CN106841765A - A kind of grounding circulation on-line monitoring system - Google Patents
A kind of grounding circulation on-line monitoring system Download PDFInfo
- Publication number
- CN106841765A CN106841765A CN201611270827.XA CN201611270827A CN106841765A CN 106841765 A CN106841765 A CN 106841765A CN 201611270827 A CN201611270827 A CN 201611270827A CN 106841765 A CN106841765 A CN 106841765A
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- CN
- China
- Prior art keywords
- ground wire
- line monitoring
- optical cable
- monitoring system
- current monitoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of grounding circulation on-line monitoring system, including optical cable to be measured and ground wire current monitoring transformer, the optical cable outside to be measured is provided with protective metal shell, it is directly grounded by ground wire after the three-phase interconnection of the protective metal shell two ends, the ground wire current monitoring transformer is connected on ground wire by holding wire, the ground wire current monitoring transformer exports analog signal to intensive data collector, is bi-directionally connected between the intensive data collector and communication module.The state of insulation of electric power optical cable be can accurate and timely understand, workload and the spending of regular maintenance drastically reduce the area.The longtime running of on-line monitoring will accumulate the historical data of preciousness simultaneously, and system evaluation is carried out to grid power transmission circuit to work of electric power system personnel provides data resource.
Description
Technical field
The present invention relates to optical cable detection technique field, particularly a kind of grounding circulation on-line monitoring system.
Background technology
With the high speed development of power grid construction, the use of electric power optical cable is more and more extensive, the performance monitoring to newly-built optical cable
The demand collected with historical data will be more and more.Meanwhile, the early stage optical cable of laying has arrived normal service life successively now,
The Insulation Problems of optical cable will increasingly increase, and the working environment of electric power optical cable is complicated, and maintenance gets up considerably complicated, and regular maintenance is opened
Zhi Ju great.Therefore power system needs a set of perfect properties of optical fiber cable monitoring system.
The content of the invention
For problems of the prior art, electric power optical cable accurately and is timely understood the invention provides a kind of energy
State of insulation, drastically reduce the area workload and the spending of regular maintenance.The longtime running of on-line monitoring will accumulate treasured simultaneously
Expensive historical data, the ground loop that system evaluation provides data resource is carried out to grid power transmission circuit to work of electric power system personnel
Stream on-line monitoring system.
The purpose of the present invention is achieved through the following technical solutions.
A kind of grounding circulation on-line monitoring system, including optical cable to be measured and ground wire current monitoring transformer, it is described to be measured
Optical cable outside is provided with protective metal shell, is directly grounded by ground wire after the interconnection of protective metal shell two ends three-phase, the ground connection
Line current monitoring transformer is connected on ground wire by holding wire, and the ground wire current monitoring transformer exports analog signal
To intensive data collector, it is bi-directionally connected between the intensive data collector and communication module.
Further, the intensive data collector includes signal conditioning circuit, A/D analog-to-digital conversion modules and single-chip microcomputer,
The signal conditioning circuit receives the analog signal of ground wire current monitoring transformer output, the signal conditioning circuit to A/D
Analog-to-digital conversion module is unidirectionally connected, and is bi-directionally connected between the A/D analog-to-digital conversion modules and single-chip microcomputer.
Further, memory module has been bi-directionally connected it on the single-chip microcomputer.
Further, the outputting standard of the ground wire current monitoring transformer is 4-20mA.
Further, the communication module is fiber optic telecommunications module and/or wireless communication module.
Compared to prior art, the advantage of the invention is that：It is of the invention accurate and timely to understand the exhausted of electric power optical cable
Edge state, drastically reduce the area workload and the spending of regular maintenance.The longtime running of on-line monitoring will accumulate preciousness simultaneously
Historical data, to work of electric power system personnel grid power transmission circuit is carried out system evaluation provide data resource.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Specific embodiment
With reference to Figure of description and specific embodiment, the present invention is described in detail.
Under normal circumstances, because being interlinked with cable core there is certain induced potential in optical cable protective metal shell, in accident and be
In the case of system internal overvoltage or Lightning Over-voltage, induced potential is particularly acute.Therefore, optical cable protective metal shell must correctly connect
, be limited in optical cable protective metal shell on permission earthing potential using the earth by ground.More than 66KV electric power optical cables are generally single fiber cable, are applied
If if when the interconnection of protective metal shell two ends three-phases after be directly grounded, when core passes through electric current, due to the electromagnetic induction of conductor current,
The induced voltage produced on protective metal shell causes occur sensing circulation on protective metal shell.The system employs ring current method principle,
I.e.：Under normal circumstances (i.e. one point earth), circulation is minimum on protective metal shell for single fiber cable protective metal shell, mainly capacitive electricity
Stream, and after protective metal shell multipoint earthing occurs and greatly forms loop, circulation is dramatically increased, up to principal current when serious
More than 90%.Real-time monitoring protective metal shell circulation and its variable quantity, you can realize single fiber cable protective metal shell multipoint earth faults
On-line monitoring.
A kind of grounding circulation on-line monitoring system, including optical cable to be measured and ground wire current monitoring transformer, it is described to be measured
Optical cable outside is provided with protective metal shell, is directly grounded by ground wire after the interconnection of protective metal shell two ends three-phase, the ground connection
Line current monitoring transformer is connected on ground wire by holding wire, as shown in figure 1, the ground wire current monitoring transformer is defeated
Go out analog signal to intensive data collector, be bi-directionally connected between the intensive data collector and communication module.
The intensive data collector includes signal conditioning circuit, A/D analog-to-digital conversion modules and single-chip microcomputer, and the signal is adjusted
Reason circuit receives the analog signal of ground wire current monitoring transformer output, the signal conditioning circuit to A/D analog-to-digital conversion moulds
Block is unidirectionally connected, and is bi-directionally connected between the A/D analog-to-digital conversion modules and single-chip microcomputer.Storage has been bi-directionally connected on the single-chip microcomputer
Module.The outputting standard of the ground wire current monitoring transformer is 4-20mA.The communication module be fiber optic telecommunications module and/
Or wireless communication module.
Ground wire current monitoring transformer is mainly responsible for collection earth current signal, can select input 0-3000AAC, output
RMS4-20mA DC or input 0-200AAC, output 4-20mA DC.
A total of 4 acquisition channels of intensive data collector, each passage can connect the sensor of different ranges, built-in 16
AD samples, and sampling rate is 3000 times/second, the measurement of 4 channel cycles.By the way of waterproof cabinet, circuit board is all arranged on
It is safe and reliable in interior cabinet.
GPRS communicates (or optical-fibre communications) network：The main paying net provided using cellular carrier (movement) of GPRS communications
Network, the communication channel set up between backstage and the intensive data collector at scene by the network of operator, wireless network is needed
The SIM that operator or power department are provided is supported；(optical-fibre communications is using light wave as information carrier, using optical fiber as transmission
A kind of communication mode of medium, message capacity is big, long transmission distance, strong antijamming capability).
Claims (5)
1. a kind of grounding circulation on-line monitoring system, including optical cable to be measured and ground wire current monitoring transformer, it is characterised in that
The optical cable outside to be measured is provided with protective metal shell, is directly grounded by ground wire after the interconnection of protective metal shell two ends three-phase,
The ground wire current monitoring transformer is connected on ground wire by holding wire, the ground wire current monitoring transformer output
Analog signal is bi-directionally connected to intensive data collector between the intensive data collector and communication module.
2. a kind of grounding circulation on-line monitoring system according to claim 1, it is characterised in that the intensive data collection
Device includes signal conditioning circuit, A/D analog-to-digital conversion modules and single-chip microcomputer, and the signal conditioning circuit receives ground wire current monitoring
The analog signal of transformer output, the signal conditioning circuit to A/D analog-to-digital conversion modules is unidirectionally connected, and the A/D moduluses turn
It is bi-directionally connected between mold changing block and single-chip microcomputer.
3. a kind of grounding circulation on-line monitoring system according to claim 2, it is characterised in that two-way on the single-chip microcomputer
It is connected with memory module.
4. a kind of grounding circulation on-line monitoring system according to claim 1, it is characterised in that the ground connection line current prison
The outputting standard for surveying transformer is 4-20mA.
5. a kind of grounding circulation on-line monitoring system according to claim 1, it is characterised in that the communication module is light
Fiber communication module and/or wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611270827.XA CN106841765A (en) | 2016-12-30 | 2016-12-30 | A kind of grounding circulation on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611270827.XA CN106841765A (en) | 2016-12-30 | 2016-12-30 | A kind of grounding circulation on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106841765A true CN106841765A (en) | 2017-06-13 |
Family
ID=59116962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611270827.XA Pending CN106841765A (en) | 2016-12-30 | 2016-12-30 | A kind of grounding circulation on-line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106841765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337727A (en) * | 2020-03-05 | 2020-06-26 | 山东泰开互感器有限公司 | Current transformer and cloud computing-based current transformer information interaction system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445633A (en) * | 2015-12-24 | 2016-03-30 | 浙江中电智能科技有限公司 | High-voltage cable protective layer loop current multi-state monitoring device |
| CN206627564U (en) * | 2016-12-30 | 2017-11-10 | 江苏骏龙光电科技股份有限公司 | A kind of grounding circulation on-line monitoring system |
-
2016
- 2016-12-30 CN CN201611270827.XA patent/CN106841765A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445633A (en) * | 2015-12-24 | 2016-03-30 | 浙江中电智能科技有限公司 | High-voltage cable protective layer loop current multi-state monitoring device |
| CN206627564U (en) * | 2016-12-30 | 2017-11-10 | 江苏骏龙光电科技股份有限公司 | A kind of grounding circulation on-line monitoring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337727A (en) * | 2020-03-05 | 2020-06-26 | 山东泰开互感器有限公司 | Current transformer and cloud computing-based current transformer information interaction system |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170613 |
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| WD01 | Invention patent application deemed withdrawn after publication |