Power transmission line sag monitoring device
By installing an accelerometer on a high-voltage transmission line and using radio frequency circuits and an MCU module for data transmission, the technical problems existing in the prior art have been solved. Through the installation of the accelerometer on the high-voltage transmission line and the transmission of data obtained from its triaxial accelerometer to the MCU module, high-precision and high-frequency sag angle monitoring is achieved, overcoming the problem of poor accuracy in existing technologies.
Patent Information
- Application Number
- CN202520416484.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In the existing technology, the sag monitoring device for high-voltage transmission lines has problems such as poor accuracy and difficulty in obtaining high-frequency micro-vibration responses, making it difficult to achieve high-precision and real-time sag condition monitoring.
A monitoring device for high-voltage transmission lines that uses accelerometers to acquire the horizontal, vertical, and axial acceleration components of the transmission line; a target high-voltage transmission line sag monitoring device that receives and transmits the monitoring data of the target high-voltage transmission line through an RF circuit module; and a data transmission device that uses accelerometers to transmit triaxial data to an MCU module to obtain the sag angle of the transmission line.
It has achieved higher precision and higher frequency sag angle monitoring, improving the real-time monitoring accuracy and information richness of transmission line status.
Smart Images
Figure CN223769502U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of overhead power transmission line monitoring technology, and in particular to a power transmission line sag monitoring device. Background Technology
[0002] High-voltage transmission lines play an increasingly important role in the power system, primarily because they are the structures used to transmit electrical energy, and electricity demand is also steadily rising. Sag is a crucial parameter of high-voltage transmission lines; its magnitude directly reflects the safety status of the transmission line. Therefore, monitoring the sag of high-voltage transmission lines is essential.
[0003] Traditional monitoring methods for power transmission lines include manual surveying and inspection, mechanical modeling, image observation, and mobile measurement. Among these, the method of calculating the sag of power transmission lines using inclinometer observation data is widely used due to its simple and rapid installation and deployment process. This method mainly uses inclinometers deployed on the power transmission line to calculate the conductor sag, thereby monitoring the installation status of the power transmission line.
[0004] Compared to high-precision methods such as image observation and motion measurement, transmission line sag devices installed using inclinometers have significant advantages such as low manpower and material costs. However, due to the limitations of the inclinometer's own observation properties, its accuracy is relatively poor, and it is not sensitive to high-frequency micro-vibrations, making it difficult to obtain high-precision and real-time transmission line sag status. Utility Model Content
[0005] In view of this, it is necessary to provide a power transmission line sag monitoring device to solve the technical problem of difficulty in obtaining high-precision and real-time power transmission line sag status in the existing technology.
[0006] To achieve the above objectives, this utility model provides a power transmission line sag monitoring device, comprising: an accelerometer installed at the connection between the insulator string and the target high-voltage transmission line, for acquiring monitoring data of the target high-voltage transmission line; the monitoring data includes: the acceleration component of the target high-voltage transmission line in the horizontal direction, the acceleration component in the vertical direction, and the acceleration component in the axial direction.
[0007] The radio frequency circuit module, which communicates with the accelerometer, is used to receive and transmit monitoring data of the target high-voltage transmission line;
[0008] The MCU module, which communicates with the RF circuit module, is used to receive and obtain the sag angle of the transmission line based on the monitoring data of the target high-voltage transmission line.
[0009] In one possible implementation, the radio frequency circuit module, communicatively connected to the accelerometer, includes:
[0010] The radio frequency circuit module communicates with the accelerometer via a serial data cable.
[0011] In one possible implementation, the device further includes a battery management module electrically connected to the accelerometer and the MCU module, for providing power to the accelerometer and the MCU module respectively.
[0012] In one possible implementation, the battery management module further includes a DC-DC-Buck circuit electrically connected to the accelerometer and the MCU module, for receiving input high-voltage AC power and stepping down the high-voltage AC power to obtain low-voltage AC power, and providing power to the accelerometer and the MCU module based on the low-voltage AC power.
[0013] In one possible implementation, the provision of power to the accelerometer and the MCU module based on the low-voltage AC power includes:
[0014] The accelerometer is powered by 3.8V AC and the MCU module is powered by 3.3V AC.
[0015] In one possible implementation, the battery management module further includes a battery interface unit electrically connected to the DC-DC-Buck circuit for acquiring externally input high-voltage AC power and outputting the high-voltage AC power to the DC-DC-Buck circuit.
[0016] In one possible implementation, the battery management module further includes a solar interface unit electrically connected to the DC-DC-Buck circuit for acquiring high-voltage AC power output from the solar panel and outputting the high-voltage AC power to the DC-DC-Buck circuit.
[0017] In one possible implementation, the MCU module is an STM32L417ZET6.
[0018] In one possible implementation, the radio frequency circuit module is model LLCC68.
[0019] In one possible implementation, the accelerometer is model IMU426065.
[0020] This invention provides a power transmission line sag monitoring device, which mainly uses an accelerometer. Taking advantage of its triaxial data observation characteristics, the device transmits the triaxial data of the target high-voltage power transmission line, including the horizontal acceleration component, vertical acceleration component, and axial acceleration component, to the MCU module via an RF circuit module to obtain the sag angle of the target power transmission line. Compared with traditional inclinometers, the triaxial accelerometer provides higher frequency and richer observation information, thus enabling the acquisition of a more accurate sag angle of the target power transmission line. Attached Figure Description
[0021] Figure 1 This is a structural diagram of the power transmission line sag monitoring device of this utility model;
[0022] Figure 2 This is a schematic diagram of the accelerometer installation position in one embodiment of the power transmission line sag monitoring device of this utility model. Detailed Implementation
[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.
[0024] Figure 1 This is a structural diagram of the power transmission line sag monitoring device of this utility model. Figure 2 This is a schematic diagram of the accelerometer installation position according to an embodiment of the power transmission line sag monitoring device of this utility model, including:
[0025] Accelerometer 101 is installed at the connection between the insulator string and the target high-voltage transmission line to acquire monitoring data of the target high-voltage transmission line. The monitoring data includes the acceleration components of the target high-voltage transmission line in the horizontal direction, the acceleration components in the vertical direction, and the acceleration components in the axial direction.
[0026] The radio frequency circuit module 102 is communicatively connected to the accelerometer 101 and is used to receive and transmit monitoring data of the target high-voltage transmission line.
[0027] The MCU (Municipal Credit Union) module 103 is communicatively connected to the RF circuit module 102 and is used to receive and obtain the sag angle of the transmission line based on the monitoring data of the target high-voltage transmission line.
[0028] Understandably, in Figure 2In this device, the accelerometer 101 can be arranged on both sides of the transmission line. Due to the influence of the Earth's gravity, the accelerometer 101 can provide real-time feedback of the device's deflection angle relative to the equipment coordinate system based on the output value. Therefore, it can be used to obtain the tilt angle at both ends of the transmission line. Compared with traditional inclinometers, the accelerometer 101 has the advantages of higher accuracy and faster response.
[0029] It can be further understood that this device can be deployed at both ends of transmission lines requiring real-time sag monitoring. For a single transmission line, it can be installed at only one end or simultaneously at both ends, specifically at the connection point between the insulator string and the transmission line. To ensure the accuracy of the overall monitoring scheme, the specifications of the MEMS computational velocimeter integrated into this device should meet the following requirements: zero-bias repeatability better than 3 mG, and random walk performance better than 0.056 m / s². .
[0030] It can be further understood that the sag angle of the target transmission line is obtained mainly through the following steps, where the formulas involved are existing technologies.
[0031] Step 1: Equipment Production and Installation
[0032] Use high-strength straps to install the equipment on one or both ends of the transmission line. The installation position should be close to the end of the transmission line to obtain a more accurate value of the inclination angle of the transmission line end.
[0033] Step 2: Calculation of Inclination Angle
[0034] The inclination angle at the end of the transmission line is calculated using the following formula:
[0035]
[0036] in, , and These are the three-axis acceleration components of accelerometer 101, from which the magnitude of the endpoint tilt angle can be obtained.
[0037] Step 3: Calculation of maximum sag of transmission line
[0038] The maximum sag of a transmission line can be determined solely from the inclination angle at one end point. The calculation formula is as follows:
[0039]
[0040] Meanwhile, the maximum sag of the transmission line can also be calculated from the observed tilt angles at both ends, and the calculation formula is as follows:
[0041] .
[0042] In some embodiments of this utility model, the radio frequency circuit module 102 is communicatively connected to the accelerometer 101 and includes:
[0043] The radio frequency circuit module 102 is connected to the accelerometer 101 via a serial data line.
[0044] It is understood that this utility model provides a power transmission line sag monitoring device, which mainly uses an accelerometer 101. Taking advantage of its triaxial data observation characteristics, the accelerometer transmits the triaxial data of the target high-voltage power transmission line, including the horizontal acceleration component, the vertical acceleration component, and the axial acceleration component, to the MCU module 103 via the radio frequency circuit module 102 to obtain the sag angle of the target power transmission line. The observation information of the triaxial accelerometer has a higher frequency and richer observation information than that of the traditional inclinometer, thus obtaining a more accurate sag angle of the target power transmission line.
[0045] In some embodiments of the present invention, the device further includes a battery management module, which is electrically connected to the accelerometer 101 and the MCU module 103, for providing power to the accelerometer 101 and the MCU module 103 respectively.
[0046] It is understood that this utility model provides a power transmission line sag monitoring device, which mainly uses an accelerometer 101. Taking advantage of its triaxial data observation characteristics, the accelerometer transmits the triaxial data of the target high-voltage power transmission line, including the horizontal acceleration component, the vertical acceleration component, and the axial acceleration component, to the MCU module 103 via the radio frequency circuit module 102 to obtain the sag angle of the target power transmission line. The observation information of the triaxial accelerometer has a higher frequency and richer observation information than that of the traditional inclinometer, thus obtaining a more accurate sag angle of the target power transmission line.
[0047] In some embodiments of this utility model, the battery management module further includes a DC-DC-Buck circuit, which is electrically connected to the accelerometer 101 and the MCU module 103, for receiving externally input high-voltage AC power, and stepping down the high-voltage AC power to obtain low-voltage AC power, and providing power to the accelerometer 101 and the MCU module 103 based on the low-voltage AC power.
[0048] It is understood that this utility model provides a power transmission line sag monitoring device, which mainly uses an accelerometer 101. Taking advantage of its triaxial data observation characteristics, the accelerometer transmits the triaxial data of the target high-voltage power transmission line, including the horizontal acceleration component, the vertical acceleration component, and the axial acceleration component, to the MCU module 103 via the radio frequency circuit module 102 to obtain the sag angle of the target power transmission line. The observation information of the triaxial accelerometer has a higher frequency and richer observation information than that of the traditional inclinometer, thus obtaining a more accurate sag angle of the target power transmission line.
[0049] In some embodiments of this utility model, the provision of power to the accelerometer 101 and the MCU module 103 based on the low-voltage AC power includes:
[0050] The accelerometer 101 is powered by 3.8V AC and the MCU module 103 is powered by 3.3V AC.
[0051] It is understood that this utility model provides a power transmission line sag monitoring device, which mainly uses an accelerometer 101. Taking advantage of its triaxial data observation characteristics, the accelerometer transmits the triaxial data of the target high-voltage power transmission line, including the horizontal acceleration component, the vertical acceleration component, and the axial acceleration component, to the MCU module 103 via the radio frequency circuit module 102 to obtain the sag angle of the target power transmission line. The observation information of the triaxial accelerometer has a higher frequency and richer observation information than that of the traditional inclinometer, thus obtaining a more accurate sag angle of the target power transmission line.
[0052] In some embodiments of this utility model, the battery management module further includes: a battery interface, electrically connected to a DC-DC-Buck circuit, for acquiring externally input high-voltage AC power and outputting the high-voltage AC power to the DC-DC-Buck circuit.
[0053] Understandably, this device incorporates a well-designed charging controller circuit to draw power from an external AC transformer and photovoltaic solar panels, enabling the device to achieve self-sufficiency in electrical energy. Due to the limited size of the device and the small size and low power of the photovoltaic panels, the charging control circuit design must meet the requirements of low power consumption and high-efficiency conversion.
[0054] In some embodiments of this utility model, the battery management module further includes: a solar interface, electrically connected to a DC-DC-Buck circuit, for obtaining high-voltage AC power output from the solar panel and outputting the high-voltage AC power to the DC-DC-Buck circuit.
[0055] Understandably, this device incorporates a well-designed charging controller circuit to draw power from an external AC transformer and photovoltaic solar panels, enabling the device to achieve self-sufficiency in electrical energy. Due to the limited size of the device and the small size and low power of the photovoltaic panels, the charging control circuit design must meet the requirements of low power consumption and high-efficiency conversion.
[0056] In some embodiments of this utility model, the MCU module 102 is an STM32L417ZET6.
[0057] Understandably, the STM32L417ZET6 microcontroller, with its UART, SPI, and I2C interfaces meeting application requirements, is currently the most mainstream 32-bit microcontroller. This model combines STMicroelectronics' extended ultra-low power L-series and enhanced performance Z-series, integrating a DSP and a single-precision floating-point unit (FPU) on the ARM Cortex-M4 core. It also features three low-power application modes: less than 1.5uA in standby mode under RTC clock (with 3.3V power supply) and 100uA / MHz in operating mode, meeting the requirements of power transmission line monitoring scenarios.
[0058] In some embodiments of this utility model, the radio frequency circuit module is model LLCC68.
[0059] Understandably, this device, based on the needs of on-site communication and considering the electromagnetic environment of the power transmission line scenario, adopts an SPI interface LoRa module developed based on Semtech's second-generation LoRa RF integrated chip LLCC68 to complete on-site communication. Its operating frequency band is 433~510MHz, the maximum power can reach 22dBm, and the measured communication distance in open areas can reach 5km.
[0060] In some embodiments of this utility model, the accelerometer 101 is model number IMU426065.
[0061] Understandably, in the selection of MEMS accelerometer 101, this device supports the access of different models of MEMS accelerometers. Taking IMU426065 as an example, this sensor includes I3CSM, SPI and I2C serial interfaces, has a VDD operating voltage range of 1.71V to 3.6V, and an independent VDDIO operating voltage range of 1.71V to 3.6V, and has excellent performance.
[0062] The above description represents a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model.
Claims
1. A power line sag monitor apparatus, characterized by, The application relates to a high-voltage transmission line monitoring device. The device comprises: an accelerometer installed at the connection between an insulator string of a target high-voltage transmission line and the target high-voltage transmission line, used to obtain monitoring data of the target high-voltage transmission line; the monitoring data comprises an acceleration component in the horizontal direction, an acceleration component in the vertical direction and an acceleration component in the axial direction of the target high-voltage transmission line; a radio frequency circuit module in communication connection with the accelerometer, used to receive and transmit the monitoring data of the target high-voltage transmission line; 2. The power line sag monitor of claim 1, wherein, an MCU module in communication connection with the radio frequency circuit module, used to receive and obtain the sag angle of the transmission line based on the monitoring data of the target high-voltage transmission line. The radio frequency circuit module in communication connection with the accelerometer comprises:
3. The power line sag monitor of claim 1, wherein, the radio frequency circuit module is in communication connection with the accelerometer through a serial data line.
4. The power line sag monitor of claim 3, wherein, The device further comprises a battery management module in electrical connection with the accelerometer and the MCU module, used to provide electric energy for the accelerometer and the MCU module respectively.
5. The power line sag monitor of claim 4, wherein, The battery management module further comprises a DCDC-Buck circuit in electrical connection with the accelerometer and the MCU module, used to receive input high-voltage alternating current, reduce the voltage based on the high-voltage alternating current to obtain low-voltage alternating current, and provide electric energy for the accelerometer and the MCU module based on the low-voltage alternating current respectively. The provision of electric energy for the accelerometer and the MCU module based on the low-voltage alternating current comprises:
6. The power line sag monitor of claim 3, wherein, provision of 3.8V electric energy for the accelerometer and provision of 3.3V electric energy for the MCU module based on the low-voltage alternating current.
7. The power line sag monitor of claim 6, wherein, The battery management module further comprises a battery interface unit in electrical connection with the DCDC-Buck circuit, used to obtain external input high-voltage alternating current and output the high-voltage alternating current to the DCDC-Buck circuit.
8. The power line sag monitor of claim 1, wherein: The battery management module further comprises a solar interface unit in electrical connection with the DCDC-Buck circuit, used to obtain high-voltage alternating current output by a solar panel and output the high-voltage alternating current to the DCDC-Buck circuit.
9. The power line sag monitor of claim 1, wherein: The model of the MCU module is STM32L417ZET6.
10. The power line sag monitor of claim 1, wherein: The model of the radio frequency circuit module is LLCC68. The model of the accelerometer is IMU426065.