CN110926648A - High tension cable middle head optic fibre temperature measurement system - Google Patents

High tension cable middle head optic fibre temperature measurement system Download PDF

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Publication number
CN110926648A
CN110926648A CN201911121214.3A CN201911121214A CN110926648A CN 110926648 A CN110926648 A CN 110926648A CN 201911121214 A CN201911121214 A CN 201911121214A CN 110926648 A CN110926648 A CN 110926648A
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CN
China
Prior art keywords
cable
data
temperature
electrically
temperature measurement
Prior art date
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Pending
Application number
CN201911121214.3A
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Chinese (zh)
Inventor
刘炜桁
武猛
赵斌
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.)
Shenhua Yuedian Zhuhai Port Coal Terminal Co Ltd
Original Assignee
Shenhua Yuedian Zhuhai Port Coal Terminal 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 Shenhua Yuedian Zhuhai Port Coal Terminal Co Ltd filed Critical Shenhua Yuedian Zhuhai Port Coal Terminal Co Ltd
Priority to CN201911121214.3A priority Critical patent/CN110926648A/en
Publication of CN110926648A publication Critical patent/CN110926648A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres

Abstract

The invention discloses a high-voltage cable middle head optical fiber temperature measuring system, which comprises: the detection optical cable is arranged on the outer surface of the cable joint and is used for acquiring temperature data of each temperature measuring point on the cable in real time; the data processing terminal is electrically connected with the detection optical cable and is used for receiving the temperature data and arranging the temperature data into real-time temperature distribution curve data; and the monitoring PC end is electrically connected with the data processing terminal and is used for displaying the real-time temperature distribution curve data in real time. The invention can realize real-time online monitoring of the temperature condition of the cable middle head, ensures the operation safety of the cable, and has long service life and lower production cost.

Description

High tension cable middle head optic fibre temperature measurement system
Technical Field
The invention relates to the technical field of cable monitoring, in particular to a high-voltage cable middle head optical fiber temperature measuring system.
Background
The power cable is one of the largest matching industries in national economy, is the basis of various industries, and the product of the power cable is widely applied to the fields of electric power, buildings, ships, petrochemical industry and the like and is closely related to the development of national economy. Along with the development of urban construction, the power cable is widely applied due to the advantages of safe and reliable power supply, convenience for urban beautification and the like. When the power cable runs continuously for a long time, the temperature is easily increased at the cable joint position, the cable bending position and the cable arrangement dense position, and the cable fault is possibly caused by the continuous overhigh temperature. The area of an enterprise factory is large, and a part of high-voltage cable lines are too long, so that a high-voltage cable intermediate joint exists, the cable intermediate joint is a weak point in the aspect of power cable safety, particularly, fire safety hazards exist, the power supply cable in the whole bridge is influenced, and the power guarantee is possibly greatly influenced.
Disclosure of Invention
The invention aims to solve the technical problems that aiming at the defects in the prior art, the invention provides the optical fiber temperature measuring system for the middle head of the high-voltage cable, which can realize real-time online monitoring of the temperature condition of the middle head of the cable, ensure the running safety of the cable, and has long service life and lower production cost.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a high-voltage cable middle head optical fiber temperature measurement system comprises: the detection optical cable is arranged on the outer surface of the cable joint and is used for acquiring temperature data of each temperature measuring point on the cable in real time; the data processing terminal is electrically connected with the detection optical cable and is used for receiving the temperature data and arranging the temperature data into real-time temperature distribution curve data; and the monitoring PC end is electrically connected with the data processing terminal and is used for displaying the real-time temperature distribution curve data in real time.
Preferably, the temperature measuring point comprises a cable tunnel, a cable bridge, a cable interlayer and a cable joint.
Preferably, the high-voltage cable middle head optical fiber temperature measurement system further comprises a data storage module electrically connected with the detection optical cable and the data processing terminal respectively, and the data storage module is used for storing the temperature data and the real-time temperature distribution curve data.
Preferably, the data processing terminal comprises an analog-to-digital signal conversion unit, a central processing unit and a digital-to-analog conversion unit, wherein an output end of the analog-to-digital signal conversion unit is electrically connected with an input end of the central processing unit, and an output end of the central processing unit is electrically connected with an input end of the digital-to-analog conversion unit.
Preferably, the detection optical cable is further configured to filter a pulsed light source signal of the temperature measurement point and obtain the temperature data according to the pulsed light source signal.
Preferably, the monitoring PC end includes a data receiving module and a display module electrically connected to the data receiving module, and the data module receiving module is configured to receive the temperature distribution curve data in real time and send the temperature distribution curve data to the display module for display.
Preferably, the high-voltage cable middle head optical fiber temperature measuring system further comprises an alarm unit electrically connected with the data processing terminal, and the alarm unit is used for judging whether the temperature of each temperature measuring point is within a set threshold range according to the temperature data, and if not, sending an alarm signal.
By adopting the technical scheme, the detection optical cable in the high-voltage cable intermediate head optical fiber temperature measurement system is arranged on the outer surface of a cable joint and is used for collecting temperature data of each temperature measurement point on the cable in real time; the data processing terminal is electrically connected with the detection optical cable and used for receiving the temperature data and arranging the temperature data into real-time temperature distribution curve data; the monitoring PC end is electrically connected with the data processing terminal and is used for displaying real-time temperature distribution curve data in real time; the temperature condition of the cable middle head can be monitored online in real time, the running safety of the cable is ensured, the temperature of each temperature measuring point can be measured in a continuous distributed mode through the detection optical cable, the electromagnetic interference resistance can be realized, the high-voltage cable middle head optical fiber temperature measuring system can work normally in a high electromagnetic environment, the measuring distance is long, and the high-voltage cable middle head optical fiber temperature measuring system is suitable for remote monitoring; and has long service life and lower production cost.
Drawings
FIG. 1 is a block diagram of the present invention;
in the figure, 1-detection optical cable, 2-data processing terminal, 3-monitoring PC terminal, 4-data storage module and 5-alarm unit.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
As shown in fig. 1, in a structural block diagram of a high-voltage cable middle head optical fiber temperature measurement system of the present invention, the high-voltage cable middle head optical fiber temperature measurement system includes a detection optical cable 1, a data processing terminal 2, a monitoring PC terminal 3, a data storage module 4 and an alarm unit 5, the detection optical cable 1 is installed on an outer surface of a cable joint, the data processing terminal 2 is electrically connected with the detection optical cable 1, both the monitoring PC terminal 3 and the alarm unit 5 are electrically connected with the data processing terminal 2, and the storage module 4 is electrically connected with the detection optical cable 1 and the data processing terminal 2 respectively; the detection optical cable 1 is used for collecting temperature data of each temperature measuring point on the cable in real time, and the data processing terminal 2 is used for receiving the temperature data and arranging the temperature data into real-time temperature distribution curve data; the monitoring PC terminal 3 is used for displaying the real-time temperature distribution curve data in real time, and the data storage module 4 is used for storing the temperature data and the real-time temperature distribution curve data. It will be understood that the temperature measurement points include the cable tunnels, the cable trays, the cable interlayers and the cable joints of the power supply cables within the entire tray.
Specifically, the data processing terminal 2 comprises an analog-digital signal conversion unit, a central processing unit and a digital-analog conversion unit, wherein the output end of the analog-digital signal conversion unit is electrically connected with the input end of the central processing unit, and the output end of the central processing unit is electrically connected with the input end of the digital-analog conversion unit; the analog-digital signal conversion unit is used for converting the acquired analog signals into digital signals and sending the digital signals to the central processing unit for analysis and processing, the central processing unit is used for listing real-time temperature distribution curves according to the digital signals and outputting the real-time temperature distribution curves as digital signals, the digital-analog conversion unit is used for converting the digital signals into analog signals and outputting the analog signals, and the central processing unit can be a single chip microcomputer and the like. The detection optical cable 1 is also used for filtering the pulse light source signal of the temperature measuring point and acquiring the temperature data according to the pulse light source signal; the monitoring PC terminal 3 comprises a data receiving module and a display module electrically connected with the data receiving module, wherein the data receiving module is used for receiving the temperature distribution curve data in real time and sending the temperature distribution curve data to the display module for displaying, and the display module can be a liquid crystal display and the like; the alarm unit 5 is used for judging whether the temperature of each temperature measuring point is within a set threshold range according to the temperature data, and if not, sending an alarm signal so as to remind a worker. It can be understood that, the high-voltage cable middle head optical fiber temperature measurement system can carry out real-time online temperature monitoring on all the cable tunnels, cable bridges, cable interlayers, cable joints and other parts by adopting one (or more) detection optical cables 1, display the real-time temperature distribution curve of the monitored area on a monitoring PC, monitor the temperature change of each area in real time, and achieve the purpose of prevention. In the practical application process, the detection optical cable 1 is arranged on the outer surface of the power cable joint to be measured, so that the temperature distribution conditions of the cable joint and each temperature measuring point can be obtained, real-time online monitoring is realized, and the running safety of the cable is ensured; the principle of fiber optic thermometry is based on the backward Raman (Raman) scattering effect. Scattering occurs through the interaction of the laser pulses with the fiber molecules, and there are a number of scattering types, such as: rayleigh (Rayleigh) scattering, Brillouin (Brillouin) scattering, Raman (Raman) scattering, and the like. Where raman scattering is due to thermal vibration of the fiber molecules, it produces a light at a wavelength longer than the source wavelength, called Stokes (Stokes) light, and a light at a wavelength shorter than the source wavelength, called Anti-Stokes (Anti-Stokes) light. The optical fiber is modulated by external temperature to change the Anti-Stokes light intensity in the optical fiber, the ratio of the Anti-Stokes to the Stokes provides absolute indication of the temperature, the distributed measurement of the temperature field along the optical fiber can be realized by utilizing the principle, and the accurate temperature values of all points on the optical fiber cable can be obtained by combining a high-quality pulse light source and a high-speed signal acquisition and processing technology.
The invention has the advantages of reasonable design and unique structure, the temperature of each point is reflected in real time by monitoring the temperature of the cable middle head through the detection optical cable 1, the safety state of each cable middle head is further analyzed and judged, the measurement distance is long, the invention is suitable for remote monitoring, and the invention has important significance for ensuring safe power supply.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims (7)

1. The utility model provides a first optic fibre temperature measurement system in middle of high tension cable which characterized in that includes: the detection optical cable is arranged on the outer surface of the cable joint and is used for acquiring temperature data of each temperature measuring point on the cable in real time; the data processing terminal is electrically connected with the detection optical cable and is used for receiving the temperature data and arranging the temperature data into real-time temperature distribution curve data; and the monitoring PC end is electrically connected with the data processing terminal and is used for displaying the real-time temperature distribution curve data in real time.
2. The high-voltage cable middle head optical fiber temperature measurement system according to claim 1, wherein the temperature measurement point comprises a cable tunnel, a cable bridge, a cable interlayer and a cable joint.
3. The optical fiber temperature measurement system for the middle head of the high-voltage cable according to claim 1, further comprising a data storage module electrically connected to the detection optical cable and the data processing terminal, respectively, for storing the temperature data and the real-time temperature distribution curve data.
4. The optical fiber temperature measurement system for the middle head of a high-voltage cable according to claim 1, wherein the data processing terminal comprises an analog-to-digital signal conversion unit, a central processing unit and a digital-to-analog conversion unit, an output end of the analog-to-digital signal conversion unit is electrically connected with an input end of the central processing unit, and an output end of the central processing unit is electrically connected with an input end of the digital-to-analog conversion unit.
5. The high-voltage cable middle head optical fiber temperature measurement system according to claim 1, wherein the detection optical cable is further configured to filter a pulsed light source signal of the temperature measurement point and obtain the temperature data according to the pulsed light source signal.
6. The optical fiber temperature measurement system for the middle head of the high-voltage cable according to claim 1, wherein the monitoring PC end comprises a data receiving module and a display module electrically connected with the data receiving module, and the data receiving module is used for receiving the temperature distribution curve data in real time and sending the temperature distribution curve data to the display module for display.
7. The optical fiber temperature measurement system for the middle head of the high-voltage cable according to claim 1, further comprising an alarm unit electrically connected to the data processing terminal, for determining whether the temperature of each temperature measurement point is within a set threshold range according to the temperature data, and if not, sending an alarm signal.
CN201911121214.3A 2019-11-15 2019-11-15 High tension cable middle head optic fibre temperature measurement system Pending CN110926648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911121214.3A CN110926648A (en) 2019-11-15 2019-11-15 High tension cable middle head optic fibre temperature measurement system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911121214.3A CN110926648A (en) 2019-11-15 2019-11-15 High tension cable middle head optic fibre temperature measurement system

Publications (1)

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CN110926648A true CN110926648A (en) 2020-03-27

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002081998A (en) * 2000-09-05 2002-03-22 Hitachi Cable Ltd Temperature monitor for terminal part of distribution board
CN201378084Y (en) * 2008-12-02 2010-01-06 广州市设计院 Enclosed bus slot joint or plug temperature measuring device
CN203337286U (en) * 2013-06-27 2013-12-11 北京博大华电测控技术有限公司 Optical-fiber on-line temperature measuring system dedicated for electric power contacts
CN104359588A (en) * 2014-11-18 2015-02-18 国家电网公司 Power cable temperature measuring device
CN205229527U (en) * 2015-11-10 2016-05-11 江苏法尔胜光电科技有限公司 Power cable connects composite cable for temperature monitoring and monitoring system thereof
CN208125295U (en) * 2018-03-29 2018-11-20 四川省东宇信息技术有限责任公司 A kind of high-tension cable monitoring system based on optical fiber transmission
CN109904932A (en) * 2019-04-11 2019-06-18 中国铁路设计集团有限公司 A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring method and monitoring device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002081998A (en) * 2000-09-05 2002-03-22 Hitachi Cable Ltd Temperature monitor for terminal part of distribution board
CN201378084Y (en) * 2008-12-02 2010-01-06 广州市设计院 Enclosed bus slot joint or plug temperature measuring device
CN203337286U (en) * 2013-06-27 2013-12-11 北京博大华电测控技术有限公司 Optical-fiber on-line temperature measuring system dedicated for electric power contacts
CN104359588A (en) * 2014-11-18 2015-02-18 国家电网公司 Power cable temperature measuring device
CN205229527U (en) * 2015-11-10 2016-05-11 江苏法尔胜光电科技有限公司 Power cable connects composite cable for temperature monitoring and monitoring system thereof
CN208125295U (en) * 2018-03-29 2018-11-20 四川省东宇信息技术有限责任公司 A kind of high-tension cable monitoring system based on optical fiber transmission
CN109904932A (en) * 2019-04-11 2019-06-18 中国铁路设计集团有限公司 A kind of tractive power supply system 27.5kV high-tension cable on-line condition monitoring method and monitoring device

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Application publication date: 20200327

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