CN102840928A - Online temperature monitoring system and monitoring method for optical fiber composition phase conductor (OPPC) - Google Patents
Online temperature monitoring system and monitoring method for optical fiber composition phase conductor (OPPC) Download PDFInfo
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- CN102840928A CN102840928A CN2012103006871A CN201210300687A CN102840928A CN 102840928 A CN102840928 A CN 102840928A CN 2012103006871 A CN2012103006871 A CN 2012103006871A CN 201210300687 A CN201210300687 A CN 201210300687A CN 102840928 A CN102840928 A CN 102840928A
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Abstract
The invention relates to an online temperature monitoring system and a monitoring method for an optical fiber composition phase conductor (OPPC). The monitoring system comprises an OPPC optical cable (1), an optical unit (2), an optical cable connector box (3), an imported optical cable (4), a temperature measurement host (5) and a monitoring computer (6). The OPPC optical cable (1), the optical unit (2), the optical cable connector box (3), the imported optical cable (4) and the temperature measurement host (5) are connected in sequence. The monitoring computer (6) is connected with the temperature measurement host (5). The technical scheme of the online temperature monitoring system and the monitoring method for the OPPC is used to carry out real-time partition monitoring for temperature of an operating OPPC cable and provides accurate temperature data for applications of fault early warning of transmission lines, dynamic capacity increasing, and the like.
Description
Technical field
The present invention relates to a kind of monitoring system and monitoring method thereof, be specifically related to a kind of on-line temperature monitoring system and monitoring method thereof that is used for OPPC.
Background technology
The load of high-tension cable is big, and thermal value is high, and its surface temperature can reflect the practical operation situation of cable more really, like running overload, cable line insulation fault etc.Based on temperature information circuit being carried out on-line operation and monitor in real time, is to realize cable maintenance repair and maintenance, cable fault early warning and diagnosis, line accident investigation and emergent important means.Simultaneously, through cable temperature, in conjunction with the sensing data of sunshine, environment temperature and wind-force etc., but Accurate Analysis is calculated the maximum permission current-carrying capacity of cable, for the reasonable disposition load provides the science data foundation.
OPPC (OPPC) is a kind of new special optical cable that in traditional phase line structure, embeds fiber unit, and it has made full use of the line resource of electric system self, has the dual-use function of electric energy transmitting and communication service.In the existing electrical network of China; The transmission line of electricity electric current generally all adopts the three-phase electrical power system transmission; Substitute the phase in the three-phase with OPPC; Formation is by two leads and the three-phase electrical power system that OPPC combines, and do not need other building communication lines just can solve the problem such as robotization, scheduling, protection of electrical network.Therefore, the OPPC technology provides another kind of power communication solution.The OPPC optical cable makes full use of the peculiar resource (transmission line of electricity, shaft tower etc.) of electric system; With the construction that is closely linked of power network shelf structure; Speed of application is fast, and the duration is short, adopts the OPPC optical cable can optimize the transmission line of electricity design; Can make full use of the transmission line of electricity resource, avoid in aspects such as frequency resource, route coordination, electromagnetic compatibility, short circuit, thunderbolt and extraneous contradiction; The construction of OPPC optical cable can not increase added burden to transmission line of electricity, has reduced the possibility of artificial destruction.Because OPPC adopts the big good conductor made in cross section, the short-circuit current ratio OPGW optical cable that can bear is big in addition; Not necessarily in the top of shaft tower,, the disconnected core that causes by thunderbolt as OPGW, disconnected strand accident have been avoided when OPPC installs simultaneously so do not subject to thunderbolt.City net, the rural power grids circuit of 110kV and following electric pressure do not have aerial earth wire, and this electrical network aerial condutor has been pressed design selected to the routine distance on ground.Can not consider the requirement of optical fiber communication when building in the past, when setting up ADSS now, safe distance is not enough over the ground, and the hanging point distance is higher, has only the OPPC of selection the most suitable.For the transmission line of electricity of voltage levels, OPPC still has the space and the possibility of application, and application example has abroad been arranged.
High-tension cable comprises that the on-line temperature monitoring of cable and aerial condutor disperses to install various contacts and non-contacting sensor usually at present, uses the wireless communication technology transmission signals.It is on-the-spot because problems such as power supply, insulation, communications are difficult for enforcement.Patent of the present invention is according to transmission line of electricity state on_line monitoring demand, and the OPPC application, in conjunction with Raman scattering distributing optical fiber sensing know-why, designs a kind of OPPC (OPPC) on-line temperature monitoring method and system that is used for.The present invention combines OPPC and transmission line of electricity status monitoring application demand, realizes transmission of electricity, thermometric, three kinds of functions of communication.Promote the intelligent degree of transmission system.
Relevant Chinese patent ZL200920289025.2 stress-strain measurement device that is applied to OPPC OPPC; The BOTDR of distribution type fiber-optic system, supervisory control comuter, conduction optical fiber and connector box thereof and OPPC OPPC by based on Brillouin scattering form, and can accomplish OPPC ess-strain abnormity point is monitored; Relevant Chinese patent ZL200910175452 temperature-measuring system of distributed fibers; Invention comprises singlechip control panel, fiber optic temperature field information acquisition module, photodetector and circuit signal post-processing module; Temperature monitoring can be accomplished, the OPPC temperature monitoring can not be realized temperature measuring optical cable.Chinese patent ZL201110007053.2 is based on the current-carrying capacity of cable monitoring method and the system of distributed optical fiber temperature measurement method, and thermometric optical fiber directly contacts cable surface, and the measuring method of use can not be used for the OPPC temperature monitoring.U.S. Pat 7412117 (PCT/GB2004/004383) Apparatus and method for distributed temperature sensing; Do not consider OPPC complex circuit heat conduction characteristics, do not consider the property of aerial optical cable multipoint connection.
Summary of the invention
Deficiency to prior art; The present invention provides a kind of on-line temperature monitoring system and monitoring method thereof that is used for OPPC; This method is used for the OPPC optical cable temperature of operation is carried out real time partitioned monitoring, for application such as transmission line fault early warning, dynamic compatibilization provide temperature data accurately.
The objective of the invention is to adopt following technical proposals to realize:
A kind of on-line temperature monitoring system that is used for OPPC, its improvements are that said monitoring system comprises OPPC optical cable 1, light unit 2, cable splice closure 3, leading in cable 4, thermometric main frame 5 and supervisory control comuter 6; Said OPPC optical cable 1, light unit 2, cable splice closure 3, leading in cable 4 are connected with thermometric main frame 5 successively; Said supervisory control comuter 6 is connected with thermometric main frame 5;
Said monitoring system is connected with the transmission line of electricity condition monitoring system with the current-carrying capacity evaluating system respectively.
Wherein, said OPPC optical cable 1 comprises at least one deck steel core 11, at least one light unit 12 and one deck aluminum steel 13 at least; The center strengthening core of the said steel core of one deck at least 11 and at least one light unit 12 formation OPPC optical cable; It is outer that the said aluminum steel of one deck at least 13 evenly is arranged on the center strengthening core.
Wherein, said steel core 11 adopts aluminum-clad steel wire or galvanized steel wire; Said smooth unit 12 is a stainless steel tube optical unit; Said aluminum steel 13 or be aluminium alloy.
Wherein, said smooth unit 2 comprises optical fiber and protective material with light unit 12; Said optical fiber comprises thermometric optical fiber and telecommunication optical fiber; Said thermometric optical fiber and telecommunication optical fiber material water-proof material ointment in steel pipe is filled fixing; Said thermometric optical fiber adopts multimode 62.5/125 or 50/125 micron optical fiber; Said protective material adopts metal or nonmetal.
Wherein, the OPPC optical cable 1 of integrated thermometric optical fiber is applied in the different electric pressures of 10kV-500kV.
Wherein, the thermometric optical fiber of said OPPC optical cable 1 is connected with the thermometric optical fiber of light unit 2; The thermometric optical fiber of said smooth unit 2 is connected with said cable splice closure 3.
Wherein, said cable splice closure 3 is used to accomplish the photodetachment of OPPC optical cable, and docks the thermometric optical fiber of the thermometric optical fiber of said OPPC optical cable 1 and light unit 2 with leading in cable 4.
Wherein, said leading in cable 4 adopts the optical fiber that decays to the 3db/ kilometer, laser instrument emitted laser source coupling in said leading in cable 4 transmission and the thermometric main frame 5.
Wherein, said thermometric main frame 5 comprises laser instrument 51, light source amplifier 52, wavelength division multiplexer 53, logic trigger circuit 54, control chip 55, photoelectric commutator 56, analog to digital conversion circuit 57, analogue signal processor 58 and communication interface 59;
The light signal of said laser instrument 51 passes to analogue signal processor 58 through light source amplifier 52, wavelength division multiplexer 53 and photoelectric commutator 56;
Said analogue signal processor 58 is with passing to analog to digital conversion circuit 57 after the signal Processing;
Said control chip 55 is communicated by letter with light source amplifier 52, logic trigger circuit 54 and analogue signal processor 58 respectively;
Said logic trigger circuit 54 just 57 is communicated by letter with analog to digital conversion with laser instrument 51 respectively;
Said communication interface 59 intercoms with control chip 55 mutually.
Wherein, said laser instrument 51 emission lasing light emitters, said lasing light emitter adopts the long wave design; Comprise driving circuit in the said laser instrument 51; Said driving circuit is used to reduce noise and improves driving power.
Wherein, said light source amplifier 52 adopts Erbium-Doped Fiber Amplifier (EDFA); The incident light emission accomplished by said wavelength division multiplexer 53 and reflected light receives.
Wherein, said logic trigger circuit 54 provides modulation signal to laser instrument, and it is the above electrical pulse sequence of 10ns that said modulation signal adopts width; Said control chip 55 comprises storer.
Wherein, said photoelectric commutator 56 adopts avalanche diode, is used to realize the conversion of reflected light to current signal; Said reflected light comprises stokes light and square stokes light;
Said analogue signal processor 58 is accomplished current signal to the voltage signal conversion, and carries out processing and amplifying to voltage signal; Analog-digital conversion circuit as described 57 adopts modulus conversion chips, adopts parallel interface to be connected between modulus conversion chip and the control chip.
Wherein, said communication interface 59 adopts Ethernet or serial communication mode; Said sensing data signals is imported and stores in the storer of control chip through said communication interface in real time; Said sensing data signals comprises environment temperature, intensity of sunshine and wind velocity signal.
Wherein, said supervisory control comuter 6 is used to accomplish storage and the statistical study to data, and offers current-carrying capacity evaluating system and transmission line of electricity condition monitoring system data.
The present invention is based on a kind of on-line temperature monitoring method that is used for OPPC that another purpose provides, its improvements are that said method comprises the steps:
A, the said smooth unit 12 of collection or light unit 2 each range points thermometric fiber optic temperature;
The thermometric fiber optic temperature of B, said steps A and the current value data map of said supervisory control comuter 6;
The logical relation of C, the said current value of judgement and thermometric fiber optic temperature;
D, the said OPPC optical cable heat transfer model of importing;
E, OPPC optical cable temperature is revised;
F, store data and generate OPPC optical cable temperature monitoring basic database.
Wherein, in the said steps A, the scope of each range points is between 0.5m-1m; The Measuring Time of said thermometric main frame 5 thermometric passages is 40s; The real time data of the coordinate figure of corresponding each range points of said thermometric fiber optic temperature constantly to refresh in 40 seconds:
（X
1,T
1）、（X
2,T
2）、（X
3,T
3）…（X
n,T
n）；
Wherein: X representes distance; T representes temperature; X
1Distance for first range points; T
1Obtain the thermometric fiber optic temperature of the correspondence of first range points; X
2It is the distance of second range points; T
2Obtain the thermometric fiber optic temperature of the correspondence of second range points; X
3It is the distance of the 3rd range points; T
3Obtain the thermometric fiber optic temperature of the correspondence of the 3rd range points; X
nIt is the distance of n range points; T
nObtain the thermometric fiber optic temperature of the correspondence of n range points; N is that the adjust the distance multiple of resolution of total measuring distance rounds.
Wherein, among the said step B, import the current value data of said supervisory control comuter 6, obtain the coordinate figure of thermometric fiber optic temperature, actual current value and range points:
（X
1，T
1，I
1）、（X
2，T
2，I
2）、（X
3，T
3，I
3）…（X
n，T
n，I
n）；
Wherein: I
1The current value of representing first range points; I
2The current value of second range points of expression; I
3The current value of representing the 3rd range points; I
nThe current value of representing n range points; The effective value of actual current in the 40s time in the steps A of corresponding supervisory control comuter 6 outputs of said current value.
Wherein, among the said step C, the thermometric fiber optic temperature increased perhaps constant when the logical relation of said current value and thermometric fiber optic temperature was the current value increase; Heat conduction time is greater than pathway reaction time 40s;
If do not satisfy heat conduction time, then judge environment temperature t1, intensity of sunshine q and wind speed v influence to the thermometric fiber optic temperature greater than pathway reaction time 40s.
Wherein, among the said step D, at environment temperature t1, intensity of sunshine q and the said OPPC optical cable heat transfer model of wind speed v one timing be: y=f (T);
Wherein: y representes OPPC optical cable temperature; T representes the thermometric fiber optic temperature of steps A.
Wherein, in the said step e, said OPPC optical cable temperature is revised in conjunction with actual current value, environment temperature t1, intensity of sunshine q and wind speed v.
Wherein, in the said step F, the OPPC optical cable temperature and the range points of correction store in the database, form OPPC optical cable temperature monitoring basic database: (X
1, y
1), (X
2, y
2), (X
3, y
3) ... (X
n, y
n);
Store with actual current value, form OPPC optical cable dynamic compatibilization basic database: (X
1, y
1, I
1), (X
2, y
2, I
2), (X
3, y
3, I
3) ... (X
n, y
n, I
n);
OPPC optical cable temperature monitoring basic database and OPPC optical cable dynamic compatibilization basic database are stored in the storer of said control chip 55.
With the prior art ratio, the beneficial effect that the present invention reaches is:
1, the temperature checking method that is used for OPPC provided by the invention is based on OPPC temperature norm type; The OPPC optical cable temperature accuracy that obtains is high;
2, the temperature checking method that is used for OPPC provided by the invention; According to distance, the fiber optic temperature measured; The actual current that obtains is judged the logical relation of said current value and thermometric fiber optic temperature, for shifting environment temperature, intensity of sunshine, the multiple factor affecting of wind speed onto the basis is provided;
3, the on-line temperature monitoring system that is used for OPPC provided by the invention realizes a lead completion transmission of electricity, communication, three kinds of functions of thermometric, has improved the combination property that the OPPC optical cable is used;
4, the on-line temperature monitoring method that is used for OPPC provided by the invention is considered the influence to OPPC optical cable thermometric optical fiber of environment temperature, intensity of sunshine, the multiple factor of wind speed, effectively improves the performance of transmission line of electricity condition monitoring system sensor.
Description of drawings
Fig. 1 is the on-line temperature monitoring system chart that is used for OPPC provided by the invention;
Fig. 2 is the synoptic diagram of the OPPC optical cable 1 of integrated thermometric optical fiber provided by the invention;
Fig. 3 is the schematic diagram of thermometric main frame 5 provided by the invention;
Fig. 4 is the process flow diagram that is used for the on-line temperature monitoring method of OPPC provided by the invention.
Embodiment
Do further to specify below in conjunction with the accompanying drawing specific embodiments of the invention.
The on-line temperature monitoring system chart that is used for OPPC provided by the invention is as shown in Figure 1, and monitoring system comprises OPPC optical cable 1, light unit 2, cable splice closure 3, leading in cable 4, thermometric main frame 5 and supervisory control comuter 6; OPPC optical cable 1, light unit 2, cable splice closure 3, leading in cable 4 and thermometric main frame 5 are connected successively; Supervisory control comuter 6 is connected with thermometric main frame 5.
The OPPC optical cable 1 of integrated thermometric optical fiber provided by the invention is as shown in Figure 2, and OPPC optical cable 1 comprises at least one deck steel core 11, at least one light unit 12 and one deck aluminum steel 13 at least; The center strengthening core of the said steel core of one deck at least 11 and at least one light unit 12 formation OPPC optical cable; At least one deck aluminum steel 13 evenly is arranged on center strengthening core skin.
The OPPC optical cable 1 of integrated thermometric optical fiber is applied in the different electric pressures of 10kV-500kV.The thermometric optical fiber of OPPC optical cable 1 is connected with the thermometric optical fiber of light unit 2; The thermometric optical fiber of light unit 2 is connected with said cable splice closure 3.The protective material of light unit can be a metal, also can be nonmetal, the nonmetal load part that constitutes the OPPC optical cable, and the metal coating material also can be formed the part of OPPC optical cable transmission current.Light unit 2 is can receiving optical fiber, and can protect optical fiber to avoid the damage that reasons such as the thermal effect of environmental change, external force, long-term and short-term, moisture cause.Light unit 2 can comprise skeleton or the suitable material water-proof material of metal tube, plastic tube, trough of belt as the protection structure, uses steel pipe as fiber optic protection among the thermometric OPPC.
Leading in cable 4 adopts the optical fiber that decays to the 3db/ kilometer, laser instrument emitted laser source coupling in leading in cable 4 transmission and the thermometric main frame 5.
Thermometric main frame principle provided by the invention is as shown in Figure 3, and thermometric main frame 5 comprises laser instrument 51, light source amplifier 52, wavelength division multiplexer 53, logic trigger circuit 54, control chip 55, photoelectric commutator 56, analog to digital conversion circuit 57, analogue signal processor 58 and communication interface 59; Thermometric main frame 5 is according to optical cable segment splicing point quantity; And the optical property transmission parameter of cable splice closure 3, leading in cable 4 and OPPC optical cable 1; Consider the influence that the on-line temperature monitoring system is dispersed; Assess two-way decay, optimize and revise the laser emitting source parameter, the temperature accuracy of improve measuring and apart from bearing accuracy.Thermometric main frame 5 independent design logic trigger circuit guarantee that effectively analog to digital conversion and lasing light emitter transponder pulse are synchronous.
The light signal of laser instrument 51 passes to analogue signal processor 58 through light source amplifier 52, wavelength division multiplexer 53 and photoelectric commutator 56; Analogue signal processor 58 is with passing to analog to digital conversion circuit 57 after the signal Processing; Control chip 55 is communicated by letter with light source amplifier 52, logic trigger circuit 54 and analogue signal processor 58 respectively; Logic trigger circuit 54 just 57 is communicated by letter with analog to digital conversion with laser instrument 51 respectively; Communication interface 59 intercoms with control chip 55 mutually.
The on-line temperature monitoring method flow that is used for OPPC provided by the invention is as shown in Figure 4, and this method comprises the steps:
A, the said smooth unit 12 of collection or light unit 2 each range points thermometric fiber optic temperature:
The scope of each range points is between 0.5m-1m; The Measuring Time of said thermometric main frame 5 thermometric passages is 40s; The real time data of the coordinate figure of corresponding each range points of said thermometric fiber optic temperature constantly to refresh in 40 seconds: (X
1, T
1), (X
2, T
2), (X
3, T
3) ... (X
n, T
n)
Wherein: X representes distance; T representes temperature; X
1Distance for first range points; T
1Obtain the thermometric fiber optic temperature of the correspondence of first range points; X
2It is the distance of second range points; T
2Obtain the thermometric fiber optic temperature of the correspondence of second range points; X
3It is the distance of the 3rd range points; T
3Obtain the thermometric fiber optic temperature of the correspondence of the 3rd range points; X
nIt is the distance of n range points; T
nObtain the thermometric fiber optic temperature of the correspondence of n range points; N is that the adjust the distance multiple of resolution of total measuring distance rounds.
The thermometric fiber optic temperature of B, said steps A and the current value data map of said supervisory control comuter 6:
Import actual current value I, obtain comprising the real time data of range points, thermometric fiber optic temperature, actual current value: (X
1, T
1, I
1), (X
2, T
2, I
2), (X
3, T
3, I
3) ... (X
n, T
n, I
n), the computing method of current value can obtain according to the Kirchhoff's law current law according to the current sensor data of existing key node in the electric system among the step B.
I
1The current value of representing first range points; I
2The current value of second range points of expression; I
3The current value of representing the 3rd range points; I
nThe current value of representing n range points; The effective value of actual current in the 40s time in the steps A of corresponding supervisory control comuter 6 outputs of said current value.
The logical relation of C, the said current value of judgement and thermometric fiber optic temperature:
The thermometric fiber optic temperature increased perhaps constant when the logical relation of said current value and thermometric fiber optic temperature was the current value increase; Heat conduction time is greater than pathway reaction time 40s; If do not satisfy heat conduction time, then judge environment temperature t1, intensity of sunshine q and wind speed v influence to the thermometric fiber optic temperature greater than pathway reaction time 40s.
D, the said OPPC optical cable heat transfer model of importing:
At environment temperature t1, intensity of sunshine q and the said OPPC optical cable heat transfer model of wind speed v one timing be: y=f (T);
Wherein: y representes OPPC optical cable temperature; T representes thermometric fiber optic temperature in the steps A.
E, OPPC optical cable temperature is revised:
OPPC optical cable 1 temperature is revised, and is the OPPC optical cable temperature of pushing over according to the external condition that presupposes among the step D, and the external condition that presupposes comprises actual current, environment temperature, custom, intensity of sunshine; The reasoning from logic correction actual wire temperature y that need provide step C.Import in conjunction with extra heat transfer agent, comprise the data (mainly comprising environment temperature, custom, intensity of sunshine) of some on-the-spot transmission line of electricity on-line monitoring sensors, and various source place weather forecast data.
F, store data and generate OPPC optical cable temperature monitoring basic database:
OPPC optical cable 1 temperature and the range points revised store in the database, form OPPC optical cable 1 temperature monitoring basic database: (X
1, y
1), (X
2, y
2), (X
3, y
3) ... (X
n, y
n);
Store with actual current value, form OPPC optical cable dynamic compatibilization basic database: (X
1, y
1, I
1), (X
2, y
2, I
2), (X
3, y
3, I
3) ... (X
n, y
n, I
n);
OPPC optical cable 1 temperature monitoring basic database and OPPC optical cable dynamic compatibilization basic database are stored in the storer of said control chip 55.
On-line temperature monitoring system and the monitoring method thereof that is used for OPPC provided by the invention realizes a lead completion transmission of electricity, communication, three kinds of functions of thermometric, improved the combination property that the OPPC optical cable is used; Consider the influence of environment temperature, intensity of sunshine, the multiple factor of wind speed, effectively improve the performance of transmission line of electricity condition monitoring system sensor OPPC optical cable thermometric optical fiber.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although the present invention has been carried out detailed explanation with reference to the foregoing description; Under the those of ordinary skill in field be to be understood that: still can specific embodiments of the invention make amendment or be equal to replacement; And do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (22)
1. on-line temperature monitoring system that is used for OPPC; It is characterized in that said monitoring system comprises OPPC optical cable (1), light unit (2), cable splice closure (3), leading in cable (4), thermometric main frame (5) and supervisory control comuter (6); Said OPPC optical cable (1), light unit (2), cable splice closure (3), leading in cable (4) and thermometric main frame (5) are connected successively; Said supervisory control comuter (6) is connected with thermometric main frame (5);
Said monitoring system is connected with the transmission line of electricity condition monitoring system with the current-carrying capacity evaluating system respectively.
2. on-line temperature monitoring as claimed in claim 1 system is characterized in that, said OPPC optical cable (1) comprises at least one deck steel core (11), at least one light unit (12) and one deck aluminum steel (13) at least; The said steel core of one deck at least (11) and at least one light unit (12) constitute the center strengthening core of OPPC optical cable; It is outer that the said aluminum steel of one deck at least (13) evenly is arranged on the center strengthening core.
3. on-line temperature monitoring as claimed in claim 2 system is characterized in that, said steel core (11) adopts aluminum-clad steel wire or galvanized steel wire; Said smooth unit (12) is a stainless steel tube optical unit; Said aluminum steel (13) or be aluminium alloy.
4. on-line temperature monitoring as claimed in claim 1 system is characterized in that said smooth unit (2) and light unit (12) comprise optical fiber and protective material; Said optical fiber comprises thermometric optical fiber and telecommunication optical fiber; Said thermometric optical fiber and telecommunication optical fiber material water-proof material ointment in steel pipe is filled fixing; Said thermometric optical fiber adopts multimode 62.5/125 or 50/125 micron optical fiber; Said protective material adopts metal or nonmetal.
5. like each described on-line temperature monitoring system among the claim 2-3, it is characterized in that the OPPC optical cable (1) of integrated thermometric optical fiber is applied in the different electric pressures of 10kV-500kV.
6. on-line temperature monitoring as claimed in claim 1 system is characterized in that the thermometric optical fiber of said OPPC optical cable (1) is connected with the thermometric optical fiber of light unit (2); The thermometric optical fiber of said smooth unit (2) is connected with said cable splice closure (3).
7. on-line temperature monitoring as claimed in claim 1 system; It is characterized in that; Said cable splice closure (3) is used to accomplish the photodetachment of OPPC optical cable, and docks the thermometric optical fiber of the thermometric optical fiber of said OPPC optical cable (1) and light unit (2) with leading in cable (4).
8. on-line temperature monitoring as claimed in claim 1 system is characterized in that, said leading in cable (4) adopts the optical fiber that decays to the 3db/ kilometer, laser instrument emitted laser source coupling in said leading in cable (4) transmission and the thermometric main frame (5).
9. like claim 1 or 8 described on-line temperature monitoring systems; It is characterized in that said thermometric main frame (5) comprises laser instrument (51), light source amplifier (52), wavelength division multiplexer (53), logic trigger circuit (54), control chip (55), photoelectric commutator (56), analog to digital conversion circuit (57), analogue signal processor (58) and communication interface (59);
The light signal of said laser instrument (51) passes to analogue signal processor (58) through light source amplifier (52), wavelength division multiplexer (53) and photoelectric commutator (56);
Said analogue signal processor (58) is with passing to analog to digital conversion circuit (57) after the signal Processing;
Said control chip (55) is communicated by letter with light source amplifier (52), logic trigger circuit (54) and analogue signal processor (58) respectively;
Said logic trigger circuit (54) is communicated by letter with analog to digital conversion (57) with laser instrument (51) respectively;
Said communication interface (59) intercoms with control chip (55) mutually.
10. on-line temperature monitoring as claimed in claim 9 system is characterized in that, said laser instrument (51) emission lasing light emitter, and said lasing light emitter adopts the long wave design; Said laser instrument comprises driving circuit in (51); Said driving circuit is used to reduce noise and improves driving power.
11. on-line temperature monitoring as claimed in claim 9 system is characterized in that, said light source amplifier (52) adopts Erbium-Doped Fiber Amplifier (EDFA); Said wavelength division multiplexer (53) is accomplished the incident light emission and reflected light receives.
12. on-line temperature monitoring as claimed in claim 9 system is characterized in that said logic trigger circuit (54) provides modulation signal to laser instrument, it is the above electrical pulse sequence of 10ns that said modulation signal adopts width; Said control chip (55) comprises storer.
13. on-line temperature monitoring as claimed in claim 9 system is characterized in that, said photoelectric commutator (56) adopts avalanche diode, is used to realize the conversion of reflected light to current signal; Said reflected light comprises stokes light and square stokes light;
Said analogue signal processor (58) is accomplished current signal to the voltage signal conversion, and carries out processing and amplifying to voltage signal; Analog-digital conversion circuit as described (57) adopts modulus conversion chip, adopts parallel interface to be connected between modulus conversion chip and the control chip.
14. on-line temperature monitoring as claimed in claim 9 system is characterized in that, said communication interface (59) adopts Ethernet or serial communication mode; Said sensing data signals is imported and stores in the storer of control chip through said communication interface in real time; Said sensing data signals comprises environment temperature, intensity of sunshine and wind velocity signal.
15. on-line temperature monitoring as claimed in claim 1 system is characterized in that said supervisory control comuter (6) is used to accomplish storage and the statistical study to data, and offers current-carrying capacity evaluating system and transmission line of electricity condition monitoring system data.
16. an on-line temperature monitoring method that is used for OPPC is characterized in that said method comprises the steps:
A, collection said smooth unit (12) or light unit (2) each range points thermometric fiber optic temperature;
The current value data map of the thermometric fiber optic temperature of B, said steps A and said supervisory control comuter (6);
The logical relation of C, the said current value of judgement and thermometric fiber optic temperature;
D, the said OPPC optical cable heat transfer model of importing;
E, OPPC optical cable temperature is revised;
F, store data and generate OPPC optical cable temperature monitoring basic database.
17. on-line temperature monitoring method as claimed in claim 16 is characterized in that, in the said steps A, the scope of each range points is between 0.5m-1m; The Measuring Time of said thermometric main frame (5) thermometric passage is 40s; The real time data of the coordinate figure of corresponding each range points of said thermometric fiber optic temperature constantly to refresh in 40 seconds:
（X
1,T
1）、（X
2,T
2）、（X
3,T
3）…（X
n,T
n）；
Wherein: X representes distance; T representes temperature; X
1Distance for first range points; T
1Obtain the thermometric fiber optic temperature of the correspondence of first range points; X
2It is the distance of second range points; T
2Obtain the thermometric fiber optic temperature of the correspondence of second range points; X
3It is the distance of the 3rd range points; T
3Obtain the thermometric fiber optic temperature of the correspondence of the 3rd range points; X
nIt is the distance of n range points; T
nObtain the thermometric fiber optic temperature of the correspondence of n range points; N is that the adjust the distance multiple of resolution of total measuring distance rounds.
18. on-line temperature monitoring method as claimed in claim 16 is characterized in that, among the said step B, imports the current value data of said supervisory control comuter (6), obtains the coordinate figure of thermometric fiber optic temperature, actual current value and range points:
（X
1，T
1，I
1）、（X
2，T
2，I
2）、（X
3，T
3，I
3）…（X
n，T
n，I
n）；
Wherein: I
1The current value of representing first range points; I
2The current value of second range points of expression; I
3The current value of representing the 3rd range points; I
nThe current value of representing n range points; The effective value of actual current in the 40s time in the steps A of the corresponding supervisory control comuter of said current value (6) output.
19. on-line temperature monitoring method as claimed in claim 16 is characterized in that, among the said step C, the thermometric fiber optic temperature increased perhaps constant when the logical relation of said current value and thermometric fiber optic temperature was the current value increase; Heat conduction time is greater than pathway reaction time 40s;
If do not satisfy heat conduction time, then judge environment temperature t1, intensity of sunshine q and wind speed v influence to the thermometric fiber optic temperature greater than pathway reaction time 40s.
20. on-line temperature monitoring method as claimed in claim 16 is characterized in that, among the said step D, at environment temperature t1, intensity of sunshine q and the said OPPC optical cable heat transfer model of wind speed v one timing is: y=f (T);
Wherein: y representes OPPC optical cable temperature; T representes the thermometric fiber optic temperature of steps A.
21. on-line temperature monitoring method as claimed in claim 16 is characterized in that, in the said step e, in conjunction with actual current value, environment temperature t1, intensity of sunshine q and wind speed v said OPPC optical cable temperature is revised.
22. on-line temperature monitoring method as claimed in claim 16 is characterized in that, in the said step F, the OPPC optical cable temperature and the range points of correction store in the database, form OPPC optical cable temperature monitoring basic database: (X
1, y
1), (X
2, y
2), (X
3, y
3) ... (X
n, y
n);
Store with actual current value, form OPPC optical cable dynamic compatibilization basic database: (X
1, y
1, I
1), (X
2, y
2, I
2), (X
3, y
3, I
3) ... (X
n, y
n, I
n);
OPPC optical cable temperature monitoring basic database and OPPC optical cable dynamic compatibilization basic database are stored in the storer of said control chip (55).
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