CN103323138A - Distribution type optical fiber monitoring method for monitoring cables of power distribution network - Google Patents
Distribution type optical fiber monitoring method for monitoring cables of power distribution network Download PDFInfo
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- CN103323138A CN103323138A CN2013102009913A CN201310200991A CN103323138A CN 103323138 A CN103323138 A CN 103323138A CN 2013102009913 A CN2013102009913 A CN 2013102009913A CN 201310200991 A CN201310200991 A CN 201310200991A CN 103323138 A CN103323138 A CN 103323138A
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Abstract
The invention relates to a distribution type optical fiber monitoring method for monitoring cables of a power distribution network and belongs to the technical field of optoelectronic measurement. Optical fibers are paved along the cables of the power distribution network, the optical fibers along the cables of the power distribution network are monitored through the Raman scattering technology and the Brillouin scattering technology at the same time, the temperature and the strain of the cables are reflected through the temperature and the strain of the optical fibers along the cables of the power distribution network, therefore, the temperature and the strain of the cables of the power distribution network are obtained, and early warning of potential safety hazards and positioning of failure points are conducted. The failure points of the cables of the power distribution network are positioned through the Brillouin scattering technology or the Raman scattering technology. Sensibility of Brillouin scattering towards the strain and the temperature and sensibility of Raman scattering towards the temperature are adopted to achieve real-time on-line monitoring for the temperature and the strain of the cables of the power distribution network. The positioning function of the Brillouin scattering or the positioning function of the Raman scattering is used for positioning the failure points of the cables of the power distribution network.
Description
Technical field
The present invention relates to a kind of distributed optical fiber sensing method that the power distribution network cable is monitored, belong to the photoelectron field of measuring technique.
Background technology
Power cable has that power supply reliability is high, the impact that is not subjected to ground and space buildings thing, be not subjected to that the weather extremes infringement affects, the advantage such as safe, hidden, durable, and proportion is increasing in the distribution of city.The reasons such as local defect abominable owing to service condition, when making and installing very easily cause the cable local temperature to increase the electric power accidents such as initiation fire, blast.Along with the dynamic compatibilization of the increase cable of power consumption becomes a trend, will cause the especially excess Temperature in cable splice and knee of cable but the transmission line capability of cable is excessive, easily cause short circuit and explosion accident.The deformation that the pulling force that temperature Change and external environment condition cause or soil shrinkage all may make high-tension cable produce vertical or cement pipe may cause the fracture of high-tension cable armouring, lead (aluminium) sheath when serious even fractures.The development of municipal works also produces significant threat to the safety of power distribution network cable.If can carry out the generation that on-line monitoring just might reduce this class accident to cable, traditional on-line monitoring method mainly is to adopt electronic sensor, the method easily is subject to electromagnetic interference (EMI), and because the power supply supply problem can't be realized for a long time, real time on-line monitoring, and owing to measurement point is difficult for accomplishing accurate location to the trouble spot less.
A kind of on-line monitoring method that approaches the most with the present invention is to adopt the Raman scattering technology to carry out on-line monitoring, this kind method can be carried out timely early warning and localization of fault to the cable temperature class accident that raises, but some potential safety hazard of cable only has the phenomenon of strain increase and without the characteristics that temperature raises, only adopts the Raman scattering technology can't realize such hidden danger is effectively monitored.
Summary of the invention
The object of the invention is to solve the on-line monitoring problem of power distribution network cable.
The object of the present invention is achieved like this:
A kind of distributed optical fiber sensing method that the power distribution network cable is monitored, the present invention is along power distribution network cable laying optical fiber, use Brillouin scattering technology and Raman scattering technology simultaneously power distribution network cable optical fiber along the line to be monitored, use the temperature of power distribution network cable optical fiber along the line and temperature and the strain of strain reflection cable, thereby obtain temperature and the strain of power distribution network cable, carry out potential safety hazard early warning and localization of fault.
The present invention combines closely optical fiber and cable along power distribution network cable laying optical fiber, and the temperature of cable and optical fiber and strain are consistent as far as possible.
The present invention uses Brillouin scattering technology and Raman scattering technology that power distribution network cable optical fiber along the line is monitored simultaneously, use the Raman scattering technology that the Brillouin scattering technology is carried out temperature compensation, thereby separate temperature and two parameters of strain of power distribution network cable optical fiber along the line.
The present invention uses Raman scattering technology or Brillouin scattering technology that the trouble spot in the power distribution network cable is positioned.
The present invention lays optical fiber along the line at the power distribution network cable, optical fiber and cable are combined closely, temperature and the strain of optical fiber and cable are consistent as far as possible, with the temperature of optical fiber and temperature and the strain of strain reflection cable, adopt Raman scattering technology and Brillouin scattering technology that power distribution network cable optical fiber along the line is monitored, use the Brillouin scattering technology that temperature and the strain of power distribution network cable optical fiber along the line are monitored, use the Raman scattering technology that the temperature of power distribution network cable optical fiber along the line is monitored, come the result of Brillouin scattering is carried out temperature compensation with the temperature measurement result of Raman scattering, thereby isolate temperature and two parameters of strain of power distribution network cable optical fiber along the line, reflect temperature and the strain of power distribution network cable with this, potential safety hazard to the power distribution network cable is carried out early warning, and uses Brillouin scattering technology or Raman scattering technology that the trouble spot of power distribution network cable is positioned.
Beneficial effect of the present invention
:1. realized the distributed monitoring to the power distribution network cable: two kinds of monitoring technology of Brillouin scattering and Raman scattering all are the distributed monitoring technology, can realize distributed monitoring to the power distribution network cable.
2. to temperature and the two parameter measurements of strain: temperature and strain can be measured simultaneously in conjunction with Brillouin scattering and two kinds of technology of Raman scattering, and the two is separated.
3. accurately locate the trouble spot: Brillouin scattering and Raman scattering all have the function of high precision localization of fault, use any in two kinds of technology can realize trouble spot high precision, timely location.
4. passive, long-time monitoring: because the measuring distance of two kinds of monitoring technology is all larger, monitoring equipment can be placed on that get can easily be local, can realize the passive monitoring on the whole power distribution network cable line, has guaranteed the long-time property of monitoring.
Embodiment
A kind of distributed optical fiber sensing method that the power distribution network cable is monitored, the present invention is along power distribution network cable laying optical fiber, use Brillouin scattering technology and Raman scattering technology simultaneously power distribution network cable optical fiber along the line to be monitored, use the temperature of power distribution network cable optical fiber along the line and temperature and the strain of strain reflection cable, thereby obtain temperature and the strain of power distribution network cable, carry out potential safety hazard early warning and localization of fault.
The present invention combines closely optical fiber and cable along power distribution network cable laying optical fiber, and the temperature of cable and optical fiber and strain are consistent as far as possible.
The present invention uses Brillouin scattering technology and Raman scattering technology that power distribution network cable optical fiber along the line is monitored simultaneously, use the Raman scattering technology that the Brillouin scattering technology is carried out temperature compensation, thereby separate temperature and two parameters of strain of power distribution network cable optical fiber along the line.
The present invention uses Raman scattering technology or Brillouin scattering technology that the trouble spot in the power distribution network cable is positioned.
The present invention lays optical fiber along the line at the power distribution network cable, optical fiber and cable are combined closely, temperature and the strain of optical fiber and cable are consistent as far as possible, with the temperature of optical fiber and temperature and the strain of strain reflection cable, adopt Raman scattering technology and Brillouin scattering technology that power distribution network cable optical fiber along the line is monitored, use the Brillouin scattering technology that temperature and the strain of power distribution network cable optical fiber along the line are monitored, use the Raman scattering technology that the temperature of power distribution network cable optical fiber along the line is monitored, come the result of Brillouin scattering is carried out temperature compensation with the temperature measurement result of Raman scattering, thereby isolate temperature and two parameters of strain of power distribution network cable optical fiber along the line, reflect temperature and the strain of power distribution network cable with this, and come the potential safety hazard of power distribution network cable is carried out early warning according to temperature and two parameters of strain, use Brillouin scattering technology or Raman scattering technology that the trouble spot of power distribution network cable is positioned.The method both can realize the giving warning in advance of the potential safety hazard of power distribution network cable, and can in time position the trouble spot after fault occurs again, and was significant to guaranteeing power supply reliability.
Claims (4)
1. distributed optical fiber sensing method that the power distribution network cable is monitored, it is characterized in that: along power distribution network cable laying optical fiber, use Brillouin scattering technology and Raman scattering technology simultaneously power distribution network cable optical fiber along the line to be monitored, use the temperature of power distribution network cable optical fiber along the line and temperature and the strain of strain reflection cable, thereby obtain temperature and the strain of power distribution network cable, carry out potential safety hazard early warning and localization of fault.
2. by the distributed optical fiber sensing method that the power distribution network cable is monitored claimed in claim 1, it is characterized in that: along power distribution network cable laying optical fiber, optical fiber and cable are combined closely, the temperature of cable and optical fiber and strain are consistent.
3. by the distributed optical fiber sensing method that the power distribution network cable is monitored claimed in claim 1, it is characterized in that: use simultaneously Brillouin scattering technology and Raman scattering technology that power distribution network cable optical fiber along the line is monitored, use the Raman scattering technology that the Brillouin scattering technology is carried out temperature compensation, thereby separate temperature and two parameters of strain of power distribution network cable optical fiber along the line.
4. by the distributed optical fiber sensing method that the power distribution network cable is monitored claimed in claim 1, it is characterized in that: use Raman scattering technology or Brillouin scattering technology that the trouble spot in the power distribution network cable is positioned.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102009913A CN103323138A (en) | 2013-05-27 | 2013-05-27 | Distribution type optical fiber monitoring method for monitoring cables of power distribution network |
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| CN2013102009913A CN103323138A (en) | 2013-05-27 | 2013-05-27 | Distribution type optical fiber monitoring method for monitoring cables of power distribution network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443228A (en) * | 2018-11-16 | 2019-03-08 | 中国电力科学研究院有限公司 | Submarine cable armoring layer deformation monitoring system, device and method |
| CN113011015A (en) * | 2021-03-04 | 2021-06-22 | 国网浙江省电力有限公司嘉兴供电公司 | Safety control method for dynamic capacity increase of power transmission and transformation line |
| CN113970381A (en) * | 2021-10-25 | 2022-01-25 | 上海交通大学 | Temperature and stress monitoring device and method suitable for high-temperature superconducting cable |
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| WO2007037366A1 (en) * | 2005-09-29 | 2007-04-05 | Sumitomo Electric Industries, Ltd. | Sensor and external turbulence measuring method using the same |
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| CN109443228A (en) * | 2018-11-16 | 2019-03-08 | 中国电力科学研究院有限公司 | Submarine cable armoring layer deformation monitoring system, device and method |
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Application publication date: 20130925 |