Tower pole installation type non-contact high voltage cable voltage monitoring device

Abstract

The present application relates to the technical field of high-voltage transmission line monitoring, in particular to a tower pole mounted non-contact high-voltage cable voltage monitoring device, which solves the problem that the signal transmission distance of high-voltage transmission line monitoring is limited, and needs to rely on external power supply, and it is difficult to realize remote and normalized monitoring of field tower poles, and the low efficiency also exists monitoring blind area of inspection interval, which cannot meet the intelligent and real-time operation and maintenance requirements of power grid, including a tower pole, a sensor unit, a power taking unit, an energy storage battery, a main control unit, a communication unit, a height increasing pole assembly and a mounting structure, the tower pole surface is provided with a tower pole cross arm, and the height increasing pole assembly is fixed to the tower pole cross arm through the mounting structure. The present application solves the problem of real-time monitoring of old high-voltage tower working conditions, realizes safe, efficient and accurate monitoring of high-voltage cable voltage, and is suitable for normalized monitoring and operation and maintenance of 10Kv-500kV high-voltage transmission line.

Description

Technical Field

[0001] This invention relates to the field of high-voltage transmission line monitoring technology, specifically a tower-mounted non-contact high-voltage cable voltage monitoring device. Background Technology

[0002] High-voltage power transmission is a method of transmitting electricity by stepping up the voltage output from a generator. This method is used because, for the same transmission power, higher voltage results in lower current. High-voltage transmission reduces the current during transmission, thereby lowering heat loss caused by current and reducing material costs for long-distance power transmission.

[0003] Existing high-voltage transmission line monitoring methods typically have limited signal transmission distances, rely on external power sources, and struggle to achieve remote, routine monitoring of outdoor towers. This results in low efficiency and blind spots during inspection intervals, failing to meet the intelligent and real-time operation and maintenance needs of the power grid. Therefore, to address these shortcomings, we propose a tower-mounted, non-contact high-voltage cable voltage monitoring device. Summary of the Invention

[0004] The purpose of this invention is to provide a tower-mounted non-contact high-voltage cable voltage monitoring device to solve the problems mentioned in the background art, such as the limited signal transmission distance of high-voltage transmission line monitoring, the need to rely on external power supply, the difficulty in achieving remote and routine monitoring of outdoor towers, low efficiency, and the existence of monitoring blind spots during inspection intervals, which cannot meet the needs of intelligent and real-time operation and maintenance of the power grid.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tower-mounted non-contact high-voltage cable voltage monitoring device, comprising a tower, a sensor unit, an energy harvesting unit, an energy storage battery, a main control unit, a communication unit, a heightening pole assembly, and mounting structural components;

[0006] The tower surface is provided with a tower crossarm, the heightening pole assembly is fixed to the tower crossarm by a mounting structure, the sensor unit is fixed to the top of the heightening pole assembly, and the energy harvesting unit, energy storage battery, main control unit and communication unit are integrated into a waterproof functional box, which is fixed to the tower crossarm by a mounting structure.

[0007] Preferably, the sensor unit includes a sensing electrode plate, a conditioning circuit, and a rainproof housing. The sensor unit is used to sense the electric field signal of the high-voltage cable, and after processing by the conditioning circuit, it outputs an analog voltage signal that is proportional and in phase with the cable voltage.

[0008] The rainproof outer shell is mushroom-shaped and coated with a hydrophobic layer to prevent rainwater and condensation from forming on the surface.

[0009] Preferably, the energy harvesting unit includes a solar photovoltaic panel, an MPPT charging module, and an energy storage battery, which can continuously supply energy to the device under various lighting conditions.

[0010] Preferably, the main control unit includes an MCU minimum system, a metering module, and various sensor components. The MCU minimum system serves as the functional core of the device, controlling the entire system and other units and sub-modules.

[0011] Preferably, the communication unit includes a protocol adaptation module, a 4G communication module, and an antenna. Each sub-module works in concert to be responsible for communication and data exchange between the device system and the server in a 4G manner.

[0012] Preferably, the height-increasing rod assembly uses a fiberglass insulated rod with a single section length of 1m, which can be combined to form a length of 1 to 3m; the installation structure includes a 304 stainless steel clamp and a functional box fixing bracket to ensure the stability of the installation.

[0013] Preferably, the waterproof housing is made of ABS+PC alloy material, with an operating temperature range of -40 to 85℃, and is equipped with a solar photovoltaic panel on the top.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention, through the cooperation of a communication unit and a main control unit, enables the device to monitor cable conditions in real time by establishing communication with a cloud platform while using welding wire, thereby achieving real-time data transmission to the server. When this device is installed on transmission towers of high-voltage transmission lines, the cloud platform will alarm for abnormal voltage values ​​if a fault occurs on the line, quickly and accurately locating the fault point to a single transmission tower or a section of transmission towers, significantly reducing maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the tower-mounted non-contact high-voltage cable voltage monitoring device of the present invention;

[0017] Figure 2 This is a system block diagram of the tower-mounted non-contact high-voltage cable voltage monitoring device of the present invention;

[0018] Figure 3 This is a flowchart of the energy harvesting unit of the present invention;

[0019] Figure 4 This is a schematic diagram of the electric field sensor of the present invention;

[0020] Figure 5 This is a logic block diagram of the functional testing system of the present invention;

[0021] Figure 6This is a schematic diagram of the functional testing system of the present invention;

[0022] Figure 7 This is a monitoring data graph of the functional testing system of the present invention;

[0023] Figure 8 This is a flowchart illustrating the operation of the tower-mounted non-contact high-voltage cable voltage monitoring device of the present invention. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Please see Figures 1 to 8 The present invention provides an embodiment of a tower-mounted non-contact high-voltage cable voltage monitoring device, comprising a tower, a sensor unit, an energy harvesting unit, an energy storage battery, a main control unit, a communication unit, a heightening pole assembly, and mounting structural components;

[0026] The tower surface is equipped with a tower crossarm. The heightening pole assembly is fixed to the tower crossarm by mounting structural components. The sensor unit is fixed to the top of the heightening pole assembly. The energy harvesting unit, energy storage battery, main control unit, and communication unit are integrated into a waterproof functional box. The functional box is fixed to the tower crossarm by mounting structural components.

[0027] The device, assembled using the above combination, establishes communication with the cloud platform and periodically sends data to the server, thereby achieving real-time monitoring of cable conditions. When this device is installed on the transmission towers of high-voltage transmission lines, if a fault occurs on the line, the cloud platform will issue an alarm for abnormal voltage values, quickly and accurately locating the fault point to a single transmission tower or a section of transmission towers, significantly reducing maintenance costs.

[0028] The sensor unit includes a sensing electrode plate, a conditioning circuit, and a rainproof housing. The sensor unit is used to sense the electric field signal of the high-voltage cable, and after processing by the conditioning circuit, it outputs an analog voltage signal that is proportional and in phase with the cable voltage.

[0029] The rainproof outer shell is mushroom-shaped and coated with a hydrophobic layer to prevent rainwater and condensation from forming on the surface.

[0030] The energy harvesting unit includes solar photovoltaic panels, MPPT charging modules, and energy storage batteries, which are used to continuously supply power to the device under various lighting conditions.

[0031] The main control unit includes the MCU minimum system, the metering module, and various sensor components. The MCU minimum system serves as the functional core of the device, controlling the entire system and other units and sub-modules.

[0032] The communication unit includes a protocol adaptation module, a 4G communication module, and an antenna. The sub-modules work together to be responsible for communication and data exchange between the device system and the server in a 4G manner.

[0033] The height increase pole assembly uses fiberglass insulated poles, with a single section length of 1m, which can be combined to form 1-3m sections; the installation structure includes 304 stainless steel clamps and functional box fixing brackets to ensure the stability of the installation.

[0034] The waterproof housing is made of ABS+PC alloy material, with an operating temperature range of -40 to 85℃, and is equipped with a solar photovoltaic panel on the top.

[0035] For details, please refer to Figure 1 There are n high-voltage transmission towers T1 to Tn on a high-voltage transmission line. A tower-mounted non-contact high-voltage cable voltage monitoring device, SENSOR1, is installed on the tower of tower T1, SENSOR2 on the tower of tower T2, and similarly, SENSORn on the tower of tower Tn. All devices periodically transmit their monitored line voltage data to the cloud platform, which manages and analyzes the data. If a fault occurs in transmission tower T1, SENSOR1 will collect abnormal voltage data and send it to the cloud platform, which will issue an alarm. Similarly, if a fault occurs in transmission tower T2 or between tower sections T1 and T2, SENSOR2 will collect abnormal voltage data and send it to the cloud platform, which will also issue an alarm, and so on. If the entire transmission line is operating normally, the monitoring devices will send their collected data to the cloud platform, where the platform will statistically analyze and store the data.

[0036] refer to Figure 2 The system hardware configuration of this invention is clearly defined. The energy harvesting unit supplies power to the other units of the entire device. The energy harvesting unit uses solar energy, converting solar energy into electrical energy and storing it when sunlight is available. The electrical energy supplied to the sensor units by the energy harvesting unit requires a clean and stable waveform, necessitating filtering. The sensor units include an electric field sensor and a conditioning circuit. The voltage waveform sensed by the electric field sensor is sent to the conditioning circuit, where it is processed into a voltage waveform of a specific ratio before being provided to the main control unit. The main control unit includes an MCU and a metering chip. It processes the received voltage waveform, converts it into data, packages it, and sends it to the communication module. The protocol adaptation module and 4G communication module of the communication module further process the data packets before transmitting them to the cloud via an antenna. Control commands issued by the cloud platform are received by the communication module, which decodes the 4G signal into command packets and sends them to the main control module. The main control module then responds to the control signals to control other units or sub-modules.

[0037] refer to Figure 3When sunlight is available, the solar panel absorbs light energy and converts it into electrical energy. The MPPT charging control circuit then dynamically adjusts the input impedance to ensure the solar panel operates at its maximum power point (Vmp × Imp), efficiently converting solar energy. Combined with pre-stage filtering, voltage regulation, and backflow prevention circuits, the electrical energy is safely supplied to the downstream DC / DC conversion circuit. Simultaneously, excess electrical energy is used to charge the energy storage battery, which supplies power to the downstream DC / DC conversion circuit in situations of insufficient sunlight or darkness. The DC / DC conversion circuit converts the battery voltage to the operating voltage required by each unit and submodule, providing them with a stable power supply. Due to the specific power supply requirements of the sensor unit, a low-noise LDO is introduced to further process the electrical energy, forming a clean and stable power supply to power the relevant submodules and devices of the sensor unit.

[0038] refer to Figure 4 The upper part is a live circuit with a live conductor at its center. The conductor and the metal cross-section corresponding to the lower induction plate form a capacitor, which is filled with electrons. Changes in the voltage in the live circuit change the movement of electrons between the two plates, thus changing the voltage on the induction plate. The voltage induced by the induction plate is connected to the input of the conditioning circuit. The conditioning circuit transforms the voltage on the induction plate by a certain ratio and changes its phase to match the waveform in the live circuit, thus realizing non-contact measurement of the line voltage.

[0039] refer to Figure 5 A high voltage generator is used to simulate the working conditions of a transmission line tower. A monitoring device is used to monitor the voltage on the line. The sensor unit of the device collects the voltage on the line, and the collected electric field data is handed over to the main control unit for data processing. Then, the communication unit communicates and transmits and receives data with the 4G cloud platform. The monitored data is displayed on the 4G cloud platform. During the process, an external power supply is used to directly power the power source instead of the energy harvesting unit.

[0040] refer to Figure 6 The high-voltage generator outputs 35kV AC power, and the control output switch simulates the normal operation and faults of the circuit. The test results are statistically analyzed and displayed by the device equipped with a 4G cloud platform.

[0041] refer to Figure 7 The test recorded 100 monitoring data points, including 50 instances each of normal and faulty 35kV AC output from the high-voltage generator. The test results were satisfactory. Specifically, the 50 data points recorded during normal output remained largely consistent, with fluctuations less than 0.5%. During faulty output, the monitoring data displayed accurate status assessments with a 100% accuracy rate. These test results demonstrate the stability and reliability of the testing method, validating the effectiveness of the monitoring scheme for the tower-mounted non-contact high-voltage cable voltage monitoring device.

[0042] refer to Figure 8The workflow of this invention includes the following steps:

[0043] S1: The sensor senses changes in the electric field and generates an electrical signal.

[0044] The voltage sensor is the core function of the sensor unit, and its working principle has been fully explained above.

[0045] S2: Electrical signal processing and metrology.

[0046] The conditioning circuit and metering chip process the induced electrical signal. After filtering and amplifying the electrical signal collected by the sensor, the metering chip performs analog-to-digital conversion and metering.

[0047] Specifically, the conditioning circuit of the sensor unit contains an operational amplifier circuit and a filter, which are responsible for amplifying and filtering the tiny electrical signals sensed by the sensor to generate waveform signals that are proportional and in phase with the actual circuit, accurately restoring the changes in electrical signals on the actual circuit. Meanwhile, the metering chip in the main control system can measure and quantify the effective value of voltage, frequency, phase, etc. with high precision. After the electrical signals generated by the sensor unit are converted from analog to digital by the metering chip, digital signals carrying electrical parameter data such as voltage, frequency, and phase are obtained.

[0048] S3: Digital Signal Processing Packaging.

[0049] The MCU of the main control unit reads and processes the quantified voltage signal and electrical parameters, then integrates the effective data from various secondary functional modules (such as temperature, power extraction efficiency, battery power, etc.), and completes data packaging according to the preset communication protocol.

[0050] S4: Select working mode.

[0051] Two checks are performed: power extraction efficiency and battery level. If the current power extraction efficiency is high and the battery level is sufficient, the system enters normal power consumption mode. If the current power extraction efficiency is low or the battery level is insufficient, the system enters low power consumption mode.

[0052] Specifically, the multi-channel ADCs in the main control module collect information such as the voltage of the solar photovoltaic panels and the voltage of the energy storage batteries in the power supply unit, and send them to the MCU for judgment. If the voltage of the solar photovoltaic panels is greater than 8V, it is determined that the current sunlight is sufficient and the power extraction efficiency is high; if the battery voltage is greater than 3.9V, it is determined that the battery power is sufficient. Based on the two judgments, the MCU will control the frequency of data packet transmission. In normal mode, data packets are sent to the communication module every 30 seconds, while in low-power mode, the MCU will send data packets to the communication module every 5 minutes. By controlling the transmission frequency, the power consumption of the main control unit and the communication unit can be significantly reduced, keeping the device powered on and operating.

[0053] S5: Issue the send command.

[0054] The main control module issues a send command to the communication module and sends the data packet to the communication module; in another possible scenario, the personnel actively issue the command on the cloud platform. The command is transmitted via a 4G signal emitted by the cloud platform, received and parsed by the communication module, and then sent to the MCU of the main control module. After responding to the command, the MCU actively issues a send command and sends the data packet to the communication module.

[0055] S6: The communication module sends data.

[0056] After receiving the transmission command, the communication module sends the data packet to the protocol adaptation module. After editing the data according to the 4G network transmission format, the 4G communication module sends the data packet to the server through the antenna.

[0057] S7: The cloud platform receives and judges the data.

[0058] The cloud platform on the server receives and unpacks the data, analyzes and judges the collected line electrical parameters. If the voltage value deviates from the calibration value by more than 90% or the frequency deviates from 50Hz by more than 2%, a fault alarm is issued to notify the staff to handle it. If there is no fault, the data is saved on the server with timestamps for easy viewing later.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tower-mounted non-contact high-voltage cable voltage monitoring device, characterized in that, Includes tower, sensor unit, energy harvesting unit, energy storage battery, main control unit, communication unit, heightening pole assembly and mounting structure; The tower surface is provided with a tower crossarm, the heightening pole assembly is fixed to the tower crossarm by a mounting structure, the sensor unit is fixed to the top of the heightening pole assembly, and the energy harvesting unit, energy storage battery, main control unit and communication unit are integrated into a waterproof functional box, which is fixed to the tower crossarm by a mounting structure.

2. The tower-mounted non-contact high-voltage cable voltage monitoring device according to claim 1, characterized in that, The sensor unit includes a sensing electrode plate, a conditioning circuit, and a rainproof housing. The sensor unit is used to sense the electric field signal of the high-voltage cable, and after processing by the conditioning circuit, it outputs an analog voltage signal that is proportional and in phase with the cable voltage. The rainproof outer shell is mushroom-shaped and coated with a hydrophobic layer to prevent rainwater and condensation from forming on the surface.

3. The tower-mounted non-contact high-voltage cable voltage monitoring device according to claim 1, characterized in that, The energy harvesting unit includes a solar photovoltaic panel, an MPPT charging module, and an energy storage battery, which can continuously supply energy to the device under various lighting conditions.

4. The tower-mounted non-contact high-voltage cable voltage monitoring device according to claim 1, characterized in that, The main control unit includes an MCU minimum system, a metering module, and various sensor components. The MCU minimum system serves as the functional core of the device, controlling the entire system and other units and sub-modules.

5. The tower-mounted non-contact high-voltage cable voltage monitoring device according to claim 1, characterized in that, The communication unit includes a protocol adaptation module, a 4G communication module, and an antenna. Each sub-module works together to be responsible for communication and data exchange between the device system and the server in a 4G manner.

6. The tower-mounted non-contact high-voltage cable voltage monitoring device according to claim 1, characterized in that, The height-increasing rod assembly uses a fiberglass insulated rod, with a single section length of 1m, which can be combined to form sections of 1 to 3m. The installation structure includes 304 stainless steel clamps and functional box fixing brackets to ensure the stability of the installation.

7. The tower-mounted non-contact high-voltage cable voltage monitoring device according to claim 1, characterized in that, The waterproof housing is made of ABS+PC alloy material, with an operating temperature range of -40 to 85℃, and is equipped with a solar photovoltaic panel on the top.

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