CN102323508A - Performance online detection device of induction type oxide arrester - Google Patents
Performance online detection device of induction type oxide arrester Download PDFInfo
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- CN102323508A CN102323508A CN201110279733A CN201110279733A CN102323508A CN 102323508 A CN102323508 A CN 102323508A CN 201110279733 A CN201110279733 A CN 201110279733A CN 201110279733 A CN201110279733 A CN 201110279733A CN 102323508 A CN102323508 A CN 102323508A
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Abstract
The invention discloses a performance online detection device of an induction type oxide arrester, which comprises a data acquirer capable of acquiring a voltage signal of a transmission electric power line and a current signal of an arrester loop, and a data receiving box for receiving data acquired and processed by the data acquirer, wherein the data acquirer is in connection communication with the data receiving box through a 485 interface circuit. The online detection device disclosed by the invention charges a super capacitor by using small energy provided by leaked current of the arrester, and is used as a working power supply of the data acquirer without external power supply; and voltage phase information is indirectly obtained by adopting a capacitor type voltage sensor. The performance of the arrester is judged by using a method of combining a phase angle method with a resistive current method, performance online monitoring of the arrester can be realized according to total current, phase difference or resistive current calculated through measurement, the performance of an MOA (Metal Oxide Arrester) can be more clearly, accurately and conveniently detected and judged, abnormal phenomena and accident potentials are immediately found, and better operation state of the arrester is ensured.
Description
Technical field
The present invention relates to a kind of lightning arrester performance on-line measuring device, belong to the detection technique field.
Background technology
In recent years, the metal oxide arrester (MOA) that aspect overvoltage protection, has plurality of advantages has progressively replaced original valve arrester, in electric system, has obtained widespread use.Because lightning arrester will bear system's working voltage effect for a long time, the catabiosis of MOA valve block will occur, and effect of factors such as aging, moist, filth and superpotential can cause the increase of current in resistance property and lightning arrester power; Valve block can aggravate deterioration gradually; Cause the MOA insulation characterisitic to be destroyed, lose protective effect and cause thermal runaway, when serious even also can blast; And in a single day the MOA accident takes place, can lead to grave consequences.Therefore, the good and bad reliable detection of MOA performance, judgement have been become a noticeable problem.In order to find in time that MOA makes moist, aging and other hidden danger, avoid because of accident causes the tremendous economic loss, must carry out that effective performance is good and bad to be detected and condition diagnosing to MOA.
At present, the mode of detection MOA mainly is the prophylactic tria that periodically has a power failure.Periodically prophylactic tria generally carries out under power down mode, is the comparatively general detection means that electric system is used the earliest.Periodically the shortcoming of prophylactic tria is lightning arrester is had a power failure test, and process also comparatively bothers, and not only influences normal power supply but also waste time and energy.
Summary of the invention
Technical matters to be solved by this invention provides a kind of induction type oxide lightning arrester performance on-line measuring device; Can under situation about not having a power failure, understand the runnability of MOA at any time; Can be more clear, accurately and easily the performance quality to MOA detects judgement, the phenomenon that in time notes abnormalities and accident potential are to take effective preventive measure; The accident that prevents takes place or enlarges to cause bigger economic loss, guarantees that it moves under good state.
For solving the problems of the technologies described above, the present invention provides a kind of induction type oxide lightning arrester performance on-line measuring device, it is characterized in that, comprises
Can gather the data acquisition unit of transmission of electricity electric power line voltage signal and lightning arrester loop current signals,
Receive the Data Receiving box of the data of said data acquisition unit acquisition process,
Said data acquisition unit is connected communication with said Data Receiving box through 485 interface circuits,
Said data acquisition unit comprises A phase data collector, B phase data collector and C data collector mutually.
Said data acquisition unit comprises
Gather transmission of electricity electric power line voltage voltage of signals sensor,
Be serially connected with the current sensor of gathering current signal in the lightning arrester loop,
The signal of said voltage sensor and said current sensor collection is carried out the filtering shaping circuit of filter shape,
The microprocessor that signal to filter shape is handled, calculated, compares.
Said voltage sensor is the capacitor voltage sensor.
Said data acquisition unit working power is a super capacitor, and said super capacitor is charged by leakage current of an arrester.
Said data acquisition unit also comprises the lightning arrester lightning stroke counter that is connected with said microprocessor.
Said Data Receiving box comprises microprocessor, and the display circuit that is connected with said microprocessor is the power circuit of said microprocessor power supply.
Said Data Receiving box also comprises 485 interface expanded circuits.
The beneficial effect that the present invention reached:
The small energy that induction type oxide lightning arrester performance on-line measuring device of the present invention adopts leakage current of an arrester to provide charges to super capacitor, as the data acquisition unit working power, does not need externally fed; Adopt the capacitor voltage sensor to obtain voltage-phase information indirectly.Method with phase horn cupping and current in resistance property method combine is judged the lightning arrester performance; Can realize the lightning arrester performance on-line monitoring according to measuring the total current, phase differential or the current in resistance property that calculate; Can be more clear, accurately and easily the performance quality to MOA detects judgement; The phenomenon that in time notes abnormalities and accident potential guarantee the good running status of lightning arrester.
Description of drawings
Fig. 1 is an induction type oxide lightning arrester performance on-line measuring device structural representation;
Fig. 2 is the data acquisition unit synoptic diagram;
Fig. 3 is a Data Receiving box synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Capacitor induction type oxide lightning arrester device for detecting performance general structure is as shown in Figure 1.This pick-up unit mainly is made up of data acquisition unit and Data Receiving box.Data acquisition unit comprises A, B, C phase data collector, carries out wired connection through 485 between three-phase lightning protector data acquisition unit and the Data Receiving box, accomplishes data communication.
As shown in Figure 2, data acquisition unit carries out data communication through 485 interface circuits and Data Receiving box.Data acquisition unit utilizes the voltage waveform signal of capacitor voltage sensor acquisition high voltage power transmission power circuit; Carry out filter shape through filtering shaping circuit; And deliver to the microprocessor of data acquisition unit through wired mode, microprocessor adopts low-power consumption 430 single-chip microcomputers in the present embodiment.Current sensor is serially connected with in the lightning arrester loop and gathers current signal, obtains current phase signal through filtering shaping circuit.The microprocessor of data acquisition unit compares the MOA total current and the total current phase signal of voltage waveform signal that receives and current sensor collection in real time; Obtain the phase signal between total current and operation power frequency reference voltage, and draw data results such as total current, phase differential and resistive current component through signal Processing and calculating etc.According to processing, analysis and comparison to the data result, can make accurate diagnosis to the MOA performance state, this method makes the MOA Performance Detection easier and more accurate.
The small energy that data acquisition unit adopts leakage current of an arrester to provide charges to super capacitor; As working power, lightning arrester can provide and be not less than 200 microamperes of leakage currents, and the data acquisition unit working current is controlled at less than 200 microamperes; The energy that guarantees input like this is greater than the output energy; The electric energy of continuous firing can be provided for data acquisition unit, not need externally fed, be applicable to 10-220KV lightning arrester on-line monitoring.
The capacitor voltage sensor is adopted in the collection of voltage phase signal, just can obtain voltage signal near high-voltage charged body when the capacitor voltage sensor is installed, and obtains voltage phase signal through filtering shaping circuit.
Current signals adopts the little electric current current sensor of high precision, is serially connected in the arrester ground loop, obtains current phase signal through filtering shaping circuit.
Measurement data can be total current, phase differential or current in resistance property.
As shown in Figure 3, the Data Receiving box receives the data of data acquisition unit through 485 interface circuits.
A phase data collector, B phase data collector and C phase data collector are connected with Data Receiving box bus through 485 interface circuits respectively; A phase lightning arrester, B phase lightning arrester and the C that A phase data collector, B phase data collector, C phase data collector the are obtained performance parameter information of lightning arrester mutually sends the Data Receiving box to; The Data Receiving box is with the A phase lightning arrester, B phase lightning arrester and the C that the obtain performance parameter information of lightning arrester mutually; Show on the spot through display circuit, be sent to the remote monitoring center again through 485 interface expanded circuits simultaneously.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and distortion, these improvement and distortion also should be regarded as protection scope of the present invention.
Claims (7)
1. an induction type oxide lightning arrester performance on-line measuring device is characterized in that, comprises
Can gather the data acquisition unit of transmission of electricity electric power line voltage signal and lightning arrester loop current signals,
Receive the Data Receiving box of the data of said data acquisition unit acquisition process,
Said data acquisition unit is connected communication with said Data Receiving box through 485 interface circuits,
Said data acquisition unit comprises A phase data collector, B phase data collector and C data collector mutually.
2. induction type oxide lightning arrester performance on-line measuring device according to claim 1 is characterized in that said data acquisition unit comprises
Gather transmission of electricity electric power line voltage voltage of signals sensor,
Be serially connected with the current sensor of gathering current signal in the lightning arrester loop,
The signal of said voltage sensor and said current sensor collection is carried out the filtering shaping circuit of filter shape,
The microprocessor that signal to filter shape is handled, calculated, compares.
3. induction type oxide lightning arrester performance on-line measuring device according to claim 2 is characterized in that said voltage sensor is the capacitor voltage sensor.
4. induction type oxide lightning arrester performance on-line measuring device according to claim 1 and 2 is characterized in that said data acquisition unit working power is a super capacitor, and said super capacitor is charged by leakage current of an arrester.
5. induction type oxide lightning arrester performance on-line measuring device according to claim 2 is characterized in that, said data acquisition unit also comprises the lightning arrester lightning stroke counter that is connected with said microprocessor.
6. induction type oxide lightning arrester performance on-line measuring device according to claim 1 is characterized in that said Data Receiving box comprises microprocessor, and the display circuit that is connected with said microprocessor is the power circuit of said microprocessor power supply.
7. induction type oxide lightning arrester performance on-line measuring device according to claim 6 is characterized in that said Data Receiving box also comprises 485 interface expanded circuits.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102841234A (en) * | 2012-09-18 | 2012-12-26 | 辽宁省电力有限公司电力科学研究院 | Non-residual voltage monitoring device for gapless metal oxide lightning arresters and measurement method |
| CN103197169A (en) * | 2013-02-25 | 2013-07-10 | 河海大学常州校区 | Lightning arrester comprehensive performance detection circuit |
| CN104101767A (en) * | 2014-08-08 | 2014-10-15 | 长沙金艺电子科技有限公司 | Arrester resistive current tester allowing direct obtaining of voltage signals from high voltage bus |
| CN104655958A (en) * | 2015-01-29 | 2015-05-27 | 杭州申昊科技股份有限公司 | On-line monitoring system for lightning arrester |
| CN105319451A (en) * | 2014-06-25 | 2016-02-10 | 国家电网公司 | Running state detecting method and apparatus of zinc oxide arrester |
| CN105510778A (en) * | 2015-12-01 | 2016-04-20 | 国网四川省电力公司资阳供电公司 | Arrester on-line monitoring terminal device |
| CN112213664A (en) * | 2020-09-29 | 2021-01-12 | 国网陕西省电力公司咸阳供电公司 | Internal monitoring method and system for lightning arrester |
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| CN102841234A (en) * | 2012-09-18 | 2012-12-26 | 辽宁省电力有限公司电力科学研究院 | Non-residual voltage monitoring device for gapless metal oxide lightning arresters and measurement method |
| CN103197169A (en) * | 2013-02-25 | 2013-07-10 | 河海大学常州校区 | Lightning arrester comprehensive performance detection circuit |
| CN105319451A (en) * | 2014-06-25 | 2016-02-10 | 国家电网公司 | Running state detecting method and apparatus of zinc oxide arrester |
| CN105319451B (en) * | 2014-06-25 | 2018-06-05 | 国家电网公司 | The detection method and device of Zinc oxide lightning arrester operation state |
| CN104101767A (en) * | 2014-08-08 | 2014-10-15 | 长沙金艺电子科技有限公司 | Arrester resistive current tester allowing direct obtaining of voltage signals from high voltage bus |
| CN104655958A (en) * | 2015-01-29 | 2015-05-27 | 杭州申昊科技股份有限公司 | On-line monitoring system for lightning arrester |
| CN104655958B (en) * | 2015-01-29 | 2018-08-31 | 杭州申昊科技股份有限公司 | A kind of arrester on-line monitoring system |
| CN105510778A (en) * | 2015-12-01 | 2016-04-20 | 国网四川省电力公司资阳供电公司 | Arrester on-line monitoring terminal device |
| CN112213664A (en) * | 2020-09-29 | 2021-01-12 | 国网陕西省电力公司咸阳供电公司 | Internal monitoring method and system for lightning arrester |
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Application publication date: 20120118 |