Wire fatigue cycle index calculation method, system and equipment

Abstract

A wire fatigue cycle index calculation method, system and device comprises the steps of grouping wind speed time history samples in a sampling period according to a set wind speed interval from a set wind speed value to a power transmission line design wind speed range, and calculating an equivalent high-frequency force time history corresponding to each group of wind speed; performing simulation analysis on a pre-constructed power transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each group of wind speeds to obtain stress amplitude time history data of near hanging points at the two ends of the wire corresponding to each group of wind speeds; calculating the fatigue cycle times of the wire based on the stress amplitude time history data of the near hanging points at the two ends of the wire corresponding to each group of wind speeds; wherein the power transmission line simulation analysis model is constructed based on the power transmission line conductor model, the common span and the construction tension information. 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 disaster prevention and reduction of power transmission lines, and in particular to a method, system and device for calculating the number of fatigue cycles of a conductor. Background Art

[0002] Conductors in service are always under the influence of wind loads, and three types of vibrations may occur, including random vibrations, breeze vibrations under vortex excitation, and dancing under dancing loads. According to existing wind load calculation theories, different vibration forms require different wind load calculation models. Only by loading the conductor model and performing wind-induced force calculations 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 estimate the fatigue life of the conductor. However, in nature, it is not possible to distinguish the three wind-induced vibration states through actual measurements, nor is it possible to quantify the occurrence ratios of the three wind-induced vibration states. There is no unified wind load calculation model that can comprehensively consider the actual wind loads under the above three vibrations. Summary of the invention

[0003] In order to solve the problem that the prior art cannot distinguish the three wind vibration states through actual measurement, cannot quantify the occurrence ratio of the three wind vibration states, and does not have a unified wind load calculation model that can comprehensively consider the real wind load under the above three vibrations, the present invention proposes a method for calculating the number of fatigue cycles of a conductor, including:

[0004] From the set wind speed value to the design wind speed range of the transmission line, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval, and the equivalent high-frequency force time history corresponding to each group of wind speeds is calculated;

[0005] Based on the equivalent high-frequency force time history corresponding to each set of wind speeds, a pre-built transmission line simulation analysis model is simulated and analyzed to obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds;

[0006] Calculating the number of fatigue cycles of the conductor based on the stress amplitude time history data at both ends of the conductor near the hanging points corresponding to each group of wind speeds;

[0007] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0008] Preferably, within the range from the set wind speed value to the design wind speed of the transmission line, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval, and the equivalent high-frequency force time history corresponding to each group of wind speeds is calculated, including:

[0009] From the set wind speed value to the transmission line design wind speed range, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval;

[0010] The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds to obtain the equivalent high-frequency force time history corresponding to each group of wind speeds.

[0011] Preferably, the pressure integration method is used to perform pressure integration on the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds to obtain the equivalent high-frequency force time history corresponding to each group of wind speeds, including:

[0012] The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under the wind speed of each group, and the equivalent horizontal component force time history and vertical component force time history on the acquisition section at the set sampling frequency within the sampling period are obtained;

[0013] The equivalent high-frequency force time history corresponding to each set of wind speeds is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section and the distance from the cross section to the next cross section.

[0014] Preferably, the equivalent high-frequency force time history corresponding to each set of wind speeds is calculated as follows:

[0015] Equivalent high frequency force

[0016] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the time history of the equivalent vertical force component on section i, l i is the distance from this section to the next section.

[0017] Preferably, the calculating of the number of fatigue cycles of the conductor based on the stress amplitude time history data at the ends of the conductor near the hanging points corresponding to each group of wind speeds includes:

[0018] Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor were statistically analyzed to obtain the number of fatigue cycles under wind loads of each group of wind speed levels.

[0019] Preferably, the simulation analysis of the pre-built transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each set of wind speeds is performed to obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds, including:

[0020] Based on the equivalent high-frequency force time history corresponding to each group of wind speeds, according to the number and position of the measured sections, the equivalent high-frequency force time history is applied to the conductors of the pre-constructed transmission line simulation analysis model to perform conductor wind-induced vibration response analysis, and the stress amplitude time history data near the hanging points at both ends of the conductor are obtained.

[0021] In another aspect, the present invention further provides a wire fatigue cycle number calculation system, comprising:

[0022] A grouping module is used to group the average wind speed within the sampling period according to the set wind speed interval from the set wind speed value to the design wind speed range of the transmission line, and calculate the equivalent high-frequency force time history corresponding to each group of wind speeds;

[0023] A simulation module is used to simulate and analyze the pre-built transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each set of wind speeds, and obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds;

[0024] A calculation module, used for calculating the number of fatigue cycles of the conductor based on the stress amplitude time history data at both ends of the conductor near the hanging points corresponding to each group of wind speeds;

[0025] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0026] Preferably, the grouping module comprises:

[0027] The wind speed grouping submodule is used to group the average wind speed within the sampling period according to the set wind speed interval within the range from the set wind speed value to the design wind speed of the transmission line;

[0028] The elevation calculation submodule is used to use the pressure integration method to perform pressure integration on the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds, and obtain the equivalent high-frequency force time history corresponding to each group of wind speeds.

[0029] Preferably, the elevation calculation submodule is specifically used for:

[0030] The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under the wind speed of each group, and the equivalent horizontal component force time history and vertical component force time history on the acquisition section at the set sampling frequency within the sampling period are obtained;

[0031] The equivalent high-frequency force time history corresponding to each set of wind speeds is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section and the distance from the cross section to the next cross section.

[0032] Preferably, the equivalent high-frequency force time history corresponding to each set of wind speeds is calculated as follows:

[0033] Equivalent high frequency force

[0034] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the time history of the equivalent vertical force component on section i, l i is the distance from this section to the next section.

[0035] Preferably, the calculation module is specifically used for:

[0036] Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor were statistically analyzed to obtain the number of fatigue cycles under wind loads of each group of wind speed levels.

[0037] Preferably, the simulation module is specifically used for:

[0038] Based on the equivalent high-frequency force time history corresponding to each group of wind speeds, according to the number and position of the measured sections, the equivalent high-frequency force time history is applied to the conductors of the pre-constructed transmission line simulation analysis model to perform conductor wind-induced vibration response analysis, and the stress amplitude time history data near the hanging points at both ends of the conductor are obtained.

[0039] 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;

[0040] The memory is used to store one or more programs;

[0041] When the one or more programs are executed by the at least one processor, a method for calculating the number of fatigue cycles of a wire as described above is implemented.

[0042] On the other hand, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed, a method for calculating the number of fatigue cycles of a wire as described above is implemented.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The present invention provides a method, system and device for calculating the number of fatigue cycles of a conductor, including: from a set wind speed value to a design wind speed range of a transmission line, grouping wind speed time series samples within a sampling period according to a set wind speed interval, and calculating the equivalent high-frequency force time series corresponding to each group of wind speeds; simulating and analyzing a pre-constructed transmission line simulation analysis model based on the equivalent high-frequency force time series corresponding to each group of wind speeds, and obtaining stress amplitude time series data at both ends of the conductor near the hanging point corresponding to each group of wind speeds; calculating the number of fatigue cycles of the conductor based on the stress amplitude time series data at both ends of the conductor near the hanging point corresponding to each group of wind speeds; wherein the transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information. The present invention avoids 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 through massive measured conductor wind load data combined with fatigue stress amplitude simulation analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A flow chart of a method for calculating the number of fatigue cycles of a conductor according to the present invention;

[0046] Figure 2 It is a schematic diagram of a high-precision three-dimensional pulsating wind field observation cross section around the wind-vibrated wire of the present invention;

[0047] Figure 3 The figure is a schematic diagram of the structure of an electronic device of the present invention. DETAILED DESCRIPTION

[0048] In order to improve the accuracy of fatigue life calculation of wind-induced conductors, it is necessary to complete the actual measurement of wind loads on massive conductors under the premise of considering the influence of line operation environment, and use this as input condition to obtain the actual stress amplitude of wind-induced conductors, and then use appropriate stress cycle statistical algorithm to obtain the number of conductor fatigue cycles under certain time period and wind speed conditions.

[0049] To this end, the present invention proposes a method for calculating the number of conductor fatigue cycles that takes into account the influence of the line operating environment. 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 any conductor can quickly obtain the fatigue life by query, thereby getting rid of the limitations of the theoretical calculation model, greatly improving the accuracy of the conductor fatigue life cycle number, and improving the feasibility of screening high-risk points of conductor fatigue.

[0050] 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.

[0051] Embodiment 1:

[0052] A method for calculating the number of conductor fatigue cycles, such as Figure 1 As shown, including:

[0053] Step S1: from the set wind speed value to the transmission line design wind speed range, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval, and the equivalent high-frequency force time history corresponding to each group of wind speeds is calculated;

[0054] Step S2: Based on the equivalent high-frequency force time history corresponding to each set of wind speeds, a pre-constructed transmission line simulation analysis model is simulated and analyzed to obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds;

[0055] Step S3: calculating the number of fatigue cycles of the conductor based on the stress amplitude time history data at both ends of the conductor near the hanging points corresponding to each group of wind speeds;

[0056] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0057] The present invention provides a method for calculating the number of fatigue cycles of a conductor. The method takes into account the influence of the line operation environment and can be used for calculating the number of fatigue cycles of a conductor within a certain wind speed and time period on the premise that a large number of actual wind load measurements and load history measurements of the conductors have been carried out.

[0058] The specific implementation steps and analysis methods are as follows:

[0059] Step S1: from the set wind speed value to the transmission line design wind speed range, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval, and the equivalent high-frequency force time history corresponding to each group of wind speeds is calculated, including:

[0060] From the set wind speed value to the transmission line design wind speed range, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval;

[0061] The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds to obtain the equivalent high-frequency force time history corresponding to each group of wind speeds.

[0062] Furthermore, the pressure integration method is used to perform pressure integration on the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds to obtain the equivalent high-frequency force time history corresponding to each group of wind speeds, including:

[0063] The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under the wind speed of each group, and the equivalent horizontal component force time history and vertical component force time history on the acquisition section at the set sampling frequency within the sampling period are obtained;

[0064] The equivalent high-frequency force time history corresponding to each set of wind speeds is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section and the distance from the cross section to the next cross section.

[0065] Furthermore, the equivalent high-frequency force time history corresponding to each set of wind speeds is calculated as follows:

[0066] Equivalent high frequency force

[0067] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the time history of the equivalent vertical force component on section i, l i is the distance from this section to the next section.

[0068] Step S1 specifically includes:

[0069] (1) Direct measurement and grouping of wind loads on wind-induced vibration conductors

[0070] 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 perform pressure integration on the surrounding wind field in the plane where the conductor cross section is located. With a sampling period of 10 minutes, the macroscopic equivalent high-frequency force time series on the pre-specified measurement section (1 to N) is obtained. 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 the set wind speed value, the set wind speed value here is 1m / s, that is, 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.

[0071] Before step S2, it also includes building a transmission line simulation analysis model, and the construction process of the model is as follows:

[0072] (2) Wire classification statistics and modeling

[0073] 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.

[0074] Step S2: Based on the equivalent high-frequency force time history corresponding to each set of wind speeds, a simulation analysis is performed on the pre-constructed transmission line simulation analysis model to obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds, including:

[0075] Based on the equivalent high-frequency force time history corresponding to each group of wind speeds, according to the number and position of the measured sections, the equivalent high-frequency force time history is applied to the conductors of the pre-constructed transmission line simulation analysis model to perform conductor wind-induced vibration response analysis, and the stress amplitude time history data near the hanging points at both ends of the conductor are obtained.

[0076] Step S2 specifically includes:

[0077] (3) Calculation of typical conductor stress time history based on measured wind load time history

[0078] Select a line of a certain type of conductor and carry out the actual measurement and wind load grouping described in (1); corresponding to a wind speed of 1 m / s, randomly extract the equivalent high-frequency force time history on 1 to N sections within a 10-min period in the 1 m / 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; carry out wind vibration response analysis of the conductor under the action of high-frequency time history force, 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 1 m / 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-min period in 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 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.

[0079] Step S3: Calculating the number of fatigue cycles of the conductor based on the stress amplitude time history data at the ends of the conductor near the hanging points corresponding to each group of wind speeds, including:

[0080] Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor were statistically analyzed to obtain the number of fatigue cycles under wind loads of each group of wind speed levels.

[0081] Step S3 specifically includes:

[0082] (4) Establish the calculation method of fatigue cycle number corresponding to typical conductor and wind speed

[0083] 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.

[0084] Example 2

[0085] This paper introduces the calculation method of conductor fatigue cycle number based on the influence of line operation environment by using specific examples.

[0086] (1) Direct measurement and grouping of wind loads on wind-induced vibration conductors

[0087] 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 2 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;

[0088] 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. iThe 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

[0089] 3) Corresponding to this macroscopic equivalent high-frequency force time history, calculate the sampling period T i Average wind speed within 10 minutes;

[0090] 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;

[0091] Table 1 Wind speed grouping table

[0092]

[0093] 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.

[0094] (2) Wire classification statistics and modeling

[0095] The transmission line conductor models, common spans, and construction tension information in the assessment area were collected and sorted. Based on the above information, typical conductors were grouped and classified, and full-scale conductor modeling was completed separately, as shown in Table 2.

[0096] Table 2 Transmission line conductor information collection table

[0097] Lead wire model Gear spacing (m) Construction tension (kN) Lead wire model Gear spacing (m) Construction tension (kN) LGJ-240 / 30 300 16.7 LGJ-800 / 100 600 56.1 LGJ-240 / 30 350 16.9 LGJ-800 / 100 650 56.3 LGJ-240 / 30 400 17.1 LGJ-800 / 100 700 56.4 LGJ-240 / 55 300 22.6 LGJ-800 / 70 600 48.2 LGJ-240 / 55 350 22.8 LGJ-800 / 70 650 48.3 LGJ-240 / 55 400 23.1 LGJ-800 / 70 700 48.4 LGJ-300 / 20 350 17.0 LGJ-800 / 55 600 44.6 LGJ-300 / 20 400 17.2 LGJ-800 / 55 650 44.7 LGJ-300 / 20 450 17.3 LGJ-800 / 55 700 44.8

[0098] (3) Calculation of typical conductor stress time history based on measured wind load time history

[0099] 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.

[0100] Table 3 Grouping table of measured wind speed on a certain line section in eastern Inner Mongolia

[0101]

[0102]

[0103] 2) Establish a transmission line simulation analysis model with conductor model LGJ-240 / 30, construction tension 16.9kN, and span 300m.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] (4) Establish the fatigue cycle number corresponding to the typical conductor and wind speed

[0109] 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.

[0110] Table 4 Number of stress fatigue cycles under wind load at various wind speed levels

[0111] Stress cycle number Stress cycle number Stress cycle number Group 1 0 Group 8 7107 Group 15 13476 Group 2 0 Group 9 12292 Group 16 8353 Group 3 0 Group 10 10646 Group 17 6123 Group 4 8892 Group 11 7369 Group 18 12158 Group 5 10646 Group 12 6758 Group 19 9838 Group 6 13230 Group 13 9030 Group 20 11408 Group 7 11092 Group 14 9769 Group 21 8865 Stress cycle number Stress cycle number Group 22 6800 Group 29 923 Group 36 0 Group 23 5200 Group 30 692 Group 37 0 Group 24 1861 Group 31 535 Group 38 0 Group 25 1830 Group 32 538 Group 39 0 Group 26 707 Group 33 384 Group 40 0 Group 27 1153 Group 34 384 Group 41 0 Group 28 1538 Group 35 386 Group 42 0

[0112] 2) Change the conductor model, change the span, change the tension, and repeat the above operations to establish the number of stress fatigue cycles within 1 year corresponding to the wind speed under various conductor models, tension and span conditions. (1) Obtaining the stress amplitude of wind-vibrated conductors based on measured data: In order to improve the accuracy of fatigue life calculation of wind-vibrated conductors, it is proposed to obtain the actual stress amplitude of the conductor by actually measuring the wind load on a large number of conductors without distinguishing the wind vibration form.

[0113] (2) Establishing a conductor fatigue life cycle database: In order to better support user needs, a method is proposed to establish a conductor fatigue cycle database with a large number of samples of different models. Users can quickly obtain the conductor fatigue cycle number based on the conductor model and the probability of occurrence of local wind speed.

[0114] Example 3

[0115] The present invention based on the same inventive concept also provides a wire fatigue cycle number calculation system, comprising:

[0116] A grouping module is used to group the average wind speed within the sampling period according to the set wind speed interval from the set wind speed value to the design wind speed range of the transmission line, and calculate the equivalent high-frequency force time history corresponding to each group of wind speeds;

[0117] A simulation module is used to simulate and analyze the pre-built transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each set of wind speeds, and obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds;

[0118] A calculation module, used for calculating the number of fatigue cycles of the conductor based on the stress amplitude time history data at both ends of the conductor near the hanging points corresponding to each group of wind speeds;

[0119] The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

[0120] Preferably, the grouping module comprises:

[0121] The wind speed grouping submodule is used to group the average wind speed within the sampling period according to the set wind speed interval within the range from the set wind speed value to the design wind speed of the transmission line;

[0122] The elevation calculation submodule is used to use the pressure integration method to perform pressure integration on the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds, and obtain the equivalent high-frequency force time history corresponding to each group of wind speeds.

[0123] Preferably, the elevation calculation submodule is specifically used for:

[0124] The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under the wind speed of each group, and the equivalent horizontal component force time history and vertical component force time history on the acquisition section at the set sampling frequency within the sampling period are obtained;

[0125] The equivalent high-frequency force time history corresponding to each set of wind speeds is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section and the distance from the cross section to the next cross section.

[0126] Preferably, the equivalent high-frequency force time history corresponding to each set of wind speeds is calculated as follows:

[0127] Equivalent high frequency force

[0128] In the formula, f i(x，t) is the equivalent horizontal force time history on section i, f i(z，t) is the time history of the equivalent vertical force component on section i, l i is the distance from this section to the next section.

[0129] Preferably, the calculation module is specifically used for:

[0130] Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor were statistically analyzed to obtain the number of fatigue cycles under wind loads of each group of wind speed levels.

[0131] Preferably, the simulation module is specifically used for:

[0132] Based on the equivalent high-frequency force time history corresponding to each group of wind speeds, according to the number and position of the measured sections, the equivalent high-frequency force time history is applied to the conductors of the pre-constructed transmission line simulation analysis model to perform conductor wind-induced vibration response analysis, and the stress amplitude time history data near the hanging points at both ends of the conductor are obtained.

[0133] Example 3

[0134] 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.

[0135] 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 suitable for implementing one or more instructions, and is specifically suitable for loading and executing 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 calculating the number of fatigue cycles of a wire in the above-mentioned embodiment.

[0136] Example 4

[0137] 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 suitable 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 calculating the number of fatigue cycles of a wire in the above embodiment.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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 The steps for the functions specified in one or more boxes.

[0142] 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 calculating the number of fatigue cycles of a conductor, characterized in that: include: From the set wind speed value to the design wind speed range of the transmission line, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval, and the equivalent high-frequency force time history corresponding to each group of wind speeds is calculated; Based on the equivalent high-frequency force time history corresponding to each set of wind speeds, a pre-built transmission line simulation analysis model is simulated and analyzed to obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds; Calculating the number of fatigue cycles of the conductor based on the stress amplitude time history data at both ends of the conductor near the hanging points corresponding to each group of wind speeds; 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 wind speed time series samples within the sampling period are grouped according to the set wind speed interval within the range from the set wind speed value to the design wind speed of the transmission line, and the equivalent high-frequency force time series corresponding to each group of wind speeds is calculated, including: From the set wind speed value to the transmission line design wind speed range, the wind speed time history samples within the sampling period are grouped according to the set wind speed interval; The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds to obtain the equivalent high-frequency force time history corresponding to each group of wind speeds.

3. The method according to claim 2, characterized in that The pressure integration method is used to perform pressure integration on the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds to obtain the equivalent high-frequency force time history corresponding to each group of wind speeds, including: The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under the wind speed of each group, and the equivalent horizontal component force time history and vertical component force time history on the acquisition section at the set sampling frequency within the sampling period are obtained; The equivalent high-frequency force time history corresponding to each set of wind speeds is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section and the distance from the cross section to the next cross section.

4. The method according to claim 3, characterized in that The equivalent high-frequency force time history corresponding to each set of wind speeds 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 time history of the equivalent vertical force component on section i, l i is the distance from this section to the next section.

5. The method according to claim 1, characterized in that The calculating of the number of fatigue cycles of the conductor based on the stress amplitude time history data at both ends of the conductor near the hanging points corresponding to each group of wind speeds includes: Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor were statistically analyzed to obtain the number of fatigue cycles under wind loads of each group of wind speed levels.

6. The method according to claim 1, characterized in that The pre-built transmission line simulation analysis model is simulated and analyzed based on the equivalent high-frequency force time history corresponding to each set of wind speeds to obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds, including: Based on the equivalent high-frequency force time history corresponding to each group of wind speeds, according to the number and position of the measured sections, the equivalent high-frequency force time history is applied to the conductors of the pre-constructed transmission line simulation analysis model to perform conductor wind-induced vibration response analysis, and the stress amplitude time history data near the hanging points at both ends of the conductor are obtained.

7. A conductor fatigue cycle calculation system, characterized in that: include: A grouping module is used to group the average wind speed within the sampling period according to the set wind speed interval from the set wind speed value to the design wind speed range of the transmission line, and calculate the equivalent high-frequency force time history corresponding to each group of wind speeds; A simulation module is used to simulate and analyze the pre-built transmission line simulation analysis model based on the equivalent high-frequency force time history corresponding to each set of wind speeds, and obtain stress amplitude time history data at both ends of the conductor near the hanging point corresponding to each set of wind speeds; A calculation module, used for calculating the number of fatigue cycles of the conductor based on the stress amplitude time history data at both ends of the conductor near the hanging points corresponding to each group of wind speeds; The transmission line simulation analysis model is constructed based on the transmission line conductor model, common span, and construction tension information.

8. The system according to claim 7, characterized in that The grouping module comprises: The wind speed grouping submodule is used to group the average wind speed within the sampling period according to the set wind speed interval within the range from the set wind speed value to the design wind speed of the transmission line; The elevation calculation submodule is used to use the pressure integration method to perform pressure integration on the surrounding wind field in the plane where the conductor cross section is located under each group of wind speeds, and obtain the equivalent high-frequency force time history corresponding to each group of wind speeds.

9. The system according to claim 8, characterized in that The elevation calculation submodule is specifically used for: The pressure integration method is used to integrate the surrounding wind field in the plane where the conductor cross section is located under the wind speed of each group, and the equivalent horizontal component force time history and vertical component force time history on the acquisition section at the set sampling frequency within the sampling period are obtained; The equivalent high-frequency force time history corresponding to each set of wind speeds is calculated based on the equivalent horizontal force time history and vertical force time history on the cross section and the distance from the cross section to the next cross section.

10. The system according to claim 9, characterized in that The equivalent high-frequency force time history corresponding to each set of wind speeds 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 time history of the equivalent vertical force component on section i, l i is the distance from this section to the next section.

11. The system according to claim 7, characterized in that The calculation module is specifically used for: Based on the rain flow counting method, the stress amplitude time history data near the hanging points at both ends of the conductor were statistically analyzed to obtain the number of fatigue cycles under wind loads of each group of wind speed levels.

12. The system according to claim 7, characterized in that The simulation module is specifically used for: Based on the equivalent high-frequency force time history corresponding to each group of wind speeds, according to the number and position of the measured sections, the equivalent high-frequency force time history is applied to the conductors of the pre-constructed transmission line simulation analysis model to perform conductor wind-induced vibration response analysis, and the stress amplitude time history data near the hanging points at both ends of the conductor are obtained.

13. 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, a method for calculating the number of fatigue cycles of a wire according to any one of claims 1 to 6 is implemented.

14. A readable storage medium, characterized in that: An execution program is stored thereon, and when the execution program is executed, a method for calculating the number of fatigue cycles of a wire as described in any one of claims 1 to 6 is implemented.

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