CN106908684B - Multipoint measuring device for live-line detection of metal oxide arrester - Google Patents
Multipoint measuring device for live-line detection of metal oxide arrester Download PDFInfo
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- CN106908684B CN106908684B CN201710040754.3A CN201710040754A CN106908684B CN 106908684 B CN106908684 B CN 106908684B CN 201710040754 A CN201710040754 A CN 201710040754A CN 106908684 B CN106908684 B CN 106908684B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention discloses a multipoint measuring device for live detection of a metal oxide arrester, which comprises a plurality of sets of current isolator wiring devices and main test equipment, wherein each set of current isolator wiring device comprises a set of current sampling wire clamps of a three-phase leakage current meter of the arrester, a digital-to-analog conversion module and a slave wireless digital transmission module; the main test equipment comprises a main wireless data transmission module, a function arithmetic unit and a display terminal. According to the invention, a plurality of sets of current isolator wiring devices are designed, each set of current isolator wiring device corresponds to one set of lightning arrester, each set of current isolator wiring device has an independent communication address, the anti-collision problem in wireless communication is effectively solved, a test host and a voltage isolator (taking reference voltage) are fixed beside a certain bus voltage transformer terminal box, and a tester can test beside the test host after finishing wiring of the current isolators on all sets of lightning arresters in the early stage.
Description
Technical Field
The invention relates to the technical field of lightning arrester measurement, in particular to a multipoint measurement device for live-line detection of a metal oxide lightning arrester.
Background
At present, a metal oxide arrester is one of important protection devices for ensuring the safe operation of a power system, and is mainly used for limiting the overvoltage of the system, and leakage current is a very important reference index for assessing the quality of the arrester. The periodic test of leakage current under the operating state of the lightning arrester is an effective measure for judging the operating state of the lightning arrester. At present, the lightning arrester live detection device used by a tester generally adopts a wireless mode, namely, a voltage isolator or a current isolator adopts wireless transmission reference voltage or current data, and a measurement host calculates by utilizing the wirelessly received data to obtain a result.
No matter through voltage isolator mode or galvanic isolation ware mode, can only measure a set of arrester data at every turn of measurement, then same set of test device shifts to next group and carries out dismouting wiring again, at the in-process of repeated dismouting, has consumed a large amount of time, has increased test device probability of damage, and personnel move equipment in electrified interval, and the attention is too concentrated on experimental and neglects the safety factor, so also increased personnel's unsafe factor.
Disclosure of Invention
The invention aims to provide a multipoint measuring device for live-line detection of a metal oxide arrester, which can improve the live-line detection test efficiency of the arrester and reduce the probability of harm to workers and test devices.
The technical scheme adopted by the invention is as follows:
a multipoint measuring device for live detection of a metal oxide arrester comprises a plurality of sets of current isolator wiring devices and main test equipment, wherein each set of current isolator wiring device comprises a set of current sampling wire clamps of a three-phase leakage current meter of the arrester, a digital-to-analog conversion module and a slave wireless digital transmission module; the output end of the current isolator is in wireless connection with the main test equipment through the digital-to-analog conversion module and the slave wireless data transmission module in sequence; the main test equipment comprises a main wireless data transmission module, a function arithmetic unit and a display terminal, wherein the main wireless data transmission module is matched with the slave wireless data transmission module; the output end of the main wireless data transmission module is connected with the input end of the function arithmetic unit, and the output end of the function arithmetic unit is connected with the input end of the display terminal.
The communication between the master wireless data transmission module and any slave wireless data transmission module is realized by a time division technology, each slave wireless data transmission module has an independent ID address, and a data frame with an address code is adopted to send data or commands, so that the problem of co-frequency interference is avoided.
The invention designs a plurality of sets of current isolator wiring devices on the basis of the existing lightning arrester live detection device, each set of current isolator wiring device corresponds to one set of lightning arrester, each set of current isolator wiring device has an independent communication address, the anti-collision problem during wireless communication is effectively solved, a test host and a voltage isolator (taking reference voltage) are fixed beside a certain bus voltage transformer terminal box, and a tester can test beside the test host after finishing the wiring work of the current isolators on all sets of lightning arresters in the earlier stage. The testing device has accurate, real-time and reliable wireless data transmission, realizes the data transmission between one receiving end and a plurality of sending ends, and greatly improves the working efficiency of the live detection of the lightning arrester; the test does not need to move equipment, so that the abrasion of the test device is effectively reduced, and the safety of the electrical tester during operation is well guaranteed. The testing device has wide application range and good market prospect and application value.
Drawings
FIG. 1 is an electrical schematic block diagram of the present invention;
fig. 2 is a schematic diagram of the data transmission of the present invention.
In the figure: 1. a multipoint measuring device for live detection of a metal oxide arrester comprises a current isolator wiring device 2, a current sampling wire clamp 3, a leakage current sampling signal 4, a digital-to-analog conversion module 5, a wireless data transmission module 6, an antenna 7, an antenna 8 and a grounding terminal.
Detailed Description
As shown in fig. 1 and 2, the invention is used for measuring the leakage current of the valve plate inside the metal oxide arrester in the operating state by using the arrester leakage current tester in the operating state of the metal oxide arrester. The system comprises a plurality of sets of current isolator wiring devices 2 and main test equipment, wherein the plurality of sets of current isolator wiring devices 2 respectively comprise wiring of a set of lightning arrester three-phase leakage current meter, a current sampling wire clamp 3, a current isolator, a digital-to-analog conversion module 5 and a slave wireless data transmission module 6, the current sampling wire clamp 3 is used for short-circuit of the leakage current meter and is connected with the three-phase input end of the current isolator through the wiring, and the grounding end of the current isolator is connected with the ground; the output end of the current isolator is in wireless connection with the main test equipment through the digital-to-analog conversion module 5 and the slave wireless data transmission module 6 in sequence;
the slave wireless data transmission module 6 is responsible for transmitting the response data of the leakage current sampling device to the master wireless data transmission module. In order to avoid the problem of co-channel interference, the system adopts a time division technology to separate the communication between a main wireless data transmission module and any one of the slave wireless data transmission modules 6 of the system in a time division mode, each slave wireless data transmission module 6 has an independent ID address, and a data frame with an address code is adopted to send data or commands.
The main test equipment comprises a main wireless data transmission module, a function arithmetic unit and a display terminal, wherein the main wireless data transmission module is matched with the slave wireless data transmission module 6; the output end of the main wireless data transmission module is connected with the input end of the function arithmetic unit, and the output end of the function arithmetic unit is connected with the input end of the display terminal. The main test equipment is the host of the measuring device; each current isolator is connected with the testing end of the lightning arrester, only single-channel transmission is available before, and after the transmission is finished, the host and the testing end both need to be moved again to reconnect the wires. The main test equipment has various models, and can collect and process test data, and the same test host, namely a manufacturer of the arrester resistive current tester, can realize the function, and the main test equipment is in the protection range of the invention.
The invention is composed of a main wireless module and a plurality of slave wireless modules, can realize the transmission between multipoint-to-point wireless data, each slave wireless module has an independent processor, the communication with the main wireless module is not affected, the whole system can not be out of control due to the fault of a certain wireless module, the reliability of the system can be improved, and the maintenance is more convenient. The main wireless data transmission module is responsible for carrying out proper processing (checking, unpacking, packaging and the like) on response data returned by peripheral equipment at the measuring point, and transmitting the response data to the function arithmetic unit through the data line for data operation.
The communication between the master wireless data transmission module and any slave wireless data transmission module 6 is a time division technology, each slave wireless data transmission module 6 has an independent ID address, and a data frame with an address code is adopted to send data or commands, so that the problem of co-frequency interference is avoided.
The invention designs a plurality of sets of current isolator wiring devices 2, each set of current isolator wiring device 2 corresponds to wiring of a set of lightning arrester three-phase leakage current meters, the leakage current meters are in short circuit connection through a current sampling wire clamp 3, so that a leakage current sampling signal 4 under the operating voltage of the lightning arrester enters the current isolator wiring device 2, and a current test loop is formed through a grounding terminal 8. The internal circuit of the wiring device 2 of the galvanic isolator comprises a digital-to-analog conversion module 5 and a slave wireless data transmission module 6, and a leakage current sampling signal 4 is transmitted out through the slave wireless data transmission module 6 and an antenna 7 after being converted into a digital signal through the digital-to-analog conversion module 5 and then received by main testing equipment. The leakage current sampling digital signals received by the main test equipment are transmitted to the function arithmetic unit through the main wireless data transmission module, and the function arithmetic unit performs Fourier transform analysis processing on the digital signals and finally provides the digital signals for the test data display terminal. So far, all the data stream transmission process is finished.
Before using, the tester uses galvanic isolation ware termination 2 to connect experimental wiring earlier all arresters to ensure that the experimental wiring of every arrester of group is correct (leakage current table is almost totally by the short circuit, ground terminal ground connection performance is good), simultaneously, be responsible for the bus voltage transformer terminal box that test tester selected a position comparatively suitable (generally is in the transformer substation intermediate position, can compromise the test signal receipt of all arresters), fix main test equipment beside this voltage transformer terminal box, need not remove again or change any equipment wiring. And immediately carrying out the live-line test work of the lightning arresters after the connection of all the test points and the main test equipment is qualified, and completing the live-line detection work of all the lightning arresters at one time.
The above-described embodiments are intended to illustrate rather than to limit the invention, and all changes and modifications that come within the spirit of the invention and the scope of the appended claims are intended to be embraced therein.
On the basis of the existing arrester live detection device, the invention adopts a master-slave distributed and time division technology to realize the point-to-multipoint wireless data transmission system design, namely, a plurality of sets of current isolator wiring devices are designed, each set of current isolator wiring device corresponds to one set of arrester, each set of current isolator wiring device is provided with an independent communication address, the anti-collision problem during wireless communication is effectively solved, a test host and a voltage isolator (taking reference voltage) are fixed beside a certain bus voltage transformer terminal box, and a tester can test by the test host after finishing the wiring work of the current isolators on all sets of arresters in the earlier stage. The testing device has accurate, real-time and reliable wireless data transmission, realizes the data transmission between one receiving end and a plurality of sending ends, and greatly improves the working efficiency of the live detection of the lightning arrester; the test does not need to move equipment, so that the abrasion of the test device is effectively reduced, and the safety of the electrical tester during operation is well guaranteed.
Claims (2)
1. The utility model provides a metal oxide arrester live detection multiple spot measuring device which characterized in that: the lightning arrester wiring device comprises a plurality of sets of current isolator wiring devices (2) and main test equipment, wherein each set of current isolator wiring device (2) comprises a set of current sampling wire clamps (3) of a lightning arrester three-phase leakage ammeter, a digital-to-analog conversion module (5) and a slave wireless data transmission module (6), the current sampling wire clamps (3) are used for short-circuit of the leakage ammeter and are connected with the three-phase input end of a current isolator through wiring, and the grounding end of the current isolator is connected with the ground; the output end of the current isolator is in wireless connection with the main test equipment through a digital-to-analog conversion module (5) and a slave wireless data transmission module (6) in sequence; the main test equipment comprises a main wireless data transmission module, a function arithmetic unit and a display terminal, wherein the main wireless data transmission module is matched with the slave wireless data transmission module (6); the output end of the main wireless data transmission module is connected with the input end of the function arithmetic unit, and the output end of the function arithmetic unit is connected with the input end of the display terminal.
2. The multipoint measuring device (1) for the live detection of the metal oxide arrester according to claim 1, characterized in that: each slave wireless data transmission module (6) has an independent ID address, and data or commands are sent by adopting data frames with address codes, so that the problem of co-channel interference is avoided.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710040754.3A CN106908684B (en) | 2017-01-20 | 2017-01-20 | Multipoint measuring device for live-line detection of metal oxide arrester |
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| CN201710040754.3A CN106908684B (en) | 2017-01-20 | 2017-01-20 | Multipoint measuring device for live-line detection of metal oxide arrester |
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| CN106908684A CN106908684A (en) | 2017-06-30 |
| CN106908684B true CN106908684B (en) | 2023-04-07 |
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| CN110346713A (en) * | 2019-07-30 | 2019-10-18 | 国网浙江省电力公司宁波供电公司 | A method of temperature rise test is completed at the same time for more 10kV on-pole switch primary connections |
| CN112924898A (en) * | 2020-12-30 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | Inside full current measuring device of metal oxide arrester |
| CN115097168B (en) * | 2022-06-23 | 2023-10-31 | 国网湖北省电力有限公司宜昌供电公司 | Multifunctional wiring device for live test of lightning arrester |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015117304A1 (en) * | 2014-02-07 | 2015-08-13 | 国电南瑞科技股份有限公司 | System for online monitoring of zinc oxide arrester and method thereof |
| CN105548765A (en) * | 2015-12-31 | 2016-05-04 | 国网浙江省电力公司金华供电公司 | GIS zinc oxide lightning arrester live-line tester |
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- 2017-01-20 CN CN201710040754.3A patent/CN106908684B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015117304A1 (en) * | 2014-02-07 | 2015-08-13 | 国电南瑞科技股份有限公司 | System for online monitoring of zinc oxide arrester and method thereof |
| CN105548765A (en) * | 2015-12-31 | 2016-05-04 | 国网浙江省电力公司金华供电公司 | GIS zinc oxide lightning arrester live-line tester |
Non-Patent Citations (1)
| Title |
|---|
| 袁海燕 ; 庄燕飞 ; 任庆帅 ; 于莎 ; 李凯 ; .改进的特高压金属氧化物避雷器带电测试方法.电瓷避雷器.2011,(06),全文. * |
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