Eight-bundle power transmission line galloping detection method considering strain insulator string

Abstract

The invention relates to the technical field of electrical engineering, in particular to an eight-bundle power transmission line galloping detection method considering a strain insulator string. According to the method, a vibration sensor is installed on a strain insulator string, three-dimensional displacement sensors are arranged on eight strands of sub-conductors, and a remote intelligent platform is constructed for data processing. The platform sets an amplitude galloping ratio R, and a model is established according to related parameters to obtain a galloping threshold. When the vibration sensor detects that the amplitude exceeds the specific value, the motion data of the sub-conductor is recorded, whether the sub-conductor is touched or not is judged, and a worker is informed. Meanwhile, the platform estimates motion data to calculate overall and single galloping values, and if the values exceed a threshold value after comparison with the threshold value, a worker is notified. The method has an accurate calculation formula and rigorous steps, multi-sensor cooperative monitoring and scientific galloping condition judgment are achieved, and powerful support is provided for guaranteeing safe and stable operation of a power system.

Description

Technical Field

[0001] The present invention relates to the field of electrical engineering technology, and in particular to a method for detecting galloping of an eight-split transmission line taking into account a tension insulator string. Background Art

[0002] With the rapid economic development and the growing demand for electricity in society, the stability and reliability of power transmission have become crucial. As an efficient way of power transmission, eight-split transmission lines have been widely used in modern power systems. However, under certain meteorological conditions, eight-split transmission lines are susceptible to the galloping phenomenon, which poses a huge challenge to the safe operation of power systems. Galloping refers to the large-amplitude, low-frequency vibration phenomenon of transmission line conductors under the action of wind. When strong winds interact with ice on the surface of transmission line conductors, it may cause the galloping of conductors. Due to the particularity of their structure, eight-split transmission lines are more susceptible to galloping. Galloping not only causes fatigue damage to conductors, damage to hardware, and tilting of towers, but may also cause accidents such as line tripping and power outages, seriously affecting the normal operation of the power system. Traditional transmission line galloping detection methods mainly focus on monitoring the conductors themselves, such as measuring the vibration parameters of the conductors through equipment such as accelerometers and displacement sensors installed on the conductors. However, these methods often ignore the important role of tension insulator strings in the galloping process. The tension insulator string is an important component that connects the transmission line conductor and the tower. It not only plays an insulating role, but also bears the tension of the conductor. During the dancing process, the tension insulator string will move with the conductor, and its mechanical properties and movement state will have an important impact on the dancing of the conductor.

[0003] The structural complexity of the eight-strand transmission line also increases the difficulty of galloping detection. The interaction between the eight strands of conductors and the coordinated movement with the tension insulator string make it difficult for traditional detection methods to accurately judge the galloping situation. At the same time, since the eight-strand transmission line usually spans a long distance and is distributed under different terrain and meteorological conditions, it also poses a great challenge to galloping detection.

[0004] Description

[0005] In order to solve the shortcomings of the traditional galloping detection method and improve the accuracy and reliability of the galloping detection of the eight-split transmission line, the present invention proposes the following technical solutions:

[0006] A method for detecting galloping of an eight-split transmission line considering a tension insulator string, characterized in that it comprises the following steps:

[0007] S1: Vibration sensors are carefully installed on the tension insulator strings. At the same time, three-dimensional displacement sensors are installed on the eight sub-conductors of the eight-split transmission line. Subsequently, each three-dimensional displacement sensor is precisely controlled, and the origin coordinates of each three-dimensional displacement sensor are set to the position of the corresponding sub-conductor when it is in a static state. This setting can provide a reliable benchmark for the subsequent accurate measurement of the displacement changes of the sub-conductors.

[0008] S2: Build a remote intelligent platform and connect the three-dimensional displacement sensor and vibration sensor to the platform. Set the amplitude galloping ratio R, build a model based on the relevant parameters of the tension insulator string and the eight-split transmission line, and then derive the overall galloping threshold and the single-unit galloping threshold. The determination of these thresholds is based on a comprehensive analysis of various characteristics of the transmission line and will serve as an important criterion for judging the severity of the galloping situation.

[0009] S3: When the amplitude detected by the vibration sensor exceeds the set amplitude dancing ratio R, it is initially determined that dancing may occur. At this time, the remote intelligent platform will periodically record according to the set time interval and continuously record the movement data of each sub-conductor. In this way, the dynamic changes in the dancing process can be captured in time, providing rich data support for subsequent analysis.

[0010] S4: The remote intelligent platform strictly determines whether the sub-conductors of the eight-split transmission line touch each other based on the recorded motion data. Once it is determined that the sub-conductors of the eight-split transmission line touch each other, the remote intelligent platform will quickly notify the staff. This ensures that when potential dangerous situations occur, appropriate measures can be taken in time to ensure the safe operation of the transmission line.

[0011] S5: The remote intelligent platform accurately estimates the detected motion data and calculates the individual dance value of each line and the overall dance value. The overall dance value is calculated based on the individual dance value of each line. Then, the overall dance value is compared with the overall dance threshold, and the individual dance value is compared with the individual dance threshold. When the overall dance value exceeds the overall dance threshold or the individual dance value exceeds the individual dance threshold, the remote intelligent platform will promptly notify the staff so that effective countermeasures can be taken.

[0012] 2. A method for detecting the galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that, in said S2, when setting the amplitude galloping ratio R, the relevant expression is as follows:

[0013]

[0014] In the formula, A min Indicates the minimum amplitude value when the line is dancing. Indicates the normal wind speed in the area, L indicates the length of the sub-conductor, F average It represents the average tension of the line during normal operation, k1, k2, k3 are weighting coefficients, and v represents the amplitude factor fine-tuning factor set according to experience; among them, k1, k2, k3 sum to 1; the smaller the value of ∈, the smaller R.

[0015] 3. The method for detecting galloping of eight-split transmission lines considering tension insulator strings according to claim 1, characterized in that in said S2, when calculating the single-cell galloping threshold T dance , overall dancing threshold T total When , the relevant expressions are as follows:

[0016]

[0017] T total =k5×F item +k6×n×T dance ,

[0018] In the formula, x max Indicates, y max Indicates that T strength represents the tensile strength of the sub-conductor, m represents the weight of a single sub-conductor of an eight-split transmission line, L represents the average length of the sub-conductor of an eight-split transmission line, T dance represents the monomer dancing threshold, F item It represents the tensile strength of the tension insulator string. k1, k2, k3, k4, k5 and k6 are the set weighting coefficients. Among them, the total of k1, k2, k3 and k4 is 1; the total of k5 and k6 is 1.

[0019] 4. A method for detecting the swaying of an eight-split transmission line taking into account a string of tension insulators according to claim 1, characterized in that, in said S1, when regulating each three-dimensional displacement sensor, the origin coordinates of each three-dimensional displacement sensor are set to the position of the corresponding sub-conductor in a static state; when each three-dimensional displacement sensor detects the corresponding sub-conductor motion data, what is detected is a data point in the two-dimensional coordinates in the left-right direction and the up-down direction based on the origin coordinates.

[0020] 5. The method for detecting galloping of eight-split transmission lines considering tension insulator strings according to claim 1, characterized in that, in said S3, the relevant expression of the time interval is as follows:

[0021]

[0022] Where A represents the vibration amplitude detected by the vibration sensor, f represents the sampling frequency of the vibration sensor, m represents the weight of a single sub-conductor of the eight-split transmission line, L represents the average length of the sub-conductor of the eight-split transmission line, and w1 represents the interval control factor set according to experience; wherein w1 is greater than 0 and less than 1; the smaller the value of w1, the smaller the value of T.

[0023] 6. A method for detecting galloping of eight-split transmission lines taking into account tension insulator strings according to claim 1, characterized in that in said S4, when determining whether there is contact between the eight-split transmission lines, the specific steps are as follows:

[0024] S41: numbering each sub-conductor of the eight-split transmission line from left to right in sequence, and establishing associations with movement data of each sub-conductor;

[0025] S42: extracting the coordinate information of each sub-conductor except the eighth sub-conductor and the coordinate information of the first line adjacent to the right thereof;

[0026] S43: according to the data extracted in S42, respectively calculating the two-line position relationship measurement value of the coordinate information of the first sub-conductor adjacent to the right side of each sub-conductor except the eighth sub-conductor;

[0027] S44: Combine the leader position relationship measurement values ​​of each line calculated in S43 into a set, and compare the values ​​in the set with the set touch threshold d min Compare, when there is a greater than or equal d in the set min When the value is greater than , it is considered that there is contact between the eight-split transmission lines.

[0028] 7. A method for detecting galloping of eight-split transmission lines considering a tension insulator string according to claim 5, characterized in that, in said S42, when calculating the leader position relationship measurement value d between a sub-conductor and the first sub-conductor adjacent to its right side, the specific expression is as follows:

[0029] d=(x1-x2|×|y1-y2|,

[0030] In the formula, x1 represents the left-right coordinate value of the motion data of the sub-conductor to be calculated, y1 represents the up-down coordinate value of the motion data of the sub-conductor to be calculated, x2 represents the left-right coordinate value of the motion data of the first line adjacent to the right side of the sub-conductor to be calculated, and y2 represents the up-down coordinate value of the motion data of the first line adjacent to the right side of the sub-conductor to be calculated.

[0031] 8. A method for detecting galloping of eight-split transmission lines taking into account tension insulator strings according to claim 5, characterized in that, in said S44, the touch determination value E is expressed as follows:

[0032] d min =|n-r1)×(m-r2|,

[0033] Wherein, n represents the distance between the sub-conductor to be calculated and the first sub-conductor adjacent to its right side in the left-right direction, m represents the distance between the sub-conductor to be calculated and the first sub-conductor adjacent to its right side in the up-down direction, r1 represents the radius of the sub-conductor to be calculated, and r2 represents the radius of the first sub-conductor adjacent to the right side of the sub-conductor to be calculated.

[0034] 9. The method for detecting galloping of eight-split transmission lines considering tension insulator strings according to claim 1, characterized in that in said S5, when calculating the single-cell galloping value, the relevant expression is as follows:

[0035]

[0036] In the formula, x max Indicates the maximum coordinate value of the left and right direction of the sub-conductor within 5 seconds, x min Indicates the minimum coordinate value of the left and right direction of the sub-conductor within 5 seconds, y max Indicates the maximum coordinate value of the sub-conductor in the up and down direction within 5 seconds, y min It represents the minimum coordinate value of the sub-conductor in the up and down direction within 5 seconds, m represents the weight of a single sub-conductor of the eight-split transmission line, L represents the average length of the sub-conductor of the eight-split transmission line, k1 and k2 are weighting coefficients, where the total of k1 and k2 is 1.

[0037] 10. The method for detecting galloping of eight-split transmission lines considering tension insulator strings according to claim 1, characterized in that in said S5, when calculating the overall galloping value, the relevant expression is as follows:

[0038]

[0039] Where D i represents the dancing value of the i-th line in the set D = {D1, D2, D3, D4, D5, D6, D7, D8}, A max It represents the maximum vibration amplitude value that occurs in 5 seconds, k1 and k2 are the set weighting coefficients; among them, the value range of k1 is 0.7-0.9, the value range of k2 is 0.1-0.3, and the sum of k1 and k2 is 1; the set D is the single-body dancing value of each of the eight sub-conductors of the eight-split transmission line.

[0040] The beneficial effects of the present invention are:

[0041] 1. The multi-sensor collaborative monitoring of the present invention realizes comprehensive monitoring. By installing vibration sensors on the tension insulator string and installing three-dimensional displacement sensors on the eight strands of conductors, the conductor movement and the vibration information of the tension insulator string can be detected, and the galloping state of the transmission line can be fully understood.

[0042] 2. The present invention collects two-dimensional coordinate data and provides rich data. When detecting the corresponding sub-conductor motion data, each three-dimensional displacement sensor collects data points in the two-dimensional coordinates determined in the left-right direction and the up-down direction based on the origin coordinates, accurately reflecting the sub-conductor plane motion, and providing rich data for subsequent analysis and judgment.

[0043] 3. The present invention sets the threshold scientifically to improve the accuracy of judgment. A model is established based on the parameters related to the tension insulator string and the eight-split transmission line to obtain the overall galloping threshold and the single-unit galloping threshold. The threshold calculation takes into account multiple key factors, making the threshold setting more scientific and reasonable, and improving the accuracy of galloping judgment.

[0044] 4. The present invention accurately calculates the galloping value and provides a reliable basis. Through a series of precise calculation formulas, such as the expression for calculating the single-unit galloping value and the overall galloping value, the galloping degree of the transmission line is accurately quantified, providing a reliable basis for judging the galloping situation.

[0045] 5. The present invention can accurately judge whether there is a touch between the sub-conductors of the eight-split transmission line, and can timely discover potential safety hazards. When judging whether there is a touch between the sub-conductors of the eight-split transmission line, rigorous steps and calculation formulas are used to accurately judge whether there is a touch between the sub-conductors, and to timely discover potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 The present invention is a schematic diagram of the steps of a method for detecting galloping of an eight-split transmission line taking into account a string of tension insulators.

[0047] Figure 2 The present invention is a schematic diagram of the steps of determining whether there is contact between eight-split transmission lines according to a method for detecting galloping of eight-split transmission lines taking into account tension insulator strings. DETAILED DESCRIPTION

[0048] A method for detecting galloping of an eight-split transmission line considering a tension insulator string, characterized in that it comprises the following steps:

[0049] S1: Install vibration sensors on the tension insulator string, and install three-dimensional displacement sensors on the eight sub-conductors of the eight-split transmission line respectively, and adjust each three-dimensional displacement sensor, and set the origin coordinates of each three-dimensional displacement sensor to the position of the corresponding sub-conductor in a static state; when adjusting each three-dimensional displacement sensor, set the origin coordinates of each three-dimensional displacement sensor to the position of the corresponding sub-conductor in a static state; when each three-dimensional displacement sensor detects the corresponding sub-conductor movement data, what is detected is the data point in the two-dimensional coordinate determined in the left-right direction and the up-down direction based on the origin coordinates.

[0050] Vibration sensors are installed on tension insulator strings and are mainly used to monitor the vibration of insulator strings and nearby transmission lines. When the transmission line is stimulated by natural environments such as wind, rain, and snow, or vibrates due to current load changes, mechanical failures, etc., the vibration sensor can capture these vibration signals. After processing and analysis, these signals can be used to evaluate the health of the transmission line and detect potential faults or damage in a timely manner.

[0051] The three-dimensional displacement sensors are installed on the eight sub-conductors of the eight-split transmission line. After installation, each three-dimensional displacement sensor is regulated and its origin coordinates are set to the position of its corresponding sub-conductor in a static state. This step is the key to ensure the accuracy of subsequent displacement monitoring data.

[0052] When the sub-conductor moves (such as swaying due to wind, thermal expansion and contraction due to temperature changes, etc.), the three-dimensional displacement sensor can detect and record the movement data in real time.

[0053] The detected data is a data point in a two-dimensional coordinate system determined by the left-right and up-down directions based on the set origin coordinates. Although the sensor itself is three-dimensional, in this application scenario, the main focus is on the displacement changes of the sub-conductor in the horizontal plane (left-right direction) and vertical plane (up-down direction).

[0054] By analyzing these data points, we can understand key information such as the movement trajectory and displacement amplitude of the sub-conductors, and then evaluate the stability and safety of the transmission lines.

[0055] S2: Build a remote intelligent platform, connect the three-dimensional displacement sensor and vibration sensor to the platform, set the amplitude galloping ratio R, establish a model based on the relevant parameters of the tension insulator string and the eight-split transmission line, and obtain the overall galloping threshold and the single-unit galloping threshold; when setting the amplitude galloping ratio R, the relevant expression is as follows:

[0056]

[0057] In the formula, A minIndicates the minimum amplitude value when the line is dancing. Indicates the normal wind speed in the area, L indicates the length of the sub-conductor, F average It represents the average tension of the line during normal operation. k1, k2, and k3 are weighting coefficients. ∈ represents the amplitude factor fine-tuning factor set based on experience. The sum of k1, k2, and k3 is 1. The smaller the value of ∈, the smaller R.

[0058] In calculating the monomer dancing threshold T dance , overall dancing threshold T total When , the relevant expressions are as follows:

[0059]

[0060] T total =k5×F item +k6×n×T dance ,

[0061] In the formula, x max Indicates, y max Indicates that T strength represents the tensile strength of the sub-conductor, m represents the weight of a single sub-conductor of an eight-split transmission line, L represents the average length of the sub-conductor of an eight-split transmission line, T dance represents the monomer dancing threshold, F item It represents the tensile strength of the tension insulator string. k1, k2, k3, k4, k5 and k6 are the set weighting coefficients. Among them, the total of k1, k2, k3 and k4 is 1; the total of k5 and k6 is 1.

[0062] When building a remote intelligent platform and connecting 3D displacement sensors and vibration sensors to the platform to monitor and analyze the galloping of tension insulator strings and eight-split transmission lines, setting the amplitude galloping ratio R and its related parameter models is a complex but crucial process. The following is a detailed explanation of this process and an explanation of the working mechanism:

[0063] The amplitude galloping ratio R is an important parameter used to describe the line galloping characteristics. It takes into account a variety of factors, including the lowest amplitude value when the line gallops, the normal wind speed in the area, the length of the sub-conductor, and the average tension of the line during normal operation. The specific expression may involve multiple weighting coefficients and amplitude factor fine-tuning factors set based on experience. These parameters jointly determine the value of R, thereby reflecting the sensitivity and possibility of line galloping.

[0064] Single-body dancing threshold: The single-body dancing threshold refers to the minimum amplitude of a single sub-conductor dancing under specific conditions. Its calculation takes into account factors such as the tensile strength, weight, average length of the sub-conductor and the tensile strength of the tension insulator string. By comprehensively considering these factors, the stress and stability of a single sub-conductor during the dancing process can be evaluated.

[0065] Overall galloping threshold: The overall galloping threshold refers to the minimum amplitude of the entire eight-split transmission line under specific conditions. Its calculation is more complicated because it is necessary to consider the interaction between all sub-conductors and the structural characteristics of the entire line. By calculating the overall galloping threshold, the overall stability and safety of the entire line during the galloping process can be evaluated.

[0066] Data acquisition: 3D displacement sensors and vibration sensors collect real-time displacement and vibration data of the tension insulator strings and eight-split transmission lines. These data are the basis for subsequent analysis and calculation.

[0067] Data processing: The collected data is processed and analyzed by the remote intelligent platform. The platform uses advanced algorithms and models to process the data to extract useful information and evaluate the dancing of the line.

[0068] Threshold calculation: Based on the set amplitude dancing ratio R and related expressions, the platform calculates the single dancing threshold and the overall dancing threshold. These thresholds are used to evaluate the dancing risk and stability of the line under specific conditions.

[0069] Warning and decision-making: When the monitored amplitude exceeds the set threshold, the platform will issue a warning signal and provide corresponding decision-making suggestions. These suggestions can help operation and maintenance personnel take timely measures to prevent line vibration accidents or mitigate their impact.

[0070] By setting the amplitude dancing ratio R, calculating the single-unit dancing threshold and the overall dancing threshold, and deeply understanding the working mechanism, the dancing risk and stability of the line can be evaluated more accurately, providing strong decision-making support for operation and maintenance personnel.

[0071] S3: When the amplitude detected by the vibration sensor exceeds the set amplitude dancing ratio R, it is determined that dancing may occur. The remote intelligent platform will periodically record according to the set time interval and continuously record the movement data of each sub-conductor. The relevant expression of the time interval is as follows:

[0072]

[0073] Where A represents the vibration amplitude detected by the vibration sensor, f represents the sampling frequency of the vibration sensor, m represents the weight of a single sub-conductor of the eight-split transmission line, L represents the average length of the sub-conductor of the eight-split transmission line, and w1 represents the interval control factor set according to experience; wherein w1 is greater than 0 and less than 1; the smaller the value of w1, the smaller the value of T.

[0074] Vibration detection and judgment: The vibration sensor detects the vibration of the line in real time and compares the detected vibration amplitude value with the set amplitude dancing ratio R. If the vibration amplitude value exceeds R, it is judged that dancing may occur.

[0075] Time interval calculation: According to the expression of time interval T and related parameters, calculate the time interval at which data should be recorded. This time interval is dynamically adjusted and changes according to factors such as vibration amplitude, sampling frequency, sub-conductor weight and length, and interval control factor.

[0076] Periodic recording: The remote intelligent platform periodically records the motion data of each sub-conductor according to the calculated time interval T. These data include but are not limited to key information such as displacement, speed, acceleration, etc., which are used for subsequent analysis and processing.

[0077] Data analysis and early warning: The recorded data will be transmitted to the remote intelligent platform for analysis and processing. By comparing historical data with current data, the line's dancing situation and trend can be evaluated. If an abnormal situation is detected or the risk of dancing increases, the platform will promptly issue an early warning signal to remind the operation and maintenance personnel to take appropriate measures.

[0078] S4: The remote intelligent platform determines whether the sub-conductors of the eight-split transmission line touch each other based on the recorded motion data. When it is determined that the sub-conductors of the eight-split transmission line touch each other, the remote intelligent platform will notify the staff. When determining whether the sub-conductors of the eight-split transmission line touch each other, the specific steps are as follows:

[0079] S41: numbering each sub-conductor of the eight-split transmission line from left to right in sequence, and establishing associations with movement data of each sub-conductor;

[0080] S42: extracting the coordinate information of each sub-conductor except the eighth sub-conductor and the coordinate information of the first line adjacent to the right thereof;

[0081] S43: according to the data extracted in S42, respectively calculating the two-line position relationship measurement value of the coordinate information of the first sub-conductor adjacent to the right side of each sub-conductor except the eighth sub-conductor;

[0082] S44: Combine the leader position relationship measurement values ​​of each line calculated in S43 into a set, and compare the values ​​in the set with the set touch threshold d min Compare, when there is a greater than or equal d in the set min When the value is greater than , it is considered that there is contact between the eight-split transmission lines.

[0083] When calculating the leader position relationship measurement value d between a sub-conductor and the first sub-conductor adjacent to its right side, the specific expression is as follows:

[0084] d=(x1-x2)×|y1-y2|,

[0085] In the formula, x1 represents the left-right coordinate value of the motion data of the sub-conductor to be calculated, y1 represents the up-down coordinate value of the motion data of the sub-conductor to be calculated, x2 represents the left-right coordinate value of the motion data of the first line adjacent to the right side of the sub-conductor to be calculated, and y2 represents the up-down coordinate value of the motion data of the first line adjacent to the right side of the sub-conductor to be calculated.

[0086] The touch determination value E, the relevant expression numbers are as follows:

[0087] d min =(n-r1)×(m-r2),

[0088] Wherein, n represents the distance between the sub-conductor to be calculated and the first sub-conductor adjacent to its right side in the left-right direction, m represents the distance between the sub-conductor to be calculated and the first sub-conductor adjacent to its right side in the up-down direction, r1 represents the radius of the sub-conductor to be calculated, and r2 represents the radius of the first sub-conductor adjacent to the right side of the sub-conductor to be calculated.

[0089] Data collection and association: The remote intelligent platform collects the movement data of each sub-conductor of the eight-split transmission line in real time and establishes an association with the sub-conductor number.

[0090] Coordinate information extraction and calculation: extract the coordinate information of each sub-conductor and the first sub-conductor adjacent to its right, and calculate the positional relationship measurement value between them.

[0091] Contact judgment: The calculated position relationship measurement value is compared with the set contact threshold to determine whether there is contact between the eight-split transmission lines.

[0092] Early warning and notification: When a collision is detected, the remote intelligent platform will promptly notify the staff so that appropriate measures can be taken to deal with it.

[0093] S5: The remote intelligent platform estimates the detected motion data and calculates the overall dance value and the individual dance value of each line. The overall dance value is calculated based on the individual dance value of each line, and the overall dance value is compared with the overall dance threshold, and the individual dance is compared with the individual dance threshold. When the overall dance value exceeds the overall dance threshold or the individual dance value exceeds the individual dance threshold, the remote intelligent platform will notify the staff. When calculating the individual dance value, the relevant expression is as follows:

[0094]

[0095] In the formula, x max Indicates the maximum coordinate value of the left and right direction of the sub-conductor within 5 seconds, x min Indicates the minimum coordinate value of the left and right direction of the sub-conductor within 5 seconds, y max Indicates the maximum coordinate value of the sub-conductor in the up and down direction within 5 seconds, y min It represents the minimum coordinate value of the sub-conductor in the up and down direction within 5 seconds, m represents the weight of a single sub-conductor of the eight-split transmission line, L represents the average length of the sub-conductor of the eight-split transmission line, k1 and k2 are weighting coefficients, where the total of k1 and k2 is 1.

[0096] When calculating the overall dance value, the relevant expression is as follows:

[0097]

[0098] Where D i represents the dancing value of the i-th line in the set D = {D1, D2, D3, D4, D5, D6, D7, D8}, A max It represents the maximum vibration amplitude value that occurs in 5 seconds, k1 and k2 are the set weighting coefficients; among them, the value range of k1 is 0.7-0.9, the value range of k2 is 0.1-0.3, and the sum of k1 and k2 is 1; the set D is the single-body dancing value of each of the eight sub-conductors of the eight-split transmission line.

[0099] Data collection and processing: The remote intelligent platform collects the movement data of each sub-conductor of the eight-split transmission line in real time, and processes and analyzes it.

[0100] Calculation of single dancing value: Calculate the single dancing value of each sub-conductor based on the maximum and minimum coordinate values ​​of the sub-conductor in the left-right direction and the up-down direction, as well as the weight and average length of the sub-conductor.

[0101] Calculation of overall galloping value: Calculate the overall galloping value of the entire eight-split transmission line based on the individual galloping value of each sub-conductor and the set weighting coefficient.

[0102] Dancing judgment and early warning: Compare the calculated overall dancing value and individual dancing value with the set threshold to determine whether dancing occurs and notify the staff in time.

Claims

1. A method for detecting galloping of an eight-split transmission line considering a tension insulator string, characterized in that: The following steps are involved: S1: Install vibration sensors on the tension insulator string, and install three-dimensional displacement sensors on the eight sub-conductors of the eight-split transmission line respectively, control each three-dimensional displacement sensor, and set the origin coordinates of each three-dimensional displacement sensor to the position of the corresponding sub-conductor in a static state; S2: Build a remote intelligent platform, connect the three-dimensional displacement sensor and vibration sensor to the platform, set the amplitude galloping ratio R, establish a model based on the relevant parameters of the tension insulator string and the eight-split transmission line, and obtain the overall galloping threshold and the single-unit galloping threshold; S3: When the amplitude detected by the vibration sensor exceeds the set amplitude dancing ratio R, it is determined that dancing may occur, and the remote intelligent platform will periodically record at the set time interval and continuously record the movement data of each sub-conductor; S4: The remote intelligent platform determines whether the sub-conductors of the eight-split transmission line touch each other based on the recorded motion data. When it is determined that the sub-conductors of the eight-split transmission line touch each other, the remote intelligent platform will notify the staff; S5: The remote intelligent platform estimates the detected motion data, calculates the overall dance value and the individual dance value of each line, and calculates the overall dance value based on the individual dance value of each line. The overall dance value is compared with the overall dance threshold, and the individual dance is compared with the individual dance threshold. When the overall dance value exceeds the overall dance threshold or the individual dance value exceeds the individual dance threshold, the remote intelligent platform will notify the staff.

2. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that: In the above S2, when setting the amplitude dancing ratio R, the relevant expression is as follows: In the formula, A min Indicates the minimum amplitude value when the line is dancing. Indicates the normal wind speed in the area, L indicates the length of the sub-conductor, F average It represents the average tension of the line during normal operation. k1, k2, and k3 are weighting coefficients. ∈ represents the amplitude factor fine-tuning factor set based on experience. The sum of k1, k2, and k3 is 1. The smaller the value of ∈, the smaller R.

3. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that: In the above S2, when calculating the monomer dancing threshold T dance , overall dancing threshold T total When , the relevant expressions are as follows: T total =k5×F item +k6×n×T dance , In the formula, x max Indicates, y max Indicates that T strength represents the tensile strength of the sub-conductor, m represents the weight of a single sub-conductor of an eight-split transmission line, L represents the average length of the sub-conductor of an eight-split transmission line, T dance represents the monomer dancing threshold, F item It represents the tensile strength of the tension insulator string. k1, k2, k3, k4, k5 and k6 are the set weighting coefficients. Among them, the total of k1, k2, k3 and k4 is 1; the total of k5 and k6 is 1.

4. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that: In the above S1, when each three-dimensional displacement sensor is regulated, the origin coordinates of each three-dimensional displacement sensor are set to the position of the corresponding sub-conductor in a static state; when each three-dimensional displacement sensor detects the corresponding sub-conductor motion data, what is detected is the data point in the two-dimensional coordinates determined in the left-right direction and the up-down direction based on the origin coordinates.

5. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that: In S3, the relevant expression of the time interval is as follows: Where A represents the vibration amplitude detected by the vibration sensor, f represents the sampling frequency of the vibration sensor, m represents the weight of a single sub-conductor of the eight-split transmission line, L represents the average length of the sub-conductor of the eight-split transmission line, and w1 represents the interval control factor set according to experience; wherein w1 is greater than 0 and less than 1; the smaller the value of w1, the smaller the value of T.

6. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that: In the above S4, when judging whether the eight split transmission lines touch each other, the specific steps are as follows: S41: numbering each sub-conductor of the eight-split transmission line from left to right in sequence, and establishing associations with movement data of each sub-conductor; S42: extracting the coordinate information of each sub-conductor except the eighth sub-conductor and the coordinate information of the first line adjacent to the right thereof; S43: according to the data extracted in S42, respectively calculating the two-line position relationship measurement value of the coordinate information of the first sub-conductor adjacent to the right side of each sub-conductor except the eighth sub-conductor; S44: Combine the leader position relationship measurement values ​​of each line calculated in S43 into a set, and compare the values ​​in the set with the set touch threshold d min Compare, when there is a greater than or equal d in the set min When the value is greater than , it is considered that there is contact between the eight-split transmission lines.

7. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 5, characterized in that: In the above S42, when calculating the leader position relationship measurement value d between the sub-conductor and the first sub-conductor adjacent to its right side, the specific expression is as follows: d=(x1-x2)×|y1-y2|, In the formula, x1 represents the left-right coordinate value of the motion data of the sub-conductor to be calculated, y1 represents the up-down coordinate value of the motion data of the sub-conductor to be calculated, x2 represents the left-right coordinate value of the motion data of the first sub-conductor adjacent to the right side of the sub-conductor to be calculated, and y2 represents the up-down coordinate value of the motion data of the first line adjacent to the right side of the sub-conductor to be calculated.

8. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 5, characterized in that: In the above S44, the touch determination value E is touched, and the related expression numbers are as follows: d min =(n-r1)×(m-r2); Wherein, n represents the distance between the sub-conductor to be calculated and the first sub-conductor adjacent to its right side in the left-right direction, m represents the distance between the sub-conductor to be calculated and the first sub-conductor adjacent to its right side in the up-down direction, r1 represents the radius of the sub-conductor to be calculated, and r2 represents the radius of the first sub-conductor adjacent to the right side of the sub-conductor to be calculated.

9. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that: In the above S5, when calculating the monomer dancing value, the relevant expression is as follows: In the formula, x max Indicates the maximum coordinate value of the left and right direction of the sub-conductor within 5 seconds, x min Indicates the minimum coordinate value of the left and right direction of the sub-conductor within 5 seconds, y max Indicates the maximum coordinate value of the sub-conductor in the up and down direction within 5 seconds, y min It represents the minimum coordinate value of the sub-conductor in the up and down direction within 5 seconds, m represents the weight of a single sub-conductor of the eight-split transmission line, L represents the average length of the sub-conductor of the eight-split transmission line, k1 and k2 are weighting coefficients, where the total of k1 and k2 is 1.

10. The method for detecting galloping of an eight-split transmission line considering a tension insulator string according to claim 1, characterized in that: In the above S5, when calculating the overall dancing value, the relevant expression is as follows: Where D i represents the dancing value of the i-th line in the set D = {D1, D2, D3, D4, D5, D6, D7, D8}, A max It represents the maximum vibration amplitude value that occurs in 5 seconds, k1 and k2 are the set weighting coefficients; among them, the value range of k1 is 0.7-0.9, the value range of k2 is 0.1-0.3, and the sum of k1 and k2 is 1; the set D is the single-body dancing value of each of the eight sub-conductors of the eight-split transmission line.

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