CN203191443U - Lightning arrester leakage current on-line monitoring device - Google Patents
Lightning arrester leakage current on-line monitoring device Download PDFInfo
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- CN203191443U CN203191443U CN 201320116812 CN201320116812U CN203191443U CN 203191443 U CN203191443 U CN 203191443U CN 201320116812 CN201320116812 CN 201320116812 CN 201320116812 U CN201320116812 U CN 201320116812U CN 203191443 U CN203191443 U CN 203191443U
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- amplifying circuit
- leakage current
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Abstract
The utility model discloses a lightning arrester leakage current on-line monitoring device, comprising an A-phase current detection module, a B-phase current detection module, a C-phase current detection module, an A-phase amplification circuit, a B-phase amplification circuit, a C-phase amplification circuit, a microprocessor, a display module, an interface module, a power supply module, and a lightning stroke counting circuit. The lightning arrester leakage current on-line monitoring device is capable of monitoring total leakage current of a lightning arrester in real time and monitoring data is accurate and reliable so that the performance state of the lightning arrester can be known in real time; and simultaneously, the monitoring situation of the leakage current is uploaded and an alarm is sent timely when an abnormality is discovered, so that the operation reliability of a power transmission line is increased and the safe operation of the power transmission line is guaranteed.
Description
Technical field
The utility model relates to a kind of leakage current of an arrester on-Line Monitor Device.
Background technology
Lightning arrester is a kind of important overvoltage protection of electric applicance, is undertaking the duplicate protection task that limits lightning surge and switching overvoltage, and its normal operation plays an important role to the safe operation of assurance electrical equipment and the safe power supply of electric system.Traditional lightning arrester is made of discharging gap and silit valve block resistance.20th century 70 are between the eighties; a kind of novel be no gap oxide lightning arrester (the Metal Oxide Surge Arrester of valve block raw material with zinc paste; be called for short MOA) come out; it has superior protective value; and stable performance; ageing resistance is strong, can adapt to severe contamination and high altitude localities, and multiple special requirement such as GIS.MOA has become the main direction of lightning arrester development, and the trend that replaces traditional band gap lightning arrester is gradually arranged.
Zinc oxide valve plate has superior nonlinear characteristic, and resistance is very high under normal working voltage, in fact is equivalent to an insulator, therefore can come isolated working voltage without series gap; Under the superpotential effect, its resistance is very little, and residual voltage is very low.Under the normal working voltage; the electric current that flows through zinc oxide resistance sheet only is microampere order, yet produces deterioration owing to valve block bears the power-frequency voltage effect for a long time, causes that resistance characteristic changes; the leakage current that causes flowing through valve block increases, and causes the lightning arrester insulation characteristic to be destroyed and loses protective effect.In addition, because the own dysplasia of MOA or poorly sealed etc. internals and valve block are made moist or filth etc. also can cause the increase of MOA leakage current in service.In a single day the rapid increase (increases of MOA power) of leaking resistive component in the total current can make the valve block temperature rise and thermal runaway takes place, and when serious even cause the explosion accident of MOA, and the MOA accident takes place, consequence is very serious.Because the MOA decreasing insulating causes that the example of electric power accident is much, cause than the large economy loss both at home and abroad, bring a lot of negative effects, therefore the unfailing performance detection to MOA has become a noticeable problem.For finding in time that MOA makes moist, aging or other hidden danger, avoid accident to take place, need to strengthen quality management on the one hand, improve the MOA product reliability; On the other hand should be often performance and the insulation characterisitic of MOA be detected, eliminate accident potential in order to after noting abnormalities, in time take preventive measures, guarantee that it moves under good state.
Therefore, for guaranteeing safe operation of power system, how to realize operating MOA is made regular check on, its performance state of on-line monitoring is one of those skilled in the art's direction of being devoted to study.
Summary of the invention
The purpose of this utility model, a kind of leakage current of an arrester on-Line Monitor Device to be provided in order addressing the above problem exactly, can to have monitored in real time leakage current of an arrester, and current information is uploaded, note abnormalities and in time report to the police, ensure the safe operation of transmission line of electricity.
The purpose of this utility model is achieved in that
A kind of leakage current of an arrester on-Line Monitor Device of the present utility model, comprise A phase current detection module, B phase current detection module, C phase current detection module, A phase amplifying circuit, B phase amplifying circuit, C phase amplifying circuit, microprocessor, display module, interface module, power module and counting thunder circuit, wherein:
The output terminal of described A phase current detection module is connected with the input end of described A phase amplifying circuit, and the output terminal of described A phase amplifying circuit is connected with the A/D port of described microprocessor;
The output terminal of described B phase current detection module is connected with the input end of described B phase amplifying circuit, and the output terminal of described B phase amplifying circuit is connected with the A/D port of described microprocessor;
The output terminal of described C phase current detection module is connected with the input end of described C phase amplifying circuit, and the output terminal of described C phase amplifying circuit is connected with the A/D port of described microprocessor;
Described display module is connected with the I/O port of described microprocessor;
Described interface module is connected with the serial ports of described microprocessor;
Described power module is connected with the power port of described microprocessor;
Described counting thunder circuit is connected with the I/O port of described microprocessor.
The utility model leakage current of an arrester on-Line Monitor Device can be monitored total leakage current of lightning arrester in real time, and Monitoring Data accurately and reliably, can understand the performance state of lightning arrester thus in real time, again leakage current monitoring situation is uploaded simultaneously, note abnormalities and in time report to the police, improve the transmission line of electricity reliability of operation, ensure the safe operation of transmission line of electricity.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
See also Fig. 1, the utility model leakage current of an arrester on-Line Monitor Device, comprise A phase current detection module 1, B phase current detection module 2, C phase current detection module 3, A phase amplifying circuit 4, B phase amplifying circuit 5, C phase amplifying circuit 6, microprocessor 7, display module 8, interface module 9, power module 10 and counting thunder circuit 11, wherein:
The output terminal of A phase current detection module 1 is connected with the input end of A phase amplifying circuit 4, and the output terminal of A phase amplifying circuit 4 is connected with the A/D port of microprocessor 7;
The output terminal of B phase current detection module 2 is connected with the input end of B phase amplifying circuit 5, and the output terminal of B phase amplifying circuit 5 is connected with the A/D port of microprocessor 7;
The output terminal of C phase current detection module 3 is connected with the input end of C phase amplifying circuit 6, and the output terminal of C phase amplifying circuit 6 is connected with the A/D port of microprocessor 7;
A phase amplifying circuit 4, B phase amplifying circuit 5 and C amplifying circuit 6 mutually all can adopt the integrated transporting discharging with high input impedance.
Microprocessor 7 can be selected low-power scm for use.
Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (1)
1. leakage current of an arrester on-Line Monitor Device, it is characterized in that, described on-Line Monitor Device comprises A phase current detection module, B phase current detection module, C phase current detection module, A phase amplifying circuit, B phase amplifying circuit, C phase amplifying circuit, microprocessor, display module, interface module, power module and counting thunder circuit, wherein:
The output terminal of described A phase current detection module is connected with the input end of described A phase amplifying circuit, and the output terminal of described A phase amplifying circuit is connected with the A/D port of described microprocessor;
The output terminal of described B phase current detection module is connected with the input end of described B phase amplifying circuit, and the output terminal of described B phase amplifying circuit is connected with the A/D port of described microprocessor;
The output terminal of described C phase current detection module is connected with the input end of described C phase amplifying circuit, and the output terminal of described C phase amplifying circuit is connected with the A/D port of described microprocessor;
Described display module is connected with the I/O port of described microprocessor;
Described interface module is connected with the serial ports of described microprocessor;
Described power module is connected with the power port of described microprocessor;
Described counting thunder circuit is connected with the I/O port of described microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320116812 CN203191443U (en) | 2013-03-14 | 2013-03-14 | Lightning arrester leakage current on-line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320116812 CN203191443U (en) | 2013-03-14 | 2013-03-14 | Lightning arrester leakage current on-line monitoring device |
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| Publication Number | Publication Date |
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| CN203191443U true CN203191443U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320116812 Expired - Lifetime CN203191443U (en) | 2013-03-14 | 2013-03-14 | Lightning arrester leakage current on-line monitoring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777064A (en) * | 2014-01-23 | 2014-05-07 | 国家电网公司 | Zinc oxide arrester live detection device free of external connection with alternating-current power supply |
| CN104777444A (en) * | 2015-04-14 | 2015-07-15 | 国网辽宁省电力有限公司抚顺供电公司 | Lightning arrester discharge counter comprehensive calibration instrument and calibration method |
| CN105021880A (en) * | 2015-07-15 | 2015-11-04 | 国家电网公司 | Lightning arrester leakage current online monitoring and alarm device |
-
2013
- 2013-03-14 CN CN 201320116812 patent/CN203191443U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777064A (en) * | 2014-01-23 | 2014-05-07 | 国家电网公司 | Zinc oxide arrester live detection device free of external connection with alternating-current power supply |
| CN104777444A (en) * | 2015-04-14 | 2015-07-15 | 国网辽宁省电力有限公司抚顺供电公司 | Lightning arrester discharge counter comprehensive calibration instrument and calibration method |
| CN104777444B (en) * | 2015-04-14 | 2018-04-06 | 国网辽宁省电力有限公司抚顺供电公司 | Arrester discharge counter comprehensive calibrator and method of calibration |
| CN105021880A (en) * | 2015-07-15 | 2015-11-04 | 国家电网公司 | Lightning arrester leakage current online monitoring and alarm device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130911 |
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| CX01 | Expiry of patent term |