CN205229527U - Power cable connects composite cable for temperature monitoring and monitoring system thereof - Google Patents

Power cable connects composite cable for temperature monitoring and monitoring system thereof Download PDF

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Publication number
CN205229527U
CN205229527U CN201520889474.6U CN201520889474U CN205229527U CN 205229527 U CN205229527 U CN 205229527U CN 201520889474 U CN201520889474 U CN 201520889474U CN 205229527 U CN205229527 U CN 205229527U
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China
Prior art keywords
optical fiber
cable
monitoring
power cable
composite cable
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CN201520889474.6U
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Chinese (zh)
Inventor
方玄
吉俊兵
刘军
华永强
薛炯
沈岳文
陈强
徐劼
王志东
顾少明
蔡晓峰
徐俊峰
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JIANGYIN POWER SUPPLY Co OF JIANGSU ELECTRIC POWER Co
JIANGSU FASTEN OPTOELECTRONICS TECHNOLOGY Co Ltd
Original Assignee
JIANGYIN POWER SUPPLY Co OF JIANGSU ELECTRIC POWER Co
JIANGSU FASTEN OPTOELECTRONICS TECHNOLOGY Co Ltd
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Priority to CN201520889474.6U priority Critical patent/CN205229527U/en
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Abstract

The utility model relates to a power cable connects composite cable for temperature monitoring and monitoring system thereof, composite cable (3) include heat sensitive optical fiber (3 -3) and the communication optical fiber (3 -5) of suit in beam tube (3 -4), it has tensile layer to wrap up in to cover outside the beam tube (3 -4), and the tensile layer overcoat is equipped with oversheath (3 -1), the system includes along composite cable (3) that power cable (1) length direction set up, and twine on power cable's (1) power cable connects (2) composite cable (3), and the heat sensitive optical fiber (3 -3) in composite cable (3) is connected to temperature measurement host computer (4), and the communication optical fiber (3 -5) in composite cable (3) is connected to electric power system intranet (5), and has articulated monitoring host (6) and alarm device (7) on electric power system intranet (5). The utility model discloses power cable connects composite cable for temperature monitoring and monitoring system thereof measures the accuracy, is difficult for receiving the interference and has the real -time supervision ability.

Description

Power cable connector temperature monitoring composite cable and monitoring system thereof
Technical field
The utility model relates to a kind of temperature monitoring composite cable and monitoring system thereof, especially relate to a kind of based on distribution type fiber-optic temperature monitoring is carried out to power cable connector and possess simultaneously data transmission capabilities optical cable and should the system of this optical cable, belong to technical field of optical fiber sensing.
Background technology
Along with the upgrading of China's urban distribution network and improving constantly of power cable manufacturing technology, power cable is used widely in urban distribution network, and particularly the usage quantity of the power cable of voltage levels occupies larger specific gravity in existing grid equipment.
For implementing the requirement of " adhering to putting prevention first; implement safety practice; ensure safety in production " further, improve every anti-accident measures, promote electric power safety better to produce, have target, prevented the generation of the great serious accident of electrical production, State Grid Corporation of China from promulgating with having emphasis " preventing 25 important requirements of electrical production major accident " (state electricity send out [2000] No. 589); Original text 1.1.11 clause explicitly calls for " to the regular thermometric of cable mid head ", is damaged to prevent cable splice.
At present, conventional cable temperature monitoring method mainly contains:
1) temperature sensing cable formula thermometric, by temperature sensing cable and cable parallelization, when cable temperature exceedes fixed temperature value, sensing cable is shorted, and sends alerting signal to control system; The shortcoming of plain edition temperature sensing cable is: destructive to report to the police, alarm temperature is fixed, fault-signal is complete, system install and maintenance work convenient not, equipment is fragile;
2) thermistor-type thermometric, utilize thermistor can measure cable temperature value, but be all analog output, the amplification and the A/D conversion that need to carry out signal could be received, each thermistor needs independently wiring, wiring is complicated and thermistor is fragile, maintenance is large, and sensor does not possess self-checking function;
3) infrared sensing formula thermometric, infrared sensing be utilize all temperature higher than absolute zero object all ceaselessly towards periphery space send infrared energy, the size of the infrared energy of object and have very close relationship by the distribution of wavelength and its surface temperature; Its shortcoming is comparatively large by the impact of object emission rate, environment and aerosol when thermometric, poor anti jamming capability;
4) thermojunction type thermometric, thermopair signal transmission need use special compensating line, and transmission range is unsuitable oversize, is not suitable with the actual conditions that cable end divides cloth cover very wide; Thermistor is generally platinum resistance, and three-wire type generally need be adopted to transmit, and balanced bridge formula exports, and transmission range is also unsuitable oversize, and jamproof ability is poor;
5) ic-type thermometric, the temperature element of integrated circuit type has polytype, wherein the element of current-output type has very large internal resistance, be suitable for long-distance transmissions, usual small volume, the heat conductive silica gel of available anticorrosion moistureproof high temperature resistance is sealed in measured some place, and external connection extracts transmission data by two lines, but larger by electromagnetic effect at measured point place;
For this reason, for power cable connector, need badly and a kind ofly to measure accurately, be not easily disturbed and there is the temperature monitoring system of Real-Time Monitoring ability.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of and measures accurately, is not easily disturbed and have power cable connector temperature monitoring composite cable and the monitoring system thereof of Real-Time Monitoring ability.
The purpose of this utility model is achieved in that
A kind of power cable connector temperature monitoring composite cable, composite cable includes and is set in temperature sensing optical fiber in beam tube and telecommunication optical fiber; Wrap tensile layer outside described beam tube, and be set with oversheath outside tensile layer.
A kind of power cable connector temperature monitoring of the utility model composite cable, the material of described tensile layer is aramid fiber.
A kind of power cable connector temperature monitoring of the utility model composite cable, described temperature sensing optical fiber is provided with one, telecommunication optical fiber at least two.
A kind of power cable connector temperature monitoring of the utility model composite cable, described telecommunication optical fiber is provided with three, and two normally use, and one for subsequent use.
A kind of power cable connector temperature monitoring system of the utility model, described system includes the composite cable arranged along power cable length direction, composite cable is wound on the power cable connector of power cable, temperature sensing optical fiber in described composite cable is connected to thermometric main frame, telecommunication optical fiber in described composite cable is connected to electric system Intranet, described thermometric main frame is articulated in electric system online, and is mounted with monitoring host computer and warning device on the net in electric system.
A kind of power cable connector temperature monitoring system of the utility model, described composite cable is bound on power cable.
Compared with prior art, the beneficial effects of the utility model are:
The utility model carries out real time temperature monitoring by distributed optical fiber temperature measurement technology to power cable, and compared to traditional approach, optical fiber is not vulnerable to the impacts such as the electromagnetism of surrounding enviroment, thus improves monitoring accuracy; And adopt composite cable form, thus while carrying out temperature monitoring, can also communicate, what decrease optical cable repeats laying, reduces construction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of power cable connector temperature monitoring system of the utility model.
Fig. 2 is the cross-sectional view of a kind of power cable connector temperature monitoring of the utility model composite cable.
Fig. 3 is the laying effect schematic diagram of composite cable and power cable in a kind of power cable connector temperature monitoring system of the utility model, power cable connector.
Fig. 4 is the sectional drawing of the electronic chart shown in a kind of power cable connector temperature monitoring system of the utility model.
Wherein:
Power cable 1, power cable connector 2, composite cable 3, thermometric main frame 4, electric system Intranet 5, monitoring host computer 6, warning device 7;
The canoe 1-1 of joint optical cable, composite cable fixed form 1-2;
Oversheath 3-1, tensile layer 3-2, temperature sensing optical fiber 3-3, beam tube 3-4, telecommunication optical fiber 3-5.
Embodiment
See Fig. 1 ~ 4, a kind of power cable connector temperature monitoring composite cable that the utility model relates to, composite cable 3 includes that to be set in temperature sensing optical fiber 3-3 in beam tube 3-4 and telecommunication optical fiber 3-5(preferred, temperature sensing optical fiber 3-3 is provided with one, telecommunication optical fiber 3-5 is provided with three, two normally use, and one for subsequent use); Wrap tensile layer 3-2 outside described beam tube 3-4, and be set with oversheath 3-1 outside tensile layer 3-2; Its material of tensile layer 3-2(of filling between oversheath 3-1 and beam tube 3-4 is aramid fiber) for playing the effect strengthening optical cable tensile intensity; Temperature sensing optical fiber 5 utilizes fiber raman scattering temperature-measurement principle to carry out temperature monitoring; And telecommunication optical fiber 3-5 is used for communication process;
A kind of power cable connector temperature monitoring system, described system includes the composite cable 3 arranged along power cable 1 length direction, and composite cable 3 is wound on the power cable connector 2 of power cable 1, and composite cable 3 is fixed on power cable 1 by modes such as bands; Temperature sensing optical fiber 3-3 in described composite cable 3 is connected to thermometric main frame 4, telecommunication optical fiber 3-5 in described composite cable 3 is connected to electric system Intranet 5, described thermometric main frame 4 is articulated in electric system Intranet 5, and electric system Intranet 5 is mounted with monitoring host computer 6 and warning device 7; During monitoring, temperature information transfers to thermometric main frame 4 through temperature sensing optical fiber 3-3 and analyzes, and telecommunication optical fiber 3-5 plays communication role simultaneously, and is connected by communication with electric system Intranet 5; Thus make a composite cable 3 achieve temperature monitoring and data communication facility simultaneously, what decrease optical cable repeats laying, reduces construction cost;
Monitoring principle of the present utility model is:
Utilize distributed optical fiber temperature measurement (DistributedTemperatureSensing) (DTS) technology to carry out temperature survey, its principle of work is:
DTS system utilizes unit cable to realize temperature monitoring and Signal transmissions simultaneously, comprehensive utilization Effect of Optical Fiber Raman Scatter (Ramanscattering) and optical time domain reflection measuring technique (OpticalTime-DomainReflectometry is called for short OTDR) obtain spatial temperature distribution information;
Wherein Effect of Optical Fiber Raman Scatter (Ramanscattering) is for realizing temperature survey, and optical time domain reflection measuring technique (OpticalTimeDomainReflectometer) is for realizing temperature location;
The temperature-measurement principle of DTS system is:
Laser light pulse is injected among the optical fiber of sensing, in light pulse communication process forward, due to reason generation scattering phenomenons such as the density of optical fiber, stress, material composition, temperature and flexural deformations, the scattered light of some can be propagated according to the direction that incident light is contrary, be referred to as back-scattering light, the back-scattering light returned comprises:
Rayleigh (RayLeigh) scattering, is caused by the subtle change of optical fibre refractivity, and its frequency is consistent with incident light pulse;
Raman (Raman) scattering, interacted by photon and optical phonon and cause, its frequency differs tens Terahertzs with incident light pulse;
Brillouin (Brillouin) scattering, is caused by elastic sound waves field low frequency phonon interaction in photon and optical fiber.Its frequency differs tens GHzs with incident light pulse;
For temperature detection demand, Rayleigh scattered signal is insensitive to temperature variation; The change of Brillouin scattered signal is relevant with temperature and stress, but signal stripping difficulty is large; The change of Raman scattered signal is relevant with temperature, and Raman scattered signal relatively easily obtains and analyzes, and therefore commercial Application mainly gathers Raman scattered signal and carries out temperature analysis;
Raman scattering can produce the signal of two different frequencies: Stokes (Stokes) light (light longer than optical source wavelength) and anti-Stokes (Anti-Stokes) light (light shorter than optical source wavelength), optical fiber makes the anti-Stokes in optical fiber (Anti-Stokes) light intensity change by the modulation of external temperature, the ratio of Anti-Stokes and Stokes provides the absolute instruction of temperature, utilizes this principle can realize the distributed measurement along fiber optic temperature field;
The positioning principle of DTS system is:
Optical time domain reflectance (OTDR) is initial for evaluating the performance of telecommunication optical fiber, optical cable and coupling mechanism, is the means for checking fibre loss, fiber failure.Generally DTS temperature-measurement principle and positioning principle are called ROTDR, its working mechanism is to the pulse of tested optical fiber utilizing emitted light, and Raman scattering phenomenon occurs, and forms back-scattering light and forward scattering light in a fiber; Wherein, back-scattering light back-propagation is to the initiating terminal (injection side of namely light pulse) of optical fiber, due to a scattering point on the corresponding optical fiber of each scattered light propagated dorsad, therefore, just can judge according to the traveling time of back-scattering light the position that optical fiber occurs scattering point;
d=(c×t)/2×(IOR)
Wherein, c is light speed in a vacuum, and t is to the T.T. receiving signal (round trip) after signal transmitting, and IOR is optical fibre refractivity.
The time and intensity information of the Raman back-reflection light produced during by gathering and analyze incident light pulse and propagating in optical fiber after one end (injection side) injection of optical fiber obtains corresponding position and temperature information, after the temperature learning every bit and positional information, just can obtain a temperature curve about the diverse location of whole optical fiber;
Thus by said system and principle, can obtain as temperature, positional information are presented on electronic chart by Fig. 4, be convenient to monitor staff and check.
In addition: it should be noted that above-mentioned embodiment is only a prioritization scheme of this patent, any change that those skilled in the art does according to above-mentioned design or improvement, all within the protection domain of this patent.

Claims (6)

1. a power cable connector temperature monitoring composite cable, is characterized in that: composite cable (3) includes and is set in temperature sensing optical fiber (3-3) in beam tube (3-4) and telecommunication optical fiber (3-5); Wrap tensile layer (3-2) outside described beam tube (3-4), and be set with oversheath (3-1) outside tensile layer (3-2).
2. a kind of power cable connector temperature monitoring composite cable as claimed in claim 1, is characterized in that: the material of described tensile layer (3-2) is aramid fiber.
3. a kind of power cable connector temperature monitoring composite cable as claimed in claim 1, is characterized in that: described temperature sensing optical fiber (3-3) is provided with one, telecommunication optical fiber (3-5) at least two.
4. a kind of power cable connector temperature monitoring composite cable as claimed in claim 3, is characterized in that: described telecommunication optical fiber (3-5) is provided with three, and two normally use, and one for subsequent use.
5. a power cable connector temperature monitoring system, it is characterized in that: described system includes the composite cable (3) arranged along power cable (1) length direction, composite cable (3) includes and is set in temperature sensing optical fiber (3-3) in beam tube (3-4) and telecommunication optical fiber (3-5); Wrap tensile layer (3-2) outside described beam tube (3-4), and be set with oversheath (3-1) outside tensile layer (3-2);
Composite cable (3) is wound on the power cable connector (2) of power cable (1), temperature sensing optical fiber (3-3) in described composite cable (3) is connected to thermometric main frame (4), telecommunication optical fiber (3-5) in described composite cable (3) is connected to electric system Intranet (5), described thermometric main frame (4) is articulated in electric system Intranet (5), and electric system Intranet (5) is mounted with monitoring host computer (6) and warning device (7).
6. a kind of power cable connector temperature monitoring system as claimed in claim 5, is characterized in that: described composite cable (3) is bound on power cable (1).
CN201520889474.6U 2015-11-10 2015-11-10 Power cable connects composite cable for temperature monitoring and monitoring system thereof Active CN205229527U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105301723A (en) * 2015-11-10 2016-02-03 江苏法尔胜光电科技有限公司 Composite optical cable used for power cable connector temperature monitoring and monitoring system thereof
CN108917967A (en) * 2018-07-12 2018-11-30 辽宁工程技术大学 A kind of goaf bound polyamine device and installation method
CN110926648A (en) * 2019-11-15 2020-03-27 神华粤电珠海港煤炭码头有限责任公司 High tension cable middle head optic fibre temperature measurement system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105301723A (en) * 2015-11-10 2016-02-03 江苏法尔胜光电科技有限公司 Composite optical cable used for power cable connector temperature monitoring and monitoring system thereof
CN108917967A (en) * 2018-07-12 2018-11-30 辽宁工程技术大学 A kind of goaf bound polyamine device and installation method
CN110926648A (en) * 2019-11-15 2020-03-27 神华粤电珠海港煤炭码头有限责任公司 High tension cable middle head optic fibre temperature measurement system

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