Wire fatigue life determination method, system and device and storage medium

Abstract

A wire fatigue life determination method, system and device and a storage medium, comprising: acquiring wind speed data and transmission line wire parameters of a to-be-evaluated region, and performing wind speed distribution probability analysis within a set time period based on the wind speed data; based on the wind speed distribution probability and the power transmission line conductor parameters in the set time period, determining a stress fatigue cycle index under the wind speed by combining a pre-constructed relationship between the wind speed and the stress fatigue cycle index; the fatigue life of the wire is obtained based on the wind speed stress fatigue cycle index and the maximum fatigue cycle index of the wire; wherein the relationship between the wind speed and the stress fatigue cycle number is determined by simulating a power transmission line simulation analysis model based on an equivalent high-frequency force time history corresponding to the wind speed. According to the method, the fatigue stress amplitude deviation caused by the fact that the wire wind vibration form cannot be accurately divided and a wrong wire wind vibration analysis model cannot be selected is avoided through mass actually-measured wire wind load data in combination with fatigue stress amplitude simulation analysis.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a method, system, device and storage medium for determining fatigue life of a conductor. Background Art

[0002] Theoretically, wind vibration of conductors includes three forms, namely, random vibration under pulsating wind, breeze vibration under vortex excitation force, and dancing under dancing load. According to the existing wind load calculation theory, different vibration forms require different wind load calculation models. Only by loading the conductor model and performing wind vibration force calculation on the conductor in the time domain can the stress amplitude time history curve at the section of interest be extracted, and then a specific fatigue stress cycle statistical method is used to complete the estimation of the fatigue life of the conductor.

[0003] However, it is currently impossible to distinguish the three wind vibration states through actual measurements, nor is it possible to quantify the occurrence ratio of the three wind vibration states. There is no unified wind load calculation model that can comprehensively consider the real wind load under the above three vibrations. In other words, the existing wind load calculation model only considers one form of wind vibration and cannot simulate the impact of different forms of wind on the life of the conductor in actual use scenarios. Summary of the invention

[0004] In order to solve the problem that the prior art only considers the service life of the conductor under a wind vibration state, while ignoring the influence of wind force on the service life of the conductor in actual application scenarios, the present invention proposes a method for determining the fatigue life of the conductor, including:

[0005] Obtain wind speed data and transmission line conductor parameters for the area to be assessed, and perform a probability analysis of wind speed distribution within a set period of time based on the wind speed data;

[0006] Determine the number of stress fatigue cycles at the wind speed based on the wind speed distribution probability and the transmission line conductor parameters within the set time period combined with the pre-established relationship between wind speed and stress fatigue cycles;

[0007] Based on the number of wind speed stress fatigue cycles and the maximum number of fatigue cycles of the conductor, the fatigue life of the conductor is obtained;

[0008] Wherein, the relationship between the wind speed and the number of stress fatigue cycles is determined by simulating the power transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to the wind speed;

[0009] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0010] Optionally, the determination of the relationship between the wind speed and the number of stress fatigue cycles includes:

[0011] Obtain the transmission line conductor model, common span and construction tension information of the area to be assessed;

[0012] Constructing a transmission line simulation analysis model based on the transmission line conductor model, common span, and construction tension information;

[0013] The average wind speed within the sampling period is grouped according to the set wind speed interval from 1m / s to the design wind speed of the transmission line;

[0014] Performing simulation analysis on the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each group of wind speeds, and obtaining the number of stress fatigue cycles corresponding to each group of wind speeds;

[0015] The relationship between the wind speed and the number of stress fatigue cycles is obtained from each group of wind speeds and the number of stress fatigue cycles.

[0016] Optionally, the process of determining the equivalent high-frequency force time history corresponding to each group of wind speeds includes:

[0017] Apply each set of wind speeds to the conductor in turn, and collect the equivalent horizontal force component time history and vertical force component time history on the conductor cross section;

[0018] The equivalent high-frequency force time history on the cross section is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section of the conductor and the distance to the next cross section.

[0019] Optionally, the equivalent high-frequency force time history on the cross section is calculated as follows:

[0020]

[0021] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the vertical force time history, l i is the distance from section i to section i+1.

[0022] Optionally, the determining the number of stress fatigue cycles at the wind speed within the set time based on the wind speed distribution probability within the set time period and the transmission line conductor parameters in combination with a pre-established relationship between wind speed and stress fatigue cycles includes:

[0023] Based on the conductor model and wind speed distribution probability in the transmission line conductor parameters, the relationship between the wind speed and the number of stress fatigue cycles corresponding to the conductor model and wind speed is selected to determine the number of stress fatigue cycles;

[0024] The number of stress fatigue cycles at the wind speed within a set time is obtained by multiplying the wind speed distribution probability by the number of stress fatigue cycles.

[0025] Optionally, obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor includes:

[0026] The fatigue life of the conductor is obtained by dividing the maximum fatigue cycle number of the conductor by the wind speed stress fatigue cycle number and then multiplying the result by the set time.

[0027] Optionally, after obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor, the method further includes:

[0028] The fatigue life of the conductor, the conductor model and the wind speed corresponding to the conductor are stored in a database.

[0029] In another aspect, the present application also provides a wire fatigue life determination system, comprising:

[0030] An acquisition module is used to acquire wind speed data and transmission line conductor parameters of the area to be evaluated, and perform a probability analysis of wind speed distribution within a set time period based on the wind speed data;

[0031] A cycle number determination module, used to determine the number of stress fatigue cycles under the wind speed based on the wind speed distribution probability and the transmission line conductor parameters in a set time period combined with a pre-established relationship between wind speed and stress fatigue cycle number;

[0032] A life calculation module, used for obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor;

[0033] Wherein, the relationship between the wind speed and the number of stress fatigue cycles is determined by simulating the power transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to the wind speed;

[0034] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0035] Optionally, a relationship determination module is also included, for:

[0036] Obtain the transmission line conductor model, common span and construction tension information of the area to be assessed;

[0037] Constructing a transmission line simulation analysis model based on the transmission line conductor model, common span, and construction tension information;

[0038] The average wind speed within the sampling period is grouped according to the set wind speed interval from 1m / s to the design wind speed of the transmission line;

[0039] Performing simulation analysis on the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each group of wind speeds, and obtaining the number of stress fatigue cycles corresponding to each group of wind speeds;

[0040] The relationship between the wind speed and the number of stress fatigue cycles is obtained from each group of wind speeds and the number of stress fatigue cycles.

[0041] Optionally, an equivalent high-frequency force time course determination module is also included, which is used to:

[0042] Apply each set of wind speeds to the conductor in turn, and collect the equivalent horizontal force component time history and vertical force component time history on the conductor cross section;

[0043] The equivalent high-frequency force time history on the cross section is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section of the conductor and the distance to the next cross section.

[0044] Optionally, the equivalent high-frequency force time history on the cross section is calculated as follows:

[0045]

[0046] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the vertical force time history, l i is the distance from section i to section i+1.

[0047] Optionally, the cycle number determination module is specifically used to:

[0048] Based on the conductor model and wind speed distribution probability in the transmission line conductor parameters, the relationship between the wind speed and the number of stress fatigue cycles corresponding to the conductor model and wind speed is selected to determine the number of stress fatigue cycles;

[0049] The number of stress fatigue cycles at the wind speed within a set time is obtained by multiplying the wind speed distribution probability by the number of stress fatigue cycles.

[0050] Optionally, the life calculation module is specifically used for:

[0051] The fatigue life of the conductor is obtained by dividing the maximum fatigue cycle number of the conductor by the wind speed stress fatigue cycle number and then multiplying the result by the set time.

[0052] In another aspect, the present application further provides an electronic device, comprising: at least one processor and a memory; the memory and the processor are connected via a bus;

[0053] The memory is used to store one or more programs;

[0054] When the one or more programs are executed by the at least one processor, the method for determining the fatigue life of a wire as described above is implemented.

[0055] On the other hand, the present application also provides a computer-readable storage medium having an execution program stored thereon, and when the execution program is executed, the method for determining the fatigue life of a wire as described above is implemented.

[0056] Compared with the prior art, the beneficial effects of the present invention are as follows: by obtaining the number of stress fatigue cycles of each conductor in a time period at each wind speed and the frequency of occurrence of each wind speed in the current area in a time period, the number of stress fatigue cycles of each conductor in a time period in the current area is obtained, and then the fatigue life of each conductor is determined in combination with the maximum number of stress fatigue cycles allowed for each conductor. The conductor fatigue life determination method of the present invention obtains the number of conductor stress fatigue cycles at all wind speeds, realizes a method for determining the fatigue life of a conductor without distinguishing the form of wind vibration, gets rid of the limitations of the theoretical calculation model, greatly improves the accuracy of the calculation of the fatigue life of the conductor, and improves the feasibility of screening high-risk points of conductor fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A flow chart of a method for determining fatigue life of a conductor according to the present invention;

[0058] Figure 2 It is a schematic diagram of a test cross section of a test wire of the present invention;

[0059] Figure 3 It is a schematic diagram of the structure of the electronic device of the present invention. DETAILED DESCRIPTION

[0060] To improve the accuracy of fatigue life calculation of wind-vibrated conductors, it is necessary to complete the actual measurement of wind loads on massive conductors without distinguishing the form of wind vibration, and use this as input conditions to obtain the actual stress amplitude of the wind-vibrated conductors. Then, with the help of appropriate stress cycle statistical algorithms, the fatigue life of the conductors under certain time periods and wind speed conditions can be obtained. Then, a conductor fatigue life database with a large number of samples of different models can be established. It is best for users to quickly complete the estimation of conductor fatigue life without distinguishing the form of wind vibration by inputting the conductor model and the local wind speed probability.

[0061] To this end, the present application proposes a method for determining the fatigue life of a conductor. This method uses massive measured conductor wind load data combined with fatigue stress amplitude simulation analysis to avoid the fatigue stress amplitude deviation caused by the inability to accurately divide the conductor wind vibration morphology and the selection of an incorrect conductor wind vibration analysis model. It also establishes a fatigue life database for multiple types of conductors, so that the fatigue life of any conductor can be quickly obtained through query.

[0062] In order to better understand the present invention, the content of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0063] The present invention provides a method for determining the fatigue life of a conductor. Figure 1 As shown, including:

[0064] S1. Obtain wind speed data and transmission line conductor parameters in the area to be evaluated, and perform a probability analysis of wind speed distribution within a set period based on the wind speed data;

[0065] S2. Determine the number of stress fatigue cycles at the wind speed based on the wind speed distribution probability and the transmission line conductor parameters within the set time period combined with the pre-established relationship between wind speed and stress fatigue cycles;

[0066] S3, obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor;

[0067] Wherein, the relationship between the wind speed and the number of stress fatigue cycles is determined by simulating the power transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to the wind speed;

[0068] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0069] S1. Obtain wind speed data and transmission line conductor parameters in the area to be evaluated, and perform a probability analysis of wind speed distribution within a set period based on the wind speed data, specifically including:

[0070] Based on the statistical analysis of wind speed around the line, or the regional wind speed data provided by the meteorological department, a study on the probability of wind speed distribution at the line location is carried out.

[0071] Before step S2, the pre-constructed relationship between wind speed and stress fatigue cycle number involved in the present invention is introduced:

[0072] The determination of the relationship between wind speed and number of stress fatigue cycles includes:

[0073] Obtain the transmission line conductor model, common span and construction tension information of the area to be assessed;

[0074] Constructing a transmission line simulation analysis model based on the transmission line conductor model, common span, and construction tension information;

[0075] The average wind speed within the sampling period is grouped according to the set wind speed interval from 1m / s to the design wind speed of the transmission line;

[0076] Performing simulation analysis on the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each group of wind speeds, and obtaining the number of stress fatigue cycles corresponding to each group of wind speeds;

[0077] The relationship between the wind speed and the number of stress fatigue cycles is obtained from each group of wind speeds and the number of stress fatigue cycles.

[0078] Furthermore, the process of determining the equivalent high-frequency force time history corresponding to each set of wind speeds includes:

[0079] Apply each set of wind speeds to the conductor in turn, and collect the equivalent horizontal force component time history and vertical force component time history on the conductor cross section;

[0080] The equivalent high-frequency force time history on the cross section is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section of the conductor and the distance to the next cross section.

[0081] Furthermore, the equivalent high-frequency force time history on the cross section is calculated as follows:

[0082]

[0083] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the vertical force time history, l i is the distance from section i to section i+1.

[0084] This embodiment selects a certain type of conductor line, takes a sampling period of 10 minutes, and sets a time period of 1 year as an example for introduction:

[0085] like Figure 2 As shown in the figure, a laser radar capable of observing the wind field around the conductor is used to obtain a high-precision three-dimensional pulsating wind field around the wind-vibrated conductor; the pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located, and a macroscopic equivalent high-frequency force time series on a pre-specified measurement section (1 to N) is obtained with a sampling period of 10 minutes; corresponding to this macroscopic equivalent high-frequency force time series, the 10-minute average wind speed within a sampling period is calculated; the wind speed time series samples are grouped at intervals within a certain wind speed range; from 1m / s to the design wind speed range of the transmission line, all 10-minute equivalent high-frequency force time series are sorted and grouped according to the group to which the 10-minute average wind speed belongs.

[0086] Collect and organize the transmission line conductor models, common spans, and construction tension information in the assessment area. Based on the above information, group and classify typical conductors, and complete full-range conductor modeling separately.

[0087] Conduct actual measurements and wind load grouping; corresponding to a wind speed of 1m / s, randomly extract the equivalent high-frequency force time history on 1 to N sections within a 10-minute period within the 1m / s wind speed group, and apply the equivalent high-frequency force time history on the conductor according to the number and position of the measured sections; conduct wind-induced vibration response analysis of the conductor under the action of high-frequency time history forces, and extract the stress amplitude time history data at the hanging points at both ends of the conductor; cyclically extract any one wind speed within the range of 1m / s wind speed to the design wind speed, and then extract the equivalent high-frequency force time history on 1 to N sections within a 10-minute period within the wind speed group, and apply the equivalent high-frequency force time history on the conductor according to the number and position of the measured sections, and complete the wind-induced vibration response analysis of the conductor under all wind speeds, extract the stress amplitude time history data at the hanging points at both ends of the conductor under all wind speeds, and store them.

[0088] Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor are statistically analyzed to obtain the number of stress fatigue cycles under wind loads of various wind speed levels; the conductor model is changed and the above operation is repeated to establish the number of stress fatigue cycles within one year corresponding to the conductor model and wind speed.

[0089] S2. Determine the number of stress fatigue cycles at the wind speed based on the wind speed distribution probability and the transmission line conductor parameters within the set time period in combination with the pre-established relationship between wind speed and stress fatigue cycles, including:

[0090] Based on the conductor model and wind speed distribution probability in the transmission line conductor parameters, the relationship between the wind speed and the number of stress fatigue cycles corresponding to the conductor model and wind speed is selected to determine the number of stress fatigue cycles;

[0091] The number of stress fatigue cycles at the wind speed within a set time is obtained by multiplying the wind speed distribution probability by the number of stress fatigue cycles.

[0092] S3, based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor, obtaining the fatigue life of the conductor, comprising:

[0093] The fatigue life of the conductor is obtained by dividing the maximum fatigue cycle number of the conductor by the wind speed stress fatigue cycle number and then multiplying the result by the set time.

[0094] Step S3 specifically includes:

[0095] Based on the statistical analysis of wind speeds around the line or the regional wind speed data provided by the meteorological department, a study on the probability of wind speed distribution in the line location is carried out; based on the probability of occurrence of different wind speeds around the line and the number of stress cycles within one year corresponding to this wind speed, the number of stress cycles in one year under the actual operating environment of the line is calculated; based on the limit cycle number of the conductor, the fatigue life of this type of conductor in the actual operating environment of the area in years is estimated.

[0096] A method for determining the fatigue life of a conductor provided by the present invention further includes: storing the fatigue life of the conductor, the conductor model and the wind speed corresponding to the conductor in a database.

[0097] The fatigue life of any conductor can be quickly obtained by querying the database.

[0098] By inputting the conductor model and the local wind speed probability, the user can quickly complete the conductor fatigue life estimation without distinguishing the wind vibration form from the database.

[0099] Example 2

[0100] A specific example is used to introduce a method for quickly estimating the fatigue life of conductors without distinguishing the forms of wind vibration.

[0101] (1) Direct measurement and grouping of wind loads on wind-induced vibration conductors

[0102] 1) Select the lines in the area with more prominent wind vibration fatigue as the measurement research object, arrange the laser radar for wind field observation around the conductor, and Figure 1 The observation section shown is arranged with no less than 5 evenly distributed sections along the wire, and high-precision three-dimensional pulsating wind fields around the wind-vibrated wires of these 5 or more sections are obtained;

[0103] 2) Using the pressure integration method, the surrounding wind field in the plane where the conductor cross section is located is integrated, and the sampling period T is set. i The sampling frequency is 10 Hz and the equivalent horizontal force time history f on section i is collected. i(x，t) and vertical force time history f i(z，t) , if the distance from this section to the next section is l i , then the equivalent macroscopic high-frequency force time history on this section can be expressed as

[0104] 3) Corresponding to this macroscopic equivalent high-frequency force time history, calculate the sampling period T i Average wind speed within 10 minutes;

[0105] 4) Taking 1m / s as the wind speed range interval, the wind speed time history samples are grouped, and the wind speed grouping table obtained is shown in Table 1;

[0106] Table 1 Wind speed grouping table

[0107]

[0108]

[0109] 5) From 1m / s to the design wind speed range of the transmission line, all 10-minute equivalent high-frequency force time histories are sorted and grouped according to the group to which the 10-minute average wind speed belongs, and samples in different wind speed ranges are stored in groups.

[0110] (2) Wire classification statistics and modeling

[0111] Collect and organize the transmission line conductor models, common spans, and construction tension information in the assessment area. Based on the above information, group and classify typical conductors, and complete full-range conductor modeling separately.

[0112] Table 2 Transmission line conductor information collection table

[0113]

[0114]

[0115] (3) Calculation of typical conductor stress time history based on measured wind load time history

[0116] 1) A transmission line with a conductor model of LGJ-240 / 30, a construction tension of 16.9 kN, and a span of 300 m in the eastern part of Inner Mongolia was selected as the observation object, and the wind load measurement and wind load grouping described in (1) were carried out. During the measurement, wind load observations were carried out on 5 evenly distributed sections on the conductor with an interval of 50 m. 13,000 10-min pulsating wind speed time history data with a sampling frequency of 10 Hz were obtained from January 1, 2024 to March 31, 2024. After classification by group, the statistical table of grouping rules is shown in Table 3.

[0117] Table 3 Grouping table of measured wind speed on a certain line section in eastern Mengdong

[0118]

[0119]

[0120] 2) Establish a transmission line simulation analysis model with conductor model LGJ-240 / 30, construction tension 16.9kN, and span 300m.

[0121] 3) During the first calculation, in the wind speed range of 4m / s to 5m / s, from the 578 samples of group 4, the equivalent high-frequency force time history on 1 to 5 sections within a 10-min period was randomly selected, and the equivalent high-frequency force time history was applied at the 5 measured cross-sectional positions on the conductor respectively.

[0122] 4) Carry out wind vibration response analysis of the conductor under the action of high-frequency time-history force in the first case, within the wind speed range of 4m / s to 5m / s, and extract stress amplitude time-history data near the hanging points at both ends of the conductor.

[0123] 5) Increase the wind speed range to 5m / s~6m / s, and then extract the equivalent high-frequency force time history on 5 sections within a 10-minute period in the 5m / s~6m / s wind speed group, and apply the equivalent high-frequency force time history on the conductor according to the measured number and position of the sections.

[0124] 6) Cycle in sequence, gradually increase the wind speed range, and complete the wind vibration response analysis of the conductor under all wind speeds, extract the stress amplitude time history data near the hanging points at both ends of the conductor under all wind speeds, and store them.

[0125] (4) Establish a database of fatigue cycles corresponding to typical conductors and wind speeds

[0126] 1) Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor are statistically analyzed to obtain the number of stress fatigue cycles under wind loads of various wind speed levels as shown in Table 4.

[0127] Table 4 Number of stress fatigue cycles under wind load at various wind speed levels

[0128]

[0129]

[0130] 2) Change the conductor model, change the span, change the tension force, and repeat the above operations to establish the number of stress fatigue cycles within one year corresponding to the wind speed under various conductor models, tension forces and span conditions.

[0131] (5) Fatigue life estimation of any type of conductor under actual operating conditions

[0132] 1) Based on the statistical analysis of wind speed around the line, or the regional wind speed data provided by the meteorological department, conduct a probability analysis of wind speed distribution at the line location to determine the distribution probability of wind speeds at various levels as shown in Table 5.

[0133] Table 5 Probability statistics of wind speed distribution at all levels

[0134]

[0135] 2) Based on the probability of occurrence of different wind speeds around the line and the number of stress cycles within one year corresponding to this wind speed, the number of stress cycles in one year under the actual operating environment of the line is calculated.

[0136] Multiplying the probability percentage in Table 5 by the number of cycles corresponding to the wind speed magnitude in Table 4, we can obtain the number of stress cycles in one year under the actual operation environment of the line, which is 53609 times.

[0137] 3) Estimate the fatigue life of the conductor in years under the actual operating environment of the region based on the limit cycle number of the conductor.

[0138] The maximum number of fatigue cycles for this type of conductor is 2,000,000 times, so the fatigue life of this type of conductor is 37 years.

[0139] Example 3

[0140] The present invention based on the same inventive concept also provides a wire fatigue life determination system, comprising:

[0141] An acquisition module is used to acquire wind speed data and transmission line conductor parameters of the area to be evaluated, and perform a probability analysis of wind speed distribution within a set time period based on the wind speed data;

[0142] A cycle number determination module, used to determine the number of stress fatigue cycles under the wind speed based on the wind speed distribution probability and the transmission line conductor parameters in a set time period combined with a pre-established relationship between wind speed and stress fatigue cycle number;

[0143] A life calculation module, used for obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor;

[0144] Wherein, the relationship between the wind speed and the number of stress fatigue cycles is determined by simulating the power transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to the wind speed;

[0145] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0146] Optionally, a relationship determination module is also included, for:

[0147] Obtain the transmission line conductor model, common span and construction tension information of the area to be assessed;

[0148] Constructing a transmission line simulation analysis model based on the transmission line conductor model, common span, and construction tension information;

[0149] The average wind speed within the sampling period is grouped according to the set wind speed interval from 1m / s to the design wind speed of the transmission line;

[0150] Performing simulation analysis on the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each group of wind speeds, and obtaining the number of stress fatigue cycles corresponding to each group of wind speeds;

[0151] The relationship between the wind speed and the number of stress fatigue cycles is obtained from each group of wind speeds and the number of stress fatigue cycles.

[0152] Optionally, an equivalent high-frequency force time course determination module is also included, which is used to:

[0153] Apply each set of wind speeds to the conductor in turn, and collect the equivalent horizontal force component time history and vertical force component time history on the conductor cross section;

[0154] The equivalent high-frequency force time history on the cross section is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section of the conductor and the distance to the next cross section.

[0155] Optionally, the equivalent high-frequency force time history on the cross section is calculated as follows:

[0156]

[0157] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the vertical force component time history.

[0158] Optionally, the cycle number determination module is specifically used to:

[0159] Based on the conductor model and wind speed distribution probability in the transmission line conductor parameters, the relationship between the wind speed and the number of stress fatigue cycles corresponding to the conductor model and wind speed is selected to determine the number of stress fatigue cycles;

[0160] The number of stress fatigue cycles at the wind speed within a set time is obtained by multiplying the wind speed distribution probability by the number of stress fatigue cycles.

[0161] Optionally, the life calculation module is specifically used for:

[0162] The fatigue life of the conductor is obtained by dividing the maximum fatigue cycle number of the conductor by the wind speed stress fatigue cycle number and then multiplying the result by the set time.

[0163] Example 4

[0164] like Figure 3 As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected via a bus; the memory may be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory may also be used to store data, which may be called and / or modified when the instructions are executed.

[0165] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is used to implement one or more instructions, specifically to load and execute one or more instructions in a storage medium to implement a corresponding method flow or a corresponding function, so as to implement the steps of a method for determining fatigue life of a wire in the above-mentioned embodiment.

[0166] Example 5

[0167] Based on the same inventive concept, the present invention also provides a readable storage medium, specifically an electronic device readable storage medium (Memory), which is a memory device in the electronic device for storing programs and data. It can be understood that the storage medium here can include both the built-in storage medium in the electronic device and the extended storage medium supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of a method for determining the fatigue life of a wire in the above embodiment.

[0168] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0169] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0170] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0171] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0172] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A method for determining the fatigue life of a conductor, characterized in that: include: Obtain wind speed data and transmission line conductor parameters for the area to be assessed, and perform a probability analysis of wind speed distribution within a set period of time based on the wind speed data; Determine the number of stress fatigue cycles at the wind speed based on the wind speed distribution probability and the transmission line conductor parameters within the set time period combined with the pre-established relationship between wind speed and stress fatigue cycles; Based on the number of wind speed stress fatigue cycles and the maximum number of fatigue cycles of the conductor, the fatigue life of the conductor is obtained; Wherein, the relationship between the wind speed and the number of stress fatigue cycles is determined by simulating the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to the wind speed; The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

2. The method according to claim 1, characterized in that The determination of the relationship between wind speed and stress fatigue cycle number includes: Obtain the transmission line conductor model, common span and construction tension information of the area to be assessed; Constructing a transmission line simulation analysis model based on the transmission line conductor model, common span, and construction tension information; The average wind speed within the sampling period is grouped according to the set wind speed interval from 1m / s to the transmission line design wind speed range; Performing simulation analysis on the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each group of wind speeds, and obtaining the number of stress fatigue cycles corresponding to each group of wind speeds; The relationship between the wind speed and the number of stress fatigue cycles is obtained from each group of wind speeds and the number of stress fatigue cycles.

3. The method according to claim 2, characterized in that The process of determining the equivalent high-frequency force time history corresponding to each set of wind speeds includes: Apply each set of wind speeds to the conductor in turn, and collect the equivalent horizontal force component time history and vertical force component time history on the conductor cross section; The equivalent high-frequency force time history on the cross section is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section of the conductor and the distance to the next cross section.

4. The method according to claim 3, characterized in that The equivalent high-frequency force time history on the cross section is calculated as follows: In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the vertical force time history, l i is the distance from section i to section i+1.

5. The method according to claim 1, characterized in that The method of determining the number of stress fatigue cycles at the wind speed within the set time based on the wind speed distribution probability and the transmission line conductor parameters within the set time period in combination with the pre-established relationship between the wind speed and the number of stress fatigue cycles comprises: Based on the conductor model and wind speed distribution probability in the transmission line conductor parameters, the relationship between the wind speed and the number of stress fatigue cycles corresponding to the conductor model and wind speed is selected to determine the number of stress fatigue cycles; The number of stress fatigue cycles at the wind speed within a set time is obtained by multiplying the wind speed distribution probability by the number of stress fatigue cycles.

6. The method according to claim 1, characterized in that The step of obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor comprises: The fatigue life of the conductor is obtained by dividing the maximum fatigue cycle number of the conductor by the wind speed stress fatigue cycle number and then multiplying the result by the set time.

7. The method according to claim 1, characterized in that After obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor, the method further includes: The fatigue life of the conductor, the conductor model and the wind speed corresponding to the conductor are stored in a database.

8. A conductor fatigue life determination system, characterized in that: include: An acquisition module is used to acquire wind speed data and transmission line conductor parameters of the area to be evaluated, and perform a probability analysis of wind speed distribution within a set time period based on the wind speed data; A cycle number determination module, used to determine the number of stress fatigue cycles under the wind speed based on the wind speed distribution probability and the transmission line conductor parameters in a set time period combined with a pre-established relationship between wind speed and stress fatigue cycle number; A life calculation module, used for obtaining the fatigue life of the conductor based on the number of wind speed stress fatigue cycles combined with the maximum number of fatigue cycles of the conductor; Wherein, the relationship between the wind speed and the number of stress fatigue cycles is determined by simulating the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to the wind speed; The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

9. The system according to claim 8, characterized in that Also included is a relationship determination module for: Obtain the transmission line conductor model, common span and construction tension information of the area to be assessed; Constructing a transmission line simulation analysis model based on the transmission line conductor model, common span, and construction tension information; The average wind speed within the sampling period is grouped according to the set wind speed interval from 1m / s to the transmission line design wind speed range; Performing simulation analysis on the transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each group of wind speeds, and obtaining the number of stress fatigue cycles corresponding to each group of wind speeds; The relationship between the wind speed and the number of stress fatigue cycles is obtained from each group of wind speeds and the number of stress fatigue cycles.

10. The system according to claim 9, characterized in that Also included is an equivalent high frequency force time history determination module for: Apply each set of wind speeds to the conductor in turn, and collect the equivalent horizontal force component time history and vertical force component time history on the conductor cross section; The equivalent high-frequency force time history on the cross section is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section of the conductor and the distance to the next cross section.

11. The system according to claim 10, characterized in that The equivalent high-frequency force time history on the cross section is calculated as follows: In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the vertical force time history, l i is the distance from section i to section i+1.

12. The system of claim 8, wherein: The cycle number determination module is specifically used for: Based on the conductor model and wind speed distribution probability in the transmission line conductor parameters, the relationship between the wind speed and the number of stress fatigue cycles corresponding to the conductor model and wind speed is selected to determine the number of stress fatigue cycles; The number of stress fatigue cycles at the wind speed within a set time is obtained by multiplying the wind speed distribution probability by the number of stress fatigue cycles.

13. The system of claim 8, wherein: The life calculation module is specifically used for: The fatigue life of the conductor is obtained by dividing the maximum fatigue cycle number of the conductor by the wind speed stress fatigue cycle number and then multiplying the result by the set time.

14. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, the method for determining the fatigue life of a wire according to any one of claims 1 to 7 is implemented.

15. A readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, the method for determining the fatigue life of a wire according to any one of claims 1 to 7 is implemented.

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