WO2015161629A1 - Intelligent monitoring system for variation of stress of power transmission line - Google Patents

Intelligent monitoring system for variation of stress of power transmission line Download PDF

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Publication number
WO2015161629A1
WO2015161629A1 PCT/CN2014/088759 CN2014088759W WO2015161629A1 WO 2015161629 A1 WO2015161629 A1 WO 2015161629A1 CN 2014088759 W CN2014088759 W CN 2014088759W WO 2015161629 A1 WO2015161629 A1 WO 2015161629A1
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Prior art keywords
transmission line
monitoring system
grating
intelligent monitoring
stress
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PCT/CN2014/088759
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French (fr)
Chinese (zh)
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韦强启
李现春
姜新斌
王斌
崔向阳
王桂花
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国家电网公司
国网河南省电力公司周口供电公司
河南科信电缆有限公司
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Publication of WO2015161629A1 publication Critical patent/WO2015161629A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables

Definitions

  • the invention relates to the field of power transmission, in particular to a novel intelligent monitoring system for stress variation of transmission lines.
  • the existing opto-electric composite cable has optical fiber communication function and power transmission function, and can realize various control signals, network signals and power transmission, and is suitable for the use of multi-network integration of telecommunication network, wide-area network, internet and power network.
  • the change of the stress of the photoelectric composite cable during operation cannot be monitored, and the entire cable is easily damaged due to excessive stress.
  • the technical problem to be solved by the present invention is to overcome the above-mentioned drawbacks in the prior art and to provide a novel intelligent monitoring system for stress variation of transmission lines.
  • a novel intelligent monitoring system for stress change of transmission lines comprising: a transmission line, the transmission line comprising a plurality of conductive cores, the conductive core is covered with a heat insulation lining, the conductive core and the partition a thermal insulating layer filled with a magnesium oxide insulating filler; and a light unit housed in the magnesium oxide insulating filler; the light unit comprising a plurality of optical fibers, at least one of the The optical fiber is a grating fiber in which a stress grating is written, and a grating stress point is formed at a predetermined distance on the grating fiber.
  • the conductive core is provided with four, the center of the conductive core is a copper conductor, and the outer portion of the copper conductor is coated with an insulating layer and a protective layer.
  • the thermal insulation liner is covered with a metal sheath and a non-metallic sheath disposed from the inside to the outside.
  • the metal sheath is a seamless copper tube.
  • the non-metallic sheath is a plastic protective layer.
  • the light unit further includes a loose tube, a non-metallic reinforcing layer and a sheath disposed in order from the inside to the outside, the loose tube is sleeved outside the optical fiber, and the loose tube and the optical fiber are Filled with a dry water barrier, a plurality of uniformly distributed water blocking yarns are disposed in the non-metallic reinforcing layer, and a tearing cord is embedded between the non-metallic reinforcing layer and the sheath.
  • the predetermined distance is 300-500 meters.
  • the predetermined distance is 400 meters.
  • the other fibers of the optical fiber other than the grating fiber are communication fibers.
  • the grating fiber is made by a fiber-optic writing grating.
  • the beneficial effects of the invention include at least one of the following: the high conductivity copper is used as the conductor, so that the cable of the invention has high conductivity; the non-combustible, high temperature resistant (2800 ° C) magnesium oxide is used as the insulating material, and the insulation and the fireproof are provided.
  • the performance is higher than the ordinary rubber or plastic insulation layer; the outermost non-metallic sheath, that is, the plastic outer sheath, has good anti-corrosion characteristics; the seamless copper tube is used as the metal sheath, which has good flexibility and flexibility.
  • the electric energy can be normally transmitted, the communication can be performed, and the stress measurement can be performed by itself.
  • This saves ADSL, OPGW and other equipment added for power communication, and can also reduce the threat of accidents such as lightning strikes caused by OPGW.
  • it can save the cost of GPS wire stress measurement equipment used in the current work, which saves huge cost.
  • the worker can monitor the line stress change in real time.
  • the invention shows great economic and social benefits for strengthening online monitoring of cables, mastering stress changes, improving power grid operation safety, increasing communication backup, and solving all-round communication schemes, especially in the current state to fully build environmental protection and economy.
  • the main trend of the society is more powerful.
  • FIG. 1 is a schematic structural diagram of a novel intelligent monitoring system for stress variation of a transmission line according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a light unit of a novel transmission line stress change intelligent monitoring system according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a novel intelligent monitoring system for stress variation of a transmission line according to an embodiment of the present invention.
  • a novel transmission line stress change intelligent monitoring system includes four conductive cores, and a thermal insulation liner 8 and a metal are sequentially coated outside the four conductive cores.
  • the conductive core center is a copper conductor 1 at the copper
  • the outer side of the conductor 1 is coated with the insulating layer 2 and the protective layer 3 in sequence; further comprising a light unit 5 housed in the magnesium oxide insulating filler 4.
  • the metal sheath is a seamless copper tube; the non-metallic sheath is a plastic protective layer.
  • FIG. 2 is a schematic structural diagram of a light unit of a novel transmission line stress change intelligent monitoring system according to an embodiment of the present invention.
  • the light unit 5 includes a plurality of optical fibers 51 and a loose sleeve 52 disposed in order from the inside to the outside, a non-metallic reinforcing layer 53 and a sheath 54.
  • the loose sleeve 52 is sleeved outside the optical fiber 51.
  • the loose tube 52 is filled with a dry water blocking material 55, a plurality of uniformly distributed water blocking yarns 56 are disposed in the non-metallic reinforcing layer 53, and a tearing rope 57 is embedded between the non-metallic reinforcing layer 53 and the sheath 54;
  • At least one optical fiber is a grating optical fiber on which a stress grating is written, and a predetermined distance between the grating fibers forms a grating stress point, and the predetermined distance is 300-500 meters.
  • the invention adopts a method for fabricating a recording grating directly on an optical fiber to perform stress conductor manufacturing.
  • the grating fiber recorded by the optical fiber utilizes the photosensitivity of the fiber material, and a special processing method is adopted to form a spatial phase grating in the core, and a narrow-band mirror surface is locally formed to reflect the light of a specific wavelength.
  • the stress of the fiber changes, the periphery of the grating changes with the thermal expansion and contraction of the fiber. This change changes the reflection wavelength.
  • the fiber induced stress at the position where the grating is located can be measured. .
  • the position of the grating can be known. This is the principle of measuring stress using grating fiber.
  • the method of directly engraving the grating does not cause additional loss and does not affect the measurement distance.
  • This method of fabrication is better than the way of welding.
  • the stress measurement method of the grating optical fiber recorded by the optical fiber is a special-purpose and targeted optical fiber, and the reflected signal is strong. Therefore, the transmission power and the receiving sensitivity requirement of the device are lower than the Raman reflection stress measurement mode, and the stability of the device is good.
  • the advantage is that the measurement distance is long, the measurement distance can be more than 100km, and the measurement accuracy is within ⁇ 20°C.
  • At least one of the optical fibers is written with a grating, the grating is written at a set position, and the induced stress of the grating at different positions is measured by the emitted optical signal.
  • This is to achieve the use of grating fiber to measure stress.
  • the invention does not need to measure the continuous stress distribution of the whole line, and can select one measuring point every 300-500 meters, or increase the distribution grating point at the lowest point of the sag, and select the stress measuring mode of the grating fiber to monitor the line stress change, which can be used at any time.
  • the transmission capacity is adjusted by the stress that is mastered.
  • 300 meters, 400 meters, and 500 meters may be selected as the separation distance (i.e., the predetermined distance) of adjacent stress points.
  • the optical unit is internally bored with 24 fibers, and the grating is written on 8 of the 24 fibers. 15 gratings were recorded on each of the 8 fibers, ie a total of 15 stress points per root.
  • 16 of the 24 fibers are used for communication, and 8 of the 24 fibers are used to measure the stress.
  • Actual production such as using the transmission line stress change intelligent monitoring system of the present invention, can not only normally transmit electrical energy, but also communicate, and can also perform stress measurement by itself. This saves ADSL and other equipment added for power communication, and can also reduce the threat of accidents such as lightning strikes caused by OPGW. In addition, it can save the use of GPS wire stress measuring equipment that is used at the current cost. Save huge costs.
  • the worker can directly determine the actual load condition of the line based on the measured line stress.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Communication Cables (AREA)

Abstract

An intelligent monitoring system for variation of stress of a power transmission line. The intelligent monitoring system comprises a power transmission line. The power transmission line comprises: a plurality of conducting wire cores, the conducting wire cores being cladded in heat insulation linings, and magnesia insulation fillers being packed between the conducting wire cores and the heat insulation linings; and optical units, the optical units being accommodated in the magnesia insulation fillers. Each of the optical units comprises a plurality of optical fibres, wherein at least one of the optical fibres is a grating optical fibre on which a stress monitoring grating is inscribed; and grating stress monitoring points are formed on the grating optical fibre at intervals of a predetermined distance. A conductor made of pure copper with high electric conductivity has high electric conductivity; magnesia mineral is used as an insulation material, so that the insulating and fireproof properties thereof are good; and the variation in stress of a line can be monitored in real time.

Description

[根据细则37.2由ISA制定的发明名称]　一种输电线路应力变化智能监测系统[Name of invention established by ISA according to Rule 37.2] An intelligent monitoring system for stress changes in transmission lines 技术领域Technical field
本发明涉及电力输送领域，尤其涉及一种新型输电线路应力变化智能监测系统。The invention relates to the field of power transmission, in particular to a novel intelligent monitoring system for stress variation of transmission lines.
背景技术Background technique
随着我国经济建设的不断发展，电力需求的不断增长，电缆作为电能传输的载体的需求量也越来越大。但是现有的电缆，比如常用的有机电缆(塑料电缆)，其绝缘性能存在缺陷，比如塑料绝缘层容易老化、不耐高温、容易变硬等缺陷；常用的钢芯铝绞线，其电气性能、导电性能不好。With the continuous development of China's economic construction and the continuous growth of power demand, the demand for cables as carriers for power transmission is also increasing. However, existing cables, such as commonly used organic cables (plastic cables), have defects in insulation properties, such as defects in plastic insulation that are prone to aging, high temperature resistance, and easy to harden. Commonly used steel-cored aluminum stranded wires have electrical properties. The conductivity is not good.
此外，现有光电复合缆，具有光纤通信功能和电力传输功能，可以实现各种控制信号、网络信号以及电力的传输，适应电信网、广电网、互联网、电力网多网融合的使用需要。但是，这种光电复合缆在运行中应力变化情况无法监测，容易发生因应力过大导致整个电缆损坏的现象。In addition, the existing opto-electric composite cable has optical fiber communication function and power transmission function, and can realize various control signals, network signals and power transmission, and is suitable for the use of multi-network integration of telecommunication network, wide-area network, internet and power network. However, the change of the stress of the photoelectric composite cable during operation cannot be monitored, and the entire cable is easily damaged due to excessive stress.
发明内容Summary of the invention
本发明所要解决的技术问题是克服现有技术中的上述缺陷，提供一种新型输电线路应力变化智能监测系统。The technical problem to be solved by the present invention is to overcome the above-mentioned drawbacks in the prior art and to provide a novel intelligent monitoring system for stress variation of transmission lines.
本发明解决其技术问题所采用的技术方案是:The technical solution adopted by the present invention to solve the technical problem thereof is:
一种新型输电线路应力变化智能监测系统，包括：输电线路，所述输电线路包括多根导电线芯，所述导电线芯外包覆有隔热衬层，所述导电线芯和所述隔热衬层之间填充有氧化镁绝缘填充物；以及光单元，所述光单元容纳在所述氧化镁绝缘填充物中；所述光单元包括多根光纤，至少一根所述 光纤为刻写有测应力光栅的光栅光纤，所述光栅光纤上每间隔预定的距离形成一个光栅测应力点。A novel intelligent monitoring system for stress change of transmission lines, comprising: a transmission line, the transmission line comprising a plurality of conductive cores, the conductive core is covered with a heat insulation lining, the conductive core and the partition a thermal insulating layer filled with a magnesium oxide insulating filler; and a light unit housed in the magnesium oxide insulating filler; the light unit comprising a plurality of optical fibers, at least one of the The optical fiber is a grating fiber in which a stress grating is written, and a grating stress point is formed at a predetermined distance on the grating fiber.
优选的，所述导电线芯设置有四根，所述导电线芯中心为铜导体，所述铜导体外依次包覆有绝缘层和保护层。Preferably, the conductive core is provided with four, the center of the conductive core is a copper conductor, and the outer portion of the copper conductor is coated with an insulating layer and a protective layer.
优选的，所述隔热衬层外包覆有由内向外设置的金属护套和非金属护套。Preferably, the thermal insulation liner is covered with a metal sheath and a non-metallic sheath disposed from the inside to the outside.
优选的，所述金属护套是无缝铜管。Preferably, the metal sheath is a seamless copper tube.
优选的，所述非金属护套是塑料保护层。Preferably, the non-metallic sheath is a plastic protective layer.
优选的，所述光单元还包括从内到外依次设置的松套管、非金属加强层和护套，所述松套管套在所述光纤外，所述松套管与所述光纤之间填充满干式阻水物，所述非金属加强层内设置有多根均匀分布的阻水纱，所述非金属加强层与所述护套之间嵌有撕裂绳。Preferably, the light unit further includes a loose tube, a non-metallic reinforcing layer and a sheath disposed in order from the inside to the outside, the loose tube is sleeved outside the optical fiber, and the loose tube and the optical fiber are Filled with a dry water barrier, a plurality of uniformly distributed water blocking yarns are disposed in the non-metallic reinforcing layer, and a tearing cord is embedded between the non-metallic reinforcing layer and the sheath.
优选的，所述预定的距离为300-500米。Preferably, the predetermined distance is 300-500 meters.
优选的，所述预定的距离为400米。Preferably, the predetermined distance is 400 meters.
优选的，所述光纤中除所述光栅光纤外的其他光纤为通讯光纤。Preferably, the other fibers of the optical fiber other than the grating fiber are communication fibers.
优选的，所述光栅光纤通过光纤刻录光栅制得。Preferably, the grating fiber is made by a fiber-optic writing grating.
本发明的有益效果包括下述至少一个:由高导电率的铜作导体，使得本发明的电缆导电率高；采用不燃烧、耐高温(2800℃)的氧化镁作绝缘材质，其绝缘、防火性能要高于普通的橡胶或塑料绝缘层；在最外边的非金属护套，即塑料外护层，有良好的防腐特性；采用无缝铜管作金属护套，有良好的弯曲性和柔性。 The beneficial effects of the invention include at least one of the following: the high conductivity copper is used as the conductor, so that the cable of the invention has high conductivity; the non-combustible, high temperature resistant (2800 ° C) magnesium oxide is used as the insulating material, and the insulation and the fireproof are provided. The performance is higher than the ordinary rubber or plastic insulation layer; the outermost non-metallic sheath, that is, the plastic outer sheath, has good anti-corrosion characteristics; the seamless copper tube is used as the metal sheath, which has good flexibility and flexibility. .
实际生产中如使用本发明的电缆，既可以正常输送电能，又能进行通讯，还能自身进行应力测量。这样就节省了为了电力通讯而增加的ADSL,OPGW等设备，也能减少因为OPGW引起的雷击等事故威胁。另外还能节省目前工作中采取的使用很高成本的GPS导线测应力设备，节省巨大的成本。在将本发明的电缆作为传输电力的线路时，工作人员可以实时监测线路应力变化。In the actual production, if the cable of the invention is used, the electric energy can be normally transmitted, the communication can be performed, and the stress measurement can be performed by itself. This saves ADSL, OPGW and other equipment added for power communication, and can also reduce the threat of accidents such as lightning strikes caused by OPGW. In addition, it can save the cost of GPS wire stress measurement equipment used in the current work, which saves huge cost. When the cable of the present invention is used as a line for transmitting power, the worker can monitor the line stress change in real time.
本发明对加强电缆在线监测、掌握应力变化、提高电网运行安全、增加通信备份、解决全方位通信方案等等方面都显示出具大的经济效益和社会效益，尤其在当下国家全力建设环保型、经济型社会的主潮流中更加显示出强大的现实意义。The invention shows great economic and social benefits for strengthening online monitoring of cables, mastering stress changes, improving power grid operation safety, increasing communication backup, and solving all-round communication schemes, especially in the current state to fully build environmental protection and economy. The main trend of the society is more powerful.
附图说明DRAWINGS
图1为本发明的实施例提供的新型输电线路应力变化智能监测系统的结构示意图；1 is a schematic structural diagram of a novel intelligent monitoring system for stress variation of a transmission line according to an embodiment of the present invention;
图2为本发明的实施例提供的新型输电线路应力变化智能监测系统的光单元的结构示意图。FIG. 2 is a schematic structural diagram of a light unit of a novel transmission line stress change intelligent monitoring system according to an embodiment of the present invention.
具体实施方式detailed description
下面结合附图和实施例对本申请作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释本申请，而非对本申请的限定。The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.
图1为本发明的实施例提供的新型输电线路应力变化智能监测系统的结构示意图。FIG. 1 is a schematic structural diagram of a novel intelligent monitoring system for stress variation of a transmission line according to an embodiment of the present invention.
如图1所示，一种新型输电线路应力变化智能监测系统，所述输电线路包括四根导电线芯，在所述四根导电线芯外依次包覆有隔热衬层8、金属 护套6和非金属护套7，在所述四根导电线芯和隔热衬层8之间填充有氧化镁绝缘填充物4；所述导电线芯中心为铜导体1，在所述铜导体1外依次包覆有绝缘层2和保护层3；还包括有光单元5，所述光单元5容纳在所述氧化镁绝缘填充物4中。As shown in FIG. 1 , a novel transmission line stress change intelligent monitoring system includes four conductive cores, and a thermal insulation liner 8 and a metal are sequentially coated outside the four conductive cores. a sheath 6 and a non-metallic sheath 7 filled with a magnesium oxide insulating filler 4 between the four conductive cores and the thermal insulation liner 8; the conductive core center is a copper conductor 1 at the copper The outer side of the conductor 1 is coated with the insulating layer 2 and the protective layer 3 in sequence; further comprising a light unit 5 housed in the magnesium oxide insulating filler 4.
在一个优选的实施例中，金属护套是无缝铜管；非金属护套是塑料保护层。In a preferred embodiment, the metal sheath is a seamless copper tube; the non-metallic sheath is a plastic protective layer.
图2为本发明的实施例提供的新型输电线路应力变化智能监测系统的光单元的结构示意图。FIG. 2 is a schematic structural diagram of a light unit of a novel transmission line stress change intelligent monitoring system according to an embodiment of the present invention.
如图2所示，所述的光单元5包括多根光纤51和从内到外依次设置的松套管52,非金属加强层53和护套54，松套管52套在光纤51外，松套管52内填充满干式阻水物55,非金属加强层53内设置有多根均匀分布的阻水纱56，非金属加强层53与护套54之间嵌有撕裂绳57；至少一根光纤为刻写有测应力光栅的光栅光纤，光栅光纤上每间隔预定的距离形成一个光栅测应力点，预定的距离为300-500米。As shown in FIG. 2, the light unit 5 includes a plurality of optical fibers 51 and a loose sleeve 52 disposed in order from the inside to the outside, a non-metallic reinforcing layer 53 and a sheath 54. The loose sleeve 52 is sleeved outside the optical fiber 51. The loose tube 52 is filled with a dry water blocking material 55, a plurality of uniformly distributed water blocking yarns 56 are disposed in the non-metallic reinforcing layer 53, and a tearing rope 57 is embedded between the non-metallic reinforcing layer 53 and the sheath 54; At least one optical fiber is a grating optical fiber on which a stress grating is written, and a predetermined distance between the grating fibers forms a grating stress point, and the predetermined distance is 300-500 meters.
本发明采用直接在光纤上制作刻录光栅的方法进行测应力导体制造。用光纤刻录成的光栅光纤是利用光纤材料的光敏性，通过特殊的加工方式，使纤芯内形成空间相位光栅，局部形成一个窄带的反射镜面，对特定波长的光形成反射。当光纤的应力发生变化时，光栅的周围会随着光纤的热胀冷缩发生变化，该变化会改变反射波长，通过测量反射光的波长变化，便可测量出光栅所处位置的光纤感应应力。同样，通过测量反射光的延迟，可得知光栅的位置。这就是利用光栅光纤测应力的原理。 The invention adopts a method for fabricating a recording grating directly on an optical fiber to perform stress conductor manufacturing. The grating fiber recorded by the optical fiber utilizes the photosensitivity of the fiber material, and a special processing method is adopted to form a spatial phase grating in the core, and a narrow-band mirror surface is locally formed to reflect the light of a specific wavelength. When the stress of the fiber changes, the periphery of the grating changes with the thermal expansion and contraction of the fiber. This change changes the reflection wavelength. By measuring the wavelength change of the reflected light, the fiber induced stress at the position where the grating is located can be measured. . Also, by measuring the retardation of the reflected light, the position of the grating can be known. This is the principle of measuring stress using grating fiber.
直接刻光栅的方式不产生附加损耗，不会影响测量距离，这种制作方式要好于熔接的制作方式。通过光纤刻录成的光栅光纤测应力方式由于是特制有针对性的光纤，反射信号强，因此对设备的发射功率和接收灵敏度要求都低于拉曼反射测应力方式，且设备的稳定性好。同时带来的好处是测量距离远，测量距离可以在100km以上，测量精度在±20℃以内。The method of directly engraving the grating does not cause additional loss and does not affect the measurement distance. This method of fabrication is better than the way of welding. The stress measurement method of the grating optical fiber recorded by the optical fiber is a special-purpose and targeted optical fiber, and the reflected signal is strong. Therefore, the transmission power and the receiving sensitivity requirement of the device are lower than the Raman reflection stress measurement mode, and the stability of the device is good. At the same time, the advantage is that the measurement distance is long, the measurement distance can be more than 100km, and the measurement accuracy is within ±20°C.
这些光纤中的至少一根光纤上进行刻写光栅，在设定的位置进行刻写光栅，通过发射光信号测量不同位置光栅的感应应力。这就是实现了利用光栅光纤测应力。本发明不需要测量整条线路的连续应力分布，可以选用每300—500米一个测量点，或在弧垂最低点加大分布光栅点，选用光栅光纤的测应力方式监控线路应力变化，可随时通过掌握的应力调整输传容量。优选地实施例中，可选择300米、400米、500米作为相邻测应力点的间隔距离(即所述预定的距离)。At least one of the optical fibers is written with a grating, the grating is written at a set position, and the induced stress of the grating at different positions is measured by the emitted optical signal. This is to achieve the use of grating fiber to measure stress. The invention does not need to measure the continuous stress distribution of the whole line, and can select one measuring point every 300-500 meters, or increase the distribution grating point at the lowest point of the sag, and select the stress measuring mode of the grating fiber to monitor the line stress change, which can be used at any time. The transmission capacity is adjusted by the stress that is mastered. In a preferred embodiment, 300 meters, 400 meters, and 500 meters may be selected as the separation distance (i.e., the predetermined distance) of adjacent stress points.
根据本发明的一个具体实施例，光单元内部穿有24根光纤，在这24根光纤中的8根光纤上进行刻写光栅。在这8根光纤中的每根上都刻录15个光栅，即每根上共15个测应力点。在该实施例中，使用24根光纤中的16根光纤进行通讯，利用24根光纤中的8根刻录有光栅的光纤进行测应力。实践证明，该方法能够达到较好的效果。According to a specific embodiment of the invention, the optical unit is internally bored with 24 fibers, and the grating is written on 8 of the 24 fibers. 15 gratings were recorded on each of the 8 fibers, ie a total of 15 stress points per root. In this embodiment, 16 of the 24 fibers are used for communication, and 8 of the 24 fibers are used to measure the stress. Practice has proved that this method can achieve better results.
实际生产如使用本发明的输电线路应力变化智能监测系统，既可以正常输送电能，又能进行通讯，还能自身进行应力测量。这样就节省了为了电力通讯而增加的ADSL等设备，也能减少因为OPGW引起的雷击等事故威胁。另外还能节省目前工作中采取的使用很高成本的GPS导线测应力设备， 节省巨大的成本。在将本发明的电缆作为传输电力的线路时，工作人员可以根据测量到的线路应力来直接确定线路的实际承载状况。Actual production, such as using the transmission line stress change intelligent monitoring system of the present invention, can not only normally transmit electrical energy, but also communicate, and can also perform stress measurement by itself. This saves ADSL and other equipment added for power communication, and can also reduce the threat of accidents such as lightning strikes caused by OPGW. In addition, it can save the use of GPS wire stress measuring equipment that is used at the current cost. Save huge costs. When the cable of the present invention is used as a line for transmitting power, the worker can directly determine the actual load condition of the line based on the measured line stress.
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。 The above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and various changes and modifications may be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Claims (10)

  1. 一种新型输电线路应力变化智能监测系统，包括：A novel intelligent monitoring system for stress changes of transmission lines, including:
    输电线路，所述输电线路包括多根导电线芯，所述导电线芯外包覆有隔热衬层，所述导电线芯和所述隔热衬层之间填充有氧化镁绝缘填充物；以及a power transmission line, the power transmission line includes a plurality of conductive wire cores, the conductive wire core is covered with a heat insulation lining layer, and the conductive wire core and the heat insulation lining layer are filled with a magnesium oxide insulating filler; as well as
    光单元，所述光单元容纳在所述氧化镁绝缘填充物中；所述光单元包括多根光纤，至少一根所述光纤为刻写有测应力光栅的光栅光纤，所述光栅光纤上每间隔预定的距离形成一个光栅测应力点。a light unit, the light unit being housed in the magnesium oxide insulating filler; the light unit comprising a plurality of optical fibers, at least one of the optical fibers being a grating optical fiber engraved with a stress-measuring grating, each interval on the grating optical fiber The predetermined distance forms a grating stress point.
  2. 根据权利要求1所述的新型输电线路应力变化智能监测系统，其中，所述导电线芯设置有四根，所述导电线芯中心为铜导体，所述铜导体外依次包覆有绝缘层和保护层。The novel transmission line stress variation intelligent monitoring system according to claim 1, wherein the conductive core is provided with four, the conductive core center is a copper conductor, and the copper conductor is sequentially covered with an insulating layer and The protective layer.
  3. 根据权利要求2所述的新型输电线路应力变化智能监测系统，其中，所述隔热衬层外包覆有由内向外设置的金属护套和非金属护套。The novel transmission line stress variation intelligent monitoring system according to claim 2, wherein the thermal insulation lining is covered with a metal sheath and a non-metallic sheath disposed from the inside to the outside.
  4. 根据权利要求3所述的新型输电线路应力变化智能监测系统，其中，所述金属护套是无缝铜管。The novel transmission line stress variation intelligent monitoring system according to claim 3, wherein the metal sheath is a seamless copper tube.
  5. 根据权利要求4所述的新型输电线路应力变化智能监测系统，其中，所述非金属护套是塑料保护层。The novel transmission line stress change intelligent monitoring system according to claim 4, wherein the non-metallic sheath is a plastic protective layer.
  6. 根据权利要求1所述的新型输电线路应力变化智能监测系统，其中，所述光单元还包括从内到外依次设置的松套管、非金属加强层和护套，所述松套管套在所述光纤外，所述松套管与所述光纤之间填充满干式阻水物，所述非金属加强层内设置有多根均匀分布的阻水纱，所述非金属加强层与所述护套之间嵌有撕裂绳。 The novel transmission line stress change intelligent monitoring system according to claim 1, wherein the light unit further comprises a loose tube, a non-metallic reinforcing layer and a sheath which are arranged in order from the inside to the outside, and the loose sleeve is sleeved In addition to the optical fiber, the loose tube and the optical fiber are filled with a dry water-blocking material, and the non-metal reinforcing layer is provided with a plurality of uniformly distributed water blocking yarns, and the non-metallic reinforcing layer and the A tear cord is embedded between the sheaths.
  7. 根据权利要求6所述的新型输电线路应力变化智能监测系统，其中，所述预定的距离为300-500米。The novel transmission line stress variation intelligent monitoring system according to claim 6, wherein said predetermined distance is 300-500 meters.
  8. 根据权利要求7所述的新型输电线路应力变化智能监测系统，其中，所述预定的距离为400米。The novel transmission line stress variation intelligent monitoring system according to claim 7, wherein said predetermined distance is 400 meters.
  9. 根据权利要求8所述的新型输电线路应力变化智能监测系统，其中，所述光纤中除所述光栅光纤外的其他光纤为通讯光纤。The novel transmission line stress variation intelligent monitoring system according to claim 8, wherein the other optical fibers other than the grating optical fibers are communication optical fibers.
  10. 根据权利要求1-9任一项所述的新型输电线路应力变化智能监测系统，其中，所述光栅光纤通过光纤刻录光栅制得。 The novel transmission line stress change intelligent monitoring system according to any one of claims 1-9, wherein the grating fiber is produced by a fiber-optic recording grating.
PCT/CN2014/088759 2014-04-24 2014-10-16 Intelligent monitoring system for variation of stress of power transmission line WO2015161629A1 (en)

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CN103928170A (en) * 2014-04-24 2014-07-16 河南科信电缆有限公司 Intelligent stress variation monitoring system of novel electric transmission line

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CN201788759U (en) * 2010-09-14 2011-04-06 上海电缆研究所 Intelligent type overhead transmission conductor and monitoring system thereof
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