Intelligent monitoring system for micro-power distribution lines

Abstract

The present invention discloses a micro-power distribution line intelligent monitoring system, including a front-end device and a monitoring cloud server installed on a high-voltage transmission line, the monitoring cloud server is connected to the front-end device in communication, the front-end device includes an ultrasonic detection module, a temperature detection module, a video acquisition module, a communication module, a processor, and a power supply module for providing a working current, the processor is electrically connected to the ultrasonic detection module, the temperature detection module, the video acquisition module, and the communication module, and the power supply module includes a battery submodule and a current sensing electronic module that directly takes power from the high-voltage transmission line to output the working current. The present invention can be widely used in the monitoring and early warning of distribution lines, effectively reducing the damage of external factors to the power grid system, avoiding the occurrence of short circuits, ensuring the smooth progress of life and production, and also reducing the labor cost and hardware cost of power system maintenance, reducing the economic losses of power users and power units.

Description

Technical Field

[0001] The present invention relates to the technical field of power system safety detection, and in particular to an intelligent monitoring system for micro-power distribution lines. Background Art

[0002] In recent years, with the development of economy and the continuous improvement of people's living standards, people's demand for electricity has become higher and higher. The power grid system has become more and more dense. While it brings convenience to life and production, the high-voltage lines of the power grid also bring some safety hazards. The dense high-voltage lines are spread across complex environments such as mountains, rivers, lakes, and cities. On the one hand, inspections require a lot of manpower and material resources, and on the other hand, they are inevitably damaged by human or irresistible factors. The failure of power lines will not only threaten the safety of people and property, but also bring inconvenience to production and life.

[0003] While my country's economy is developing rapidly, infrastructure construction such as urbanization, rail transit, and bridges is also progressing steadily. Large construction facilities and construction vehicles can be seen everywhere at construction sites, and power lines are often damaged. According to incomplete statistics, safety accidents caused by construction vehicles scratching transmission lines and related equipment account for more than 50% of the total accidents, and most of these accidents occur at night. According to national statistics, most external force damage accidents are caused by cranes, tower cranes, and concrete pump trucks, accounting for more than 60% of overhead line accidents. When working at night or in bad weather, construction workers' vision is obstructed and they cannot confirm the specific location of high-voltage lines, causing short circuits and disconnections in the lines, which often occur, accounting for more than 70% of external force accidents. In addition, there are also reports of deaths and disabilities caused by accidentally touching transmission lines while fishing or flying kites.

[0004] Therefore, the monitoring system is a key point of the entire smart grid to ensure the safety of the power supply line. At present, the power supply of online monitoring equipment on the transmission and distribution lines has always been a thorny issue. Under normal circumstances, the power supply of online monitoring equipment on the transmission and distribution lines is mostly photovoltaic power, but this power supply method is easily affected by the external climate environment, especially in winter, long periods of cloudy and snowy days will greatly reduce the power supply capacity, often resulting in high manpower and maintenance costs. Summary of the invention

[0005] The present invention proposes a micro-power distribution line intelligent monitoring system to solve the above technical problems.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A micro-power distribution line intelligent monitoring system includes a front-end device installed on a high-voltage transmission line and a monitoring cloud server, wherein the monitoring cloud server is communicatively connected with the front-end device, and the front-end device includes:

[0008] An ultrasonic detection module for detecting the distance between an object below or to the side of the front-end device and the front-end device;

[0009] A temperature detection module for detecting the temperature of the front-end device and the surrounding environment;

[0010] A video acquisition module for acquiring image information of the surrounding environment of the front-end device;

[0011] A communication module for realizing remote communication connection with the monitoring cloud server;

[0012] Used to obtain the data fed back by the ultrasonic detection module, the temperature detection module and the video acquisition module, and transmit it to the processor of the monitoring cloud server through the communication module, and the processor is electrically connected to the ultrasonic detection module, the temperature detection module, the video acquisition module and the communication module;

[0013] And, a power supply module for providing working current to the ultrasonic detection module, temperature detection module, video acquisition module, communication module and processor, the power supply module includes a battery submodule and a current sensing submodule that directly draws power from a high-voltage transmission line to output working current.

[0014] Preferably, the current sensing electronic module includes a power supply CT, a rectifier circuit, a voltage stabilizing circuit and a filter circuit which are electrically connected in sequence, and the output end of the filter circuit is connected to the ultrasonic detection module, the temperature detection module, the video acquisition module, the communication module and the processor.

[0015] Preferably, the current sensing electronic module comprises two or more branches in parallel, each branch comprises a power taking CT, a rectifier circuit, a voltage stabilizing circuit and a filter circuit electrically connected in sequence, the power taking CTs are respectively arranged on adjacent high-voltage transmission lines, the output ends of the filter circuits in each branch are connected to a switching selection circuit, the output ends of the switching selection circuits are connected to the ultrasonic detection module, the temperature detection module, the video acquisition module, the communication module and the processor, the switching selection circuit controls one of the power taking CTs to supply power alone or controls two power taking CTs to supply power simultaneously.

[0016] Preferably, a lightning surge protector and an overload protector are connected between the power taking CT and the rectifier circuit.

[0017] Preferably, the battery submodule includes at least one lithium battery; or, the video acquisition module includes at least three cameras; or, the temperature detection module has a temperature monitoring range of -55°C to 125°C.

[0018] Preferably, the communication module is connected to the monitoring cloud server via radio waves, GPRS, 3G, 4G or 5G communication mode.

[0019] Preferably, the front-end device further comprises a level indication module for assisting the horizontal installation of the front-end device on the high-voltage transmission line, and the level indication module is electrically connected to the processor and the power supply module.

[0020] Preferably, the front-end device further includes an alarm module, which is electrically connected to the processor and the power supply module; or, the front-end device further includes a positioning sensor, which is electrically connected to the processor and the power supply module.

[0021] Preferably, the front-end device further includes a meteorological monitoring module, and the meteorological monitoring module is electrically connected to the processor and the power supply module.

[0022] Preferably, the meteorological monitoring module includes at least one of a wind speed and direction detector, a rainfall sensor, a light monitor, a carbon dioxide detector, a radiation detector, an air temperature and humidity sensor, and an atmospheric pressure sensor.

[0023] Compared with the prior art, the present invention can be widely used in the monitoring and early warning of distribution lines, effectively reducing the damage to the power grid system caused by external factors, avoiding the occurrence of circuit breaks and short circuits, ensuring the smooth progress of life and production, and reducing the labor and hardware costs of power system maintenance, thereby reducing the economic losses of power users and power units. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural block diagram of the micro-power distribution line intelligent monitoring system of the present invention;

[0025] Figure 2 It is a circuit structure diagram of the current sensing electronic module in the micro-power distribution line intelligent monitoring system of the present invention;

[0026] Figure 3 It is a schematic diagram of an equivalent model of a power-taking CT in the micro-power distribution line intelligent monitoring system of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0028] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0029] like Figure 1 As shown, a micro-power distribution line intelligent monitoring system includes a front-end device 1 installed on a high-voltage transmission line and a monitoring cloud server 2, wherein the monitoring cloud server 2 is communicatively connected to the front-end device 1.

[0030] Among them, the front-end device 1 includes: an ultrasonic detection module 11 for detecting the distance between the object below or to the side of the front-end device 1 and the front-end device 1; a temperature detection module 13 for detecting the front-end device 1 and the surrounding environment; a video acquisition module 12 for collecting image information of the surrounding environment of the front-end device 1; a communication module 14 for realizing remote communication connection with the monitoring cloud server 2; a processor 15 for obtaining data fed back by the ultrasonic detection module 11, the temperature detection module 13 and the video acquisition module 12, and transmitting it to the monitoring cloud server 2 through the communication module 14, the processor 15 is electrically connected to the ultrasonic detection module 11, the temperature detection module 13, the video acquisition module 12, and the communication module 14; and a power supply module 16 for providing working current to the ultrasonic detection module 11, the temperature detection module 13, the video acquisition module 12, the communication module 14 and the processor 15, the power supply module 16 includes a battery submodule 162 and a current sensing electronic module 161 that directly draws power from the high-voltage transmission line to output the working current.

[0031] The present invention can realize real-time monitoring of the environmental conditions of the channel around the line, including temperature, construction, tree growth, etc., and can use advanced image data acquisition compression coding and decoding technology, ultra-low power consumption technology, wireless public network data transmission technology, two power supply technologies, ultrasonic ranging technology, etc. to perform all-weather and real-time monitoring of the operating conditions of high-voltage transmission lines operating in harsh environments. The system uses an intuitive way of real-time dynamic video monitoring to enable management personnel to understand the on-site information of the monitoring point at the first time, and can realize picture capture or video continuous shooting under abnormal conditions through manual request, which greatly reduces the labor intensity of patrol personnel, improves the level of safe operation of the line, and provides intuitive and reliable line safety information for line operation units.

[0032] In order to cope with the complex and changeable use environment and not be affected by any weather and external conditions, the power supply module 16 of the front-end device 1 of the present invention adopts two ways of power supply: current sensing power supply module and battery. It is suitable for various harsh scenes. At the same time, two ways of power supply can be adopted, which makes the product more reliable and can better withstand the test of power failure and harsh environment, reducing the operation and maintenance costs of the equipment.

[0033] The current sensing power supply starts to supply power to the device when the transmission line reaches the starting current. When the line has no current due to a circuit breaker, the built-in high-capacity lithium battery can maintain the normal operation of the device until the power returns to normal. At the same time, the control chip inside the device is specifically responsible for intelligent management of the opening and closing of each module to reduce the power consumption of the device. Two power supply methods are used to ensure that the front-end device 1 can operate normally under any circumstances. The current sensing electronic module 161 directly uses a coil and a ring core to obtain AC power from the high-voltage transmission line and then rectifies and outputs a DC source. It can also provide stable power supply when the current fluctuates greatly; the battery submodule 162 is a backup battery, which can automatically supply power to the front-end device 1 when there is no current on the high-voltage transmission line, and timely feedback the circuit breaker information. The battery submodule 162 here can be composed of at least one high-capacity lithium battery.

[0034] like Figure 2 As shown, the current sensing electronic module 161 includes a power CT 1611, a rectifier circuit 1612, a voltage stabilizing circuit 1613 and a filter circuit 1614 which are electrically connected in sequence; the power CT 1611 surrounds the high-voltage transmission line 100, the output end of the power CT 1611 is connected to the input end of the rectifier circuit 1612, the output end of the rectifier circuit 1612 is connected to the input end of the voltage stabilizing circuit 1613, the output end of the voltage stabilizing circuit 1613 is connected to the input end of the filter circuit 1614, and the output end of the filter circuit 1614 is connected to the ultrasonic detection module 11, the temperature detection module 13, the video acquisition module 12, the communication module 14 and the processor 15. The output end of the filter circuit 1614 can be first connected to an energy storage device such as a battery, and then connected to the electrical equipment.

[0035] In one implementation of the present invention, the current sensing electronic module 161 includes two or more branches connected in parallel, each branch includes a power CT 1611, a rectifier circuit 1612, a voltage stabilizing circuit 1613 and a filter circuit 1614 electrically connected in sequence, and the output end of the filter circuit 1614 in each branch is connected to a switching selection circuit, the output end of the switching selection circuit is connected to the ultrasonic detection module 11, the temperature detection module 13, the video acquisition module 12, the communication module 14 and the processor 15, and the switching selection circuit controls one of the power CTs to supply power alone or controls two power CTs to supply power at the same time.

[0036] like Figure 3As shown, the power CT is set on a single high-voltage transmission line, that is, the number of turns of the primary coil is N1=1, and the number of turns of the secondary coil is N2=N, that is, the number of turns of the coil of the power CT is N, and the current of the primary coil and the current of the secondary coil are I1 and I2 respectively, then:

[0037]

[0038] However, when the CT coil is working at a low current, its core magnetizing current I μ Cannot be ignored, so there are:

[0039]

[0040] Then the effective value of the output power P0 of the CT coil can be expressed as:

[0041]

[0042] Among them, S is the cross-sectional area of ​​the core, μ is the magnetic permeability, and L is the magnetic path length of the core.

[0043] In the actual engineering application of product design, U2 is usually designed to be 5V or 3.3V, and the magnitude of the excitation current is determined by this voltage value; at this time, if the core material and related structures are selected, the core cross-sectional area S, magnetic permeability μ, and core magnetic path length L are also determined; under the condition of ensuring that the voltage design value U2 is reached, the extreme value principle and related formulas can be used to calculate the optimal value of the number of turns of the power CT coil at this time, and the practical number of turns of the coil can be obtained by engineering design and debugging based on this optimal value. Here, the annular core of the power CT adopts a small size specially designed for the distribution network, which can greatly reduce the difficulty of installation and the load of the high-voltage transmission line.

[0044] When there are at least two power CTs, each power CT is set on several adjacent high-voltage transmission lines. When the power CT of one branch has insufficient single-circuit line load current, a power outage or a fault in the high-voltage transmission line, the power supply of the processor 15 and each detection module of the front-end device 1 can be guaranteed by the power CT of other branches, so that the front-end device 1 can operate normally.

[0045] In the above circuit, in order to prevent damage due to lightning strike, a lightning surge protector may be connected between the power CT and the rectifier circuit; in order to prevent overload, an overload protector may be connected between the power CT and the rectifier circuit.

[0046] The front-end device 1 of the present invention collects the temperature, image, distance and other information of the high-voltage transmission line area in real time through the ultrasonic detection module 11, the temperature detection module 13, the video acquisition module 12, etc., and transmits it to the remote monitoring cloud server 2 through the network, or to the client, such as a mobile terminal such as a mobile phone, a tablet computer, and a notebook. The circuit elements such as the chip inside the front-end device 1 are all micro-power consumption components, which are energy-saving and environmentally friendly.

[0047] The communication module 14 realizes remote communication connection with the monitoring cloud server 2, and the communication mode that can be adopted can be various forms such as radio waves, GPRS, 3G, 4G or 5G. For example, the communication module 14 can be composed of a 4G module and related circuits to realize long-distance wireless communication, with good communication quality and fast speed, which can meet the data transmission of high-quality video and the like. The 4G module adopts an LTE Cat 4 wireless module designed for M2M and IoT applications, with a maximum downlink rate of 150Mbps and a maximum uplink rate of 50Mbps, comprehensive coverage of various network formats, and MIMO technology to meet the requirements of the wireless communication system for data rate and connection reliability. As long as wireless communication such as 4G or 5G is unobstructed, the communication module 14 can smoothly connect to the monitoring cloud server 2 remotely, and receive and send data stably and reliably. Even in remote mountainous areas with poor network signals, relevant data information can be quickly and timely uploaded to the monitoring cloud server 2.

[0048] The front-end device 1 adopts a wireless network communication mode. Based on a large number of widely distributed base stations, data can be transmitted quickly without the line cost of wired communication, and the installation and maintenance costs are low, eliminating the cost of transfer stations.

[0049] The front-end device 1 may further include a storage module, which is electrically connected to the processor 15 and the power supply module 16, and the storage module is powered by the power supply module 16. The images and data information collected in real time by the ultrasonic detection module 11, the temperature detection module 13, the video acquisition module 12, etc. can be backed up and saved in the storage module while being transmitted to the monitoring cloud server 2. The storage time of the video images and data information can also be set to cover and save them in time, so as to reasonably use the capacity space of the storage module, and also facilitate the monitoring cloud server 2 to retrieve historical data according to demand.

[0050] The front-end device 1 may also include an alarm module 17, which is electrically connected to the processor 15 and the power supply module 16, and the alarm module 17 is powered by the power supply module 16. When the detected data exceeds the set threshold, the alarm module 17 can make an on-site alarm under the control of the processor 15; when the monitoring cloud server 2 analyzes and processes the video collected by the video acquisition module 12 and finds an abnormality, the on-site alarm of the alarm module 17 can also be realized through remote communication. At the same time, after the alarm information is uploaded to the monitoring cloud server 2 through wireless communication, the monitoring cloud server 2 can notify the relevant staff through messages such as text messages and emails, so that the staff can respond and handle quickly after receiving the reminder.

[0051] The alarm can be in the form of sound, light or a combination of sound and light, such as a loud alarm sound emitted by a high-decibel buzzer and a high-frequency flashing of a warning light to provide both a sound reminder and a flash reminder. The alarm sound emitted by a high-decibel buzzer can be as high as 90db and the frequency is 3KHZ. The warning light can be a high-brightness LED light that flashes at a high frequency. When the alarm module 17 is triggered, the high-decibel buzzer emits a loud alarm sound and the high-brightness warning light flashes continuously until the alarm is cleared.

[0052] The ultrasonic detection module 11 is used to detect the distance between the object below or to the side of the front-end device 1 and the front-end device 1, and assist the video acquisition module 12 in obstacle detection. The principle of ultrasonic ranging is to use the known propagation speed of ultrasonic waves in the air, measure the time it takes for the sound wave to reflect back after encountering an obstacle after being emitted, and calculate the actual distance from the emission point to the obstacle based on the time difference between emission and reception. First, the ultrasonic transmitter emits ultrasonic waves in a certain direction, and starts timing at the same time as the emission moment. The ultrasonic wave propagates in the air and returns immediately when it encounters an obstacle on the way. The ultrasonic receiver stops timing immediately when it receives the reflected wave. The propagation speed of ultrasonic waves in the air is C = 340m / s. According to the time T seconds recorded by the timer, the distance L from the emission point to the obstacle can be calculated according to the time difference ranging method, that is: L = C×T / 2. The ultrasonic distance measurement system based on embedded micro-core uses embedded device programming to generate a square wave with a frequency of 40KHz, which is amplified by the transmitting drive circuit to make the transmitting end of the ultrasonic sensor oscillate and emit ultrasonic waves; the ultrasonic waves are reflected by the transmitting object and received by the receiving end of the sensor, and then amplified and shaped by the receiving circuit; when the reflected wave of the ultrasonic wave is received, a jump occurs at the output end of the receiving circuit. The embedded device records the time of ultrasonic emission and the time of the reflected wave, and the time difference is calculated by the timer count to calculate the corresponding distance.

[0053] The ultrasonic detection module 11 can use a closed waterproof transceiver probe with a certain level of dust and water resistance to suit the harsh outdoor environment. Usually, the detection angle of the ultrasonic detection module 11 is 45-65 degrees, preferably 55 degrees, and the detection distance is generally within 4.5 meters. The threshold of the detection distance can be set as needed.

[0054] The video acquisition module 12 is used to collect image information of the surrounding environment of the high-voltage transmission line where the front-end device 1 is located, and transmit the captured pictures and videos to the processor 15 and then transmit them to the monitoring cloud server 2 via the communication module 14. The video acquisition module 12 may include at least three cameras, which may be arranged in an array, so as to collect 180-degree image information under the transmission line in all directions, so as to survey the surrounding environment without blind spots, which greatly facilitates the staff to grasp the on-site situation. The camera may be a high-definition camera with more than 5 million pixels, with both photo and video functions, with a picture resolution of up to 2592×1944, a video frame rate of about 15 to 60 frames per second, and supports autofocus, so that the pictures and videos are of high definition to facilitate remote troubleshooting by power workers.

[0055] The combination of ultrasonic detection module 11 and video acquisition module 12 can realize obstacle detection. Ultrasonic detection module 11 uses ultrasonic detection technology to measure whether the obstacle under the transmission line is at a safe distance, thereby triggering video acquisition module 12. Processor 15 or monitoring cloud server 2 performs differential comparison between the current image and the background image through real-time modeling of the video stream, separates the moving object, and realizes intelligent identification of obstacles. If the distance between the obstacle and the high-voltage transmission line is less than the safe distance, the alarm module 17 is immediately triggered to alarm.

[0056] The temperature detection module 13 is used to detect the temperature of the front-end device 1 and the surrounding environment, and to warn of the occurrence of wildfires and line icing. The temperature detection module 13 can be composed of a temperature sensor and related circuits. The temperature sensor detects the temperature of the environment and the transmission line and transmits it to the processor 15.

[0057] The temperature detection module 13 has a temperature measurement range of -55°C to +125°C, a maximum error of ±0.5°C in the range of -10°C to +85°C, and a maximum error of ±1.5°C in the full temperature range. When the measured temperature exceeds the set threshold, the processor 15 controls the alarm to generate an alarm message and takes a photo to transmit to the server.

[0058] The front-end device 1 also includes a horizontal indication module 18, which is electrically connected to the processor 15 and the power supply module 16. The horizontal indication module 18 can be an electronic horizontal sensor, which assists the front-end device 1 to be simply and quickly installed horizontally on the transmission line. When the horizontal deviation exceeds 15 degrees, the indicator light comes on. In addition, the horizontal indication module 18 can also transmit the horizontal deviation of the front-end device 1 to the processor 15 in real time, and remotely communicate to the monitoring cloud server 2, so as to understand the deviation of the front-end device 1 caused by the vibration of the high-voltage transmission line.

[0059] Furthermore, in order to obtain the climate environment of the location of the high-voltage transmission line in real time, the front-end device 1 may also include a meteorological monitoring module 19 , which is electrically connected to the processor 15 and the power supply module 15 .

[0060] Specifically, the meteorological monitoring module 19 may include at least one of a wind speed and direction detector, a rain sensor, a light detector, a carbon dioxide detector, a radiation detector, an air temperature and humidity sensor, and an atmospheric pressure sensor. The wind speed and direction detector can measure wind parameters such as instantaneous wind speed, instantaneous wind level, average wind speed, and average wind level; the rain sensor can measure rain parameters such as precipitation; the light detector can detect light parameters such as sunlight intensity; the carbon dioxide detector can detect the carbon dioxide concentration of the surrounding environment; the radiation detector can detect the radiation intensity of ultraviolet radiation or other radiation in the surrounding environment; the air temperature and humidity sensor can detect parameters such as air temperature and air humidity; and the atmospheric pressure sensor can detect parameters such as air pressure.

[0061] The front-end device 1 may further include a positioning sensor, which is electrically connected to the processor 15 and the power supply module 16. The positioning sensor is used to locate the geographical location of the front-end device 1 according to the connected navigation system and feed back the positioning information to the processor.

[0062] The present invention can effectively monitor the transmission line at any time to understand the situation in time. The installation location is flexible and convenient, and the device is easy to disassemble. When the monitoring point does not need to be monitored, it can be installed at other monitoring points by itself. The present invention can alleviate frequent power failures to a certain extent, and timely warn people or obstacles that reach a safe distance, which not only avoids casualties and property losses, but also protects the transmission line; compared with traditional manual inspections, the low-power, intelligent monitoring system makes the operation and maintenance of the power network simpler and more efficient, which is of great significance to both the safety protection of the power system and economic development.

[0063] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the claims of the present application.

[0064] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A micro-power distribution line intelligent monitoring system, characterized in that: It includes a front-end device and a monitoring cloud server installed on a high-voltage transmission line, wherein the monitoring cloud server is communicatively connected with the front-end device, and the front-end device includes: An ultrasonic detection module for detecting the distance between an object below or to the side of the front-end device and the front-end device; A temperature detection module for detecting the temperature of the front-end device and the surrounding environment; A video acquisition module for acquiring image information of the surrounding environment of the front-end device; A communication module for realizing remote communication connection with the monitoring cloud server; Used to obtain the data fed back by the ultrasonic detection module, the temperature detection module and the video acquisition module, and transmit it to the processor of the monitoring cloud server through the communication module, and the processor is electrically connected to the ultrasonic detection module, the temperature detection module, the video acquisition module and the communication module; And, a power supply module for providing working current to the ultrasonic detection module, the temperature detection module, the video acquisition module, the communication module and the processor, the power supply module comprising a battery submodule and a current sensing submodule for directly drawing power from a high-voltage transmission line to output working current; The current sensing electronic module includes a power CT, a rectifier circuit, a voltage stabilizing circuit and a filter circuit which are electrically connected in sequence, and the output end of the filter circuit is connected to the ultrasonic detection module, the temperature detection module, the video acquisition module, the communication module and the processor; The current sensing electronic module includes two or more branches connected in parallel, each branch includes a power CT, a rectifier circuit, a voltage stabilizing circuit and a filter circuit electrically connected in sequence, the power CTs are respectively arranged on adjacent high-voltage transmission lines, the output ends of the filter circuits in each branch are connected to a switching selection circuit, the output end of the switching selection circuit is connected to the ultrasonic detection module, the temperature detection module, the video acquisition module, the communication module and the processor, and the switching selection circuit controls one of the power CTs to supply power alone or controls two power CTs to supply power simultaneously; A lightning surge protector and an overload protector are connected between the power taking CT and the rectifier circuit.

2. The micro-power distribution line intelligent monitoring system according to claim 1 is characterized in that: The battery submodule includes at least one lithium battery; or, the video acquisition module includes at least three cameras; or, the temperature detection module has a temperature monitoring range of -55°C to 125°C.

3. The micro-power distribution line intelligent monitoring system according to claim 1 is characterized in that: The communication module is connected to the monitoring cloud server via radio waves, GPRS, 3G, 4G or 5G communication mode.

4. The micro-power distribution line intelligent monitoring system according to claim 1 is characterized in that: The front-end device also includes a level indication module for assisting the front-end device in horizontal installation on the high-voltage transmission line, and the level indication module is electrically connected to the processor and the power supply module.

5. The micro-power distribution line intelligent monitoring system according to claim 1 is characterized in that: The front-end device also includes an alarm module, and the alarm module is electrically connected to the processor and the power supply module.

6. The micro-power distribution line intelligent monitoring system according to any one of claims 1 to 5, characterized in that: The front-end device also includes a micro-meteorological monitoring module, and the micro-meteorological monitoring module is electrically connected to the processor and the power supply module.

7. The micro-power distribution line intelligent monitoring system according to claim 6 is characterized in that: The micro-meteorological monitoring module includes at least one of a wind speed and direction detector, a rainfall sensor, a sunshine monitor, an air temperature and humidity sensor, and an atmospheric pressure sensor.

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