CN203310540U - Temperature and strain on-line monitoring device integrating optical phase conductors - Google Patents

Abstract

The utility model provides a temperature and strain on-line monitoring device integrating optical phase conductors. The device comprises a data measurement and management platform, a monitoring computer, and OPPC optical cables and connector boxes thereof. The OPPC optical cables comprise two OPPC optical cables which are connected through a middle connector box of the connector boxes, the other end of one of the OPPC optical cables is connected with a terminal connector box of the connector boxes; the other end of the terminal connector box is connected with the data measurement and management platform through an ADSS cable, and the other end of the data measurement and management platform is connected with the monitoring computer. Through the device, temperature measuring, stress-strain, power transmission and communication functions can be realized through one wire, an early warning is provided when failures, line overtemperature, fatigue strand breaking, fiber core stress, etc., occur, and the performance of an electric transmission line condition monitoring system sensor can be improved.

Description

A kind of temperature and strain on-Line Monitor Device that merges OPPC

Technical field

The utility model relates to the monitoring device in power transmission and transformation monitoring field, specifically relates to temperature and the strain on-Line Monitor Device of a kind of fusion OPPC (OPPC).

Background technology

Along with continuing to optimize of electric network composition, the zone that transmission line of electricity covers is more and more wider, and the safe operation of circuit also is faced with more problem.Outside destroy is most important aspect in the power circuit interruption of service, and main factor is that circuit wind dance, line ice coating, branch foreign matter articulate wire etc.The outside destroy accident easily causes the power line conductive thread breakage results such as thigh, gold utensil damage and failure, shaft tower tilt and collapse of breaking, and produces permanent fault and long-time disrupted circuit power supply, the harm electric power netting safe running, and its harmfulness and economic loss are very huge.And the transmission line of electricity moved at present, most strong line inspection and laggard traditional maintenance modes of robbing and repairing of accident of still continuing to use, do not adopt advanced on-line monitoring, this line upkeep mode has been not suitable for the requirement of modern society to power supply quality, needs research to substitute the automatic monitoring technical of manpower maintenance line.

The load of high-tension cable is large, and thermal value is high, and its surface temperature can reflect the practical operation situation of cable more really, as running overload, cable line insulation fault etc.Based on temperature information, circuit being carried out to the on-line operation Real-Time Monitoring, is the important means that realizes that cable maintenance repair and maintenance, cable fault early warning and diagnosis, line accident are investigated and met an urgent need.Simultaneously, by 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.

What transmission line of electricity strain on-line monitoring adopted at present usually is point type strain measurement mode, be mainly the ess-strain degree of laying strain monitoring sheet monitoring metallic object on shaft tower frame, tension force Ta Lianta gold utensil, thereby calculate stressed situation of change and the outside destroy degree of transmission line of electricity.Although but the existing application of existing transmission line of electricity strain monitoring device is found in investigation, large scale application not yet, exist measuring technique, theoretical calculating and construction costs aspect problem.And in actual applications, between the simulated conditions of on-the-spot meteorological condition and laboratory examination, there is some difference, exists in actual applications consistency problem.And 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, use the wireless communication technology signal transmission.On-the-spot due to problems such as power supply, insulation, communications, be difficult for implementing.

Summary of the invention

For overcoming above-mentioned the deficiencies in the prior art, the utility model proposes a kind of temperature and strain on-Line Monitor Device that merges OPPC, described device comprises DATA REASONING and management platform, supervisory control comuter, OPPC optical cable and connector box thereof, its improvements are: two OPPC optical cables that described OPPC optical cable is connected for the intermediate joint box by described connector box, and the other end of one of them described OPPC optical cable is connected with the no-go sub box of described connector box;

The described no-go sub box other end is connected with the distributed temperature tester with the stress-strain test instrument of management platform with described DATA REASONING respectively by the ADSS cable, and described stress-strain test instrument is connected with the local data server of management platform with described DATA REASONING respectively with the other end that described distributed temperature is surveyed; The other end of described local data server is connected with described supervisory control comuter.

Further, described OPPC optical cable is the OPPC optical cable with temperature and ess-strain perception simultaneously that comprises light unit, steel core and aluminum steel;

Described smooth unit comprises protection tube and the interior ointment of filling of protection tube of optical fiber, optical fiber;

The ess-strain monitoring excess fiber length series of the remaining long definite value of built-in multimode optical fiber and typical optical fiber in described smooth unit;

Described steel core is aluminium Baogang or galvanized steel; Described aluminum steel is aluminium alloy.

Further, described local data server comprises that the ess-strain of the database of storing data and the strain data that calculates optical fiber calculates module.

Further, the described stress-strain test instrument BOTDR fiber optic sensing device that is probe temperature and strain information; The distributed temperature tester is the DTS fiber optic sensing device of probe temperature information.

Further, described local data server is that record is from the stress-strain data that collects described stress-strain test instrument and described distributed temperature tester and the server of temperature data.

Further, the aerial hanger of described ADSS optical cable or wear and bury in cable duct.

Further, described OPPC optical cable can be used for the voltage of 10kv to 500kv different brackets.

With existing apparatus, compare, the beneficial effect that the utility model reaches is:

(1) realize that a wire completes thermometric, ess-strain, transmission of electricity, communication function, the fault pre-alarmings such as circuit overtemperature, tired disconnected strand, fibre core be stressed are provided, improved the combination property of OPPC application; Consider simultaneously the impact on the OPPC thermometric of environment temperature, intensity of sunshine, wind speed many factors, improve the performance of power transmission state monitoring system sensor.

(2) utilize the ROTDR technology to realize the distributed temperature monitoring of OPPC circuit, at BOTDR, measure in matrix data and deduct temperature data, thereby remove temperature influence factor in OPPC circuit BOTDR stress-strain measurement data, the accuracy that has improved OPPC circuit stress-strain measurement.

(3) a kind of New O PPC optical cable with temperature and ess-strain perception has simultaneously been proposed, the optical cable of design is preformed, and multimode optical fiber and single-mode fiber realize that temperature and strain detect simultaneously, take into full account cable line on the basis of the circuit deformation quantity of the links such as production, transportation, installation, operation, maintenance, making one group of excess fiber length series assessment transmission line of electricity health status.

(4) complete transmission line of electricity various states monitoring scheme based on Fibre Optical Sensor has been proposed, try hard to worsen solving powerline ice-covering, tired disconnected strand, disconnected strand of thunderbolt, fibre-optical splice box fibre core stress performance, and the on-line monitoring of realizing the situations such as line oscillation, blast stretching, temperature rise stretching of transmission line of electricity OPGW, OPPC optical cable.

(5) cable based on OPPC has the serviceable life that good corrosion resistance can improve system; Have simultaneously good thermal stability, guarantee the reliable and accurate of temperature-measuring results.

The accompanying drawing explanation

Fig. 1 merges OPPC temperature and strain on-Line Monitor Device figure;

Fig. 2 is the OPPC optical cable of integrated temperature and strain sensing function;

Fig. 3 is the OPPC schematic diagram of thermometric strain sensing;

Fig. 4 is Brillouin's measurement data temperature elimination algorithm figure;

Reference numeral:

1-OPPC optical cable I; 2-OPPC optical cable II, the 3-intermediate joint box; 4-no-go sub box; The 5-ADSS cable; 6-stress-strain test instrument; 7-distributed temperature tester; 8-local data server; The 9-supervisory control comuter; The 10-aluminum-clad steel wire; 11-has excess fiber length light unit (OP); The 12-aluminum steel; 13-thermometric multimode optical fiber; The 14-particular fiber is remaining long; The 15-particular fiber is remaining long; The 16-particular fiber is remaining long; The 17-ess-strain calculates module.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail;

As shown in Figure 1, Fig. 1 is for merging OPPC temperature and strain on-Line Monitor Device figure, in figure, be fusion OPPC temperature and strain on-Line Monitor Device, comprise a kind of New O PPC optical cable structure 1 with ess-strain sensing and temperature sensing function, BOTDR(Brillouin scattering optical time domain reflection detection technique) stress-strain test instrument 6, the monitoring of DTS(optical fiber distributed temperature) distributed temperature tester 7, OPPC intermediate joint box 3, OPPC no-go sub box 4, ADSS optical cable 5, local data server 8 and ess-strain thereof calculate module 17 and user's monitoring terminal 9.

One, device connects

Supervisory control comuter 9 is connected to the local data server 8 of ess-strain and temperature measuring data management, local data server 8 is as the database of BOTDR stress-strain test instrument 6 and DTS distributed temperature tester 7, recording the stress-strain data and the temperature data that collect, local data server 8 comprises that database and ess-strain calculate module 17.Local data server 8, BOTDR stress-strain test instrument 6 and DTS distributed temperature tester 7 are arranged in the communication room of transformer station, monitoring station, complete the send and receive of Fibre Optical Sensor signal, the processing of local data, storage; As the remote data base of user terminal, and parse the event on sensor fibre by complicated processing procedure.No-go sub box 4 is connected with distributed temperature tester 7 with stress-strain test instrument 6 respectively by ADSS optical cable 5.The system of laying of ADSS optical cable 5 has aerial hanger and wears the two kinds of modes in cable duct that are embedded in.OPPC optical cable I1 is connected by OPPC intermediate joint box 3 with OPPC optical cable II2, and OPPC optical cable II2 is connected with ADSS optical cable 5 after connecting OPPC no-go sub box 4.

Two, user terminal

The figure that user's monitoring terminal completes data shows and GPS geography information position display.The front view of user interface is OPPC optical cable layout or wiring diagram, and what show the districution temperature of cable and imagery represents view, temperature distribution history, the each point temperature temporal evolution curve on circuit in real time.Can analyze the OPPC temperature data of measuring, namely according to OPPC fiber optic temperature and other correlation data calculation, go out the conductive surface running temperature.Temperature measurement fraction can arrange alarm threshold value, alert data can arrange in software, each zone should be able to arrange two kinds of type of alarm at least: maximum temperature is reported to the police, temperature rate-of-rise is reported to the police, and can destroy to optical fiber, install the warnings such as abnormal, should be able to independently report to the police in different zones.While alerting signal occurring, switch to the distribution plan of warning picture and fault-signal region, and show fault zone maximum temperature or other relevant alarming indexes.Type of alarm, except main control computer (comprising cable termination monitoring station display) screen display, outside the basic demands such as audio and transmission warning short message, and provides the warning that meets industrial standard output.

Three, cable splice closure

Cable splice closure completes the separation of OPPC photoelectricity part and continuing of optical-fibre channel.The type of cable splice closure is divided into intermediate joint box and no-go sub box.

Intermediate joint box is placed on the anchor support in the middle of circuit, completes the fibre junction of two sections strain section circuits, and on engineering construction, the modes of lifting that adopt are constructed more.The no-go sub box is the initial point of the optical cable of circuit head end or end, adopts the pillar insulator connector box more, by built-in ADSS optical cable the optical fiber cable continued access in OPPC to lead-in wire ADSS cable.

This technology is that the business function such as the assessment, transmission line of electricity transmission capacity dynamic compatibilization of Realtime Alerts, the transmission line of electricity health status of dynamic monitoring, the abnormal stressed stretching of transmission line of electricity of the distributed ess-strain of overhead transmission line and line temperature is realized laying the foundation.

Four, strain and temperature survey OPPC optical cable

As shown in Figures 2 and 3, to be respectively be the OPPC optical cable figure of integrated temperature and strain sensing function and the OPPC schematic diagram of thermometric strain sensing for Fig. 2 and Fig. 3;

The OPPC optical cable of integrated thermometric and stress monitoring function mainly comprises three ingredients: one or more light unit; One deck or multilayer steel core (aluminium Baogang or galvanized steel); One deck or multilayer aluminum steel (aluminium alloy) form.The light unit is comprised of multifiber and protection tube; Protection tube can be metal and/or nonmetallic materials, and it can form the load part of OPPC, and the metal coating material also can form the part of OPPC transmission current.The light unit is can receiving optical fiber, and can protect optical fiber to avoid the damage that the reasons such as the thermal effect of environmental change, external force, long-term and short-term, moisture cause.The light unit can comprise the skeleton of metal tube, plastic tube, trough of belt or suitable material water-proof material as the protection structure, in thermometric OPPC, uses steel pipe to use as fiber optic protection.Optical fiber is accommodated protection in the stainless loose sleeve pipe, in pipe, fills extraordinary ointment, to play waterproof, anti-moisture or other harmful gases, heat insulation effect.

Whole OPPC contains in cross section the material of different conductive performances, is the key that affects OPPC thermometric transient performance.The OPPC optical cable of integrated temperature-measuring optical fiber can be applicable to different electric pressures from 10kV to 500kV, high voltage overhead lines (220kV and more than) the many separated wires of single-phase general employing, the Performance Match problem of the OPPC brought and Qi Fei OPPC, in order to keep identical current-carrying capacity and the electric balance of three-phase, must guarantee as far as possible that OPPC is similar with the diameter that coordinates wire, tensile strength, weight, direct current resistance etc.

Temperature-measuring optical fiber in OPPC light unit beam tube can be selected the multimode optical fiber of 50/125 or 62.5/125 μ M.Loss factor and the scattering coefficient of multimode optical fiber are higher, improve the scattering light intensity, thereby improve the received signal strength of photo-detector, strengthen signal to noise ratio (S/N ratio).The sensor fibre of surveying stress is selected the single-mode fiber of international standard, and BOTDR distinguishes the size of ess-strain amount according to the frequency displacement of test signal, and the susceptibility of algorithm is very high, so BOTDR employing single-mode fiber, and the distance range of detection is also very large, can reach 100KM.

The fibre strain effect that OPPC (OPPC) ess-strain on-line monitoring part causes according to the deformation of optical cable, excess fiber length numerical value, by optical cable deformation, based on the BOTDR technology, realize the monitoring of overhead transmission line stress-strain state, by the rated capacity of BOTDR direct measuring optical fiber strain value and excess fiber length, thus the stressed generation degree of strain of assessment circuit.Based on BOTDR measuring circuit strain scheme, can assess the health status of the overhead transmission line of monitoring, for the blast of transmission line of electricity is waved, temperature sag, icing, and provide data and decision-making foundation for the dynamic compatibilization of transmission line of electricity.

Five, fibre-optical sensing device

BOTDR stress-strain test instrument 6 is distributed Brillouin sensing devices that distributed measurement optical fiber is subjected to external force generation deformation data, and DTS distributed temperature tester 7 is distributed Raman temperature sensors of distributed measurement fiber optic temperature information.

Tester based on Fibre Optical Sensor mainly comprises laser instrument, optical wavelength-division multiplex, photoelectric switching circuit, trigger circuit, control chip, analog signal processing, analog to digital conversion and communication interface.Temperature measuring device can be according to optical cable segment splicing point quantity, and the optical property transformation parameter of connector box, leading in cable and temperature measuring optical cable, the impact of taking into account system dispersiveness, assess two-way decay, optimize and revise the laser emitting source parameter, the temperature accuracy of improve measuring and apart from positioning precision.

Six, temperature is separated and is solved calculating with strain data

As shown in Figure 1, Fig. 1 is for merging OPPC temperature and strain on-Line Monitor Device figure, local data server 8 comprises that the ess-strain of the computing module of the strain data that calculates optical fiber calculates module 17, in the ess-strain information that distributed Brillouin sensing device records, reject the temperature information of distributed Raman sensor measurement, calculate the accurate strain on optical fiber.

As shown in Figure 4, Fig. 4 is Brillouin's measurement data temperature elimination algorithm figure; Specifically be implemented as follows, associating spontaneous Raman scattering and spontaneous brillouin scattering carry out temperature and strain is measured simultaneously, and utilize spontaneous Raman scattering only to responsive to temperature and to the insensitive characteristic of strain, by the distributed Raman temperature sensor, record the temperature information on optical fiber, after obtaining the temperature information of optical fiber, utilize distributed Brillouin sensing device to record the Brillouin shift that comprises temperature and strain information, then from the Brillouin shift amount, removing the value of temperature, thereby calculate the strain information on optical fiber.

Raman anti-Stokes signal intensity to the susceptibility of temperature approximately 0.8%/℃, Brillouin's anti-Stokes signal intensity to temperature sensitivity approximately 0.3%/℃, so Raman is more responsive for the variation of temperature than Brillouin signal.Except the Raman scattering signal, Rayleigh scattering signal is also very important scattered signal in reflected light, the distributed Raman temperature sensor is measured the light intensity of Rayleigh signal usually with the 2nd light source, and by the Rayleigh light intensity with the Raman signal light intensity that another light source records, carry out normalized, elimination fibre loss, the micro-curved and splicing loss impact on system performance.The variation of normalization Raman light intensity and the relation of temperature variation can be expressed as:

$\mathrm{\Δ}{T}_R\left(L\right)=\mathrm{\Δ}{I}_R\left(L\right)C_R^T$

In formula, L is the length of sensor fibre; Δ T _R(on) be the variation of L place, position temperature; Δ I _R(on) Δ IR (L) is the variation of position L place normalization Raman light intensity; It is the temperature coefficient of Raman light intensity.

The Brillouin shift variation comprises temperature and strain information, and the temperature impact from deduction the measurement result of Brillouin shift calculates just can obtain being changed to of fiber position L place's strain:

$\mathrm{\Δ\ϵ}\left(L\right)=\frac{\mathrm{\Δ}{v}_B\left(L\right)-C_{\mathrm{Bv}}^T\·\mathrm{\Δ}{T}_R\left(L\right)}{C_{\mathrm{Bv}}^{\mathrm{\ϵ}}}$

In formula, Δ v _B(L) be the variation of L place Brillouin shift; It is the temperature coefficient of Brillouin shift; It is the coefficient of strain of Brillouin shift.The coefficient of Brillouin shift For 1.07MHz/ ℃, For 0.05MHz/ μ.

Finally should be noted that: above embodiment is only be used to technical scheme that the application is described but not to the restriction of its protection domain; although with reference to above-described embodiment, the application is had been described in detail; those of ordinary skill in the field are to be understood that: those skilled in the art still can carry out all changes, revise or be equal to replacement to the embodiment of application after reading the application; these changes, revise or be equal to replacement, all within the claim protection domain that application is awaited the reply.

Claims (6)

1. temperature and strain on-Line Monitor Device that merges OPPC, described device comprises DATA REASONING and management platform, supervisory control comuter, OPPC optical cable and connector box thereof, it is characterized in that: two OPPC optical cables that described OPPC optical cable is connected for the intermediate joint box by described connector box, the other end of one of them described OPPC optical cable is connected with the no-go sub box of described connector box;

The described no-go sub box other end is connected with the distributed temperature tester with the stress-strain test instrument of management platform with described DATA REASONING respectively by the ADSS cable, and the other end of described stress-strain test instrument and described distributed temperature tester is connected with the local data server of management platform with described DATA REASONING respectively; The other end of described local data server is connected with described supervisory control comuter.

2. a kind of temperature and strain on-Line Monitor Device that merges OPPC as claimed in claim 1 is characterized in that: described OPPC optical cable is the OPPC optical cable with temperature and ess-strain perception simultaneously that comprises light unit, steel core and aluminum steel;

Described smooth unit comprises protection tube and the interior ointment of filling of protection tube of optical fiber, optical fiber;

Built-in multimode optical fiber and ess-strain monitoring excess fiber length series in described smooth unit;

Described steel core is aluminium Baogang or galvanized steel; Described aluminum steel is aluminium alloy.

3. a kind of temperature and strain on-Line Monitor Device that merges OPPC as claimed in claim 1, it is characterized in that: described stress-strain test instrument is the BOTDR fiber optic sensing device that distributed measurement optical fiber is subjected to external force generation deformation data; The distributed temperature tester is the DTS fiber optic sensing device of distributed measurement fiber optic temperature information.

4. a kind of temperature and strain on-Line Monitor Device that merges OPPC as claimed in claim 1 is characterized in that: described local data server is record from the stress-strain data collected described stress-strain test instrument and described distributed temperature tester and the server of temperature data.

5. a kind of temperature and strain on-Line Monitor Device that merges OPPC as claimed in claim 1 is characterized in that: the aerial hanger of described ADSS optical cable or wear and bury in cable duct.

6. a kind of temperature and strain on-Line Monitor Device that merges OPPC as claimed in claim 1, described OPPC optical cable can be used for the voltage of 10kv to 500kv different brackets.