Lightning arrester digital leakage ammeter

Abstract

The invention discloses a digitalized leakage ammeter for a lightning arrester. The digitalized leakage ammeter comprises a shell; the signal acquisition unit, the temperature and humidity sensor, the display unit, the communication unit and the alarm unit are connected with the controller, the controller can receive, process and store acquired data, and meanwhile, data analysis is carried out according to a preset algorithm to judge the working state of the lightning arrester; and the monitoring data is displayed through the display unit and sent to a remote device through the communication unit, an alarm signal is sent out when the monitoring data is abnormal or equipment fails, and alarm information is uploaded in real time. By implementing the system, various data can be monitored, real-time remote transmission and intelligent analysis of the data can be realized, and the system is simple and convenient to install, good in protection performance and high in data accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply equipment, and particularly to a digital leakage ammeter for lightning arresters. Background Art

[0002] The construction of intelligent substations is an important part of the State Grid Corporation's construction of a modern equipment management system, an important measure to improve the intelligent level of equipment and the quality and efficiency of substation operation and maintenance, and an important foundation for the digital transformation of the substation specialty. At present, in the process of promoting the construction of intelligent substations, four new technologies and applications, namely digital remote transmission meters, one-key sequential control of operations, comprehensive main and auxiliary monitoring, and remote intelligent inspection, are relatively mature and particularly recognized by the grass-roots level. Digital remote transmission meters are one of them. From the perspective of operation and maintenance performance, the work of manually copying meter readings on-site is a cumbersome, inefficient, and repetitive labor. Through digital remote transmission, digital acquisition and remote transmission of the instrument data of all main equipment in the substation will be realized, which will greatly reduce the daily operation and maintenance workload, effectively reduce the work intensity of operation and maintenance personnel, and significantly improve the operation and maintenance performance. From the perspective of operation and maintenance lean management, continuous monitoring of equipment can be realized, trend perception and sudden change monitoring of data can be achieved, which is conducive to lean operation and maintenance of equipment and will more effectively ensure equipment safety.

[0003] However, existing lightning arrester monitoring devices often have a single function, can only provide basic current monitoring functions, and have backward data transmission methods, making it difficult to achieve real-time remote transmission and intelligent analysis of data. In addition, there are many inconveniences in the installation, maintenance, and use of these devices, such as complex installation, susceptibility to environmental factors, and insufficient data accuracy. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a digital leakage ammeter for lightning arresters, which can monitor various data, can realize real-time remote transmission and intelligent analysis of data, and has simple installation, good protection performance, and high data accuracy.

[0005] To solve the above technical problems, the present invention provides a digital leakage ammeter for lightning arresters, which includes a housing, a controller disposed in the housing, and a signal acquisition unit, a temperature and humidity sensor, a display unit, a communication unit, and an alarm unit respectively connected to the controller, wherein:

[0006] The housing is used for encapsulating and protecting internal components, has a waterproof and dustproof design, and its panel is inclined towards the ground during installation;

[0007] The signal acquisition unit is connected between the zinc oxide lightning arrester and the busbar, and is used for real-time acquisition of the voltage signal of the busbar and the leakage current signal of the lightning arrester;

[0008] The temperature and humidity sensor is disposed near the lightning arrester and is used for collecting the external environmental temperature and humidity at the installation position of the lightning arrester;

[0009] A controller, which is used to receive, process and store the data collected by the signal acquisition unit and the temperature and humidity sensor, and at the same time perform data analysis according to a preset algorithm to judge the working state of the lightning arrester;

[0010] A display unit, which is arranged on the outer shell panel and is used to display the processed monitoring data, including voltage, leakage current, ambient temperature and humidity information;

[0011] A communication unit, which includes a Bluetooth unit and a LoRa wireless communication unit, and is used to locally transmit the monitoring data to the monitor or remotely upload it to the in-station aggregation node device through the LoRa network;

[0012] An alarm unit, which is used to emit an alarm signal when the monitoring data is abnormal or the device fails, and upload the alarm information in real time.

[0013] Preferably, the following are arranged on the outer shell:

[0014] A metal base, which is fixed to the bottom of the outer shell, is connected to the metal bracket of the lightning arrester through M10 screws, and serves as a part of the grounding bus;

[0015] An insulator, which is fixed inside the outer shell, is made of ceramic or silica gel, and has good insulation performance and high temperature resistance;

[0016] An electrode, which extends out through the top of the insulator and is connected to the low-voltage end of the lightning arrester.

[0017] Preferably, the signal acquisition unit includes:

[0018] An opening and closing current sensor, which is used to accurately measure the leakage current of the lightning arrester, and the sensor has high precision and stability;

[0019] A voltage sensor, which is used to collect the voltage of the busbar;

[0020] Wherein, the opening and closing current sensor and the voltage sensor are both connected by a shielded cable to reduce electromagnetic interference.

[0021] Preferably, the controller is built-in with a data storage unit, which is used to store the monitoring data for a long time, and the data is exported through a USB interface or a wireless communication method.

[0022] Preferably, the display unit is a liquid crystal display screen with a backlight function.

[0023] Preferably, the alarm unit includes a sound alarm and a light alarm. When the monitoring data is abnormal or the device fails, sound and light alarm signals are emitted simultaneously to remind the staff to pay attention.

[0024] Preferably, the outer shell is made of metal material and its surface is coated with an anti-corrosion coating.

[0025] Preferably, it further includes a power management unit, which is used to provide stable working power for each component and has overvoltage, overcurrent, and short-circuit protection functions to ensure the safe operation of the device.

[0026] Preferably, the controller is built-in with a self-check unit, which is used to regularly detect the working status of each component, automatically trigger the alarm unit when abnormalities are found, and attempt to perform fault recovery or switch to standby components.

[0027] Preferably, it supports remote configuration and upgrade functions. It receives configuration instructions and upgrade packages from a remote server through the LoRa wireless communication unit to achieve remote adjustment of device parameters and update of software versions.

[0028] Implementing the embodiments of the present invention has the following beneficial effects:

[0029] The present invention can simultaneously monitor multiple key parameters such as the leakage current, ambient temperature, and humidity of the lightning arrester, providing strong support for comprehensively evaluating the working status of the lightning arrester. Through the built-in Bluetooth unit and LoRa wireless communication unit, the present invention can locally transmit the monitoring data to the monitor in real time or remotely upload it to the in-station aggregation node device through the LoRa network, realizing real-time data sharing and remote monitoring.

[0030] The installation method of the present invention is the same as that of traditional electromechanical leakage current monitoring devices, which is convenient to install and maintenance-free. At the same time, the design of the metal base and insulator also improves the stability and reliability of the device.

[0031] The built-in controller of the present invention can process and analyze the collected data according to a preset algorithm, judge the working status of the lightning arrester, and send out an alarm signal in time when the monitoring data is abnormal or the device fails, improving the intelligent level and safety of the device. And the data storage unit built in the controller can store the monitoring data for a long time, facilitating subsequent data analysis and fault troubleshooting. At the same time, the data can be exported through the USB interface or wireless communication method, facilitating further processing and application of the data.

[0032] The implementation of the present invention can greatly reduce the daily operation and maintenance workload, reduce the work intensity of operation and maintenance personnel, and improve the operation and inspection performance. At the same time, the continuous monitoring of the device and the trend perception function of the data are also beneficial to the lean operation and maintenance and fault prevention of the device.

[0033] In summary, the digital leakage current meter of the lightning arrester provided by the present invention realizes real-time monitoring, data processing, storage, display, and alarm of the leakage current and ambient temperature of the lightning arrester, as well as long-distance uploading of data through precise structural design and functional unitization, providing strong technical support for the construction of smart substations. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present invention.

[0035] Figure 1 Schematic diagram of the functional structure of a digital leakage ammeter for lightning arresters provided by the present invention;

[0036] Figure 2 Front view of a digital leakage ammeter for lightning arresters provided by the present invention;

[0037] Figure 3 For Figure 2 Left view of the digital leakage ammeter for lightning arresters in

[0038] Figure 4 Schematic diagram of the installation of the digital leakage ammeter for lightning arresters provided by the present invention on a lightning arrester. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the present invention in detail with reference to the drawings.

[0040] As Figure 1 shown, a schematic diagram of the structure of the functional modules of an embodiment of a digital leakage ammeter for lightning arresters provided by the present invention is shown; in combination with Figures 2 to 4 shown, in this embodiment, the digital leakage ammeter for lightning arresters includes: a housing 1, a controller 2 provided in the housing, and a signal acquisition unit 3, a temperature and humidity sensor 4, a display unit 5, a communication unit 6, an alarm unit 7, and a power management unit 8 respectively connected to the controller 2, where:

[0041] The housing 1 is used to encapsulate and protect the internal components, has a waterproof and dustproof design, and its panel is inclined towards the ground during installation; the housing is made of a metal material, has good heat dissipation performance and electromagnetic interference resistance, and its surface is coated with an anti-corrosion coating to extend the service life of the device.

[0042] In a specific example, the following are provided on the housing 1:

[0043] A metal base 10 is fixed to the bottom of the housing, connected to the metal bracket of the lightning arrester 9 through M10 screws, and serves as part of the grounding bus; the lightning arrester 9 can be, for example, a zinc oxide lightning arrester;

[0044] An insulator (not shown), fixed inside the housing, is made of ceramic or silica gel, having good insulation performance and high temperature resistance;

[0045] The electrode 11 extends through the top of the insulator and is connected to the low-voltage end of the lightning arrester.

[0046] The signal acquisition unit 3 is connected between the zinc oxide lightning arrester and the busbar, and is used for real-time acquisition of the voltage signal of the busbar and the leakage current signal of the lightning arrester;

[0047] In a specific example, the signal acquisition unit 3 includes:

[0048] An open-close type current sensor, used for accurately measuring the leakage current of the lightning arrester, and this sensor has high precision and stability;

[0049] A voltage sensor, used for acquiring the voltage of the busbar;

[0050] Wherein, both the open-close type current sensor and the voltage sensor are connected by a shielded cable to reduce electromagnetic interference.

[0051] The temperature and humidity sensor 4 is arranged near the lightning arrester, and is used for acquiring the external environment temperature and humidity of the installation position of the lightning arrester;

[0052] The controller 2 is used for receiving, processing and storing the data acquired by the signal acquisition unit 3 and the temperature and humidity sensor 4, and at the same time performing data analysis according to a preset algorithm to judge the working state of the lightning arrester;

[0053] At the same time, a data storage unit is built in the controller 2 for long-term storage of the monitoring data, and the data is exported through a USB interface or a wireless communication method. A self-check unit is also arranged in the controller 2 for regularly detecting the working state of each component. When an abnormality is found, the alarm unit is automatically triggered, and an attempt is made to perform fault recovery or switch to a standby component.

[0054] The display unit 5 is arranged on the housing panel and is connected to the controller, and is used for displaying the processed monitoring data, including voltage, leakage current, environmental temperature and humidity information; specifically, the display unit 5 is a liquid crystal display screen, having a backlight function and can clearly display the monitoring data under different lighting conditions;

[0055] The communication unit 6 includes a Bluetooth unit and a LoRa wireless communication unit, both of which are connected to the controller, and are used for locally transmitting the monitoring data to the monitor through the Bluetooth unit. Therefore, in an actual example, the monitoring data can be displayed on the monitor of the monitor, which can improve the inspection quality and efficiency of the staff;

[0056] Similarly, the monitoring data can also be remotely uploaded to the in-station aggregation node device through the LoRa wireless communication unit using the LoRa network (for example, the data can be reported once every 5 minutes); through this communication unit 6, the present invention supports remote configuration and upgrade functions. The configuration instructions and upgrade packages from the remote server are received through the LoRa wireless communication unit to achieve remote adjustment of device parameters and update of software versions; it can be understood that the LoRa communication of the present invention complies with the "Q / GDW 12020-2019 Communication Protocol for Micro-power Wireless Networks in the Internet of Things for Power Transmission and Transformation Equipment" and can be directly connected to the perception layer of the power transmission and transformation Internet of Things without other configurations.

[0057] An alarm unit 7, connected to the controller, is used to send an alarm signal when the monitoring data is abnormal or the device fails, and upload the alarm information in real time; specifically, the alarm unit 7 includes a sound alarm and a light alarm. When the monitoring data is abnormal or the device fails, sound and light alarm signals are sent simultaneously to remind the staff to pay attention.

[0058] A power management unit 8 is used to provide a stable working power supply for each component and has overvoltage, overcurrent, and short-circuit protection functions to ensure the safe operation of the device.

[0059] It can be understood that the digital leakage current meter for lightning arresters provided by the present invention is a device for

[0060] a zinc oxide lightning arrester leakage current periodic monitoring device, which has functions such as long-period and daily patrol monitoring of single-phase and three-phase total leakage currents and ambient temperature, can store locally and realize Bluetooth transmission to the monitor, and realizes comprehensive algorithm analysis of the operating state of the lightning arrester to improve the quality and efficiency of patrol inspection.

[0061] When installing the device, the inclination angle between the plane where the monitoring device panel is located and the horizontal plane should be less than 85° to avoid water accumulation affecting observation. At the same time, it can ensure that the observer has a good liquid crystal viewing angle when observing on the ground. Fix the metal shell base on the metal bracket with M10 screws and ground it through the grounding busbar (the monitoring device base can also be used as the grounding busbar). The other end leads out the electrode through the top of the insulator and is connected to the low-voltage end of the lightning arrester with a wire (or aluminum strip). Be sure to install firmly and make reliable contact.

[0062] Implementing the embodiments of the present invention has the following beneficial effects:

[0063] The present invention can simultaneously monitor multiple key parameters such as the leakage current, ambient temperature, and humidity of the lightning arrester, providing strong support for comprehensively evaluating the working state of the lightning arrester. Through the built-in Bluetooth unit and LoRa wireless communication unit, the present invention can locally transmit the monitoring data to the monitor in real time or remotely upload it to the in-station aggregation node device through the LoRa network, realizing real-time data sharing and remote monitoring.

[0064] The installation method of the present invention is the same as that of traditional electromechanical leakage current monitoring devices, which is convenient to install and maintenance-free. At the same time, the design of the metal base and insulator also improves the stability and reliability of the device.

[0065] The built-in controller of the present invention can process and analyze the collected data according to a preset algorithm, judge the working state of the lightning arrester, and send out an alarm signal in time when the monitoring data is abnormal or the device fails, improving the intelligent level and safety of the device. Moreover, the data storage unit built in the controller can store the monitoring data for a long time, which is convenient for subsequent data analysis and fault troubleshooting. At the same time, the data can be exported through the USB interface or wireless communication method, facilitating further processing and application of the data.

[0066] The implementation of the present invention can greatly reduce the daily operation and maintenance workload, reduce the work intensity of operation and maintenance personnel, and improve the operation and inspection performance. At the same time, the continuous monitoring function of the device and the trend perception function of the data are also conducive to the lean operation and maintenance of the device and the prevention of faults.

[0067] In summary, the digital leakage current meter for lightning arresters provided by the present invention realizes the real-time monitoring, data processing, storage, display and alarm of the leakage current and ambient temperature of the lightning arrester, as well as the long-distance upload of data through precise structural design and functional unitization, providing strong technical support for the construction of smart substations.

[0068] Those skilled in the art should understand that the embodiments of the present invention can be provided as methods, devices, or computer program products. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0069] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and the combination of processes and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0070] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made in accordance with the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A digital leakage ammeter for lightning arresters, characterized in that, Comprising: A housing, a controller disposed within the housing, and a signal acquisition unit, a temperature and humidity sensor, a display unit, a communication unit, and an alarm unit respectively connected to the controller, wherein: The housing is used for encapsulating and protecting internal components, has a waterproof and dustproof design, and its panel is inclined towards the ground during installation; The signal acquisition unit is connected between the zinc oxide arrester and the busbar, and is used for real-time acquisition of the busbar voltage signal and the leakage current signal of the arrester; The temperature and humidity sensor is disposed near the arrester and is used for acquiring the external environment temperature and humidity at the installation position of the arrester; The controller is used for receiving, processing, and storing the data acquired by the signal acquisition unit and the temperature and humidity sensor, and simultaneously performing data analysis according to a preset algorithm to judge the working state of the arrester; The display unit is disposed on the housing panel and is used for displaying the processed monitoring data, including voltage, leakage current, environmental temperature, and humidity information; The communication unit includes a Bluetooth unit and a LoRa wireless communication unit, and is used for locally transmitting the monitoring data to the monitor or remotely uploading it to the in-station aggregation node device through the LoRa network; The alarm unit is used for emitting an alarm signal when the monitoring data is abnormal or the device fails, and uploading the alarm information in real time.

2. The digital leakage ammeter for arrester according to claim 1, characterized in that, On the housing, there are provided: A metal base, fixed to the bottom of the housing, connected to the metal bracket of the arrester through M10 screws, and serving as a part of the grounding busbar; An insulator, fixed inside the housing, made of ceramic or silicone material, having good insulation performance and high temperature resistance; An electrode, extending out through the top of the insulator and connected to the low-voltage end of the arrester.

3. The digital leakage ammeter for lightning arrester according to claim 2, wherein, The signal acquisition unit includes: An opening and closing current sensor, used for accurately measuring the leakage current of the arrester, and the sensor has high precision and stability; A voltage sensor, used for acquiring the voltage of the busbar; Wherein, the opening and closing current sensor and the voltage sensor are both connected through a shielded cable to reduce electromagnetic interference.

4. The digital leakage ammeter for arrester according to claim 3, characterized in that, The controller is built-in with a data storage unit for long-term preservation of the monitoring data, and the data is exported through a USB interface or a wireless communication method.

5. The digital leakage ammeter for arrester according to claim 4, characterized in that, The display unit is a liquid crystal display screen with a backlight function.

6. The digital leakage ammeter for arrester according to claim 5, characterized in that, The alarm unit includes a sound alarm and a light alarm. When the monitoring data is abnormal or the device fails, sound and light alarm signals are simultaneously emitted to remind the staff to pay attention.

7. The digital leakage ammeter for lightning arrester according to claim 6, characterized in that, The housing is made of metal material, and its surface is coated with an anti-corrosion coating.

8. The digital leakage ammeter for arrester according to claim 7, characterized in that, It further includes a power management unit, used for providing a stable working power supply for each component, and having overvoltage, overcurrent, and short-circuit protection functions to ensure the safe operation of the device.

9. The digital leakage ammeter for arrester according to claim 8, wherein The controller is built-in with a self-check unit for regularly detecting the working state of each component. When an abnormality is found, the alarm unit is automatically triggered, and a fault recovery is triggered or switched to a standby component.

10. The digital leakage ammeter for lightning arrester according to any one of claims 1 to 9, characterized in that It supports remote configuration and upgrade functions, receives configuration instructions and upgrade packages from a remote server through the LoRa wireless communication unit, and realizes remote adjustment of device parameters and update of software versions.

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