Comprehensive monitoring device for state of overhead transmission conductor

Abstract

The utility model provides an overhead transmission conductor state comprehensive monitoring device, which comprises a power supply module, a solar power taking module, a main processor, a wireless communication module, a conductor current-carrying capacity module, a conductor temperature module, an environment detection module, a vibration module and an alarm module, and is characterized in that the conductor current-carrying capacity module is used for collecting conductor current-carrying capacity signals and transmitting the signals to the main processor; the wire temperature module is used for collecting wire temperature signals and transmitting the signals to the main processor. The environment detection module is used for collecting environment temperature and humidity signals and transmitting the signals to the main processor. The vibration module is used for detecting an overall inclination angle change signal of the comprehensive monitoring device and an external abnormal vibration signal; wherein the main processor is internally provided with a comprehensive analysis unit which is used for analyzing the state of each module in the normal working state. According to the utility model, the problems of single data acquisition mode, high power consumption, high cost, and difficult guarantee of safety, timeliness and accuracy in complex overhead transmission conductor inspection in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution automation, and particularly relates to a comprehensive monitoring device for the state of overhead transmission conductors. Background Art

[0002] With the rapid development of power grid construction, power supply has become the basic guarantee for social production and people's livelihood. Transmission lines bear the heavy responsibility of delivering electric energy to all directions. Overhead transmission conductors are mostly used for long-distance power transmission. They have a wide coverage area and are exposed outdoors for a long time. Most of their operating reliability depends on the regular maintenance of inspection personnel. Due to their complex laying environment and susceptibility to climate factors, it adds a lot of difficulties to the daily maintenance work.

[0003] With the improvement of the monitoring requirements for overhead transmission systems, the overall requirements for overhead transmission automation devices are also getting higher and higher. Currently, the overhead transmission conductor monitoring devices on the market only collect and report single data, lacking real-time monitoring of state quantities such as conductor current-carrying capacity, conductor temperature, ambient temperature and humidity, etc.

[0004] In addition, currently, the power supply mainly adopts CT power supply taking and solar power supply taking modes. However, once the CT is accidentally damaged or in case of continuous rainy weather, the device will not be able to work normally. At the same time, there are also problems such as high power consumption, high cost, and insecurity. Content of the Utility Model

[0005] A comprehensive monitoring device for the state of overhead transmission conductors provided by the utility model is used to solve the complex problems of overhead transmission conductor inspection existing in the prior art, such as single data acquisition method, high power consumption, high cost, and difficulty in ensuring safety, timeliness, and accuracy.

[0006] The utility model realizes the above object through the following technical solutions:

[0007] A comprehensive monitoring device for the state of overhead transmission conductors includes:

[0008] A power supply module for providing a working power supply;

[0009] A solar power supply taking module for converting the obtained solar energy into electric energy and transmitting it to the comprehensive monitoring device to realize self-power supply by solar energy;

[0010] A main processor for processing input data and controlling output signals;

[0011] A wireless communication module, through which the main processor communicates with a distribution network master station or a sub-station or a monitoring terminal over a long distance;

[0012] A conductor current-carrying capacity module, which is connected to the main processor and is used for collecting conductor current-carrying capacity signals and transmitting them to the main processor;

[0013] A wire temperature module, which is connected to the main processor and is used to collect wire temperature signals and transmit them to the main processor;

[0014] An environment detection module, which is connected to the main processor and is used to collect environmental temperature and humidity signals and transmit them to the main processor;

[0015] A vibration module, which is connected to the main processor and is used to detect the overall tilt angle change signal of the integrated monitoring device and external abnormal vibration signals, and output a level signal to the main processor through an IO port;

[0016] An alarm module, which is connected to the main processor and is used to output alarm information outward according to the alarm signal sent by the main processor.

[0017] A further solution is that at least 1 analog input loop is provided in the wire current-carrying capacity module, and an analog conversion element RN8209D is provided at the analog input loop, which is used to convert the collected current analog quantity into a digital quantity value, and transmit the digital quantity value to the main processor through the internal digital conversion element thereof.

[0018] A further solution is that the wire temperature module is at least one of an NTC thermistor, a PT100 thermocouple, a thermosensitive capacitor, and a temperature acquisition chip.

[0019] A further solution is that the vibration module is provided with at least 1 first digital input loop, and an MEMS accelerometer ADXL345 is provided at the first digital input loop. The vibration value of the device is detected through the three-axis acceleration values of different position points during the vibration movement of the integrated monitoring device at the point to be measured; when the external vibration is abnormal, the three-axis acceleration instantaneous relative change value collected by the vibration module is greater than the three-axis acceleration set threshold, and the MEMS accelerometer ADXL345 outputs a level signal through the IO port to actively wake up the main processor.

[0020] A further solution is that the environment detection module is provided with at least 1 second digital input loop, and a digital conversion element STH30 is provided at the second digital input loop, which is used to convert the environment change signal into environment temperature and humidity digital signals and transmit them to the main processor.

[0021] A further solution is that the wireless communication module is at least one of a 2.4GHz module, ZigBee, LoRa, Wi-Fi, or Bluetooth.

[0022] A further solution is that it further includes a watchdog module, and the watchdog module includes a counter reload module and a counter; the counter reload module includes a counter monitor and an enable control unit; the enable control unit controls the enable state of the counter monitor; the counter monitor monitors the counting of the counter, and when it monitors that the counting of the counter reaches a preset counting threshold and the power mode is in the first preset mode, it sends a first reload signal; the watchdog module controls the counter to be reloaded; the counter in the watchdog module is monitored through the counter reload module, and the counter is reloaded before the counting of the counter overflows.

[0023] A further solution is that the main processor is an integrated ultra-low-power microcontroller with power management.

[0024] A further solution is that the comprehensive monitoring device is installed at the measuring point to be measured on the transmission line conductor in a snap-fastening manner, and the device is fixed by applying upper and lower pressure adhesives to prevent the device from shaking randomly and deviating from the measuring point to be measured.

[0025] A further solution is that the wire temperature module further includes a temperature calibration unit, and the temperature calibration unit is sequentially connected to a temperature sensor, a signal conditioning circuit, and an analog-to-digital conversion circuit provided 5 to 20 cm away from the measuring point to be measured. The temperature sensor is connected to the signal conditioning circuit, the signal conditioning circuit is connected to the analog-to-digital conversion circuit, and the digital signal output end of the analog-to-digital conversion circuit is connected to the calibration signal input end of the main processor.

[0026] It can be seen that the comprehensive monitoring device for the state of overhead transmission line conductors provided by the present invention involves state monitoring quantities such as wire ampacity, wire temperature, ambient temperature and humidity, and wire vibration trajectory. It can monitor the overhead transmission line itself and its surrounding environment in real time, locate and warn the fault point in time, and can fully adapt to various laying environments of overhead transmission lines, improving the safety of the operation of overhead transmission lines.

[0027] The following further describes the present invention in detail with reference to the drawings and specific embodiments. Description of the Drawings

[0028] Figure 1 is the schematic diagram of an embodiment of a comprehensive monitoring device for the state of overhead transmission line conductors of the present invention.

[0029] Figure 2 is the circuit schematic diagram of the vibration module in an embodiment of a comprehensive monitoring device for the state of overhead transmission line conductors of the present invention.

[0030] Figure 3 is the circuit schematic diagram of the main processor in an embodiment of a comprehensive monitoring device for the state of overhead transmission line conductors of the present invention.

[0031] Figure 4 This is the circuit schematic diagram of the power supply module in an embodiment of a comprehensive monitoring device for the state of overhead transmission lines of the present utility model. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] Refer to Figure 1 , a comprehensive monitoring device for the state of overhead transmission lines according to the present utility model includes:

[0034] A main processor 1, configured to process input data and control output signals;

[0035] A power supply module 2, configured to provide a working power supply;

[0036] A solar power acquisition module 3, configured to convert the acquired solar energy into electrical energy and transmit it to the comprehensive monitoring device to achieve self-power generation from solar energy;

[0037] A wireless communication module 4, through which the main processor 1 communicates with a distribution network master station or a sub-station or a monitoring terminal over a long distance;

[0038] A wire current-carrying capacity module 5, connected to the main processor 1, configured to collect wire current-carrying capacity signals and transmit them to the main processor 1;

[0039] A wire temperature module 6, connected to the main processor 1, configured to collect wire temperature signals and transmit them to the main processor 1;

[0040] An environment detection module 7, connected to the main processor 1, configured to collect environmental temperature and humidity signals and transmit them to the main processor 1;

[0041] A vibration module 8, connected to the main processor 1, configured to detect the change signal of the overall tilt angle of the comprehensive monitoring device and external abnormal vibration signals, and output a level signal to the main processor 1 through an IO port;

[0042] An alarm module 9, connected to the main processor 1, configured to output alarm information outward according to the alarm signal sent by the main processor 1.

[0043] In this embodiment, there is at least one analog input loop in the wire current-carrying capacity module 5. An analog conversion element RN8209D is provided at the analog input loop, which is used to convert the collected current analog quantity into a digital quantity value and transmit the digital quantity value to the main processor 1 through the internal digital conversion element thereof.

[0044] In this embodiment, the wire temperature module 6 is at least one of an NTC thermistor, a PT100 thermocouple, a thermosensitive capacitor, and a temperature acquisition chip.

[0045] Specifically, this device is equipped with a collection module for various status quantities. The main processor 1 controls the wire current-carrying capacity module 5, the wire temperature module 6, and the environmental detection module 7 through digital signals to collect the current-carrying capacity information, temperature information, and environmental status information of the overhead transmission line. It autonomously calculates the effective value of the current-carrying capacity, the temperature value, and the environmental status value of the overhead transmission line in real time, and then converts them into digital quantities and transmits them to the main processor 1. The main processor 1 transmits the real-time wire current-carrying capacity information, temperature information, and environmental status information to the upper computer. There is a comprehensive processing library set in the upper computer. This processing library will automatically process the status quantities in the normal working state of the wire current-carrying capacity module 5, the wire temperature module 6, and the environmental detection module 7, automatically keep a single module constant, and update the upper and lower limits of the normal working ranges of the other two parameters in real time, and scientifically optimize the alarm mechanism of the device to avoid false alarms of the device and increase the maintenance cost of the inspection personnel. It can be seen that the upper computer analyzes the real-time operating status of the overhead transmission line, combines the classification mechanism of the comprehensive processing library, and enriches the data content of the comprehensive analysis library itself in combination with the current data information. The comprehensive analysis library can specialize in the overhead transmission line under different laying environments and scientifically analyze the operating reliability of the overhead transmission line in real time. Of course, this embodiment mainly provides a comprehensive monitoring device for the status of overhead transmission lines, which can comprehensively detect or monitor the status of overhead transmission lines. The processing and analysis involved in the upper computer are only common data processing.

[0046] In this embodiment, as Figure 2As shown, the vibration module 8 is provided with at least one first digital input circuit. At the first digital input circuit, there is a MEMS accelerometer ADXL345 U1, which detects the vibration value of the device by comprehensively monitoring the triaxial acceleration values at different position points during the vibration movement at the point to be measured. When the external vibration is abnormal, the vibration module 8 collects that the instantaneous relative change value of the triaxial acceleration is greater than the set threshold of the triaxial acceleration, and the MEMS accelerometer ADXL345 U1 actively wakes up the main processor 1 by outputting a level signal through the IO port. It can be seen that in this embodiment, through the vibration module 8, the acceleration change of the overhead transmission line can be detected in real time, and by combining the acceleration data with algorithms, relevant abnormal situations can be predicted and judged in a timely manner, and in certain cases, serious faults of the monitored overhead transmission line can be avoided in advance.

[0047] In this embodiment, the environment detection module 7 is provided with at least one second digital input circuit. At the second digital input circuit, there is a digital conversion element STH30, which is used to convert the environmental change signal into environmental temperature and humidity digital signals and transmit them to the main processor 1.

[0048] In this embodiment, the wireless communication module is at least one of a 2.4GHz module, ZigBee, LoRa, Wi-Fi or Bluetooth. Among them, the network search mode and power consumption management of the wireless communication module 4 are both controlled by the main processor 1. After the main processor 1 sends a network search request to the wireless communication module 4, the wireless communication module 4 will independently complete the networking and stable data communication connection with the data transmission base station, and timely feedback the real-time state of the networking to the main processor 1. When the main processor 1 needs to report data, it will first confirm whether the wireless communication module 4 has a stable wireless communication connection state. Otherwise, the data of the main processor 1 will be temporarily stored in the buffer area, and after independently completing the communication connection, the data will be repackaged and reported to the data transmission base station.

[0049] In this embodiment, it further includes a watchdog module 11. The watchdog module 11 includes a counter reload module and a counter. The counter reload module includes a counter monitor and an enable control unit. The enable control unit controls the enable state of the counter monitor. The counter monitor monitors the counting of the counter and sends a first reload signal when it detects that the counting of the counter reaches a preset counting threshold and the power mode is in a first preset mode. The watchdog module 11 controls the counter to be reloaded. The counter in the watchdog module 11 is monitored through the counter reload module, and the counter is reloaded before the counting of the counter overflows. The watchdog automatic reload system of the embodiment of the present application adds a counter reload module on the basis of the existing watchdog, and does not require the MCU to be woken up regularly. Compared with the existing solution of waking up the MCU regularly to reload the counter, the power consumption of this watchdog automatic reload system is lower. The newly added counter reload module does not affect the function of the original watchdog counter reload instruction, and the software logic is also simpler. Among them, the enable signal is a configurable item, which can be set manually by the user or set through software. For example, the enable signal can be configured as: a high-level signal is in the enable state, and a low-level signal is in the non-enable state. It can be seen that this device is equipped with a watchdog module 11, which can prevent the program from getting into an infinite loop. At the same time, the main processor 1 has a built-in watchdog, and the two complement each other to ensure the stable operation of the device.

[0050] In this embodiment, as Figure 3 shown, the main processor 1 is an integrated ultra-low-power microcontroller with power management. Preferably, the main processor 1 uses an MCU chip of a 32-bit ARM Cortex-M4F-based processor from Analog Devices Inc, USA. The chip has a processing speed of 26MHz, has a powerful data processing ability, has rich on-chip peripherals, has a strong control and processing ability, and has an ultra-low-power management controller that can operate independently of the rest of the system.

[0051] In this embodiment, the comprehensive monitoring device is installed at the measurement point to be measured on the transmission line conductor by means of a buckle, and the device is fixed by applying upper and lower pressure rubber to prevent the device from shaking randomly and deviating from the measurement point to be measured.

[0052] In this embodiment, the wire temperature module 6 further includes a temperature calibration unit 10. The temperature calibration unit 10 is successively connected to a temperature sensor, a signal conditioning circuit, and an analog-to-digital conversion circuit that are disposed at a position 5 to 20 cm away from the point to be measured. The temperature sensor is connected to the signal conditioning circuit, the signal conditioning circuit is connected to the analog-to-digital conversion circuit, and the digital signal output end of the analog-to-digital conversion circuit is connected to the calibration signal input end of the main processor 1. The temperature sensor of the temperature sensing unit in the wireless temperature measurement unit is arranged on the surface of the object to be measured or the energized object to be measured, and the temperature sensor of the temperature calibration unit 10 is arranged at a position 5 to 20 cm away from the object to be measured or the energized object to be measured; the temperature signals measured by the two temperature sensors are respectively sent to the temperature signal input end and the calibration signal input end of the CPU after signal conditioning and analog-to-digital conversion; the CPU calculates the temperature difference between the temperatures measured by the two temperature sensors; the wireless transceiver module of the wireless communication terminal receives the wireless signal, the CPU obtains the temperature difference, and sends it to the communication end of the industrial control computer; the industrial control computer judges whether the surface temperature of the monitored point measured is normal according to the temperature difference, and alarms and makes a record when an abnormality is found.

[0053] In this embodiment, as Figure 4 shown, the power supply module 2 and the solar power acquisition module 3 of this device mainly include a rechargeable lithium battery, a solar power acquisition circuit, a current stabilization circuit, and a voltage stabilization circuit. The solar power acquisition circuit converts light energy into electrical energy, and outputs a charging current of 0.5 A through the current stabilization circuit to supplement electrical energy to the rechargeable lithium battery. The 3.7 V rechargeable lithium battery outputs a voltage of 3.3 V through the voltage stabilization circuit to provide a stable and reliable power supply for the main processor 1, the wireless communication module 4, the wire current-carrying capacity module 5, the wire temperature module 6, the vibration module 8, the environmental detection module 7, and the watchdog module 11.

[0054] Therefore, the comprehensive monitoring device for the state of overhead transmission lines provided in this embodiment involves state monitoring quantities such as wire current-carrying capacity, wire temperature, environmental temperature and humidity, and wire vibration trajectory, and can monitor the overhead transmission line itself and its surrounding environment in real time, locate the fault point in time and give an early warning, and can fully adapt to various laying environments of overhead transmission lines, improving the safety of the operation of overhead transmission lines.

[0055] The above-mentioned implementation manners are only the preferred implementation manners of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. A comprehensive monitoring device for the status of an overhead power transmission line, characterized in that: include: A power module, used to provide working power; The solar power collection module is used to convert the obtained solar energy into electrical energy and transmit it to the comprehensive monitoring device to achieve self-collection of solar energy; A main processor for processing input data and controlling output signals; A wireless communication module, through which the main processor communicates with a distribution network master station or a substation or a monitoring terminal over long distances; A wire current carrying capacity module, the wire current carrying capacity module is connected to the main processor and is used to collect wire current carrying capacity signals and transmit them to the main processor; A conductor temperature module, the conductor temperature module is connected to the main processor and is used to collect conductor temperature signals and transmit them to the main processor; An environment detection module, which is connected to the main processor and is used to collect environmental temperature and humidity signals and transmit them to the main processor; A vibration module, which is connected to the main processor and is used to detect the overall tilt angle change signal of the integrated monitoring device and the external abnormal vibration signal, and output a level signal to the main processor through an IO port; An alarm module, the alarm module is connected to the main processor and is used to output alarm information according to the alarm signal sent by the main processor; Among them, at least one analog input circuit is arranged in the wire current carrying capacity module, and an analog conversion element is arranged at the analog input circuit for converting the collected current analog quantity into a digital value, and transmitting the digital value to the main processor through its internal digital conversion element.

2. The device for comprehensive monitoring of the state of overhead power transmission lines according to claim 1, characterized in that: The wire temperature module is at least one of an NTC thermistor, a PT100 thermocouple, a thermistor capacitor and a temperature acquisition chip.

3. The device for comprehensive monitoring of the state of overhead power transmission lines according to claim 1, characterized in that: The vibration module is provided with at least one first digital quantity input circuit, and a MEMS accelerometer ADXL345 is provided at the first digital quantity input circuit. The vibration value of the device is detected by the three-axis acceleration values ​​of different positions of the comprehensive monitoring device during the vibration movement of the point to be measured.

4. The device for comprehensive monitoring of the state of overhead power transmission lines according to claim 1, characterized in that: The environment detection module is provided with at least one second digital quantity input circuit, and a digital quantity conversion element STH30 is provided at the second digital quantity input circuit for converting the environment change signal into the environment temperature and humidity digital signal and transmitting it to the main processor.

5. The device for comprehensive monitoring of the state of overhead power transmission lines according to claim 1, characterized in that: The wireless communication module is at least one of a 2.4 GHz module, ZigBee, LoRa, Wi-Fi or Bluetooth.

6. The device for comprehensive monitoring of the state of overhead power transmission lines according to any one of claims 1 to 5, characterized in that: The main processor is an ultra-low power consumption microcontroller integrated with power consumption management.

7. The device for comprehensive monitoring of the state of overhead power transmission lines according to any one of claims 1 to 5, characterized in that: The comprehensive monitoring device is installed on the point to be measured of the transmission line conductor by means of a snap-fit ​​method, and the device is fixed by means of upper and lower gluing to prevent the device from shaking at will and deviating from the point to be measured.

8. The device for comprehensive monitoring of the state of overhead power transmission lines according to claim 7, characterized in that: The conductor temperature module also includes a temperature calibration unit, which is connected in sequence to a temperature sensor, a signal conditioning circuit and an analog-to-digital conversion circuit located 5 to 20 cm away from the point to be measured. The temperature sensor is connected to the signal conditioning circuit, the signal conditioning circuit is connected to the analog-to-digital conversion circuit, and the digital signal output end of the analog-to-digital conversion circuit is connected to the calibration signal input end of the main processor.

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