CN102539877A - Resistive current energized monitoring system for metal oxide arrester (MOA) based on compass synchronous time service - Google Patents
Resistive current energized monitoring system for metal oxide arrester (MOA) based on compass synchronous time service Download PDFInfo
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- CN102539877A CN102539877A CN2010105997954A CN201010599795A CN102539877A CN 102539877 A CN102539877 A CN 102539877A CN 2010105997954 A CN2010105997954 A CN 2010105997954A CN 201010599795 A CN201010599795 A CN 201010599795A CN 102539877 A CN102539877 A CN 102539877A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 16
- 229910044991 metal oxide Inorganic materials 0.000 title abstract 2
- 150000004706 metal oxides Chemical class 0.000 title abstract 2
- 238000004891 communication Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 208000025274 Lightning injury Diseases 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 13
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229960001296 zinc oxide Drugs 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 208000033999 Device damage Diseases 0.000 description 1
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The invention relates to a resistive current energized monitoring system for a metal oxide arrester (MOA) based on compass synchronous time service. The system comprises a constant voltage transformer (CVT) on-line detection terminal, an MOA handheld detection terminal and an upper computer, wherein the CVT on-line detection terminal is arranged at an on-site CVT; the MOA handheld detection terminal is connected to two ends of a lightning-stroke counter which is connected in series to the lower end of the MOA; the CVT on-line detection terminal is in wireless communication connection with the MOA handheld detection terminal; and the MOA handheld detection terminal is connected with the upper computer. Compared with the prior art, the resistive current energized monitoring system for the MOA based on the compass synchronous time service has the advantages of accurate and comprehensive measurement data, simplicity in wiring, low cost and the like.
Description
Technical field
The present invention relates to a kind of MOA current in resistance property live monitoring system, especially relate to a kind of MOA current in resistance property live monitoring system based on the synchronous time service of COMPASS.
Background technology
Zinc-Oxide Arrester (MOA) has crucial effect on the protection safe operation of power system, owing to bear influences such as power-frequency voltage, surge voltage and internal wetted for a long time, cause that inner ZnO valve plate is aging; Insulation characterisitic is destroyed; Showing as resistive Leakage Current increases, and total leakage current, loss also increase thereupon, causes the inner valve block temperature of MOA to raise; Finally cause the generation of thermal breakdown even explosion accident, have a strong impact on the safe operation of electrical network.
The monitoring method that present Zinc-Oxide Arrester mainly uses is directly to exchange milliammeter monitoring total current method in MOA earth terminal serial connection, and this method major advantage is that method is easy, is suitable for a large amount of at the scene the monitoring and uses; Can in time find the remarkable degradation of MOA; But shortcoming is very insensitive to the premature ageing of discovery MOA, at the MOA initial operating stage, flows through in the total current of normal MOA; Resistive component only accounts for circuital 10%～20%; Like this, enlarge markedly even resistive component is existing, circuital variation is still very not obvious measuring.Therefore accurately measure the variation of MOA resistive leakage current in service, important meaning is arranged finding early stage MOA fault.
Existing on the market oxidisability lightning arrester detection system mostly is a single equipment; Secondary side from voltage transformer (VT) (PT or CVT) takes out voltage signal respectively; Take out current signal from the counter two ends of MOA lower end; Simultaneously the voltage signal of PT (CVT) secondary side of homophase is sampled with the leakage current signal that flows through MOA then, use the phase differential that certain method calculates voltage and electric current, the effective value that arrives current in resistance property that utilizes phase differential and circuital effective value to calculate.This metering system all need be from the wiring of PT (CVT) secondary side in each measuring process.In transformer station, because being carried out wiring, PT (CVT) secondary side has certain risk, misoperation can cause problems such as protection would trip, and wiring needs to cause the measuring process complicated and time consumption than complicated process.
Summary of the invention
The object of the invention is exactly for the defective that overcomes above-mentioned prior art existence a kind of MOA current in resistance property live monitoring system based on the synchronous time service of COMPASS to be provided.
The object of the invention can be realized through following technical scheme:
A kind of MOA current in resistance property live monitoring system based on the synchronous time service of COMPASS; It is characterized in that; Comprise the online sense terminals of CVT, the hand-held sense terminals of MOA, host computer, the online sense terminals of described CVT is installed in on-the-spot CVT place, and the hand-held sense terminals of described MOA is connected the lightning stroke counter two ends that the MOA lower end is connected in series; The online sense terminals of described CVT is connected with the hand-held sense terminals radio communication of MOA, and the hand-held sense terminals of described MOA is connected with host computer.
The online sense terminals of described CVT adopts commercially available CVT online detection instrument, and the online sense terminals of described CVT is provided with a plurality of.
The hand-held sense terminals of described MOA comprises holding circuit, amplifying circuit, MCU, COMPASS module, wireless communication module, storer, LCDs, keyboard; Described holding circuit one terminates at the lightning stroke counter two ends that the MOA lower end is connected in series; The described holding circuit other end is connected with amplifying circuit, and described MCU is connected with amplifying circuit, COMPASS module, wireless communication module, storer, LCDs, keyboard respectively.
Described storer is connected with host computer through the host computer interface.
Compared with prior art, the present invention has the following advantages:
1, measurement data adopts the synchronous time service and the wireless communication technique of Beidou satellite navigation and positioning system (Compass) accurately, comprehensively, and system is divided into two with original single equipment; One is fixedly installed in the CVT side; Another one is made mancarried device, and both realize the measurement of MOA voltage and leakage current phase angle through Big Dipper time synchronized, obtains current in resistance property thereby calculate; Compass can provide the precise time label of measurement simultaneously, is convenient to historical data analysis.
2, wiring is simple, cost is low, and the wiring of secondary side is fixedly installed in the CVT monitoring device, has saved the wiring in the measuring process, and can monitor the duty of CVT.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is an instrumentation plan of the present invention;
Fig. 3 is the structural representation of the hand-held sense terminals of MOA of the present invention;
Fig. 4 is of the present invention based on the synchronous measurement sequential synoptic diagram of COMPASS.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
Like Fig. 1, shown in Figure 2; A kind of MOA current in resistance property live monitoring system based on the synchronous time service of COMPASS; Comprise the online sense terminals of CVT 3, the hand-held sense terminals 2 of MOA, host computer 1; The online sense terminals 3 of described CVT is installed in on-the-spot CVT place; The hand-held sense terminals 2 of described MOA is connected the lightning stroke counter two ends that the MOA lower end is connected in series, and the online sense terminals 3 of described CVT is connected with hand-held sense terminals 2 radio communications of MOA, and the hand-held sense terminals 2 of described MOA is connected with host computer 1.
As shown in Figure 3; The hand-held sense terminals 2 of described MOA comprises holding circuit, amplifying circuit, MCU, COMPASS module, wireless communication module, storer, LCDs, keyboard; Described holding circuit one terminates at the lightning stroke counter two ends that the MOA lower end is connected in series; The described holding circuit other end is connected with amplifying circuit, and described MCU is connected with amplifying circuit, COMPASS module, wireless communication module, storer, LCDs, keyboard respectively.The full current signal that flows through the hand-held sense terminals 2 of MOA is drawn through current clamp from the lightning stroke counter two ends that the lightning arrester lower end is connected in series.Holding circuit is used for protecting device interior device and personal security, big electric current occurs in case Measuring Time MOA goes up, and causes device damage and injury to personnel.
The online sense terminals 3 of CVT is responsible for gathering and the monitoring three-phase voltage; And the time service function synchro measure through Compass is measured and is calculated the instantaneous phase angle of voltage fundamental when MOA resistive current first harmonics component detection, the mode of the initial phase that records through wireless communication transmission is passed to the hand-held sense terminals 2 of MOA carry out further computing.Three voltage datas of monitoring will be stored in the Flash storer at ordinary times, when MOA sends download command, give MOA with data transmission.
The hand-held sense terminals 2 of MOA is made a portable handheld terminal, carries the hand-held sense terminals 2 of a MOA and just can test the MOA testing current in resistance property to a plurality of transformer stations that the online sense terminals 3 of CVT has been installed.Inform that through wireless data communication the online sense terminals 3 of CVT carries out synchro measure in the process of measuring, after the online sense terminals 3 of CVT sends measurement result, adopt phase difference detection algorithm computation to differ and current in resistance property based on Fourier.The hand-held sense terminals 2 of MOA can also download to hand-held sense terminals 2 stored of MOA with the CVT secondary side voltage history data that write down on the online sense terminals 3 of CVT through Wireless transmission mode, and can historical voltage data of CVT and MOA current in resistance property measurement data be uploaded in the host computer through the data connector.
Host computer can be collected storage with the data of uploading in the hand-held sense terminals 2 of MOA; And can CVT secondary side voltage history data and MOA voltage and circuital phase differential, total current value, current in resistance property value, capacity current value is graphical, be convenient to follow-up analysis and research.
The key that the MOA current in resistance property is measured is that voltage and current synchronization measuring are to obtain accurate phase differential.The present invention uses Compass to solve the problem of synchro measure, and Compass can export the square wave of a 1Hz, is called the PPS ripple.This square wave signal via satellite carries out synchronously, and the time error between distinct device between the PPS ripple rising edge is minimum, below 1 μ s, corresponding to 0.018 ° in the power frequency period, enough is used as the signal of synchro measure.
Principle such as Fig. 4 that the present invention realizes synchronously.The method that realizes is used for obtaining clock signal synchronous on hand-held sense terminals 2 of MOA and the online sense terminals 3 of CVT, the COMPASS module being installed respectively.In the time of need carrying out the measurement of MOA current in resistance property; Wait for next PPS pulse by the hand-held sense terminals 2 of MOA earlier, arrive, trigger controller with its rising edge when the PSS pulse; The online sense terminals 3 of CVT is sent measuring command, and begin step-by-step counting PPS from next PPS pulse.After the online sense terminals 3 of CVT is received measuring command, also begin the step-by-step counting to PPS from next PPS pulse, when counting down to a predetermined value, the both sides device just begins to gather voltage and current signal and calculates.After calculating completion; The online sense terminals 3 of CVT is passed the phase number that calculates back MOA hand-held sense terminals 2 through Wireless transmission mode; Handle by hand-held 2 pairs of two data of sense terminals of MOA; Obtain phase signal and, so just both guaranteed the simplicity of measuring process, guaranteed the accuracy of measurement result again data storage.
Claims (4)
1. MOA current in resistance property live monitoring system based on the synchronous time service of COMPASS; It is characterized in that; Comprise the online sense terminals of CVT, the hand-held sense terminals of MOA, host computer, the online sense terminals of described CVT is installed in on-the-spot CVT place, and the hand-held sense terminals of described MOA is connected the lightning stroke counter two ends that the MOA lower end is connected in series; The online sense terminals of described CVT is connected with the hand-held sense terminals radio communication of MOA, and the hand-held sense terminals of described MOA is connected with host computer.
2. a kind of MOA current in resistance property live monitoring system based on the synchronous time service of COMPASS according to claim 1 is characterized in that, the online sense terminals of described CVT adopts commercially available CVT online detection instrument, and the online sense terminals of described CVT is provided with a plurality of.
3. a kind of MOA current in resistance property live monitoring system according to claim 1 based on the synchronous time service of COMPASS; It is characterized in that; The hand-held sense terminals of described MOA comprises holding circuit, amplifying circuit, MCU, COMPASS module, wireless communication module, storer, LCDs, keyboard; Described holding circuit one terminates at the lightning stroke counter two ends that the MOA lower end is connected in series; The described holding circuit other end is connected with amplifying circuit, and described MCU is connected with amplifying circuit, COMPASS module, wireless communication module, storer, LCDs, keyboard respectively.
4. a kind of MOA current in resistance property live monitoring system based on the synchronous time service of COMPASS according to claim 1 is characterized in that, described storer is connected with host computer through the host computer interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105997954A CN102539877A (en) | 2010-12-22 | 2010-12-22 | Resistive current energized monitoring system for metal oxide arrester (MOA) based on compass synchronous time service |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105997954A CN102539877A (en) | 2010-12-22 | 2010-12-22 | Resistive current energized monitoring system for metal oxide arrester (MOA) based on compass synchronous time service |
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| CN102539877A true CN102539877A (en) | 2012-07-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608392A (en) * | 2012-03-22 | 2012-07-25 | 上海市电力公司 | MOA (metal oxide arrester) resistive current detection system |
| CN102621372A (en) * | 2012-03-22 | 2012-08-01 | 上海市电力公司 | CVT (Constant-Voltage Transformer) monitoring device for monitoring MOA (Metal Oxide Arrester) voltage |
| CN103207378A (en) * | 2013-03-22 | 2013-07-17 | 中国电力科学研究院 | Lightning arrester resistive current source simulation system |
| CN104267237A (en) * | 2014-09-25 | 2015-01-07 | 广东电网有限责任公司中山供电局 | Resistive current measuring method and device for line arrester |
| CN104880598A (en) * | 2015-06-17 | 2015-09-02 | 江苏省电力公司苏州供电公司 | Induced current monitor for cable sheath |
| CN109061275A (en) * | 2018-05-23 | 2018-12-21 | 中国电力科学研究院有限公司 | A kind of distributed On-line Monitoring of Leakage Current method and system of series compensation device voltage limiter |
-
2010
- 2010-12-22 CN CN2010105997954A patent/CN102539877A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 王又佳: "基于GPS同步的MOA阻性电流带电检测系统", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608392A (en) * | 2012-03-22 | 2012-07-25 | 上海市电力公司 | MOA (metal oxide arrester) resistive current detection system |
| CN102621372A (en) * | 2012-03-22 | 2012-08-01 | 上海市电力公司 | CVT (Constant-Voltage Transformer) monitoring device for monitoring MOA (Metal Oxide Arrester) voltage |
| CN103207378A (en) * | 2013-03-22 | 2013-07-17 | 中国电力科学研究院 | Lightning arrester resistive current source simulation system |
| CN103207378B (en) * | 2013-03-22 | 2015-09-09 | 中国电力科学研究院 | A kind of arrester resistance current source analogue system |
| CN104267237A (en) * | 2014-09-25 | 2015-01-07 | 广东电网有限责任公司中山供电局 | Resistive current measuring method and device for line arrester |
| CN104267237B (en) * | 2014-09-25 | 2017-10-20 | 广东电网有限责任公司中山供电局 | Leakage conductor current in resistance property measuring method and device |
| CN104880598A (en) * | 2015-06-17 | 2015-09-02 | 江苏省电力公司苏州供电公司 | Induced current monitor for cable sheath |
| CN109061275A (en) * | 2018-05-23 | 2018-12-21 | 中国电力科学研究院有限公司 | A kind of distributed On-line Monitoring of Leakage Current method and system of series compensation device voltage limiter |
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Owner name: STATE GRID CORPORATION OF CHINA SHANGHAI JIULONG E Free format text: FORMER OWNER: SHANGHAI ZHONGQU ENERGY-SAVING TECHNOLOGY CO. LTD. SHANGHAI JIAOTONG UNIVERSITY Effective date: 20121219 |
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Effective date of registration: 20121219 Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant after: Shanghai Electric Power Corporation Applicant after: State Grid Corporation of China Applicant after: SHANGHAI JIULONG ENTERPRISE MANAGEMENT CONSULTING CO., LTD. Applicant after: Shanghai Jiao Tong University Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant before: Shanghai Electric Power Corporation Applicant before: Shanghai Zhongqu Electric Energy Saving Technology Co., Ltd. Applicant before: Shanghai Jiao Tong University |
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Application publication date: 20120704 |