CN109238318A - A kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing - Google Patents
A kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing Download PDFInfo
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- CN109238318A CN109238318A CN201710561742.5A CN201710561742A CN109238318A CN 109238318 A CN109238318 A CN 109238318A CN 201710561742 A CN201710561742 A CN 201710561742A CN 109238318 A CN109238318 A CN 109238318A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 67
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 230000005611 electricity Effects 0.000 title claims abstract description 18
- RRVPPYNAZJRZFR-VYOBOKEXSA-N 1-oleoyl-2-palmitoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)O[C@@H](COP([O-])(=O)OCC[N+](C)(C)C)COC(=O)CCCCCCC\C=C/CCCCCCCC RRVPPYNAZJRZFR-VYOBOKEXSA-N 0.000 claims abstract 2
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 230000002708 enhancing effect Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000000149 argon plasma sintering Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 102100020786 Adenylosuccinate synthetase isozyme 2 Human genes 0.000 description 1
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- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000253 optical time-domain reflectometry Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
Abstract
The present invention relates to electric power monitoring technical fields, the multi-parameter integrated monitoring system of specifically a kind of transmission line of electricity based on distributing optical fiber sensing, it is characterized by: the input terminal of the output end connection polarizing coupler of laser, the output end of polarizing coupler divides two-way to be separately connected the input terminal of the first electrooptic modulator and the input terminal of the second electrooptic modulator, the output end of first electrooptic modulator is sequentially connected the first image intensifer, the first port of circulator, the second port of circulator connects one end of any one optical fiber, the other end of same root optical fiber connects the output end of the second electrooptic modulator；The third port of circulator is sequentially connected the input terminal of the second image intensifer, filter, detector, and the output end of detector is sequentially connected processor and host.Compared with prior art, the present invention realizing using OPGW/OPPC optical fiber as sensor and destroying the comprehensive real-time monitoring such as stranded to the mountain fire of route, icing, ice-melt and external force.
Description
Technical field
The present invention relates to electric power monitoring technical field, specifically a kind of transmission line of electricity based on distributing optical fiber sensing
Multi-parameter integrated monitoring system.
Background technique
In transmission line of electricity, optical fiber composite overhead ground wire (OPGW) and optical phase conductor (OPPC) are with higher
The distinguishing features such as reliability, superior mechanical performance, cost be relatively low, the optical cable in OPGW/OPPC are used as communication, and anti-electromagnetism is dry
It disturbs, be not easy by the advantages such as artificial destruction, long service life, operation and maintenance cost be low, it is dry in China's communication of power system in recent years
It is widely applied in transmission network.But OPGW/OPPC is in the presence of a harsh environment, be easy by mountain fire, icing, ice-melt and
External force destroys stranded equal influence, once ground wire function or optical fiber communication function are lost, it will jeopardize the safe and stable operation of power grid.
Therefore, comprehensive real-time monitoring is carried out to OPGW/OPPC operating status, discovery in time, exclusion hidden danger are particularly important.
Current transmission line of electricity monitoring means such as monitors the heat detector of mountain fire, monitors weighing/pull sensing of icing
Device, the electronic temperature transmitter for monitoring ice-melt and monitoring external force destroy stranded crusing robot etc., these methods all exist
Many deficiencies, and most of is to measure to single parameter, however in many practical applications generally require to measure whole
The mountain fire of a transmission line of electricity or line corridor, icing, ice-melt and external force destroy the parameter distribution information of the multidimensional problems such as stranded.
Distributed optical fiber sensing system is a kind of sensing for using optical fibers as sensing responsive element and transmitting signal media
System.Its working principle is that sensing responsive element and transmission signal media are used optical fibers as simultaneously, using advanced OTDR skill
Art detects the temperature along optical fiber different location and the variation of strain, realizes really distributed measurement.
Summary of the invention
The purpose of the present invention is overcome the deficiencies in the prior art, using Distributed Optical Fiber Sensing Techniques, with OPGW or OPPC
In optical fiber as sensing media, realization destroys stranded etc. on-line monitoring to mountain fire, icing, ice-melt and external force, realizes transmission of electricity
Route many reference amounts monitor all standing, have important practical significance to the O&M level for improving power grid.
To achieve the above object, a kind of multi-parameter integrated monitoring system of the transmission line of electricity based on distributing optical fiber sensing is designed
System, including distributed optical fiber sensing system, it is characterised in that:
The distributed optical fiber sensing system includes laser, polarizing coupler, the first, second electrooptic modulator,
One, the second image intensifer, circulator, filter, detector, mountain fire signal processor, icing signal processor, at ice-melt signal
Reason device, external force destroy stranded signal processor and the host equipped with display；
The input terminal of the output end connection polarizing coupler of the laser, the output end of polarizing coupler divide two-way point
Do not connect the input terminal of the first electrooptic modulator and the input terminal of the second electrooptic modulator, the output end of the first electrooptic modulator according to
The first port of the first image intensifer of secondary connection, circulator, the second port of circulator connect one end of any one optical fiber, together
The other end of a piece optical fiber connects the output end of the second electrooptic modulator；The third port of circulator is sequentially connected the second light amplification
Device, filter, detector input terminal, four tunnels of the output end of detector point are separately connected mountain fire signal processor, icing signal
Processor, ice-melt signal processor, external force destroy the input terminal of stranded signal processor, mountain fire signal processor, icing signal
Processor, ice-melt signal processor, external force destroy the output end connection host of stranded signal processor；The optical fiber is OPGW
Optical fiber or OPPC optical fiber；
The laser issues continuous light to polarizing coupler, and it is defeated that polarizing coupler splits the light into two paths of signals difference
Out to the first, second electrooptic modulator, wherein the first electrooptic modulator is optical signal modulation at pump light, the second electrooptic modulator
Optical signal modulation at continuous light；Pump light enters circulator by the first image intensifer, then enters from any one optical fiber,
The upstream end is optical fiber initial end, and pump light constantly generates back-scattering light in optical fiber, and continuous light is from same root optical fiber
End enters to form detection light, and pump light and detection light meet in a fiber, when pump light and continuous detection light frequency difference and
When scattering optical frequency shift is equal, light scattering enlarge-effect will be generated in the region, energy transfer occurs between two-beam, realizes back
Enhancing to scattered signal；The signal of the enhancing is exported from the initial end of optical fiber, enters second by the third port of circulator
Image intensifer, then enters detector through filter, and last signal is respectively fed to mountain fire signal processor, icing signal processing
Device, ice-melt signal processor and external force destroy stranded signal processor and carry out information process analysis, are ultimately routed on host, and
It is shown by the display being connected on host.
The laser is narrow linewidth laser, line width < 5kHz, 50~200mW of power.
The pulse width of the pump light is generally 20~60ns.
The filter bandpass filter, isolation are greater than 60dB.
The detector uses APD detector.
The host is mounted in substation's computer room.
Compared with prior art, the present invention structure is simple, wherein a core is spare for host and the OPGW/OPPC route of monitoring
Optical fiber is connected, and using the core fibre as sensor, does not need to install additional sensors on the line, OPGW/OPPC can be realized
Mountain fire, icing, ice-melt and the external force of route destroy the comprehensive real-time monitoring such as stranded；Compared to existing point type electronic sensor
Monitoring mode, the present apparatus is more difficult to be influenced by outside environmental elements, has better detection accuracy.
Detailed description of the invention
Fig. 1 is connection schematic diagram of the invention.
Specific embodiment
The present invention is further described now in conjunction with accompanying drawings and embodiments.
Embodiment 1
Referring to Fig. 1, the multi-parameter integrated monitoring system of a kind of transmission line of electricity based on distributing optical fiber sensing in the present invention, packet
Include distributed optical fiber sensing system, it is characterised in that:
The distributed optical fiber sensing system includes laser, polarizing coupler, the first, second electrooptic modulator,
One, the second image intensifer, circulator 1, filter, detector, mountain fire signal processor, icing signal processor, ice-melt signal
Processor, external force destroy stranded signal processor and the host equipped with display；
The input terminal of the output end connection polarizing coupler of the laser, the output end of polarizing coupler divide two-way point
Do not connect the input terminal of the first electrooptic modulator and the input terminal of the second electrooptic modulator, the output end of the first electrooptic modulator according to
The first port of the first image intensifer of secondary connection, circulator, the second port of circulator connect one end of any one optical fiber, together
The other end of a piece optical fiber connects the output end of the second electrooptic modulator；The third port of circulator is sequentially connected the second light amplification
Device, filter, detector input terminal, four tunnels of the output end of detector point are separately connected mountain fire signal processor, icing signal
Processor, ice-melt signal processor, external force destroy the input terminal of stranded signal processor, mountain fire signal processor, icing signal
Processor, ice-melt signal processor, external force destroy the output end connection host of stranded signal processor；The optical fiber is OPGW
Optical fiber or OPPC optical fiber；
The laser issues continuous light to polarizing coupler, and it is defeated that polarizing coupler splits the light into two paths of signals difference
Out to the first, second electrooptic modulator, wherein the first electrooptic modulator is optical signal modulation at pump light, the second electrooptic modulator
Optical signal modulation at continuous light；Pump light enters circulator 1 by the first image intensifer, then from any one optical fiber into
Enter, which is optical fiber initial end, and pump light constantly generates back-scattering light in optical fiber, and continuous light is from same root optical fiber
End enter to form detection light, pump light and detection light meet in a fiber, when the frequency difference of pump light and continuous detection light
When equal with scattering optical frequency shift, light scattering enlarge-effect will be generated in the region, energy transfer occurs between two-beam, realizes
The enhancing of backscatter signals；The signal of the enhancing is exported from the initial end of optical fiber, enters the by the third port of circulator
Two image intensifers, then enter detector through filter, and last signal is respectively fed to mountain fire signal processor, icing signal processing
Device, ice-melt signal processor and external force destroy stranded signal processor and carry out information process analysis, are ultimately routed on host, and
It is shown by the display being connected on host.
Further, the laser is narrow linewidth laser, line width < 5kHz, 50~200mW of power.
Further, the pulse width of the pump light is generally 20~60ns.
Further, the filter bandpass filter, isolation are greater than 60dB.
Further, the detector uses APD detector.
Further, the host is mounted in substation's computer room.
Mountain fire signal processor, icing signal processor, ice-melt signal processor and external force destroy stranded signal processor
Main function is to show the spectral characteristic of input signal, is capable of measuring signal distortion, percentage modulation spectral purity, passes through host
The data received, and these data are in when mountain fire, icing, ice-melt or external force destroy stranded with the expression being previously set
Threshold range is compared, so which kind of state optical fiber is in instantly for judgement.
Mountain fire signal processor, icing signal processor, ice-melt signal processor and external force destroy stranded letter in the present invention
Number processor carries out identifying processing to the data of monitoring analysis, judges whether route meets with mountain fire, icing, ice-melt or external force and destroy
Stranded, principle based on calculating is as follows:
Mountain fire is monitored, the intensity of the back-scattering light in optical fiber has been modulated in the temperature field of spatial points locating for optical fiber,
The thermal expansion effects in optical fiber can be caused when the temperature on optical fiber changes, so that density of optic fibre and optical fibre refractivity be made to send out
Changing, and then cause the change for scattering optical frequency shift.It is big referring to " cable temperature monitoring based on BOTDA technology " Shanghai maritime affairs
It learns, Zhong Lina et al..
Icing is monitored, icing can make optical cable elongation that arc sag be caused to increase, and cause the variation of fibre strain.Therefore, may be used
To realize the early warning and alarm to icing by monitoring fibre strain.The change of fibre strain will cause changing for scattering optical frequency shift
Become, by detecting the light intensity of each scattering light, can know the icing information along optical fiber.Referring to paper " based on BOTDA's
The technical research of ADSS fiber optic cable monitor " North China Electric Power University, Li Yongqian etc.；And " BOTDA technology is monitored on-line in power grid heavy icing area
In application " Zhaotong power supply bureau of Yunnan Power System Co., Ltd, Xiong Wen is virtuous etc..And the principle of ice-melt is the same as icing principle basic one
It causes, only icing is the process that icing thickness increases, and ice-melt is reduced process.
Stranded monitoring is destroyed for external force, the stranded missing that will lead to scattered light signal, system is by collected backwards to auspicious
Sharp scattered signal is sampled collection according to its time, differentiation in different regions and optical power change situation for reaching, and then determination is stranded
Position.Referring to paper " high voltage electricity transmission conductive wire based on O T D R technology stranded and damage check ", Shanghai Electric Power Co electricity
Power research institute.
Claims (6)
1. a kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing, including distributing optical fiber sensing system
System, it is characterised in that:
The distributed optical fiber sensing system includes laser, polarizing coupler, the first, second electrooptic modulator, first,
Two image intensifers, circulator (1), filter, detector, mountain fire signal processor, icing signal processor, ice-melt signal processing
Device, external force destroy stranded signal processor and the host equipped with display；
The input terminal of the output end connection polarizing coupler of the laser, the output end of polarizing coupler divide two-way to connect respectively
The input terminal of the first electrooptic modulator and the input terminal of the second electrooptic modulator are connect, the output end of the first electrooptic modulator successively connects
The first port of the first image intensifer, circulator is connect, the second port of circulator connects one end of any one optical fiber, same root
The other end of optical fiber connects the output end of the second electrooptic modulator；The third port of circulator be sequentially connected the second image intensifer,
Four tunnels of output end point of the input terminal of filter, detector, detector are separately connected mountain fire signal processor, icing signal processing
Device, ice-melt signal processor, external force destroy the input terminal of stranded signal processor, mountain fire signal processor, icing signal processing
Device, ice-melt signal processor, external force destroy the output end connection host of stranded signal processor；The optical fiber is OPGW optical fiber
Or OPPC optical fiber；
The laser issues continuous light to polarizing coupler, polarizing coupler split the light into two paths of signals export respectively to
First, second electrooptic modulator, wherein the first electrooptic modulator optical signal modulation at pump light, the second electrooptic modulator is light
Signal modulation is at continuous light；Pump light enters circulator (1) by the first image intensifer, then enters from any one optical fiber,
The upstream end is optical fiber initial end, and pump light constantly generates back-scattering light in optical fiber, and continuous light is from same root optical fiber
End enters to form detection light, and pump light and detection light meet in a fiber, when pump light and continuous detection light frequency difference and
When scattering optical frequency shift is equal, light scattering enlarge-effect will be generated in the region, energy transfer occurs between two-beam, realizes back
Enhancing to scattered signal；The signal of the enhancing is exported from the initial end of optical fiber, enters second by the third port of circulator
Image intensifer, then enters detector through filter, and last signal is respectively fed to mountain fire signal processor, icing signal processing
Device, ice-melt signal processor and external force destroy stranded signal processor and carry out information process analysis, are ultimately routed on host, and
It is shown by the display being connected on host.
2. a kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing as described in claim 1,
Be characterized in that: the laser is narrow linewidth laser, line width < 5kHz, 50~200mW of power.
3. a kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing as described in claim 1,
Be characterized in that: the pulse width of the pump light is generally 20~60ns.
4. a kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing as described in claim 1,
Be characterized in that: the filter bandpass filter, isolation are greater than 60dB.
5. a kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing as described in claim 1,
Be characterized in that: the detector uses APD detector.
6. a kind of multi-parameter integrated monitoring system of transmission line of electricity based on distributing optical fiber sensing as described in claim 1,
Be characterized in that: the host is mounted in substation's computer room.
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Cited By (1)
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| CN113552505A (en) * | 2021-06-24 | 2021-10-26 | 广东电网有限责任公司 | Monitoring device for OPGW strand breakage degree |
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Application publication date: 20190118 |