CN206627564U - A kind of grounding circulation on-line monitoring system - Google Patents
A kind of grounding circulation on-line monitoring system Download PDFInfo
- Publication number
- CN206627564U CN206627564U CN201621492009.XU CN201621492009U CN206627564U CN 206627564 U CN206627564 U CN 206627564U CN 201621492009 U CN201621492009 U CN 201621492009U CN 206627564 U CN206627564 U CN 206627564U
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- ground wire
- line monitoring
- optical cable
- monitoring system
- transformer
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Abstract
The utility model discloses a kind of grounding circulation on-line monitoring system, including optical cable to be measured and ground wire current monitoring transformer, protective metal shell is installed on the outside of the optical cable to be measured, it is directly grounded after the three-phase interconnection of the protective metal shell both ends by ground wire, the ground wire current monitoring transformer is connected on ground wire by signal 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.It can accurately and timely understand the state of insulation of electric power optical cable, drastically reduce the area workload and the spending of regular maintenance.The longtime running of on-line monitoring will accumulate the historical data of preciousness simultaneously, and carrying out system evaluation to grid power transmission circuit to work of electric power system personnel provides data resource.
Description
Technical field
Optical cable detection technique field is the utility model is related to, 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 optical cable of early stage laying has arrived the normal use time limit successively now,
The Insulation Problems of optical cable will increasingly increase, and the working environment of electric power optical cable is complicated, and maintenance is got 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, the utility model provides a kind of energy and accurately and timely understands electric power light
The state of insulation of cable, it drastically reduce the area workload and the spending of regular maintenance.The longtime running of on-line monitoring will tire out simultaneously
The valuable historical data of product, system evaluation offer data resource is provided to work of electric power system personnel to grid power transmission circuit and connect
Ground circulation on-line monitoring system.
The purpose of this utility model 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
Protective metal shell is installed on the outside of optical cable, is directly grounded after the interconnection of protective metal shell both ends three-phase by ground wire, the ground connection
Line current monitoring transformer is connected on ground wire by signal wire, the ground wire current monitoring transformer output 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 unidirectionally connects, 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 utility model has the advantage of：The utility model can be accurate and timely understands electric power
The state of insulation of optical cable, it drastically reduce the area workload and the spending of regular maintenance.The longtime running of on-line monitoring will simultaneously
Valuable historical data is accumulated, carrying out system evaluation to grid power transmission circuit to work of electric power system personnel provides data resource.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
With reference to Figure of description and specific embodiment, the utility model 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
Unite in the case of internal overvoltage or Lightning Over-voltage, induced potential is particularly acute.Therefore, optical cable protective metal shell must correctly connect
Ground, being limited in optical cable protective metal shell using the earth is allowed on earthing potential.More than 66KV electric power optical cables are mostly single fiber cable, are applied
If if when the interconnection of protective metal shell both ends three-phases after be directly grounded, when core passes through electric current, due to the electromagnetic induction of conductor current,
Caused induced voltage causes occur sensing circulation on protective metal shell 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 dramatically increases, up to principal current when serious
More than 90%.Monitoring protective metal shell circulation and its variable quantity in real time, 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
Protective metal shell is installed on the outside of optical cable, is directly grounded after the interconnection of protective metal shell both ends three-phase by ground wire, the ground connection
Line current monitoring transformer is connected on ground wire by signal 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
Manage the analog signal that circuit receives the transformer output of ground wire current monitoring, the signal conditioning circuit to A/D analog-to-digital conversion moulds
Block unidirectionally connects, 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.
It is grounded current monitoring transformer and is mainly responsible for collection earth current signal, input 0-3000A AC can be selected, it is defeated
Go out RMS4-20mA DC or input 0-200A AC, 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 is sampled, and sampling rate is 3000 times/second, and 4 channel cycles measure.By the way of waterproof cabinet, circuit board is all arranged on
In interior cabinet, securely and reliably.
GPRS communicates (or optical-fibre communications) network：The payment net that GPRS communications are mainly provided using cellular carrier (movement)
Network, the communication channel established by the network of operator between the intensive data collector at backstage and scene, wireless network need
The SIM card that operator or power department provide is supported；(optical-fibre communications is using light wave as information carrier, and transmission is used as using optical fiber
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
Protective metal shell is installed on the outside of the optical cable to be measured, is directly grounded after the interconnection of protective metal shell both ends three-phase by ground wire,
The ground wire current monitoring transformer is connected on ground wire by signal 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.
A kind of 2. 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 unidirectionally connect, 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.
A kind of 4. 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 |
|---|---|---|---|
| CN201621492009.XU CN206627564U (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 |
|---|---|---|---|
| CN201621492009.XU CN206627564U (en) | 2016-12-30 | 2016-12-30 | A kind of grounding circulation on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206627564U true CN206627564U (en) | 2017-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621492009.XU Active CN206627564U (en) | 2016-12-30 | 2016-12-30 | A kind of grounding circulation on-line monitoring system |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841765A (en) * | 2016-12-30 | 2017-06-13 | 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 CN201621492009.XU patent/CN206627564U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841765A (en) * | 2016-12-30 | 2017-06-13 | 江苏骏龙光电科技股份有限公司 | A kind of grounding circulation on-line monitoring system |
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