CN213986651U - Multi-state online monitoring system for lightning arrester - Google Patents

Multi-state online monitoring system for lightning arrester Download PDF

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Publication number
CN213986651U
CN213986651U CN202022387741.3U CN202022387741U CN213986651U CN 213986651 U CN213986651 U CN 213986651U CN 202022387741 U CN202022387741 U CN 202022387741U CN 213986651 U CN213986651 U CN 213986651U
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Prior art keywords
lightning arrester
data
arrester
unit
current
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CN202022387741.3U
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Inventor
鲁储伟
杜春忠
瞿佳
曾荣俊
李源
杜百祥
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Huaneng Tibet Yaluzangbu River Water Power Development Investment Co ltd
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Huaneng Tibet Yaluzangbu River Water Power Development Investment Co ltd
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Abstract

The utility model discloses a lightning arrester multi-state on-line monitoring system, which comprises a computer monitoring unit, a data collecting unit and a data collecting unit arranged on the lightning arrester, wherein the data collecting unit comprises a voltage collecting device, a leakage current collecting device, a pollution current collecting device, an infrared temperature measuring and imaging device and a base insulation resistance collecting device; the computer monitoring unit processes and analyzes parameters such as leakage resistive current of the lightning arrester, harmonic wave of fundamental current, foul current, base insulation resistance, appearance of the lightning arrester, infrared temperature measurement of the lightning arrester and the like, pre-judges or discovers internal and external faults of the lightning arrester in advance, facilitates maintenance personnel to arrange a maintenance plan in advance, reduces the influence on stable operation of a power system, and improves the reliable operation efficiency of power production equipment.

Description

Multi-state online monitoring system for lightning arrester
Technical Field
The utility model relates to a lightning arrester on-line monitoring technical field especially relates to a lightning-arrest multistation on-line monitoring system.
Background
The metal oxide arrester is an important primary device in power production, can protect the insulation of alternating current power transmission and transformation equipment, can prevent the power equipment from being damaged by lightning overvoltage or system surge overvoltage, and is widely used for overvoltage protection of power equipment such as transformers and power transmission lines. The lightning arrester on-line monitoring device is a high-voltage electrical appliance for monitoring the action of the lightning arrester, and is widely applicable to various metal oxide lightning arresters in an alternating-current power grid, the initial continuous current, the current continuous current and the action times of the lightning arrester can be monitored on line, and meanwhile, a wireless and wired communication module is adopted to upload monitoring parameters to a background workstation, so that the real-time continuous current and the initial working current of the lightning arrester can be conveniently observed and compared on site, the internal aging, the dampness and other abnormalities of the lightning arrester can be effectively and automatically detected, the remote on-line monitoring of the running parameters of the lightning arrester and the early fault diagnosis of the running state of the lightning arrester can be realized, and the fault running of the lightning arrester can be avoided. The existing online monitoring device for the lightning arrester mainly collects data such as leakage resistive current, fundamental wave current harmonic wave, lightning arrester in-phase standard voltage, pollution current and the like for processing and analyzing, so that the trend of the internal wetting or nonlinear resistance aging development of the lightning arrester is judged, and a maintenance work plan is conveniently arranged in advance; however, the existing online monitoring device for the lightning arrester cannot perform effective remote online monitoring and fault pre-judgment on the development trend of external faults of the lightning arrester, and has the problems of incomplete monitoring data (for example, loose wires at the upper and lower connecting ends of the lightning arrester and dirt of an external porcelain bushing can cause temperature rise change of the lightning arrester, unqualified insulation of a base of the lightning arrester can cause a small leakage current measured value of the lightning arrester, damage of an equalizing ring of the lightning arrester, uneven voltage distribution along the lightning arrester due to unbalanced stray capacitance to the ground, and easy damage to places with high voltage), so that the basis of the condition maintenance criterion of the lightning arrester is incomplete.
There is chinese patent publication No. CN210181118U, publication No. 2020.03.24, which discloses a counter monitoring device and system for an arrester, the counter monitoring device includes a counter, an arrester and a protection circuit which are electrically connected in sequence, the input end of the protection circuit is electrically connected with the arrester, and the output end of the protection circuit is electrically connected with the input end of the counter. Through the utility model discloses a count monitoring devices can real-time supervision arrester leakage current's the situation of change and the action number of times of discharging of record arrester, according to leakage current's the situation of change, can in time judge the abnormal conditions of arrester operation in-process, and the emergence of prevention accident improves the reliability of electric power system steady operation.
In addition, chinese patent publication No. CN 111157919 a, publication No. 2020.05.15, discloses an online lightning arrester monitoring system based on cloud and mist coordination, which includes a data acquisition unit, an inspection device and a control center. The data acquisition unit is connected with the inspection equipment, the inspection equipment is connected with the data acquisition unit through a wireless network, and the inspection equipment is connected with the control center through a 5G network. The data acquisition unit acquires leakage current signals of the lightning arrester in real time, and the routing inspection equipment has the functions of data processing, data storage and lightning arrester infrared image shooting; and the control center analyzes the data uploaded by the inspection equipment to obtain the fault reason of the lightning arrester. Add loRa wireless communication module at data acquisition unit, can realize the arrester and patrol and examine the data wireless transmission between the equipment, reduce the cost. The routing inspection equipment is a fog node with counting and storage capacity, can calculate and obtain a third harmonic component of the resistive leakage current, and makes a preliminary judgment locally. And the control center identifies the lightning-protection fault reason by utilizing the deep learning model.
The above patent application has the following drawbacks: one of them cannot detect the reduction of the insulation resistance of the lightning arrester base; secondly, the appearance of the lightning arrester and accessories cannot be detected, and thirdly, the pollution current of a porcelain bushing outside the lightning arrester cannot be detected; the monitoring parameters are not complete, the internal and external faults or hidden dangers of the lightning arrester cannot be effectively pre-judged, and the overhaul items and periods are reasonably arranged in advance.
SUMMERY OF THE UTILITY MODEL
In order to overcome above-mentioned prior art's defect, the utility model provides an arrester multistation on-line monitoring system, its purpose is based on the operating parameter of multiple measuring device detection arrester, through to arrester leakage total current, resistive current, the fundamental wave current harmonic, filthy current, base insulation resistance, the arrester outward appearance, parameters such as the infrared temperature measurement of arrester and formation of image carry out the processing analysis, reach in advance to judge or discover the arrester in advance, the purpose of external fault and hidden danger, the maintainer of being convenient for arranges in advance to overhaul the maintenance plan, reduce the influence to electric power system steady operation, improve the reliable operating efficiency of electric power production equipment.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a multi-state on-line monitoring system for an arrester comprises a counter monitoring unit, a synchronous clock device, a data diagnosis and analysis module, a display and alarm module, a data collection unit and a data collection unit arranged at the arrester, wherein the data collection unit is in communication connection with the counter monitoring unit through the data collection unit, the counter monitoring unit is in communication connection with the synchronous clock device, the data diagnosis and analysis module and the display and alarm module, the data collection unit comprises a video storage module, the transmission equipment comprises wired transmission or wireless transmission, the data collection unit comprises a voltage collection device, a leakage current collection device, a pollution current collection device, an infrared temperature measurement and imaging device and a base insulation resistance collection device, the leakage current collection device is arranged at the leading-out end of a grounding wire of the arrester, the device comprises a lightning arrester, a base insulation resistance acquisition device, an infrared temperature measurement and imaging device, a voltage acquisition device, a porcelain bushing shielding ring, a grounding wire, a base insulation resistance acquisition device, a lightning arrester base, a grounding grid, a voltage transformer and a voltage acquisition device. The lightning arrester leakage total current, the fundamental wave current effective value and 3, 5 and 7 harmonics acquired by the data acquisition unit, the lightning stroke frequency, the standard voltage signal at the same-phase position of the lightning arrester, the lightning arrester base insulation resistance, the infrared imaging temperature and the appearance image of the lightning arrester are uploaded to the data acquisition unit in a digital quantity mode, the data acquisition unit transmits the acquired signal to the computer monitoring unit through a wired network, and remote monitoring and checking of monitoring data and data alarm prompting are achieved through data processing and analyzing software in a computer monitoring system.
Preferably, the computer monitoring unit comprises a synchronous clock device, a data diagnosis and analysis module and a display and alarm module, the synchronous clock device, the data diagnosis and analysis module and the display and alarm module are respectively connected with the computer monitoring unit through a network, and the computer monitoring unit is used for collecting and monitoring information collected by the data collection unit; the data diagnosis and analysis module automatically analyzes the variation trend of the monitoring quantity of the lightning arrester; the display and alarm module is used for setting an alarm threshold value of lightning arrester monitoring data for alarming; the synchronous clock device is used for the computer to monitor the unit data time. The data diagnosis analysis module and the display and alarm module are connected through a database. Based on data monitoring of a computer monitoring unit, establishing a curve chart on a data diagnosis and analysis module according to a Pearson theory, wherein the operation time is used as a Y axis, the leakage current of the normal operation of the lightning arrester is used as an X axis, and the middle collected data is used as a curve variable; the lightning arrester monitoring data alarm threshold is set on the display and alarm module, and the change trend of the lightning arrester monitoring quantity is observed through a curve chart, so that the effect of automatic diagnosis and analysis is achieved. According to the alarm information sent by the data diagnosis and analysis module, the display and alarm module issues trigger conditions by the association state maintenance task of the computer monitoring system, and when the alarm of the data diagnosis and analysis is met, the computer monitoring system automatically associates the corresponding lightning arrester state maintenance task single trigger.
The utility model has the advantages of it is following:
the utility model discloses will detect "arrester" real-time operation data based on multiple measuring device, relatively judge through the monitoring volume curve chart, discover promptly that the arrester is inside to be damped, the ageing problem of zinc oxide valve block, can discover again that the outside equalizer ring of arrester or equipment outward appearance damaged rate, the wiring end is not hard up and the base is insulating descends, thereby it is more perfect to make the arrester state overhaul criterion foundation, the maintainer of being convenient for arranges in advance to overhaul the maintenance plan, reduce the influence to power production equipment steady operation, improve the reliability of power system steady operation.
Drawings
Fig. 1 is a block diagram of the present invention.
The labels in the figure are: 1. the lightning arrester comprises a lightning arrester body, 2 voltage acquisition devices, 3 leakage current acquisition devices, 4 pollution current acquisition devices, 5 infrared temperature measurement and imaging devices, 6 base insulation resistance acquisition devices, 7 transmission equipment, 8 data collection units, 9 video storage modules, 10 synchronous clock devices, 11 counter monitoring units, 12 data diagnosis and analysis modules and 13 display and alarm modules.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples, which are conventional unless otherwise specified, and the materials can be commercially obtained from the disclosure without further specification.
A multi-state online monitoring system for an arrester is disclosed, as shown in figure 1, and comprises a computer monitoring unit 11, and data acquisition units 2-6 installed on the arrester 1 and an arrester in-phase PT, wherein the data acquisition units are in wired or wireless connection with a data acquisition unit 8 through a transmission device 7, the data acquisition unit 8 is in network connection with a video storage module 9, a synchronous clock device 10, the data acquisition unit 8 is in network connection with the computer monitoring unit 11 through a network cable and 485 in communication connection, and a data diagnosis analysis module 12, a display and alarm module 13 are connected with the computer monitoring unit 11 through a database. The data acquisition unit sends the acquired lightning arrester operating parameters to the computer monitoring unit 11, and the lightning arrester operating parameters are diagnosed and analyzed by the data diagnosis and analysis module 12 and then sent to the display and alarm module 13 to issue a state maintenance task.
The data acquisition unit comprises a voltage acquisition device 2, a leakage current acquisition device 3, a pollution current acquisition device 4, an infrared temperature measurement and imaging device 5 and a base insulation resistance acquisition device 6. The voltage acquisition device 2 is arranged at a secondary voltage leading-out end for measuring the in-phase voltage transformer of the arrester 1 and is used for acquiring an in-phase standard voltage signal of the arrester 1; the leakage current acquisition device 3 is arranged at the leading-out end of a grounding wire of the lightning arrester 1 and is used for acquiring leakage total current, fundamental current effective value, 3, 5 and 7 harmonic waves and lightning stroke times of the lightning arrester; the pollution current collecting device 4 is arranged between the porcelain bushing shielding ring outside the lightning arrester 1 and the grounding wire and is used for collecting the pollution current of the porcelain bushing outside the lightning arrester; the infrared temperature measurement and imaging device 5 is arranged beside the lightning arrester 1 and is used for collecting an infrared imaging temperature signal and an appearance imaging signal of the lightning arrester. The lightning arrester leakage total current, the fundamental wave current effective value and 3, 5 and 7 harmonics acquired by the data acquisition unit, the lightning stroke frequency, the standard voltage signal at the same-phase position of the lightning arrester, the lightning arrester base insulation resistance, the infrared imaging temperature and the appearance image of the lightning arrester are uploaded to the data acquisition unit in a digital quantity mode, the data acquisition unit transmits the acquired signal to the computer monitoring unit through a wired network, and remote monitoring and checking of monitoring data and data alarm prompting are achieved through data processing and analyzing software in a computer monitoring system.
The transmission device 7 comprises a wired or wireless communication mode and is used for communication connection between the data acquisition unit and the data collection unit 8. The data collection unit 8 is connected with the video storage module 9 and is used for collecting, converting and transmitting the collected data.
The computer monitoring unit 11 comprises a synchronous clock device 10, a data diagnosis and analysis module 12 and a display and alarm module 13, wherein the synchronous clock device 10 is in communication connection with the computer monitoring unit 11 through 485 and is used for data timing; the data diagnosis analysis module 12 and the display and alarm module 13 are respectively connected with the computer monitoring unit 11 through a database, and the computer monitoring device is used for collecting and monitoring information collected by the data collection unit; the data diagnosis and analysis module 12 automatically monitors and analyzes the variation trend of the monitoring quantity of the lightning arrester; the display and alarm module 13 sets an alarm threshold value of lightning arrester monitoring data for alarming.
Based on the data monitoring of the computer monitoring unit 11, a curve chart is established on the data diagnosis and analysis module 12 according to the Pearson theory, wherein the operation time is taken as an axis Y, the leakage current of the lightning arrester in normal operation is taken as an axis X, and the middle collected data is taken as a curve variable; the lightning arrester monitoring data alarm threshold is set on the display and alarm module 13, and the change trend of the lightning arrester monitoring quantity is observed through a curve chart, so that the effect of automatic diagnosis and analysis is achieved.
The specific analysis is as follows: 1) if the leakage current measured value of the lightning arrester and the insulation resistance value of the lightning arrester base are reduced and developed along with time, the insulation of the lightning arrester base is unqualified; 2) if the leakage total current of the lightning arrester keeps unchanged and the resistive current has a development trend of becoming larger, the lightning arrester indicates that the interior of the lightning arrester is slightly affected with damp or the zinc oxide valve plate is slightly degraded; 3) if the object characteristics of the arrester grading ring are found in the arrester imaging picture, the damage of the grading ring can be judged in advance; 4) if the pollution current of the lightning arrester is developed to be larger along with the time, the pollution degree of the porcelain bushing outside the lightning arrester is relatively serious; 5) if the leakage resistive current and the in-phase voltage of the lightning arrester have the increasing trend along with the change of time, the internal part of the lightning arrester can be judged to be affected with damp or a zinc oxide valve plate has a fault; 6) if 3, 5 and 7 harmonics in the lightning arrester fundamental current have increasing trend along with the change of time, the internal part of the lightning arrester can be judged to be affected with damp or a zinc oxide valve plate has faults; 7) if the temperature value of the infrared imaging temperature measurement of the lightning arrester has an increasing trend along with the time change, but the numerical values of 3, 5 and 7 harmonics in leakage resistive current, in-phase voltage or fundamental current show no increasing trend, the looseness of the upper and lower terminals of the lightning arrester can be judged in advance; 8) if the temperature value of the infrared imaging temperature measurement of the lightning arrester has an increasing trend along with the time change, and the leakage resistive current, the in-phase voltage value or the 3, 5 and 7 harmonic values in the fundamental current have an increasing trend, the internal fault of the lightning arrester can be judged; 9) if the temperature value of the infrared imaging temperature measurement of the lightning arrester has an increasing trend along with the time change, and 3, 5 and 7 harmonics in the leakage resistive current or the fundamental current have no numerical value display, but the homophase voltage of the lightning arrester has an increasing trend, the fault of the leakage current collecting device of the lightning arrester can be judged.
According to the data information sent by the data diagnosis and analysis module 12, a triggering condition is sent to the computer monitoring system associated state maintenance task through the display and alarm module 13, and when the data diagnosis and analysis alarm is met, the computer monitoring system automatically associates the corresponding arrester state maintenance task single trigger.
The maintainer preliminarily judges the fault point of the equipment according to the diagnosis condition of the lightning arrester monitoring data curve diagram in the computer monitoring system, and timely carries out state maintenance work, thereby avoiding overvoltage protection equipment faults when the power production equipment operates normally and further influencing the safe and stable operation of the electrical primary equipment.

Claims (3)

1. The utility model provides a many states on-line monitoring system of arrester, includes computer monitor unit (11), data acquisition unit (8) and installs the data acquisition unit on arrester (1), the data acquisition unit passes through data acquisition unit (8) with computer monitor unit (11) and is connected, data acquisition unit and data acquisition unit (8) pass through transmission equipment (7) and be connected its characterized in that: the data acquisition unit comprises a voltage acquisition device (2), a leakage current acquisition device (3), a pollution current acquisition device (4), an infrared temperature measurement and imaging device (5) and a base insulation resistance acquisition device (6); the lightning arrester is characterized in that a voltage acquisition device (2) is installed at an in-phase voltage transformer of the lightning arrester (1), a leakage current acquisition device (3) is installed at a lead-out end of a grounding wire of the lightning arrester (1), a dirty current acquisition device (4) is installed between an outer porcelain bushing shielding ring and the grounding wire of the lightning arrester (1), a base insulation resistance acquisition device (6) is installed between a base of the lightning arrester (1) and a grounding grid, and an infrared temperature measurement and imaging device (5) is installed beside the lightning arrester (1).
2. The lightning arrester multi-state online monitoring system according to claim 1, characterized in that: the system is characterized by further comprising a synchronous clock device (10), a data diagnosis and analysis module (12) and a display and alarm module (13), wherein the data diagnosis and analysis module (12) and the display and alarm module (13) are respectively connected with a computer monitoring unit (11) through a database, and the computer monitoring unit (11) is used for collecting and monitoring information collected by the data collection unit; the diagnosis and analysis module (12) automatically analyzes the variation trend of the monitoring quantity of the lightning arrester; and the display and alarm module (13) is used for setting an alarm threshold value of lightning arrester monitoring data for alarming.
3. The lightning arrester multi-state online monitoring system according to claim 1, characterized in that: the device is characterized by further comprising a video storage module (9), wherein the video storage module (9) is connected with the data collection unit (8) and used for collecting, converting and transmitting the collected data.
CN202022387741.3U 2020-10-23 2020-10-23 Multi-state online monitoring system for lightning arrester Active CN213986651U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022387741.3U CN213986651U (en) 2020-10-23 2020-10-23 Multi-state online monitoring system for lightning arrester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022387741.3U CN213986651U (en) 2020-10-23 2020-10-23 Multi-state online monitoring system for lightning arrester

Publications (1)

Publication Number Publication Date
CN213986651U true CN213986651U (en) 2021-08-17

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