CN103632510A - Pre-warning system for preventing high-voltage underground long-distance-transmission power cable from being damaged by external force - Google Patents
Pre-warning system for preventing high-voltage underground long-distance-transmission power cable from being damaged by external force Download PDFInfo
- Publication number
- CN103632510A CN103632510A CN201310645792.3A CN201310645792A CN103632510A CN 103632510 A CN103632510 A CN 103632510A CN 201310645792 A CN201310645792 A CN 201310645792A CN 103632510 A CN103632510 A CN 103632510A
- Authority
- CN
- China
- Prior art keywords
- distance
- warning system
- circulator
- connects
- transmission power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A pre-warning system for preventing a high-voltage underground long-distance-transmission power cable from being damaged by external force. An optical grating is laid on the underground long-distance-transmission power cable at every other distance. All the optical gratings are sequentially serially connected from the first one through a single-mode optical fiber. An circulator which is connected with a broadband light source is connected to the initial end of the single-mode optical fiber. The circulator is further connected with a wavelength demodulator which is connected with a digitizer. The digitizer is connected with a computer. The pre-warning system has the advantages that the pre-warning system is simple in structure, easy to construct and lay, unaffected by electric fields, and accurate in measuring, monitoring and positioning.
Description
Technical field
The invention belongs to sensing technology and measure monitoring field, relate in particular to the early warning system of the anti-outside destroy of a kind of high-voltage underground long-distance power supply cable.
Background technology
Although high-voltage underground long-distance power supply cable has been saved ground resource, the outside destroy being also easily subject to, as: machinery digs wound, manpower digs wound, shield structure, near water pipe explosion etc.; Also the event that has artificial pilferage power cable, these have all had a strong impact on the normally stably operation of underground electric power transmission cable, affected users' at different levels normal electricity consumption, also affected the safety of surrounding area people's life and property, underground power cable is underground owing to being embedded in, and finds that looking up the fault point is difficult, maintenance time is long, maintenance is difficult, coverage is large.In order to monitor the early warning of the anti-outside destroy of high-voltage underground long-distance power supply cable, at present existing patented technology (200920251708.9) is although the real-time security monitoring device of high-voltage underground long-distance power supply cable can reach the safe early warning object of the anti-outside destroy of underground power cable, but this installation cost is high, be difficult for applying, and have also inaccurate shortcoming of the Monitoring and Positioning of measurement precision.
Summary of the invention
The early warning system that the object of this invention is to provide the anti-outside destroy of a kind of high-voltage underground long-distance power supply cable, the real-time security monitoring device cost that overcomes patented technology (200920251708.9) high-voltage underground long-distance power supply cable is high, be difficult for applying, and have also inaccurate shortcoming of the Monitoring and Positioning of measurement precision.Reach system simple, be easy to construction and lay, be not subject to electric field influence.Measure Monitoring and Positioning precision accurate.
Particular content of the present invention
The early warning system of the anti-outside destroy of a kind of high-voltage underground long-distance power supply cable, it is characterized in that: at underground transmission cable, every a segment distance, lay a fiber grating, adopt single-mode fiber to be from the beginning together in series successively all fiber gratings that lay, in single-mode fiber initial end, connect circulator, circulator connects wideband light source, circulator connects and also connects wavelengt demodulator, and wavelengt demodulator connects Aristogrid, and Aristogrid connects computing machine.
Beneficial effect of the present invention
The early warning system of the anti-outside destroy of this high-voltage underground long-distance power supply cable is simple in structure, is easy to construction and lays, and is not subject to electric field influence.Measure Monitoring and Positioning precision accurate.
Accompanying drawing explanation
Fig. 1 is the early warning system figure of the anti-outside destroy of high-voltage underground long-distance power supply cable.
In figure, 1 is wideband light source; 2 is circulator; 3 is fiber grating; 4 is single-mode fiber; 5 is underground cable; 6 is wavelengt demodulator; 7 is Aristogrid; 8 is computing machine.
Embodiment
The early warning system of the anti-outside destroy of a kind of high-voltage underground long-distance power supply cable as shown in the figure, at underground transmission cable, every a segment distance, lay a fiber grating, adopt single-mode fiber to be from the beginning together in series successively all fiber gratings that lay, in single-mode fiber initial end, connect circulator, circulator connects wideband light source, circulator connects and also connects wavelengt demodulator, and wavelengt demodulator connects Aristogrid, and Aristogrid connects computing machine.
Wherein, article one, single-mode fiber 4, surrounding layer is without steel armour teflon stranding, according to 5 length of underground cable, at the ad-hoc location (as 50 meters, interval) of single-mode fiber, locate to be processed into grating 3 in advance, the single mode fiber cable of the fiber grating processing 34 and feeder cable are laid with ditch, 20 centimetres of both distances, optical fiber one end is connected with circulator 2, circulator 2 one end and wideband light source 1, the other end is connected with wavelengt demodulator 6, and wavelengt demodulator is connected with Aristogrid 7, and Aristogrid 7 joins with computing machine 8.
The present invention is like this work: according to formula: Δ λ
b=k
εε
zλ
bwith Δ λ
b=k
tΔ T λ
bhere coefficient of strain ε
zwith temperature coefficient k
ttitle can be associated with a lot of physical quantitys, as temperature,
Vibrations etc., that is to say and can realize the measurement to temperature, strain, vibration physical quantity by designing the device of various engineering properties.Wideband light source is constantly launched the light wave of 1550-1650nm to optical fiber by circulator, when joint temperature variation at underground transmission cable, with excited vibration, there is the variation with pm level in the wavelength of its reflection, the reflecting light wavelength changing that wavelengt demodulator fast demodulation receives by circulator is with the variation of pm level, and change into digitizing wavelength with pm level value by what be connected Aristogrid with wavelengt demodulator, output to computing machine, by Computer, being calculated the vibration values of each optical grating point composes and shows, and compose threshold value comparison with alarm, send normal, early warning signal.Reach the object of the early warning of the anti-outside destroy of high-voltage underground long-distance power supply cable.
The present invention is such principle of work and the course of work:
According to formula: Δ λ
b=k
εε
zλ
bwith Δ λ
==k
tΔ T λ
b
Here coefficient of strain ε
zwith temperature coefficient k
ttitle can be associated with a lot of physical quantitys, as temperature, vibration etc., that is to say and can realize the measurement to temperature, strain, vibration physical quantity by designing the device of various engineering properties.Wideband light source is constantly launched the light wave of 1550-1650nm to optical fiber by circulator, when joint temperature variation at underground transmission cable, with excited vibration, there is the variation with pm level in the wavelength of its reflection, the reflecting light wavelength changing that wavelengt demodulator fast demodulation receives by circulator is with the variation of pm level, and change into digitizing wavelength with pm level value by what be connected Aristogrid with wavelengt demodulator, output to computing machine, by Computer, being calculated the vibration values of each optical grating point composes and shows, and compose threshold value comparison with alarm, send normal, early warning signal.Reach the object of the early warning of the anti-outside destroy of high-voltage underground long-distance power supply cable.
Claims (1)
1. the early warning system of the anti-outside destroy of high-voltage underground long-distance power supply cable, it is characterized in that: at underground transmission cable, every a segment distance, lay a fiber grating, adopt single-mode fiber to be from the beginning together in series successively all fiber gratings that lay, in single-mode fiber initial end, connect circulator, circulator connects wideband light source, circulator connects and also connects wavelengt demodulator, and wavelengt demodulator connects Aristogrid, and Aristogrid connects computing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310645792.3A CN103632510A (en) | 2013-12-04 | 2013-12-04 | Pre-warning system for preventing high-voltage underground long-distance-transmission power cable from being damaged by external force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310645792.3A CN103632510A (en) | 2013-12-04 | 2013-12-04 | Pre-warning system for preventing high-voltage underground long-distance-transmission power cable from being damaged by external force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103632510A true CN103632510A (en) | 2014-03-12 |
Family
ID=50213506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310645792.3A Pending CN103632510A (en) | 2013-12-04 | 2013-12-04 | Pre-warning system for preventing high-voltage underground long-distance-transmission power cable from being damaged by external force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103632510A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630264A (en) * | 2013-12-04 | 2014-03-12 | 国家电网公司 | Underground power transmission cable connector temperature real-time online measurement system |
| CN104964707A (en) * | 2015-01-14 | 2015-10-07 | 四川安普光控科技有限公司 | All-fiber sensing integrated monitoring system applied to electric power tunnels |
| CN105528854A (en) * | 2014-09-30 | 2016-04-27 | 国家电网公司 | External force damage prevention system for power cable |
| CN111780855A (en) * | 2020-05-26 | 2020-10-16 | 山东大学 | Cable external-damage-prevention method and system based on fiber radial vibration source ranging vibration identification |
| CN113295355A (en) * | 2021-04-15 | 2021-08-24 | 广西电网有限责任公司南宁供电局 | Ground cable channel monitoring device with abnormal vibration early warning function |
| CN113437796A (en) * | 2021-05-24 | 2021-09-24 | 国网河北省电力有限公司涉县供电分公司 | Intelligent early warning cable system |
| CN113936438A (en) * | 2021-10-12 | 2022-01-14 | 国家电网有限公司 | Underground cable operating environment monitoring and early warning device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052193A1 (en) * | 1980-11-14 | 1982-05-26 | International Business Machines Corporation | Security arrangement against theft or tampering of electrical apparatus |
| CN1236234A (en) * | 1999-04-30 | 1999-11-24 | 诺斯坎仪器有限公司 | Fiber optic cable monitoring system |
| CN101566586A (en) * | 2008-04-22 | 2009-10-28 | 宁波诺可电子科技发展有限公司 | External safety early-warning and positioning system of optical cable and optical-electrical compound cable |
| CN201662859U (en) * | 2010-05-04 | 2010-12-01 | 武巍 | Light-guide fiber monitoring and alarming system for cable fault, stealing and pipeline damage |
| CN101916492A (en) * | 2010-08-10 | 2010-12-15 | 卢军翔 | Optical fiber intelligent sensor used in security system |
| CN203165121U (en) * | 2013-01-29 | 2013-08-28 | 广州供电局有限公司 | Power cable anti-damage monitoring system |
-
2013
- 2013-12-04 CN CN201310645792.3A patent/CN103632510A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052193A1 (en) * | 1980-11-14 | 1982-05-26 | International Business Machines Corporation | Security arrangement against theft or tampering of electrical apparatus |
| CN1236234A (en) * | 1999-04-30 | 1999-11-24 | 诺斯坎仪器有限公司 | Fiber optic cable monitoring system |
| CN101566586A (en) * | 2008-04-22 | 2009-10-28 | 宁波诺可电子科技发展有限公司 | External safety early-warning and positioning system of optical cable and optical-electrical compound cable |
| CN201662859U (en) * | 2010-05-04 | 2010-12-01 | 武巍 | Light-guide fiber monitoring and alarming system for cable fault, stealing and pipeline damage |
| CN101916492A (en) * | 2010-08-10 | 2010-12-15 | 卢军翔 | Optical fiber intelligent sensor used in security system |
| CN203165121U (en) * | 2013-01-29 | 2013-08-28 | 广州供电局有限公司 | Power cable anti-damage monitoring system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630264A (en) * | 2013-12-04 | 2014-03-12 | 国家电网公司 | Underground power transmission cable connector temperature real-time online measurement system |
| CN105528854A (en) * | 2014-09-30 | 2016-04-27 | 国家电网公司 | External force damage prevention system for power cable |
| CN104964707A (en) * | 2015-01-14 | 2015-10-07 | 四川安普光控科技有限公司 | All-fiber sensing integrated monitoring system applied to electric power tunnels |
| CN111780855A (en) * | 2020-05-26 | 2020-10-16 | 山东大学 | Cable external-damage-prevention method and system based on fiber radial vibration source ranging vibration identification |
| CN113295355A (en) * | 2021-04-15 | 2021-08-24 | 广西电网有限责任公司南宁供电局 | Ground cable channel monitoring device with abnormal vibration early warning function |
| CN113437796A (en) * | 2021-05-24 | 2021-09-24 | 国网河北省电力有限公司涉县供电分公司 | Intelligent early warning cable system |
| CN113936438A (en) * | 2021-10-12 | 2022-01-14 | 国家电网有限公司 | Underground cable operating environment monitoring and early warning device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103632510A (en) | Pre-warning system for preventing high-voltage underground long-distance-transmission power cable from being damaged by external force | |
| CN109000157B (en) | Online monitoring device and method for pipeline | |
| CN101592475B (en) | Fully distributed fiber Rayleigh and Raman scattering photon strain and temperature sensor | |
| CN103821507B (en) | Shaft wall distortion distribution type fiber-optic detection method | |
| CN104343466B (en) | All-fiber coal mine safety monitoring system | |
| CN203310540U (en) | Temperature and strain on-line monitoring device integrating optical phase conductors | |
| CN201885733U (en) | Ultra-long-range fully-distributed optical fiber Rayleigh and Raman scattering sensor fused with optical fiber Raman frequency shifter | |
| CN102080954B (en) | Ultra-long range 100km decentralized optical fiber Rayleigh and Raman scattering sensor | |
| CN204202777U (en) | A kind of device of comprehensive monitoring subsea cable safety | |
| CN111536892A (en) | Underground pipeline monitoring system and monitoring method based on distributed optical fiber sensing | |
| CN102080953A (en) | Ultra-long-range (ULR) full-distributed optical Rayleigh and Raman scattering sensor fused with optical Raman frequency shifter | |
| CN104596576A (en) | Optical fiber temperature sensing and vibration sensing collineation fusion system and monitoring method | |
| CN102589459A (en) | Fully-distributed optical fiber sensor in combination of optical fiber Raman frequency shifter and Raman amplifier | |
| CN101818640A (en) | Fully distributed device and method for monitoring underground working temperature of oil-water well based on Raman scattered light time-domain reflectometer | |
| CN111024283B (en) | Multi-parameter optical fiber sensing detection method and system for down-leading optical cable | |
| CN103822737A (en) | Optical fiber bragg grating transmission line on-line monitoring device and method | |
| CN203629716U (en) | Underground power transmission cable joint temperature real time online measuring device | |
| CN102393263A (en) | Cable tunnel fiber online temperature monitoring system | |
| CN103177531B (en) | Along Railway mud-stone flow disaster is monitored | |
| CN201917352U (en) | Fiber grating sensing device used for monitoring landslide retaining wall | |
| CN205229527U (en) | Power cable connects composite cable for temperature monitoring and monitoring system thereof | |
| CN211926782U (en) | Underground pipeline monitoring system based on distributed optical fiber sensing | |
| Hartog | Raman sensors and their applications | |
| CN107304673A (en) | Oil/gas Well monitors tubing string | |
| CN102322886A (en) | Pulse coding extra-long distance fully-distributed fiber Rayleigh and Raman scattering sensor of fusion fiber Raman frequency shift device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140312 |