WO2020206978A1 - Appareil de surveillance de fuite d'eau en ligne pour câbles d'alimentation électrique - Google Patents

Appareil de surveillance de fuite d'eau en ligne pour câbles d'alimentation électrique Download PDF

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Publication number
WO2020206978A1
WO2020206978A1 PCT/CN2019/112883 CN2019112883W WO2020206978A1 WO 2020206978 A1 WO2020206978 A1 WO 2020206978A1 CN 2019112883 W CN2019112883 W CN 2019112883W WO 2020206978 A1 WO2020206978 A1 WO 2020206978A1
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WO
WIPO (PCT)
Prior art keywords
water
cable
monitoring device
optical fiber
sensing
Prior art date
Application number
PCT/CN2019/112883
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English (en)
Chinese (zh)
Inventor
刘刚
许志锋
Original Assignee
华南理工大学
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Filing date
Publication date
Application filed by 华南理工大学 filed Critical 华南理工大学
Publication of WO2020206978A1 publication Critical patent/WO2020206978A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use

Definitions

  • the present invention relates to the technical field of online monitoring of cable lines, in particular to an online monitoring device for power cable water ingress.
  • a power cable is an important device for transmitting and distributing electric energy in a power system, and its safe operation is of great significance for ensuring the reliability of power supply.
  • the quality of the manufacturer's products and the craftsmanship of the on-site construction and installation personnel are the main causes of cable failure.
  • the water ingress caused by these two factors is an important factor affecting the safe and reliable operation of the cable. Water in the cable will accelerate the thermal aging of the insulation, and at the same time make the metal shield and even the conductor rust inside the cable, greatly shorten the service life of the cable and cause a series of accidents.
  • the present invention provides an online monitoring device for water ingress of a power cable, which can perform real-time monitoring of the water ingress inside the operating cable, is suitable for various power cables, and solves the problem that the water ingress of the operating cable cannot be monitored in real time at this stage. Using this device can effectively improve the intelligent operation and maintenance level of cable lines.
  • the purpose of the present invention is to solve the above-mentioned shortcomings in the prior art by providing an online monitoring device for water ingress of a power cable.
  • the device can perform real-time monitoring of the water ingress inside the running cable and is suitable for all types of power cables. It solves the problem of the inability to monitor the water ingress of the running cable in real time at this stage. Effectively improve the level of intelligent operation and maintenance of cable lines.
  • An on-line monitoring device for power cable water ingress is composed of a sensing fiber 1 and a water-absorbing swelling material 2, wherein the inner layer of the monitoring device is a sensing fiber 1, as a sensor and as a monitoring signal transmission line; The layer is a water-absorbing swelling material 2. After absorbing moisture, an expansion and squeezing force is generated on the inner sensing fiber 1 to change the signal propagation characteristics in the sensing fiber 1. By analyzing the signal derived from the sensing fiber 1, it can be achieved Real-time monitoring of cable water ingress.
  • the sensing optical fiber 1 is an optical fiber with an optical fiber sensing unit or an optical cable-like structure with a sheath.
  • the water-absorbing swelling material 2 is a soft water-absorbing swelling material including hydrophilic rubber.
  • the water-absorbing swellable material 2 can be processed into a cylindrical shape or other shapes as required to tightly wrap the inner optical fiber.
  • the water-absorbing swellable material 2 is used to wrap the inner sensing optical fiber in a full-length or segmented manner as required, and the segment length is adjusted as required.
  • the monitoring device has a soft overall material and good plasticity, and is suitable for power cables including submarine cables, land cables, and single-core and three-core cables, and the installation position inside the cable is not limited, according to actual conditions. It needs to be installed in the cable filling layer, cable core conductor layer and other parts, forming a closed integrated structure with the cable to ensure close contact between the monitoring device and the cable.
  • the monitoring device can be placed in a spiral wound inside the cable or placed in a straight line along the axis.
  • the present invention utilizes the performance characteristics of the water-absorbing swellable material, combined with the sensing optical fiber to form an online monitoring device for power cable water ingress.
  • the water-absorbing swelling material produces expansion and squeezing force after absorbing water, deforms the inner optical fiber, and changes the propagation characteristics of the optical signal in the optical fiber.
  • the function of real-time monitoring of water inflow inside the running cable can be realized, and the cable The efficiency of operation and maintenance.
  • the power cable water ingress on-line monitoring device disclosed by the present invention has a soft overall material and good plasticity. Spiral or linearly installed inside the cable along the cable axis, it forms a closed integrated structure with the cable to ensure close contact between the monitoring device and the cable, avoiding environmental interference, effectively protecting the monitoring device, and improving the reliability of the monitoring device Sex.
  • FIG. 2 is a three-dimensional view of the water-absorbing swelling material of the outer layer of the power cable water ingress online monitoring device disclosed in the embodiment of the present invention adopts a segmented wrapping method
  • FIG. 4 is a three-dimensional diagram of the power cable water ingress online monitoring device disclosed in the embodiment of the present invention being spirally wound in a single-core cable;
  • FIG. 5 is a three-dimensional view of the on-line monitoring device for power cable water ingress disclosed in an embodiment of the present invention placed in a straight line in a single-core cable.
  • this embodiment discloses an on-line monitoring device for water ingress of a power cable.
  • the monitoring device is composed of a sensing optical fiber 1 and a water-absorbing swelling material 2.
  • the inner layer of the monitoring device is a sensing optical fiber 1.
  • the outer layer is a water-absorbing swelling material 2, and the two-layer structure closely fits to form a water ingress monitoring device.
  • the water-absorbing swelling material 2 absorbs the moisture and generates an expansion and squeezing force on the inner sensing fiber 1 to change the signal propagation characteristics in the sensing fiber 1.
  • the sensing optical fiber 1 is an optical fiber with an optical fiber sensing unit or an optical cable-like structure with a sheath, and the outer layer of the monitoring device is a soft water-absorbing swellable material 2 including hydrophilic rubber, and the outer layer of water absorbs
  • the expansion material 2 can be processed into a cylindrical shape or other shapes as required to tightly wrap the sensing fiber 1 in the inner layer.
  • the outer layer of water-absorbing swellable material 2 in the monitoring device can be used to wrap the inner layer of sensing optical fiber 1 in a full section or section according to requirements, and the section length is not limited.
  • the power cable water ingress online monitoring device disclosed in this embodiment can be placed in a spiral winding or a straight line along the cable axis.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Insulated Conductors (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention concerne un appareil de surveillance de fuite d'eau en ligne pour des câbles d'alimentation électrique. L'appareil de surveillance est constitué d'une fibre optique de détection (1) et d'un matériau d'absorption et d'expansion d'eau (2). La couche interne est le câble optique de détection (1) servant de capteur et également de ligne de transmission pour surveiller des signaux. La couche externe est le matériau d'absorption d'eau et d'expansion (2) qui, lors de l'absorption d'eau, se dilate et génère une force de pression contre la couche interne, de telle sorte que la fibre optique de détection de couche interne (1) se déforme et modifie les caractéristiques de propagation des signaux à l'intérieur de la fibre optique (1). L'analyse des signaux émis hors de la fibre optique de détection (1) permet une surveillance en temps réel des fuites d'eau dans les câbles électriques. L'appareil de surveillance entier est constitué d'un matériau souple ayant une bonne plasticité et est approprié pour des câbles d'alimentation électrique ayant des exigences pertinentes. La présente invention peut être placée dans la structure interne d'un câble électrique soit en enroulant en spirale le câble électrique ou linéairement le long de la direction axiale du câble électrique. L'appareil de surveillance est ainsi en contact étroit avec la structure de couche interne du câble électrique, assurant ainsi la sensibilité de la surveillance.
PCT/CN2019/112883 2019-05-27 2019-10-23 Appareil de surveillance de fuite d'eau en ligne pour câbles d'alimentation électrique WO2020206978A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910443913.3A CN110108308A (zh) 2019-05-27 2019-05-27 一种电力电缆进水在线监测装置
CN201910443913.3 2019-05-27

Publications (1)

Publication Number Publication Date
WO2020206978A1 true WO2020206978A1 (fr) 2020-10-15

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Application Number Title Priority Date Filing Date
PCT/CN2019/112883 WO2020206978A1 (fr) 2019-05-27 2019-10-23 Appareil de surveillance de fuite d'eau en ligne pour câbles d'alimentation électrique

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CN (1) CN110108308A (fr)
WO (1) WO2020206978A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110132325A (zh) * 2019-05-27 2019-08-16 华南理工大学 一种基于应力增强结构的电力电缆进水传感装置
CN110108308A (zh) * 2019-05-27 2019-08-09 华南理工大学 一种电力电缆进水在线监测装置
CN113310925A (zh) * 2021-05-31 2021-08-27 中电保力（北京）科技有限公司 一种利用光信号测量电缆湿度的装置

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JPS6122226A (ja) * 1984-07-10 1986-01-30 Sumitomo Electric Ind Ltd 浸水検知型ケ−ブル
JPS62262804A (ja) * 1986-05-09 1987-11-14 Fujikura Ltd 光フアイバ浸水検知センサ
US4812014A (en) * 1986-05-09 1989-03-14 Fujikura Ltd. Water penetration-detecting apparatus and optical fiber cable using same
CN2420642Y (zh) * 2000-03-14 2001-02-21 张向军 自释放式光纤浸水传感器
CN203941103U (zh) * 2014-06-24 2014-11-12 山东大学 一种基于分布反馈光纤激光器的微水检测系统
CN105259626A (zh) * 2015-11-05 2016-01-20 南京华信藤仓光通信有限公司 一种具有渗水监控功能的应力光缆
CN110108308A (zh) * 2019-05-27 2019-08-09 华南理工大学 一种电力电缆进水在线监测装置

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JPH05322690A (ja) * 1992-02-21 1993-12-07 Sumitomo Electric Ind Ltd 漏液検知用光ファイバ
JP2003241040A (ja) * 2002-02-19 2003-08-27 Yazaki Corp 浸水断線センサコード、およびそれを内蔵するケーブル
CN105022131B (zh) * 2015-08-05 2019-02-01 苏州大学 一种用于长距离隧道/管道渗漏监测的传感光缆
CN105450294A (zh) * 2015-12-11 2016-03-30 国家电网公司 一种光缆接头盒积水监测装置及积水监测方法
CN209945373U (zh) * 2019-05-27 2020-01-14 华南理工大学 一种电力电缆进水在线监测装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122226A (ja) * 1984-07-10 1986-01-30 Sumitomo Electric Ind Ltd 浸水検知型ケ−ブル
JPS62262804A (ja) * 1986-05-09 1987-11-14 Fujikura Ltd 光フアイバ浸水検知センサ
US4812014A (en) * 1986-05-09 1989-03-14 Fujikura Ltd. Water penetration-detecting apparatus and optical fiber cable using same
CN2420642Y (zh) * 2000-03-14 2001-02-21 张向军 自释放式光纤浸水传感器
CN203941103U (zh) * 2014-06-24 2014-11-12 山东大学 一种基于分布反馈光纤激光器的微水检测系统
CN105259626A (zh) * 2015-11-05 2016-01-20 南京华信藤仓光通信有限公司 一种具有渗水监控功能的应力光缆
CN110108308A (zh) * 2019-05-27 2019-08-09 华南理工大学 一种电力电缆进水在线监测装置

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