An ultra-low power consumption high-voltage cable sheath circulating current monitoring device
By designing an ultra-low power high-voltage cable sheath circulating current monitoring device, which utilizes lithium battery power and a low-power control unit, the problem of inadequate monitoring in complex environments by existing monitoring methods is solved, and wireless real-time monitoring and efficient cable status acquisition are realized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG SHENGHE ELECTRONICS CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-09
AI Technical Summary
Existing methods for monitoring the circulating current of high-voltage cable sheaths have drawbacks: manual monitoring cannot obtain real-time status values, and online monitoring requires external power supply, leading to inadequate monitoring in complex environments.
Design an ultra-low power high voltage cable sheath circulating current monitoring device, including a data acquisition unit, a power supply unit, a main control unit, a low power control unit, and a wireless transmission unit. It is powered by a lithium battery and controls the power supply switches of each unit through the low power control unit to achieve wireless transmission and low power operation.
Real-time monitoring without external power supply was achieved in complex environments, avoiding omissions in manual monitoring and improving the monitoring effect and continuity of high-voltage cable sheath circulation current.
Smart Images
Figure CN224342972U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of high-voltage cable monitoring technology, and in particular relates to an ultra-low power high-voltage cable sheath circulating current monitoring device. Background Technology
[0002] High-voltage cable sheath circulation current monitoring is currently an important indicator in cable operation and maintenance monitoring and is frequently used in the cable operation and maintenance testing process. At present, the testing methods are mostly manual monitoring and online monitoring.
[0003] In existing technologies, manual monitoring requires regular manual inspections to improve cable maintenance efficiency. However, manual inspection cannot obtain real-time status values of grounding cables, leading to situations where cable faults are not detected in time during downtime. Online monitoring, on the other hand, mainly uses external power supply to ensure real-time monitoring of sheath current values, thereby achieving the purpose of real-time monitoring. Of course, these two detection methods may be selected individually or used in combination depending on different needs.
[0004] However, due to the complex installation and operation environment of cables, manual monitoring and external power supply and wiring are not possible in many places. This makes it impossible to monitor and obtain the sheath current through existing manual and online monitoring methods. Therefore, there is a need for a current monitoring device that does not require external power supply and can meet the requirements of wireless communication, so as to meet the requirements of high-voltage cable sheath environment monitoring device in various complex environments. Utility Model Content
[0005] This invention provides an ultra-low power consumption high voltage cable sheath circulating current monitoring device, which aims to solve the above-mentioned technical problems.
[0006] This invention is implemented as follows: This invention provides an ultra-low power high voltage cable sheath circulating current monitoring device, including a data acquisition unit, a power supply unit, a main control unit, a low power control unit, and a wireless transmission unit.
[0007] The power supply unit is electrically connected to the acquisition unit, the main control unit and the wireless transmission unit respectively, and the power supply unit supplies power to the acquisition unit, the main control unit and the wireless transmission unit;
[0008] The acquisition unit is communicatively connected to the main control unit. The acquisition unit is used to acquire the current signal of the circulating current in the sheath of the high-voltage cable and send it to the main control unit, which processes and summarizes the current signal.
[0009] The main control unit is communicatively connected to the wireless transmission unit, and is used to wirelessly transmit and communicate the processed data with the external monitoring platform through the wireless transmission unit.
[0010] The low-power control unit is connected to the acquisition unit, the main control unit, and the wireless transmission unit respectively, and is used to control the power supply switches of the acquisition unit, the main control unit, and the wireless transmission unit.
[0011] Furthermore, the acquisition unit includes a current transformer and an MCP6002T-I / SN operational amplifier chip. The current transformer is used to acquire the current signal of the circulating current in the sheath of the high-voltage cable, and the MCP6002T-I / SN operational amplifier chip is used to acquire and process the current signal.
[0012] Furthermore, the power supply unit includes a 3.7V lithium battery.
[0013] Furthermore, the main control unit includes an MCU chip.
[0014] Furthermore, the wireless transmission unit includes a wireless module A39C-T400A22D1a.
[0015] Furthermore, the low-power control unit includes a control switch circuit composed of an N-channel MOSFET 2N7002 and a P-channel MOSFET SI2301, which controls the power supply switching of the acquisition unit, the main control unit, and the wireless transmission unit by controlling the switching of high and low levels.
[0016] Furthermore, the N-channel MOSFET 2N7002 is connected in parallel with a capacitor C22 and a resistor R13, and the P-channel MOSFET SI2301 is connected in parallel with a resistor R12.
[0017] This utility model provides an ultra-low power high-voltage cable sheath circulating current monitoring device, comprising a data acquisition unit, a power supply unit, a main control unit, a low-power control unit, and a wireless transmission unit. The power supply unit is electrically connected to the data acquisition unit, the main control unit, and the wireless transmission unit, providing power to these units. The data acquisition unit is communicatively connected to the main control unit, acquiring current signals of the high-voltage cable sheath circulating current and transmitting them to the main control unit, which processes and summarizes the current signals. The main control unit is communicatively connected to the wireless transmission unit, transmitting the processed data to it. The wireless transmission unit communicates wirelessly with an external monitoring platform via a LoRa wireless communication antenna. The power consumption control unit is connected to the data acquisition unit, the main control unit, and the wireless transmission unit, controlling their power supply switches. The ultra-low power consumption high-voltage cable sheath circulating current monitoring device provided in this application controls the power supply switches of other units through the power consumption control unit, thereby achieving low power consumption operation of each unit and thus low power consumption operation of the entire monitoring device. On the one hand, it can effectively address the situation where online monitoring devices cannot be stably powered in complex environments, resulting in inadequate online monitoring. On the other hand, it can also effectively solve the problem of omissions in manual monitoring, and can greatly improve the monitoring purpose of high-voltage cable sheath circulating current. Attached Figure Description
[0018] Figure 1 This is a structural principle block diagram of the ultra-low power high voltage cable sheath circulating current monitoring device provided by this utility model.
[0019] Figure 2 This is a hardware schematic diagram of the wireless transmission unit in this utility model embodiment.
[0020] Figure 3 This is a hardware schematic diagram of the low-power control unit in this utility model example.
[0021] The numbers in the diagram represent: 1-current transformer, 2-Lora wireless communication antenna. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0023] See Figures 1-3This utility model provides an ultra-low power high-voltage cable sheath circulating current monitoring device, which includes a data acquisition unit, a power supply unit, a main control unit, a low-power control unit, and a wireless transmission unit. The power supply unit is electrically connected to the data acquisition unit, the main control unit, and the wireless transmission unit. The data acquisition unit is communicatively connected to the main control unit, and the main control unit is communicatively connected to the wireless transmission unit. The low-power control unit is connected to the data acquisition unit, the main control unit, and the wireless transmission unit. In specific implementation, the power supply unit provides power to the data acquisition unit, the main control unit, and the wireless transmission unit. The data acquisition unit collects the current signal of the high-voltage cable sheath circulating current and sends it to the main control unit, which processes and summarizes the current signal. Then, the main control unit sends the processed data to the wireless transmission unit, which enables wireless communication with an external monitoring platform, allowing the external monitoring platform to further monitor and process the relevant data. In practice, the low-power control unit is used to control the power supply switches of the acquisition unit, the main control unit, and the wireless transmission unit, thereby achieving low-power control of the acquisition unit, the main control unit, and the wireless transmission unit, so as to achieve low-power operation of the monitoring device, thereby improving the daily operating time and operating effect of the monitoring device.
[0024] Moreover, in the specific implementation process, since the low power control unit can effectively reduce the power consumption of the acquisition unit, main control unit and wireless transmission unit, on the one hand, it can effectively solve the problem of unstable power supply to the online monitoring device in the current complex environment, which leads to inadequate online monitoring, and on the other hand, it can effectively solve the problem of omissions in manual monitoring, which can greatly improve the monitoring purpose of high voltage cable sheath circulation current.
[0025] See Figure 1 As shown, in the specific implementation process, the acquisition unit includes a current transformer 1 and an MCP6002T-I / SN operational amplifier chip. The current transformer 1 is installed on the high-voltage cable and is used to acquire the current signal of the circulating current in the sheath of the high-voltage cable. The main function of the MCP6002T-I / SN operational amplifier chip is to acquire the current signal of the current transformer 1 and then process the current signal, such as converting the acquired analog current signal into a digital signal, so as to facilitate the transmission of the processed current data to the main control unit for further processing.
[0026] In practice, the main control unit may include an MCU chip, which can be a GD32F103RET6 MCU, thereby effectively improving the processing efficiency of current data. The power supply unit may include a 3.7V lithium battery, which can power the MCU chip, operational amplifier chip, and wireless transmission unit respectively.
[0027] refer to Figure 2 The diagram shown is a hardware schematic of the wireless transmission unit provided in an embodiment of this application. Figure 1 and 2 As shown, the wireless transmission unit may include a wireless module and a Lora wireless communication antenna 2. The wireless module has both transmitting and receiving functions, and both can be A39C-T400A22D1a wireless modules. This A39C-T400A22D1a wireless module, along with capacitor C21 (0.1uF / 50V), constitutes the wireless transmission unit. The wireless module uses the Lora wireless communication protocol for communication, and the Lora wireless communication antenna 2 uploads the data to an external monitoring platform. In specific implementation, this wireless transmission unit can establish a relay to achieve long-distance transmission. Furthermore, CRC redundancy check and MD5 encryption algorithms are used during data transmission to ensure data validity and security.
[0028] In practical implementation, the low-power control unit includes a control switch circuit composed of an N-channel MOSFET 2N7002 and a P-channel MOSFET SI2301. This circuit controls the power supply to the acquisition unit, main control unit, and wireless transmission unit by switching between high and low power levels. Specifically, as shown... Figure 3 As shown, the N-channel MOSFET 2N7002 is connected in parallel with capacitor C22 (0.1uF / 50V) and resistor R13 (4.7KΩ) to form an N-channel MOSFET circuit. The P-channel MOSFET SI2301 is connected in parallel with resistor R12 (4.7KΩ) to form a P-channel MOSFET circuit. These two circuits, along with resistor R11 (1KΩ), constitute the entire low-power control circuit. The input of this low-power control circuit is connected to the power supply, and the output is connected to the load, as described in this application. The system integrates a data acquisition unit, a main control unit, and a wireless transmission unit. By controlling the switching of high and low levels, it switches the power supply to these units. A high level enables conduction, thus achieving low-power power supply for the data acquisition unit, main control unit, and wireless transmission unit. This effectively ensures ultra-low power operation of the entire monitoring device and allows for wireless transmission without external power supply, thanks to the lithium battery power supply and the wireless transmission unit. This makes it suitable for use in high-voltage cable sheath environmental monitoring devices in various complex environments.
[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for monitoring circulating current in the sheath of ultra-low power high-voltage cables, characterized in that, It includes a data acquisition unit, a power supply unit, a main control unit, a low-power control unit, and a wireless transmission unit; The power supply unit is electrically connected to the acquisition unit, the main control unit and the wireless transmission unit respectively, and the power supply unit supplies power to the acquisition unit, the main control unit and the wireless transmission unit; The acquisition unit is communicatively connected to the main control unit. The acquisition unit is used to acquire the current signal of the circulating current in the sheath of the high-voltage cable and send it to the main control unit, which processes and summarizes the current signal. The main control unit is communicatively connected to the wireless transmission unit, and is used to wirelessly transmit and communicate the processed data with the external monitoring platform through the wireless transmission unit. The low-power control unit is connected to the acquisition unit, the main control unit, and the wireless transmission unit respectively, and is used to control the power supply switches of the acquisition unit, the main control unit, and the wireless transmission unit.
2. The ultra-low power high-voltage cable sheath circulating current monitoring device according to claim 1, characterized in that, The acquisition unit includes a current transformer and an MCP6002T-I / SN operational amplifier chip. The current transformer is used to acquire the current signal of the circulating current in the sheath of the high-voltage cable, and the MCP6002T-I / SN operational amplifier chip is used to acquire and process the current signal.
3. The ultra-low power high-voltage cable sheath circulating current monitoring device according to claim 1, characterized in that, The power supply unit includes a 3.7V lithium battery.
4. The ultra-low power high-voltage cable sheath circulating current monitoring device according to claim 1, characterized in that, The main control unit includes an MCU chip.
5. The ultra-low power high-voltage cable sheath circulating current monitoring device according to claim 1, characterized in that, The wireless transmission unit includes a wireless module A39C-T400A22D1a.
6. The ultra-low power high-voltage cable sheath circulating current monitoring device according to claim 1, characterized in that, The low-power control unit includes a control switch circuit composed of an N-channel MOSFET 2N7002 and a P-channel MOSFET SI2301, which controls the power supply switching of the acquisition unit, the main control unit, and the wireless transmission unit by controlling the switching of high and low levels.
7. The ultra-low power high-voltage cable sheath circulating current monitoring device according to claim 6, characterized in that, The N-channel MOSFET 2N7002 is connected in parallel with a capacitor C22 and a resistor R13, and the P-channel MOSFET SI2301 is connected in parallel with a resistor R12.