CN203629716U - Underground power transmission cable joint temperature real time online measuring device - Google Patents

Underground power transmission cable joint temperature real time online measuring device Download PDF

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Publication number
CN203629716U
CN203629716U CN201320791883.3U CN201320791883U CN203629716U CN 203629716 U CN203629716 U CN 203629716U CN 201320791883 U CN201320791883 U CN 201320791883U CN 203629716 U CN203629716 U CN 203629716U
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CN
China
Prior art keywords
transmission cable
cable joint
circulator
power transmission
underground 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.)
Expired - Fee Related
Application number
CN201320791883.3U
Other languages
Chinese (zh)
Inventor
许亮
朱洪东
曹宝夷
杜伯学
张庆超
高维钊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Tianjin Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201320791883.3U priority Critical patent/CN203629716U/en
Application granted granted Critical
Publication of CN203629716U publication Critical patent/CN203629716U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

An underground power transmission cable joint temperature real time online measuring device is provided; fiber gratings are paved in underground power transmission cable joint portions; all fiber gratings of all joints are connected in series through a single-mode fiber; an initial end of the single-mode fiber is connected with a circulator connected with a broadband light source; the circulator is also connected with a wavelength demodulator connected with a digitizer; the digitizer is connected with a computer. The beneficial effects are that the measuring device is simple in structure, easy to construct, can accurately measure temperature condition and accurate position of the underground power transmission cable joint, and the measurement is not affected by cable electric field.

Description

Underground transmission cable joint temperature real-time online measuring device
Technical field
The utility model belongs to sensing measurement technical field, relates in particular to a kind of underground transmission cable joint temperature real-time online measuring device.
Background technology
Be subject to the impact of processing technology, construction quality, operating condition and running environment, underground transmission cable and cable splice failure rate are higher.And the whether normal operation of direct relation transmission and distribution networks of the normal work of feeder cable, therefore, the measurement of underground transmission cable joint temperature online is one and is related to the problem that transmission of electricity normally moves safely, measure and can not directly be attached to the upper of power transmission conductor because of its Insulation Problems with electronic sensor, therefore can not reflect rapidly in time the true temperature of underground transmission cable conductor, this defect of electronic sensor can not be achieved underground transmission cable joint real-time measurement device of temperatures, adopt electronic sensor and transmitting device because be also metallic conductor simultaneously, with underground cable parallel laid, also destroyed the Electric Field Distribution of whole cable.Adopt the metering system of infrared imaging more can not reflect rapidly in time the true temperature of underground transmission cable conductor, can not reach real-time online measuring, therefore the utility model is filled up the blank of the surveying work of this urgency.
Utility model content:
The purpose of this utility model is to provide a kind of underground transmission cable joint temperature real-time online measuring device.Can not be subject to, under the prerequisite of electric field influence, to accurately measure underground transmission cable joint temperature conditions and accurate location.
The utility model is achieved in that
A kind of underground transmission cable joint temperature real-time online measuring device, it is characterized in that: at underground transmission cable joint, fiber grating is laid at place, adopt single-mode fiber to be together in series the fiber grating of all joints, connect circulator in single-mode fiber initial end, circulator connects wideband light source, circulator connects and also connects wavelengt demodulator, and wavelengt demodulator connects Aristogrid, and Aristogrid connects computing machine.
The utility model is beneficial effect:
Simple in structure, be easy to construction, monitoring is not subject to cable electric field influence, can accurately measure underground transmission cable joint temperature conditions and accurate location.
Accompanying drawing explanation
Fig. 1 is underground transmission cable joint temperature real-time online measuring device.
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
A kind of underground transmission cable joint temperature real-time online measuring device as shown in the figure, at underground transmission cable joint, fiber grating is laid at place, adopt single-mode fiber to be together in series the fiber grating of all joints, connect circulator in single-mode fiber initial end, circulator connects wideband light source, circulator connects and also connects wavelengt demodulator, and wavelengt demodulator connects Aristogrid, and Aristogrid connects computing machine.
Wherein,, a single-mode fiber 4, surrounding layer is without steel armour teflon stranding, according to 5 joint length of underground cable, be processed into grating 3 in the specific location of single-mode fiber in advance, the single mode fiber cable of the fiber grating processing 34 is attached to feeder cable, and grating descends transmission cable joint closely, and 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 utility model is like this work: according to formula: Δ λ b=k εε zλ bwith Δ λ b=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 in the joint of underground transmission cable temperature variation, the wavelength of its reflection changes with temperature with pm level, wavelengt demodulator judges the variation of the reflecting light wavelength that changes receiving by circulator, and change into digitizing wavelength value by what be connected Aristogrid with wavelengt demodulator, output to computing machine, by Computer calculate the temperature value of each joint and show and with alarm threshold comparison, send normal, early warning signal.
The utility model is work like this:
Wideband light source is constantly launched the light wave of 1550-1650nm to optical fiber by circulator, when in the joint of underground transmission cable temperature variation, the wavelength of its reflection changes with temperature with pm level, wavelengt demodulator judges the variation of the reflecting light wavelength that changes receiving by circulator, and change into digitizing wavelength value by what be connected Aristogrid with wavelengt demodulator, output to computing machine, by Computer calculate the temperature value of each joint and show and with alarm threshold comparison, send normal, early warning signal.

Claims (1)

1. a underground transmission cable joint temperature real-time online measuring device, it is characterized in that: at underground transmission cable joint, fiber grating is laid at place, adopt single-mode fiber to be together in series the fiber grating of all joints, connect circulator in single-mode fiber initial end, circulator connects wideband light source, circulator connects and also connects wavelengt demodulator, and wavelengt demodulator connects Aristogrid, and Aristogrid connects computing machine.
CN201320791883.3U 2013-12-04 2013-12-04 Underground power transmission cable joint temperature real time online measuring device Expired - Fee Related CN203629716U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320791883.3U CN203629716U (en) 2013-12-04 2013-12-04 Underground power transmission cable joint temperature real time online measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320791883.3U CN203629716U (en) 2013-12-04 2013-12-04 Underground power transmission cable joint temperature real time online measuring device

Publications (1)

Publication Number Publication Date
CN203629716U true CN203629716U (en) 2014-06-04

Family

ID=50816182

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320791883.3U Expired - Fee Related CN203629716U (en) 2013-12-04 2013-12-04 Underground power transmission cable joint temperature real time online measuring device

Country Status (1)

Country Link
CN (1) CN203629716U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
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
CN107024301A (en) * 2017-03-27 2017-08-08 中山大学 One kind condenses measurement of length devices and methods therefor based on condensation channel
CN110501079A (en) * 2018-05-16 2019-11-26 发那科株式会社 Temperature anomaly detection system, temperature anomaly detection cable and cable

Cited By (4)

* Cited by examiner, † Cited by third party
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
CN107024301A (en) * 2017-03-27 2017-08-08 中山大学 One kind condenses measurement of length devices and methods therefor based on condensation channel
CN110501079A (en) * 2018-05-16 2019-11-26 发那科株式会社 Temperature anomaly detection system, temperature anomaly detection cable and cable
CN110501079B (en) * 2018-05-16 2021-07-06 发那科株式会社 Temperature abnormality detection system, temperature abnormality detection cable, and cable

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140604

Termination date: 20191204