CN203396732U

CN203396732U - Heat stability testing device of OPGW (Optical Power Ground Wire) cable in ice melting process

Info

Publication number: CN203396732U
Application number: CN201320490024.0U
Authority: CN
Inventors: 卢世才
Original assignee: Tianshengqiao Bureau of Extra High Voltage Power Transmission Co
Current assignee: Tianshengqiao Bureau of Extra High Voltage Power Transmission Co
Priority date: 2013-08-12
Filing date: 2013-08-12
Publication date: 2014-01-15
Anticipated expiration: 2023-08-12

Abstract

The utility model discloses a heat stability testing device of an OPGW (Optical Power Ground Wire) cable in an ice melting process. The heat stability testing device comprises an OPGW cable and a constant current source, wherein the OPGW cable comprises a plurality of optical fibers which are serially connected to form a test optical fiber, a first connecting point and a second connecting point are arranged on the test optical fiber, two ends of the constant current source are respectively connected with the first connecting point and the second connecting point, at least one tensile amour clamp, a drainage parallel groove clamp and a suspension clamp are arranged on the test optical fiber between the first connecting point and the second connecting point, a first thermocouple, a second thermocouple and a third thermocouple are respectively connected to the surfaces of the tensile amour clamp, the drainage parallel groove clamp and the suspension clamp, and a fourth thermocouple is connected to the surface of the test optical fiber between the first connecting point and the second connecting point. According to the heat stability testing device, a large-current heat stability performance test is carried out on the surface and the fiber core temperature rise of one OPGW cable by adopting the plurality of thermocouples, and the current intensity and the temperature rise range of the optical fiber without generating remarkable attenuation are ensured in the ice melting process.

Description

The heat stabilization test device of a kind of OPGW optical cable in deicing processes

Technical field

The utility model relates to optical fiber communication equipment technical field, is specifically related to the heat stabilization test device of a kind of OPGW optical cable in deicing processes.

Background technology

OPGW(Optical Fiber Composite Overhead Ground Wire Optical Fiber composite overhead Ground Wire) erecting cable, in the top of high voltage overhead power transmission sequence, meeting under the prerequisite of high-tension line lightning protection, also plays a part transmission light information.Its capacity is large, safe, is described as the gold information transfer channel.The ice-melt of OPGW cable is mainly to increase the transmission current of wire or adopt short-circuit current, by electric energy conversion, be heat energy, reach ice-melt thermal equilibrium and realize ice-melt, and OPGW cable increase short-circuit current is being carried out in the process of ice-melt, because the large lasting time of electric current is grown (generally wanting 1 hour), can cause OPGW optical cable internal temperature rise to surpass the maximum allowable temperature of+70 ℃, therefore research thermal stability in OPGW optical cable deicing processes has very large necessity to the impact of optical fiber attenuation.The existing optical fiber attenuation situation to after the ice-melt of OPGW optical cable detects mostly to be on line carries out, and this method afterwards detecting is both inconvenient, and the remedial measures going wrong also needs to waste a large amount of manpower and financial resources.

Utility model content

In order to address the above problem, the utility model provides the heat stabilization test device of a kind of OPGW optical cable in deicing processes, it is analyzed OPGW optical cable thermal stability and optical fiber attenuation under the effect of large electric current by experimental measurement mechanism, thereby obtains the limit of temperature rise of the required electric current of stable ice-melt and OPGW optical cable.

For realizing above object, the technical scheme that the utility model is taked is:

The heat stabilization test device of a kind of OPGW optical cable in deicing processes, it comprises OPGW optical cable and constant current source, described OPGW optical cable comprises multifiber, this multifiber serial connection forms a test optical fiber, described test optical fiber is provided with one first tie point and one second tie point, the two ends of constant current source are connected with the second tie point with this first tie point respectively, on test optical fiber between described the first tie point and the second tie point, at least one strain hardware fitting is installed, at least one drainage parallel groove clamp and at least one suspension clamp, described strain hardware fitting, the surface that wire clamp and suspension clamp are merged in drainage is connected with respectively the first thermopair, the second thermopair and three thermocouple, and the surface of the test optical fiber between this first tie point and the second tie point is connected with at least one the 4th thermopair.

The electric current of described constant current source is 340A-380A.

Described OPGW optical cable is OPGW-24B1-138 type optical cable, and it comprises 9 optical fiber.

The length of the test optical fiber between described the first tie point and the second tie point is 15 meters.

Wherein one end of described test optical fiber is connected with a distributed optical fiber temperature sensor by bare fibre.

Between described bare fibre and test optical fiber, a splice tray is also installed.

The utility model compared with prior art, its advantage having is: the thermal stability that the utility model adopts a plurality of thermopairs to carry out large electric current to the surface temperature rise of this OPGW optical cable and fibre core temperature rise by one section of OPGW optical cable is tested, obtain this OPGW optical cable and in deicing processes, guarantee that strength of current and the limit of temperature rise under obviously decay do not occur optical fiber, thereby abandoned the drawback that on line, detection occurs.

Accompanying drawing explanation

Fig. 1 is the structural representation of the heat stabilization test device of the utility model OPGW optical cable in deicing processes.

Wherein: 1, test optical fiber; 11, the first tie point; 12, the second tie point; 2, constant current source; 3, switch; 4, strain hardware fitting; 5, drainage parallel groove clamp; 61, suspension clamp; 62, suspension clamp; 63, suspension clamp; 71, thermopair; 72, thermopair; 73, thermopair; 74, thermopair; 75, thermopair; 76, thermopair; 77, thermopair; 8, distribution Double-line temp probe; 9, bare fibre; 91, splice tray.

Embodiment

Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.

Embodiment

Please refer to shown in Fig. 1, the heat stabilization test device of a kind of OPGW optical cable in deicing processes, it comprises OPGW optical cable and constant current source 2.OPGW optical cable can adopt OPGW-24B1-138 type optical cable, and it comprises 9 optical fiber, and these 9 optical fiber serial connections are formed to a test optical fiber 1.The OPGW optical cable of getting 300m forms the test optical fiber of 2.7km.Test optical fiber is provided with one first tie point 11 and one second tie point 12, and the two ends of constant current source 2 are connected with the second tie point 12 with this first tie point 11 respectively, the preferred 15m of length of the test optical fiber 1 between this first tie point 11 and the second tie point 12.The current settings of constant current source 2 is in the scope of 340A-380A, is connected in series a switch 3 on constant current source 2 branch roads.

On test optical fiber 1 between the first tie point 11 and the second tie point 12, at least one strain hardware fitting, at least one drainage parallel groove clamp and at least one suspension clamp are installed, in the utility model preferred embodiment, adopt a strain hardware fitting 4 and drainage parallel groove clamp 5 and three suspension clamps (being respectively suspension clamp 61, suspension clamp 62 and suspension clamp 63).The surface of strain hardware fitting 4 connects a thermopair 71, for the temperature rise to this strain hardware fitting, monitors; The surface of drainage parallel groove clamp 5 connects a thermopair 72, for the temperature rise of this drainage parallel groove clamp 5 is monitored; The surface of suspension clamp 61, suspension clamp 62 and suspension clamp 63 is connected with respectively thermopair 73, thermopair 74 and the thermopair 75 that it is monitored; Meanwhile, the surface of the test optical fiber 1 between the first tie point 11 and the second tie point 12 connects thermopair 76 and thermopair 77, for the surface temperature rise of this test optical fiber 1 is monitored.In wherein one end of test optical fiber 1, pass through bare fibre 9 simultaneously and be connected with a distributed optical fiber temperature sensor 8, for the fibre core temperature rise to OPGW optical cable, measure, between bare fibre 9 and test optical fiber 1, by a splice tray 91 is installed, realize connection.And any two points that can test optical fiber 1 at this adds optical sender and photoreceiver, for the decay of this test optical fiber 1 is monitored, the test by repeatedly draws table 1 data.

Table 1

From above optical fiber attenuation situation of change, analyze, in inside of optical fibre temperature, raise and to reach more than 100 ℃ after two hours, 1310nm optical fiber attenuation remains on 0.570～0.574dB/km left and right substantially, and 1550nm optical fiber attenuation remains on 0.429～0.431dB/km left and right substantially.

DTS(distributed optical fiber temperature sensor 8) record inside of optical fibre temperature rise situation of change:

In carrying out temperature rise test process, we adopt DTS equipment to test OPGW optical cable fibre core internal temperature, test result as shown in table 2 (temperature in table be select temperature higher than 9 points of 105 ℃ as measuring point).

Time-temperature ℃

Table 2

From table 2, DTS testing inner fibre core situation of change is analyzed, and in whole test process, internal temperature is all over more than 100 ℃.

Conclusion:

(1) for the power communication special optical cables such as OPGW, 70 ℃-80 ℃ of normal long-term serviceability temperatures, to the proper communication of optical fiber and Long Service Life, can not exert an influence, even if OPGW stands thunderbolt or short-circuit current causes short time high temperature, as long as its time of bearing higher temperature is enough short, also can't obviously affect optical fiber serviceable life and optical fiber attenuation.

(2) in temperature rise test, optic fibre environment temperature progressively rises to more than 100 ℃ and 100 ℃～135 ℃ temperature ranges and keeps approximately three hours from 26 ℃ of room temperatures, in whole process of the test, optical fiber attenuation do not detected and occur significant change, maximum variable quantity is ± 0.03dB/km.

(3) consider that the environment in on-the-spot OPGW deicing processes is subject to the impact of wind speed and environment temperature larger, meeting absorption portion OPGW heat in actual deicing processes, so under actual conditions, temperature can be over 80 ℃.

(4) in OPGW optical cable deicing processes, load 300A left and right electric current, continue in 1 hour situation, when environment temperature is 0 ℃, according to its temperature rise contrast, there will not be the significant change of OPGW optical cable fibre core attenuation.

For preventing occurring that in the ice-melt of OPGW optical cable long-time high temperature causes optical cable fibre core to damage, and should note the problem of the following aspects in deicing processes:

(1) in deicing processes, should strengthen the monitoring to on-the-spot optical cable fibre core temperature, after temperature surpasses 100 ℃, answer emphasis to monitor fibre core attenuation situation of change;

(2) current time being loaded in deicing processes on optical cable is unsuitable long, avoids causing optical cable permanent damage;

(3) in deicing processes, to strictly control the size of ice melting current well, avoid optical cable temperature rise to surpass its thermal stability.

The above embodiment has only expressed optimal design of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with claims.

Claims

1. the OPGW optical cable heat stabilization test device in deicing processes, it is characterized in that, it comprises OPGW optical cable and constant current source, described OPGW optical cable comprises multifiber, this multifiber serial connection forms a test optical fiber, described test optical fiber is provided with one first tie point and one second tie point, the two ends of constant current source are connected with the second tie point with this first tie point respectively, on test optical fiber between described the first tie point and the second tie point, at least one strain hardware fitting is installed, at least one drainage parallel groove clamp and at least one suspension clamp, described strain hardware fitting, the surface that wire clamp and suspension clamp are merged in drainage is connected with respectively the first thermopair, the second thermopair and three thermocouple, and the surface of the test optical fiber between this first tie point and the second tie point is connected with at least one the 4th thermopair.

2. the heat stabilization test device of OPGW optical cable according to claim 1 in deicing processes, is characterized in that, the electric current of described constant current source is 340A-380A.

3. the heat stabilization test device of OPGW optical cable according to claim 1 and 2 in deicing processes, is characterized in that, described OPGW optical cable is OPGW-24B1-138 type optical cable, and it comprises 9 optical fiber.

4. the heat stabilization test device of OPGW optical cable according to claim 3 in deicing processes, is characterized in that, the length of the test optical fiber between described the first tie point and the second tie point is 15 meters.

5. the heat stabilization test device of OPGW optical cable according to claim 1 in deicing processes, is characterized in that, wherein one end of described test optical fiber is connected with a distributed optical fiber temperature sensor by bare fibre.

6. the heat stabilization test device of OPGW optical cable according to claim 5 in deicing processes, is characterized in that, between described bare fibre and test optical fiber, a splice tray is also installed.