Windproof and vibration-proof wire icing weight automatic monitoring device and monitoring method
By using an electric push rod and a wind baffle in the wire ice weight monitoring device, the raising, lowering and rotating of the wind baffle are controlled according to the wind direction and wind speed, which solves the problem of inaccurate measurement under the influence of wind vibration and achieves higher precision ice weight monitoring.
Patent Information
- Application Number
- CN202511058966.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-30
- Publication Date
- 2025-12-16
AI Technical Summary
Automatic monitoring of the weight of ice buildup on power lines is greatly affected by environmental wind and vibration, resulting in low measurement accuracy and affecting the safe operation of the power grid.
A wind-resistant vibration prevention unit, including an electric push rod and a wind baffle, is adopted. By identifying the ambient wind direction and speed, the raising, lowering and rotating of the wind baffle are controlled to form a calm wind zone and suppress the interference of wind vibration on the measurement of ice accumulation weight.
It improves the accuracy and reliability of monitoring the weight of ice buildup on power lines, reduces power consumption, adapts to wind protection needs in different wind directions, and provides more reliable data support.
Smart Images
Figure CN121140918A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of data observation technology, and in particular to an automatic monitoring device and method for monitoring the weight of ice buildup on power lines to prevent wind vibration. Background Technology
[0002] In meteorological monitoring and power systems, icing on power lines is a significant factor affecting the safe operation of transmission lines. Prolonged rain, snow, and freezing weather can lead to severe icing on conductors and towers, generating gravity overloads and triggering a series of ice-related accidents, including tower collapses, line breaks, ice flashover trips, conductor galloping, and equipment damage. These disasters not only severely impact the normal operation of the power system but can also cause widespread power outages, seriously affecting the socio-economic landscape. Therefore, accurately monitoring the weight of icing on power lines is of great significance for preventing and controlling ice disasters and improving the reliability of power grid operation.
[0003] Automatic monitoring of power line icing weight is significantly affected by vibrations caused by ambient wind. Eliminating the influence of wind vibration is a key technical challenge in this process. The mechanical measurement of power line icing weight simulates the forces acting on the conductor. However, due to the harsh freezing weather environment where the simulated conductor is located, icing and ambient wind coexist. The irregular shape of the icing alters the aerodynamic characteristics of the conductor, causing vibrations. These vibrations lead to drastic fluctuations in the force signals collected by the mechanical sensors, as the sensors cannot effectively distinguish between static icing gravity and dynamic vibration inertial forces. Especially in the middle and later stages of icing growth, asymmetrical icing on the conductor cross-section generates aerodynamic torque, further exacerbating coupled vibrations in three-dimensional space and increasing measurement errors. This measurement inaccuracy severely impacts the reliability of real-time monitoring of power line icing weight, potentially leading to false alarms for heavy icing or delays in emergency response to dangerous icing conditions. Therefore, it is necessary to develop a monitoring device that can eliminate the influence of vibrations caused by ambient wind during automatic monitoring of power line icing weight, improving the accuracy and precision of icing weight monitoring and providing more reliable data support for power grid icing prevention and disaster mitigation decisions. Summary of the Invention
[0004] In order to overcome the shortcomings of the existing technology in measuring the low accuracy of conductor ice accumulation caused by wind vibration, the present invention provides an automatic monitoring device and method for monitoring the weight of conductor ice accumulation that is resistant to wind vibration, which can solve the problem of low accuracy in measuring conductor ice accumulation caused by wind vibration.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides an automatic monitoring device for the weight of icing on power cables to prevent wind vibration, comprising a control unit, a weight detection unit, a wind vibration prevention unit, and a meteorological detection unit. The power cable to be tested is installed in the weight detection unit, and the wind vibration prevention unit, weight detection unit, and meteorological detection unit are respectively communicatively connected to the control unit. The wind vibration prevention unit includes several electric push rods, several wind baffles, and a fixed connection part. The two sides of the wind baffles are installed on the top of the electric push rods through the fixed connection parts. When the electric push rod is in a first state, the height of the top of the wind baffle is less than the height of the weight detection unit. When the electric push rod is in a second state, the projection of the power cable toward the wind baffle coincides with the projection of the wind baffle.
[0006] Using the above technical solution, the meteorological monitoring unit identifies the ambient temperature and whether there is rainfall. The meteorological detection unit transmits the collected data to the control unit. When the time for detecting the weight of the icing on the conductor approaches, the control unit controls the anti-wind vibration unit to start working. The electric push rod drives the wind baffle to rise. Subsequently, the control unit controls the weight detection unit to collect the weight data of the conductor and transmit it to the control unit. The control unit controls the electric push rod of the anti-wind vibration unit to retract and lower the wind baffle. In this application, when the weight detection unit is working, the anti-wind vibration unit is controlled to work in advance, so that the wind baffle rises to form a calm wind zone, suppressing the interference of wind vibration on the measurement of the weight of the icing on the conductor, avoiding inaccurate weight detection results. After the weight detection is completed, the wind baffle is retracted. Under the premise of minimizing the interference with the natural formation process of icing on the conductor, the accuracy of automatic measurement of the weight of the icing on the conductor is improved by suppressing the wind-induced vibration of the monitoring equipment.
[0007] Furthermore, the wind-resistant vibration unit is positioned in the first direction of the weight detection unit, and there is a preset angle between the wind-resistant plates.
[0008] By adopting the above technical solution, since the main cause of rime and frost in reality is northerly winds, including due northerly, northwesterly, and northeasterly winds, the prevailing wind in rime and frost environments is northerly, with the primary direction being north. The windbreaks have preset angles, allowing the middle windbreak to be positioned to the north, while the side windbreaks are tilted at a preset angle to the middle windbreak, either northeasterly or northwesterly. This effectively blocks most of the wind interference, ensuring more accurate data collection and expanding the wind-blocking range.
[0009] Furthermore, the automatic monitoring device for the weight of icing on power lines is also equipped with a wind direction and speed sensor and a rotation unit. The wind direction and speed sensor and the rotation unit are respectively connected to the control unit. The control unit controls the rotation unit to rotate according to the wind direction data collected by the wind direction and speed sensor. The rotation unit includes a drive motor and a turntable. The drive motor drives the turntable to rotate. The anti-wind vibration unit and / or weight monitoring unit are installed on the turntable.
[0010] Using the above technical solution, although most winds are from the north, there are also winds from the east, west, and south. Before controlling the anti-vibration unit, the wind direction and speed sensors can be activated to collect the current wind direction and speed information. If there is no wind in the current environment, the control unit will not control the anti-vibration unit, effectively reducing the power required during device operation. When the wind speed is greater than 0 and the wind direction is not the primary direction, the control unit drives the rotating unit to rotate. When the wind direction is detected to be other than north, northwest, or northeast, the rotating unit operates. The rotating unit can be installed at the bottom of the weight detection unit, the bottom of the anti-vibration unit, or both.
[0011] Furthermore, when the turntable is installed at the bottom of the weight detection unit and the wind-resistant vibration unit is fixedly set and in the second state, and the wind direction and speed sensor detects a second wind direction different from the first direction, the control unit controls the drive motor to drive the turntable to rotate so that the direction of the wire is parallel to the second wind direction.
[0012] By adopting the above technical solution, a rotating unit is set at the bottom of the weight detection unit, the turntable is placed on top of the drive motor, and the weight detection unit is placed on top of the turntable. When the wind direction and wind speed sensor detects a second wind direction that is different from the first direction, the drive motor drives the turntable to rotate, and the turntable drives the weight detection unit to rotate to a direction parallel to the second wind direction. This avoids the inaccurate weighing caused by the wind blowing directly on the wire and can better adapt to the wind protection requirements of different wind directions.
[0013] Furthermore, the turntable is installed at the bottom of the wind-resistant vibration unit, and the rotating unit is also equipped with a track. The drive motor drives the turntable to rotate around the track, which is arranged circumferentially around the weight detection unit. The rotating unit drives the wind-resistant vibration unit to rotate to the windward side of the weight detection unit.
[0014] Using the above technical solution, the turntable is installed at the bottom of the wind-resistant vibration unit. In this case, the rotating unit includes a drive motor, a turntable, and a track. The wind-resistant vibration unit is installed on top of the turntable, and the track is located at the bottom of the turntable. The track is preferably a circular track, arranged circumferentially around the weight detection unit. The turntable drives the wind-resistant vibration unit to rotate circumferentially around the weight detection unit, thus rotating the wind deflector to the windward side of the weight detection unit, better adapting to wind-blocking requirements from different directions. This solution only adds a rotating mechanism to the wind-resistant vibration unit, meeting the need to block wind from different directions, while not adding a rotating mechanism at the bottom of the weight detection mechanism, ensuring the stability of the weight detection mechanism. The weight detection mechanism will not wobble due to improper rotation, resulting in inaccurate weight detection.
[0015] Furthermore, the weight detection unit includes a support rod, a wire, a load cell, and a protective shell. There are two support rods, and a load cell is fixed on the top of each support rod. The wire is installed above the load cell.
[0016] The above technical solution uses two metal support rods, each 1.4 mm high, with a square cross-section and a side length of 5 cm. Two load cells are used to measure the weight of the ice accumulation on the simulated wire. One simulated wire, 1 m long, is fixed at both ends to the load cells. The load cells are enclosed in a protective shell, 30 cm high, with a square cross-section and a side length of 20 cm. The protective shell has a through-hole through which the wire passes and connects to the built-in load cells. The load cells on both sides measure the weight of the wire. This weight includes both the weight of the wire and the weight of the accumulated ice. Since the weight of the wire is known, subtracting the weight of the wire from the weight measured by the load cells gives the weight of the accumulated ice. This weighing method has a simple structure, reducing the complexity and cost of the mechanism.
[0017] Furthermore, the meteorological monitoring unit includes precipitation weather phenomenon instruments and temperature sensors.
[0018] Using the above technical solution, the meteorological monitoring unit includes a precipitation weather phenomenon instrument and a temperature sensor. The precipitation weather phenomenon instrument is used to identify precipitation types, such as liquid rain, solid snowfall, hail, etc.; the temperature sensor is used to monitor the ambient temperature. The combination of the two can better monitor freezing rain weather.
[0019] The present invention also provides an automatic method for detecting the weight of ice buildup on power lines, using the wind-resistant automatic monitoring device for the weight of ice buildup on power lines as described above, comprising the following steps: S1. The meteorological monitoring unit detects whether the ambient temperature is below zero and transmits the detected ambient temperature data to the control unit. If not, the windproof vibration unit stops working, and the weight detection unit works once every first preset time. If yes, proceed to step S2. S2. Detect whether the weather is rainy and transmit the detected weather information to the control unit. If the weather is rainy, the anti-wind vibration unit will work once every second preset time, and the weight detection unit will collect information once every second preset time. If the weather is not rainy, the anti-wind vibration unit will work once every first preset time, and the weight detection unit will collect information once every first preset time. The duration of the first preset time is longer than the duration of the second preset time.
[0020] Using the above technical solution, if the temperature is <0℃ and rainfall is detected within the second preset time, it is determined to be freezing rain. The electric actuator is then controlled to raise the windbreak, creating a calm wind zone for 1 minute before resetting. If the temperature is <0℃ but there is no rainfall within the second preset time, the windbreak does not rise, and the weight of the ice accumulation on the power lines is recorded based on data from the previous second preset time. If the first preset time meets the condition of no freezing rain, the windbreak is forcibly raised for a measurement to ensure data continuity. If the temperature is >0℃, the electric actuator does not operate. This method employs an intermittent measurement approach, with the sampling frequency set to different preset times depending on environmental conditions to reduce power consumption and adapt to outdoor environments. Furthermore, this method controls the windbreak to rise only under freezing rain conditions to minimize interference with the formation of rime ice.
[0021] Furthermore, before the anti-wind vibration unit operates, a wind direction and speed sensor is used to detect whether the ambient wind speed is greater than 0; if it is greater than 0, the control unit controls the anti-wind vibration unit to rise; if the wind speed is equal to 0, the anti-wind vibration unit does not operate.
[0022] Using the above technical solution, sub-zero temperatures or environments with rainfall do not necessarily have wind. Activating the anti-wind vibration unit requires a significant amount of power. Therefore, before activating the anti-wind vibration unit, a wind direction and speed sensor can be used to detect whether the ambient wind speed is greater than 0. If it is greater than 0, the anti-wind vibration unit is activated; if it is equal to 0, it is not activated. At the same time, the weight detection unit can complete the detection quickly, avoiding inaccurate detection due to sudden ambient winds, while also saving power.
[0023] Furthermore, the wind direction and speed sensor detects the wind direction and transmits the data to the control unit. The control unit then controls the rotating unit to drive the anti-wind vibration unit to rotate, thereby blocking wind from different directions.
[0024] Using the above technical solution, if the wind direction and speed sensor detects a wind speed greater than 0, the control unit simultaneously determines the wind direction and controls the rotating unit to rotate the windproof vibration unit to the direction that can block the wind, which can better adapt to the windproof requirements of different wind directions. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the automatic monitoring device for the weight of ice buildup on power lines to prevent wind vibration, as described in this invention. Figure 2 This is a schematic diagram of the structure of the weight detection unit of the present invention located at the top of the rotating unit; Figure 3 A top view of the weight detection unit located at the top of the rotating unit; Figure 4 This is a top view of the initial state of the wind-resistant vibration prevention unit of the present invention located at the top of the rotating unit; Figure 5This is a top view of the wind-resistant vibration prevention unit of the present invention after it has been rotated a certain angle and is located on top of the rotating unit. Figure 6 This is a flowchart of the automatic detection method for the weight of ice buildup on electrical wires according to the present invention.
[0026] In the diagram: 10. Control unit; 20. Weight detection unit; 21. Support rod; 22. Wire; 23. Weighing sensor; 30. Wind-resistant vibration unit; 31. Electric push rod; 32. Wind baffle; 33. Fixed connection part; 40. Meteorological detection unit; 41. Precipitation weather phenomenon instrument; 42. Temperature sensor; 50. Rotation unit; 51. Turntable; 52. Track; 53. Drive motor; 54. Metal protective cover; 60. Wind direction and speed sensor. Detailed Implementation
[0027] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.
[0028] Currently, various methods are used in power grid operation for monitoring power line icing, including manual line inspection, simulating conductor icing at observation stations, and online monitoring devices. Among these, the online monitoring device for equivalent power line icing based on the tension-weighing method is widely used due to its high precision and reliability. This device measures the mass of the conductor within a vertical span using tension sensors and calculates the wind resistance coefficient and the insulator string tilt component by combining data from wind speed, wind direction, and tilt sensors, ultimately determining the weight of the accumulated ice on the power line. In addition, indirect measurement methods such as image processing and numerical simulation are also used, offering advantages in terms of ease of installation and safety. Fiber optic sensing technology has also been introduced into power line icing monitoring; for example, fiber Bragg grating sensors are used to monitor changes in transmission line load caused by power line icing, further improving monitoring accuracy.
[0029] Meteorological departments often use simulated wire ice accumulation monitoring to monitor the weight of icing on power lines, which can be divided into direct manual measurement and mechanical measurement methods.
[0030] The manual direct measurement method is mainly based on the "Ground Meteorological Observation Specification - Power Line Icing" (GB / T 35235—2017). A 1m long, 26.8mm diameter conductor is used as a simulated conductor. In outdoor environments, this can be used between several transmission towers or at a dedicated meteorological ice measurement center. The conductor can be placed in either an east-west or north-south direction. When the weight of the ice accumulated on the simulated conductor reaches its maximum, a 25cm section of ice is manually removed from the conductor. The weight of the ice is then measured using a platform scale or measuring cup and converted to the weight of the ice accumulated on the 1m long simulated conductor. The mechanical measurement method uses the same setup and conductor configuration as the manual direct measurement method. It primarily involves installing load cells at both ends of the simulated conductor to directly measure the force acting on the conductor, which is equivalent to the weight of the ice accumulated on the conductor, and then converting this to the weight of the ice accumulated on the conductor. The mechanical measurement method obtains the weight data of the ice accumulated on the conductor in real time with a high sampling frequency. Compared with mechanical measurement methods, manual direct measurement methods can only measure the extreme values of ice accumulation on wires and cannot obtain the weight of ice accumulation on wires at regular intervals. Therefore, mechanical measurement methods are mainly used for timed monitoring of ice accumulation on wires.
[0031] However, in actual observation, the timed monitoring of power line ice weight is significantly affected by vibrations caused by ambient wind. Eliminating the influence of wind vibration is a key technical issue in the automatic monitoring of power line ice weight. The mechanical measurement object of power line ice weight is to simulate the force on the conductor. However, due to the harsh freezing weather environment in which the simulated conductor is located, ice and ambient wind coexist. The irregular shape of the ice changes the aerodynamic characteristics of the conductor, causing vibration in the simulated conductor. Ice accumulation is mainly caused by freezing rain, with ambient wind speeds mostly below 10 m / s and relatively stable. When there is an angle between the wind direction and the conductor's orientation, vortices are generated on the back of the conductor, causing vertical vibration. These vibrations cause drastic fluctuations in the force signals collected by the mechanical sensors because the sensors cannot effectively distinguish between static ice gravity and dynamic vibration inertial force. Especially in the middle and late stages of ice accumulation, asymmetrical ice accumulation on the conductor cross-section will generate aerodynamic torque, further aggravating the coupled vibration in three-dimensional space, further increasing the measurement error. This measurement inaccuracy seriously affects the reliability of real-time monitoring of power line ice weight, which may lead to false alarms for heavy ice accumulation or delay the emergency response to dangerous ice accumulation. Therefore, it is necessary to develop a monitoring device that can eliminate the vibration caused by environmental wind during the timed monitoring of the weight of ice accumulation on power lines, improve the accuracy of the monitoring of the weight of ice accumulation on power lines, and provide more reliable data support for scientific research on ice accumulation and decision-making on power grid ice prevention and disaster reduction.
[0032] Example 1: This invention provides an automatic monitoring device for the weight of ice buildup on power lines to prevent wind vibration, such as... Figure 1As shown, the system includes a control unit 10, a wind-resistant vibration unit 30, a weight detection unit 20, and a meteorological monitoring unit 40. The wire 22 to be tested is installed in the weight detection unit 20. The wind-resistant vibration unit 30, the weight detection unit 20, and the meteorological monitoring unit 40 are respectively connected to the control unit 10. The wind-resistant vibration unit 30 includes an electric push rod 31, a wind baffle 32, and a fixed connection part 33. The wind baffle 32 is installed on the top of the electric push rod 31 through the fixed connection part 33. When the electric push rod 31 is in the first state, the height of the top of the wind baffle 32 is less than the height of the weight detection unit 20. When the electric push rod 31 is in the second state, the projection of the wire 22 toward the wind baffle 32 coincides with the projection of the wind baffle 32.
[0033] Since there are two main types of icing on power lines: rime and hoarfrost, hoarfrost mainly occurs when the relative humidity exceeds 80% and the temperature is below 0°C, creating supercooled fog in the air. Driven by wind, this fog is blown onto the conductor 22, causing it to freeze. Hoarfrost grows rapidly in volume but slowly in weight. Rime, on the other hand, mainly occurs when rainwater falls vertically onto the conductor 22 and freezes. Hoarfrost and wind are closely linked. By using the wind deflector 32 to block the wind and eliminate its vibration effects, the amount of supercooled fog in contact with the conductor 22 inevitably decreases. Therefore, the wind deflector 32 cannot block the wire for extended periods. Furthermore, since the main contributor to the growth of icing on power lines is rime, and the rate of freezing rain forming rime is relatively small, while the mass increase caused by hoarfrost is even smaller, the weight monitoring of icing on power lines does not require measurement every minute. A sampling frequency with preset intervals can be used. Therefore, the wind deflector 32 can be raised before data collection, which will not affect the accumulation of hoarfrost and will also avoid inaccurate test results caused by wind interference.
[0034] The preset time is preferably 10 minutes or 20 minutes, but it is not limited here. It can be determined according to the ambient temperature. If the ambient temperature is low, the preset time can be set to a smaller value to ensure the accuracy of the test results; if the ambient temperature is high, the preset time can be set to a larger value to save power.
[0035] In practice, the meteorological monitoring unit 40 identifies the ambient temperature and whether there is rainfall in the current environment. The meteorological detection unit 40 transmits the collected data to the control unit 10. When the time for detecting the weight of ice accumulation on the conductor 22 approaches, the control unit 10 controls the windproof vibration unit 30 to start working. The electric push rod 31 drives the wind baffle 32 to rise. Subsequently, the control unit 10 controls the weight detection unit 20 to collect the weight data of the conductor 22 and transmit it to the control unit 10. The control unit 10 then controls the electric push rod 31 of the windproof vibration unit 30 to retract and lower the wind baffle 32.
[0036] Furthermore, the meteorological monitoring unit 40 includes a precipitation weather phenomenon instrument 41, a temperature sensor 42, and a weather phenomenon instrument.
[0037] In practice, the meteorological monitoring unit 40 collects temperature and weather information every minute. The meteorological monitoring unit 40 includes a precipitation weather phenomenon instrument 41 and a temperature sensor 42. The precipitation weather phenomenon instrument 41 is used to identify precipitation types, such as liquid rain, solid snowfall, hail, etc.; the temperature sensor 42 is used to monitor the ambient temperature.
[0038] Through the above technical solution, this application controls the wind-resistant vibration prevention unit 30 to operate in advance when the weight detection unit 20 is working, causing the wind baffle 32 to rise and form a calm wind zone, suppressing the interference of wind vibration on the measurement of the weight of icing on power lines, and avoiding inaccurate weight detection results. After the weight detection is completed, the wind baffle 32 is retracted. By suppressing wind-induced vibration of the monitoring equipment while minimizing interference with the natural formation process of icing on power lines, the accuracy of automatic measurement of the weight of icing on power lines is improved. At the same time, the low-power intermittent measurement method is adopted, which is suitable for long-term field monitoring and improves the early warning capability of power grid icing disasters.
[0039] Preferably, the windproof vibration unit 30 includes four electric push rods 31, three wind deflectors 32, and four fixing components. The three wind deflectors 32 are mounted on the four sets of electric push rods 31. The wind deflectors 32 are mounted on the electric push rods 31 through the fixing components. The electric push rods 31 are controlled by the control unit 10 and are electrically connected to the control unit 10. When it is necessary to raise the wind deflector 32, the control unit 10 controls the electric push rods 31 to start working. The electric push rods 31 are raised, and the height of the wind deflector 32 is higher than the height of the wire 22, thus blocking the wind.
[0040] Furthermore, the wind-resistant vibration unit 30 is positioned in the first direction of the weight detection unit 20, and there is a preset angle between the wind baffles 32.
[0041] In reality, the main cause of rime and frost is northerly winds, including due northerly, northwesterly, and northeasterly winds. Therefore, in rime and frost environments, northerly winds are dominant. Preferably, the primary direction is northerly. There is a preset angle between the windbreaks 32. The middle windbreak 32 can be set in the northerly direction, and the windbreaks 32 on both sides can be set at a certain preset angle to the middle windbreak 32, which can be set in the northeasterly and northwesterly directions. This effectively blocks most of the wind interference, ensures more accurate information collection, and expands the range of wind blocking.
[0042] It should be noted that the first direction is not limited to north; it can also be east, west, south, etc.
[0043] As mentioned above, northerly winds mainly include due northerly winds, northwesterly winds, and northeasterly winds. Therefore, if the wind deflectors 32 are arranged in a straight line, they can only block winds from one direction. Thus, a certain angle needs to be set between different wind deflectors 32. In this application, three wind deflectors 32 are preferably used. More preferably, the middle wind deflector 32 is arranged parallel to the conductor 22 and faces the conductor 22. The angle between the two side wind deflectors 32 and the middle wind deflector 32 is less than 180° to block northwesterly and northeasterly winds.
[0044] In practice, although most winds are from the north, there are also winds from the east, west, and south. According to the "Ground Meteorological Observation Specification - Power Line Icing" (GB / T 35235—2017), due to the changing ambient wind direction during freezing rain and the angle between the ambient wind and the conductor 22, and with wind speeds below 10 m / s, vibrations will occur when the angle is greater than 20°. When the angle reaches 90°, the vibration changes from unstable to stable, affecting the measurement accuracy of the weighing sensor. When the angle is less than 20°, vibrations rarely occur. According to the description of wind load in DL / T 5092—1999 "Technical Specification for Design of 110-500 kV Overhead Transmission Lines", when the angle between the ambient wind and conductor 22 approaches 0°, the wind load on conductor 22 approaches 0. The impact of wind vibration on the monitoring of power line icing weight can be reduced by decreasing the angle between the ambient wind and the simulated conductor 22. When the angle reaches 0°, the impact of wind vibration can be minimized.
[0045] Furthermore, the automatic monitoring device for the weight of ice accumulation on power lines to prevent wind vibration according to the present invention is also equipped with a wind direction and speed sensor 60 and a rotation unit 50. The wind direction and speed sensor 60 and the rotation unit 50 are respectively connected to the control unit 10. The control unit 10 controls the rotation unit 50 to rotate according to the wind direction data collected by the wind direction and speed sensor 60. The rotation unit 50 includes a drive motor 53 and a turntable 51. The drive motor 53 drives the turntable 51 to rotate. The wind vibration prevention unit and / or weight detection unit are installed on the turntable 51.
[0046] In practical implementation, the wind direction and speed sensor 60 can be controlled before controlling the wind-resistant vibration unit 30. The wind direction and speed sensor 60 collects wind direction and speed data every minute. If the wind speed in the current environment is equal to 0, the control unit 10 will not control the wind-resistant vibration unit 30 to work, effectively reducing the power required during the use of the device. When the wind speed is greater than 0 and the wind direction is not the first direction of wind, the control unit 10 drives the rotating unit 50 to rotate. When the wind direction is detected to be other than north, northwest, or northeast, the rotating unit 50 will work. The rotating unit 50 can be installed at the bottom of the weight detection unit 20, at the bottom of the wind-resistant vibration unit 30, or at the bottom of both the weight detection unit 20 and the wind-resistant vibration unit 30.
[0047] Furthermore, such asFigure 2 and Figure 3 As shown, the turntable 51 is installed at the bottom of the weight detection unit 20. When the wind-resistant vibration unit 30 is fixedly set and in the second state, when the wind direction and wind speed sensor 60 detects a second wind direction different from the first direction, the control unit 10 controls the drive motor 53 to drive the turntable 51 to rotate, thereby controlling the rotation unit 50 to drive the direction of the wire 22 to be parallel to the wind direction.
[0048] In specific implementation, a rotating unit 50 is set at the bottom of the weight detection unit 20. The rotating unit 50 includes a drive motor 53 and a turntable 51. The turntable 51 is placed on top of the drive motor 53, and the weight detection unit 20 is placed on top of the turntable 51. When the wind direction and speed sensor 60 detects a non-north-facing wind, the drive motor 53 drives the turntable 51 to rotate. The turntable 51 drives the weight detection unit 20 to rotate in a direction parallel to the wind direction, avoiding inaccurate weighing caused by the wind blowing directly on the wire 22, and better adapting to the wind protection needs of different wind directions.
[0049] Preferably, in this embodiment, a metal protective cover 54 is also provided at the bottom of the drive motor 53 to install the drive motor 53 and protect it. The turntable 51 is installed on the top of the drive motor 53. The turntable 51 is preferably a circular metal plate with a thickness of 5mm and a diameter of 1400mm. The weight detection unit 20 is fixedly connected to the rotating platform by fixing bolts.
[0050] In one embodiment, such as Figure 4 and Figure 5 As shown, the turntable 51 is installed at the bottom of the windproof vibration unit 30. The rotating unit 50 is also provided with a track 52. The drive motor 53 drives the turntable 51 to rotate around the track 52. The track 52 is arranged circumferentially around the weight detection unit 20. The rotating unit 50 drives the windproof vibration unit 30 to rotate to the windward side of the weight detection unit 20.
[0051] In specific implementation, the rotating unit 50 is installed at the bottom of the windproof vibration unit 30. The rotating unit 50 includes a drive motor 53, a turntable 51, and a track 52. The windproof vibration unit 30 is installed on top of the turntable 51, and the track 52 is located at the bottom of the turntable 51. The track 52 is preferably a circular track, circumferentially arranged around the weight detection unit 20. The turntable 51 drives the windproof vibration unit 30 to rotate circumferentially around the weight detection unit 20, rotating the windbreak plate 32 to the windward side of the weight detection unit 20, thus better adapting to wind-blocking requirements from different directions. This solution only adds a rotating mechanism to the windproof vibration unit 30, meeting the need to block wind from different directions, without adding a rotating mechanism at the bottom of the weight detection mechanism, ensuring the stability of the weight detection mechanism. The weight detection mechanism will not wobble due to improper rotation, resulting in inaccurate weight detection.
[0052] In practice, the signal acquisition unit of the control unit 10 acquires the data collected by the meteorological detection unit 40 and the wind direction and speed sensor 60 every minute to determine freezing rain. If freezing rain occurs, the angle between the wind direction and the direction of the conductor 22 is calculated, and the rotation direction and rotation angle value signals are sent. After the weight of the ice accumulated on the conductor is measured, a reset signal is sent. The signal is sent to the motor of the rotation unit 50 through the driver.
[0053] It should be noted that the acquisition of various information every minute as defined in this invention is not limited to one minute, but can also be other times, such as 10 seconds, 20 seconds, 30 seconds, 2 minutes, 3 minutes, 5 minutes, etc., and is not limited here.
[0054] In one embodiment, the electric push rod 31 can also be arranged in a circular shape around the weight detection unit 20, and a wind baffle 32 can be installed between every two electric push rods 31. That is, the windproof vibration unit 30 forms a ring-shaped windproof area that can block wind from all directions.
[0055] Furthermore, the weight detection unit 20 includes a support rod 21, a wire 22, a load cell 23, and a protective shell. There are two support rods 21, and a load cell 23 is fixed on the top of each support rod 21. The wire 22 is installed on the top of the load cell 23.
[0056] In practice, the support rod 21 consists of two metal rods, each 1.4 mm high, with a square cross-section and a side length of 5 cm. Two weighing sensor components 23 are used to measure the weight of the ice accumulation on the simulated wire 22. One simulated wire 22, 1 m long, is fixed at both ends to the weighing sensor components 23. The weighing sensor 23 is enclosed in a protective shell, 30 cm high, with a square cross-section and a side length of 20 cm. The protective shell has a through-hole through which the wire 22 passes and connects to the built-in weighing sensor 23. The weighing sensors 23 on both sides obtain the weight of the wire 22. This weight includes both the weight of the wire 22 and the weight of the accumulated ice. Since the weight of the wire 22 is known, subtracting the weight of the wire 22 from the weight obtained by the weighing sensor 23 gives the weight of the accumulated ice. This weighing method has a simple structure, reducing the complexity and cost of the mechanism.
[0057] Example 2: like Figure 6 As shown, the present invention also provides an automatic method for detecting the weight of ice buildup on power lines, using the wind-resistant automatic monitoring device for the weight of ice buildup on power lines as described above, comprising the following steps: S1. The meteorological monitoring unit 40 detects whether the ambient temperature is below zero and transmits the detected ambient temperature data to the control unit 10. If not, the windproof vibration unit 30 stops working and the weight detection unit 20 works once every first preset time. If yes, proceed to step S2. S2. Detect whether the weather is rainy and transmit the detected weather information to the control unit 10. If the weather is rainy, the anti-wind vibration unit 30 will work once every second preset time, and the weight detection unit 20 will collect information once every second preset time. If the weather is not rainy, the anti-wind vibration unit 30 will work once every first preset time, and the weight detection unit 20 will collect information once every first preset time.
[0058] Preferably, the first preset time is longer than the second preset time. More preferably, the first preset time is 20 minutes and the second preset time is 10 minutes. It should be noted that the first preset time is not limited to 20 minutes, and the second preset time is not limited to 10 minutes; both can be determined according to specific circumstances, as long as the first preset time is longer than the second preset time.
[0059] In practice, the identification of rime and hoarfrost is achieved through a precipitation weather phenomenon instrument 41 and temperature and humidity sensors. If the temperature is below 0°C within 10 minutes and there is rainfall, it is identified as freezing rain. If the wind speed is greater than 0 m / s, the electric push rod 31 is raised to create a calm wind zone near the conductor 22. The weight of the ice on the wire is measured by the weighing sensor 23. After being raised to the top for 1 minute, the electric push rod 31 is reset. This part of the control takes into account that freezing rain is the main contributor to icing on the wire. If freezing rain occurs, the increase in icing on the wire must be measured. If the temperature is below 0°C within 10 minutes and there is no rainfall, it means there is no rime. The increase in the weight of icing on the power lines due to freezing rain and rime within 10 minutes is minimal. To minimize the impact on the environment for icing growth, the wind deflector 32 does not rise under these conditions. Measurement is not required, or the weight of the icing on the power lines can be recorded directly with the record from the previous 10 minutes. If the temperature is below 0°C for 20 consecutive minutes without rainfall, to ensure the continuity of the record, the contribution of rime to the growth of icing on the power lines must be considered. In this case, the electric push rod 31 is raised and lowered to create a calm wind zone, and the weight of the icing on the power lines is recorded. If the temperature is above 0°C and there is no freezing rain or supercooling fog, the electric push rod 31 does not operate.
[0060] The control logic of the meteorological monitoring unit 40 is as follows: If the temperature is <0℃ and rainfall is detected within the second preset time, it is determined to be freezing rain. The electric push rod 31 is controlled to raise the wind deflector 32 to form a calm wind zone for 1 minute and then reset. If the temperature is <0℃ but there is no rainfall within the second preset time, the wind deflector 32 is not raised, and the weight of ice accumulation on the wires is recorded and maintained according to the data of the previous second preset time. If the first preset time meets the condition of no freezing rain, the wind deflector 32 is forcibly raised and measured once to ensure data continuity. If the temperature is >0℃, the electric push rod 31 does not work.
[0061] This application employs an intermittent measurement method, with the sampling frequency set to different preset intervals depending on various environmental conditions, to reduce power consumption and adapt to outdoor environments. Furthermore, this method controls the windbreak 32 to rise only under freezing rain conditions, minimizing interference with the formation of rime ice.
[0062] In one embodiment, before the wind-resistant vibration unit 30 operates, the wind direction and speed sensor 60 detects whether the ambient wind speed is greater than 0; if it is greater than 0, the control unit 10 controls the wind-resistant vibration unit 30 to rise; if the wind speed is equal to 0, the wind-resistant vibration unit 30 does not operate.
[0063] In practice, sub-zero temperatures or sub-zero rainfall environments do not necessarily have wind. Activating the anti-wind vibration unit 30 requires a significant amount of power. Therefore, before activating the anti-wind vibration unit 30, the wind direction and speed sensor 60 can detect whether the ambient wind speed is greater than 0. If it is greater than 0, the anti-wind vibration unit 30 is activated; if it is equal to 0, the anti-wind vibration unit 30 is not activated. At the same time, the weight detection unit 20 can complete the detection quickly, avoiding inaccurate detection due to sudden ambient winds, while also saving power.
[0064] In one embodiment, the wind direction and speed sensor 60 detects the wind direction and transmits the data to the control unit 10. The control unit 10 controls the rotating unit 50 to drive the anti-wind vibration unit 30 to rotate, so as to block the wind from different directions.
[0065] Specifically, if the wind direction and speed sensor 60 detects a wind speed greater than 0, the control unit 10 simultaneously determines the wind direction and controls the rotation unit 50 to rotate the anti-wind vibration unit 30 to a direction that can block the wind. This can be done before the wind deflector 32 is raised, during the wind deflector 32 is raised, or after the wind deflector 32 is raised and before the weight detection unit 20 works. There is no limitation here, and it can be determined according to the specific situation.
Claims
1. An automatic monitoring device for the weight of ice buildup on power lines to prevent wind vibration, characterized in that, It includes a control unit, a weight detection unit, a wind-resistant vibration unit, and a meteorological monitoring unit; the wire to be tested is installed in the weight detection unit, and the wind-resistant vibration unit, the weight detection unit, and the meteorological monitoring unit are respectively communicatively connected to the control unit; The wind-resistant vibration unit includes several electric push rods, several wind baffles, and a fixed connection part. The two sides of the wind baffles are installed on the electric push rods through the fixed connection part. When the electric push rod is in the first state, the height of the top of the wind baffle is less than the height of the conductor. When the electric push rod is in the second state, the projection of the conductor toward the wind baffle coincides with the projection of the wind baffle.
2. The automatic monitoring device for the weight of ice accumulation on power lines to prevent wind vibration as described in claim 1, characterized in that, The wind-resistant vibration unit is positioned in the first direction of the weight detection unit, and there is a preset angle between the wind-resistant plates.
3. The automatic monitoring device for the weight of ice accumulation on power lines to prevent wind vibration as described in claim 2, characterized in that, The automatic monitoring device for the weight of ice accumulation on power lines is also equipped with a wind direction and speed sensor and a rotation unit. The wind direction and speed sensor and the rotation unit are respectively connected to the control unit. The control unit controls the rotation unit to rotate according to the wind direction data collected by the wind direction and speed sensor. The rotation unit includes a drive motor and a turntable. The drive motor drives the turntable to rotate. The anti-wind vibration unit and / or the weight monitoring unit are installed on the turntable.
4. The automatic monitoring device for the weight of ice accumulation on power lines to prevent wind vibration as described in claim 3, characterized in that, The turntable is installed at the bottom of the weight detection unit. When the windproof vibration unit is fixed and in the second state, and the wind direction and speed sensor detects a second wind direction different from the first direction, the control unit controls the drive motor to drive the turntable to rotate so that the direction of the conductor is parallel to the second wind direction.
5. The automatic monitoring device for the weight of ice accumulation on power lines to prevent wind vibration as described in claim 3, characterized in that, The turntable is installed at the bottom of the windproof vibration unit. The rotating unit is also provided with a track. The drive motor drives the turntable to rotate around the track. The track is arranged circumferentially around the weight detection unit. The rotating unit drives the windproof vibration unit to rotate to the windward side of the weight detection unit.
6. The automatic monitoring device for the weight of ice accumulation on power lines to prevent wind vibration as described in claim 1, characterized in that, The weight detection unit includes a support rod, a weighing sensor, and a protective shell. There are two support rods, and a weighing sensor is fixed on the top of each support rod. The wire is installed above the weighing sensor.
7. The automatic monitoring device for the weight of ice accumulation on power lines to prevent wind vibration as described in claim 1, characterized in that, The meteorological detection unit includes a precipitation weather phenomenon instrument and a temperature sensor.
8. An automatic method for detecting the weight of ice accumulation on electrical wires, characterized in that: Using the automatic monitoring device for the weight of ice buildup on power lines to prevent wind vibration as described in any one of claims 1-7 includes the following steps: S1. The meteorological monitoring unit detects whether the ambient temperature is below zero and transmits the detected ambient temperature data to the control unit; if not, the windproof vibration unit stops working and the weight detection unit works once every first preset time; if yes, proceed to step S2. S2. Detect whether the weather is rainy and transmit the detected weather information to the control unit. If the weather is rainy, the windproof vibration unit will work once every second preset time, and the weight detection unit will collect information once every second preset time. If the weather is not rainy, the windproof vibration unit will work once every first preset time, and the weight detection unit will collect information once every first preset time. The duration of the first preset time is greater than the duration of the second preset time.
9. The automatic detection method for the weight of ice accumulation on electrical wires according to claim 8, characterized in that, Before the wind-resistant vibration unit operates, a wind direction and speed sensor is used to detect whether the ambient wind speed is greater than 0. If it is greater than 0, the control unit controls the wind-resistant vibration unit to rise. If the wind speed is equal to 0, the wind-resistant vibration unit does not operate.
10. The automatic detection method for the weight of ice accumulation on electrical wires according to claim 9, characterized in that, The wind direction and speed sensor detects the wind direction and transmits the data to the control unit. The control unit then controls the rotating unit to rotate the anti-wind vibration unit to block wind from different directions.