurrence period influence factor and benchmark service life respectively quantify the influence on the actual service life of the transmission tower components from four aspects: component cross-sectional dimension, corrosion environment, design load recurrence period and benchmark service life. Combining the above indicators, the actual service life of the transmission tower components can be obtained.

[0055] In some embodiments, the actual service life of the transmission tower component after considering the load recurrence period and the influence of the corrosion environment is calculated based on the component cross-sectional size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor and the benchmark service life, including:

[0056] 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.

[0057] Subsequently, the actual service life of the transmission tower is determined to be:

[0058] in, Indicates the actual service life of the transmission tower.

[0059] By obtaining the actual service life of the transmission tower, the safety and reliability of the transmission tower can be further evaluated.

[0060] In some embodiments, step S7 is also included.

[0061] S7. Based on the comparison result between the actual service life of the transmission tower and the set threshold value, determine whether the actual service life of the transmission tower meets the required service life under the current recurrence period and corrosion state of the transmission tower.

[0062] Specifically, when the actual service life of the transmission tower is greater than or equal to the set threshold, it means that the actual service life of the transmission tower can meet the required 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 means that the actual service life of the transmission tower cannot meet the required life under the current recurrence period and corrosion state, and component repair and reinforcement are required. During the repair and reinforcement, the focus can be on repairing the transmission tower components whose actual service life does not meet the requirements. The specific value of the set threshold can be flexibly set according to the operating life requirements.

[0063] Other embodiments of the present invention provide a corrosion life calculation system for a digital power grid taking into account the recurrence period, 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 assessment module and an output module.

[0064] The basic database is used to store basic parameter information; Figure 2 As 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 .xls or .xlsx format.

[0065] The return period corrosion life assessment module is connected to the basic database, reads the data stream of the environmental parameter library, design information library and specification library, and calls the cross-sectional size influence calculation criteria, corrosion environment influence calculation accuracy, return period influence calculation criteria and actual corrosion life calculation criteria according to the basic parameter information to calculate the cross-sectional size influence coefficient, corrosion environment influence factor, return period influence factor, benchmark service life and actual service life of transmission tower components, and determines the actual service life of the transmission tower based on the actual service life of all transmission tower components.

[0066] It is understandable that the above-mentioned cross-sectional size influence calculation criteria, corrosion environment influence calculation accuracy, recurrence period influence calculation criteria and actual corrosion life calculation criteria correspond to the calculation methods of the above-mentioned steps S2-S6. The calculation methods of steps S2-S6 are collectively referred to as life calculation criteria, and the specific algorithms can be stored in the life calculation criteria library and wait for calling.

[0067] 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.

[0068] exist Figure 2 In the illustrated embodiment, the output module is illustrated as a GUI window (Graphical User Interface) and a result terminal.

[0069] The operation process of the output module is as follows: the return period corrosion life assessment module outputs the actual service life calculation results to the GUI window in the form of data stream. Based on the calculation results of the actual service life of the transmission tower, the GUI window makes an assessment and judgment. The judgment principles are as follows: The actual service life of the whole tower When the actual service life of the tower meets the owner's required service life under the current return period and corrosion state, it is evaluated as "service life meets requirements" and displayed as "green". That is to set the threshold.

[0070] The actual service life of the whole tower When the actual service life of the tower does not meet the owner's required service life under the current return period and corrosion state, it is evaluated as "the service life does not meet the requirements, and repair and reinforcement of components are required", and it is displayed as "red"; then according to By filtering out the component numbers and quantities that do not meet the requirements, we can further obtain the component numbers that need to be repaired and reinforced.

[0071] After obtaining the actual service life prediction results and evaluation suggestions for the entire tower, the GUI window outputs the data stream to the result terminal. After the result terminal passes the owner's internal online approval process, it forms a corrosion life prediction and evaluation report for the transmission tower considering the recurrence period in the ".PDF" file format, and then forms a finished file for easy engineering use.

[0072] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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; 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 based on the component cross-sectional size influence coefficient, 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.

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 calculation of the recurrence period influencing factor according to the design load recurrence period, design service life, component section thickness and reference thickness of the transmission tower includes: 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.

7. The corrosion life calculation method considering the return 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.

8. The corrosion life calculation method considering the recurrence period of the digital power grid according to claim 1 is characterized in that: The actual service life of the transmission tower component after considering the load recurrence period and the influence of the corrosion environment is calculated based on the component cross-sectional size influence coefficient, the corrosion environment influence factor, the recurrence period influence factor and the benchmark service life, including: 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.

9. 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.

10. A corrosion life calculation system considering the recurrence period for realizing a digital power grid, characterized in that: The corrosion life calculation method according to any one of claims 1 to 9, 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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