WO2020206978A1 - Online water leak monitoring apparatus for electrical power cables - Google Patents
Online water leak monitoring apparatus for electrical power cables Download PDFInfo
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- 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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- water
- cable
- monitoring device
- optical fiber
- sensing
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000013307 optical fiber Substances 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims abstract description 3
- 238000012806 monitoring device Methods 0.000 claims description 43
- 230000008961 swelling Effects 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 13
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000007779 soft material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
Classifications
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- 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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- General Physics & Mathematics (AREA)
- Insulated Conductors (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
An online water leak monitoring apparatus for electrical power cables. The monitoring apparatus consists of a sensing optical fiber (1) and a water-absorbing and expanding material (2). The inner layer is the sensing optical cable (1) acting as a sensor and also as a transmission line for monitoring signals. The outer layer is the water-absorbing and expanding material (2) that upon water absorption expands and generates a pressing force against the inner layer, such that the inner layer sensing optical fiber (1) deforms and changes the propagation features of the signals inside of the optical fiber (1). The analysis of the signals led out of the sensing optical fiber (1) allows for real-time monitoring of water leaks in electrical cables. The whole monitoring apparatus is of a soft material with good plasticity and is suitable for electrical power cables having relevant requirements. The present invention can be placed in the inner structure of an electrical cable either spirally winding the electrical cable or linearly along the axial direction of the electrical cable. The monitoring apparatus is thus in close contact with the inner layer structure of the electrical cable, thereby ensuring the monitoring sensitivity.
Description
一种电力电缆进水在线监测装置 技术领域 On-line monitoring device for water ingress of power cable Technical field
[0001] 本发明涉及电缆线路在线监测技术领域， 具体涉及一种电力电缆进水在线监测 装置。 [0001] 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.
背景技术 Background technique
[0002] 电力电缆是电力系统中传输和分配电能的重要设备， 其安全运行对于保证供电 可靠性具有重要意义。 随着电缆在城市输配电网络中的广泛应用， 近几年来其 故障数量也呈逐年上升趋势。 厂家产品质量以及现场施工安装人员的工艺是导 致电缆故障的主要原因， 由这两者导致导致的进水问题是影响电缆安全可靠运 行的重要因素。 电缆进水会加快绝缘的热老化， 同时使电缆内部金属屏蔽甚至 导体锈蚀， 大大缩短电缆使用寿命， 引发一系列事故。 目前， 并无专门的监测 装置针对电缆进水进行实时监测， 往往是在电缆线路发生故障后才发现其内部 进水受潮问题严重。 因此， 研发一种电力电缆进水在线监测装置， 对于及时发 现运行电缆绝缘缺陷和故障隐患， 保证电网的安全可靠运行具有重要意义。 发明概述 [0002] 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. With the widespread application of cables in urban transmission and distribution networks, the number of faults has also been increasing year by year in recent years. 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. At present, there is no special monitoring device for real-time monitoring of cable water ingress, and it is often found that the internal water ingress and damp problems are serious after the cable line fails. Therefore, the development of an online monitoring device for power cable water ingress is of great significance for timely detection of operating cable insulation defects and hidden faults, and for ensuring the safe and reliable operation of the power grid. Summary of the invention
技术问题 technical problem
[0003] 目前并无专门的监测装置针对电缆进水进行实时监测， 往往是在电缆线路发生 故障后才发现其内部进水受潮问题严重。 本发明提供一种电力电缆进水在线监 测装置， 该装置能对运行电缆内部进水情况进行实时监测， 适用于各式电力电 缆， 解决了现阶段无法对运行电缆进水进行实时监测的问题， 利用本装置能有 效提高电缆线路的智能化运维水平。 [0003] At present, there is no special monitoring device for real-time monitoring of cable water ingress, and it is often found that the internal water ingress and damp problems are serious after the cable line fails. 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.
问题的解决方案 The solution to the problem
技术解决方案 Technical solutions
[0004] 本发明的目的是为了解决现有技术中的上述缺陷， 提供一种电力电缆进水在线 监测装置。 该装置能对运行电缆内部进水情况进行实时监测， 适用于各式电力 电缆， 解决了现阶段无法对运行电缆进水进行实时监测的问题， 利用本装置能
有效提高电缆线路的智能化运维水平。 [0004] 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.
[0005] 本发明的目的可以通过采取如下技术方案达到： [0005] The purpose of the present invention can be achieved by adopting the following technical solutions:
[0006] 一种电力电缆进水在线监测装置， 该监测装置由传感光纤 1和吸水膨胀材料 2组 成， 其中监测装置内层为传感光纤 1， 作为传感器， 同时作为监测信号传输线路 ; 外层为吸水膨胀材料 2, 吸收水分后对内层传感光纤 1产生膨胀挤压力， 改变 传感光纤 1内信号的传播特征， 通过对引出传感光纤 1的信号进行分析， 即可实 现对电缆进水的实时监控。 [0006] An on-line monitoring device for power cable water ingress, the monitoring device 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.
[0007] 进一步地， 所述的传感光纤 1为具有光纤传感单元的光纤或具有护套的光缆状 结构。 [0007] Further, the sensing optical fiber 1 is an optical fiber with an optical fiber sensing unit or an optical cable-like structure with a sheath.
[0008] 进一步地， 所述的吸水膨胀材料 2为包括亲水橡胶在内的软质吸水膨胀材料。 [0008] Further, the water-absorbing swelling material 2 is a soft water-absorbing swelling material including hydrophilic rubber.
[0009] 进一步地， 所述的吸水膨胀材料 2根据需要可以加工成圆筒状或其他形状， 紧 密包裹内层光纤。 [0009] Further, 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.
[0010] 进一步地， 所述的吸水膨胀材料 2根据需要采用全段或分段方式包裹内层传感 光纤， 分段长度根据需要调整。 [0010] Further, 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.
[0011] 进一步地， 该监测装置整体材质柔软， 可塑性好， 适用于包括海底电缆、 陆地 电缆， 以及单芯、 三芯电缆在内的电力电缆， 且在电缆内部的安装位置不限， 根据实际需要可以安装于电缆填充层、 缆芯导体层等部分， 与电缆构成封闭一 体式结构， 保证监测装置与电缆的紧密接触。 [0011] Further, 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.
[0012] 进一步地， 根据工艺要求， 监测装置在电缆内部可以采用螺旋缠绕放置或沿轴 向直线放置。 [0012] Further, according to the process requirements, the monitoring device can be placed in a spiral wound inside the cable or placed in a straight line along the axis.
发明的有益效果 The beneficial effects of the invention
有益效果 Beneficial effect
[0013] 本发明相对于现有技术具有如下的优点及效果： [0013] Compared with the prior art, the present invention has the following advantages and effects:
[0014] 1）本发明利用吸水膨胀材料的性能特点， 结合传感光纤构成了电力电缆进水在 线监测装置。 吸水膨胀材料吸水后产生膨胀挤压力， 使内层光纤变形， 改变了 光纤内光信号的传播特征， 通过监测引出光纤的光信号即可实现实时监测运行 电缆内部进水的功能， 提升了电缆运维检修的效率。 [0014] 1) 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. By monitoring the optical signal of the extracted 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.
[0015] 2） 本发明公开的电力电缆进水在线监测装置整体材质柔软， 可塑性好， 采用
螺旋放置或沿电缆轴向直线方式安装在电缆内部， 与电缆构成封闭一体式结构 ， 保证监测装置与电缆的紧密接触， 避免了环境因素干扰， 同时有效保护了监 测装置， 提高了监测装置的可靠性。 [0015] 2) 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.
对附图的简要说明 Brief description of the drawings
附图说明 Description of the drawings
[0016] 图 1是本发明实施例中公开的电力电缆进水在线监测装置的三维结构图； [0016] FIG. 1 is a three-dimensional structure diagram of an online monitoring device for water ingress of a power cable disclosed in an embodiment of the present invention;
[0017] 图 2是本发明实施例中公开的电力电缆进水在线监测装置外层吸水膨胀材料采 用分段包裹方式的三维图； [0017] 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;
[0018] 图 3是本发明实施例中公开的电力电缆进水在线监测装置在单芯电缆填充层安 装的截面图； [0018] FIG. 3 is a cross-sectional view of the installation of the power cable water ingress online monitoring device in the single-core cable filling layer disclosed in the embodiment of the present invention;
[0019] 图 4是本发明实施例中公开的电力电缆进水在线监测装置在单芯电缆内螺旋绕 制的三维图； [0019] 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;
[0020] 图 5是本发明实施例中公开的电力电缆进水在线监测装置在单芯电缆内直线放 置的三维图。 [0020] 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.
发明实施例 Invention embodiment
本发明的实施方式 Embodiments of the invention
[0021] 为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发明实施 例中的附图， 对本发明实施例中的技术方案进行清楚、 完整地描述， 显然， 所 描述的实施例是本发明一部分实施例， 而不是全部的实施例。 基于本发明中的 实施例， 本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他 实施例， 都属于本发明保护的范围。 [0021] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the description The embodiments shown are a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
实施例 Example
[0022] 如图 1所示， 本实施例公开了一种电力电缆进水在线监测装置， 该监测装置由 传感光纤 1和吸水膨胀材料 2组成， 其中监测装置内层为传感光纤 1， 作为传感器 ， 同时作为监测信号传输线路； 外层为吸水膨胀材料 2, 两层结构紧密贴合构成 进水监测装置。 电缆内部进水时， 吸水膨胀材料 2吸收水分后对内层传感光纤 1 产生膨胀挤压力， 改变传感光纤 1内信号的传播特征， 通过对引出传感光纤 1的 信号进行分析， 即可实现对电缆进水的实时监控。
[0023] 该传感光纤 1为具有光纤传感单元的光纤或具有护套的光缆状结构， 所述监测 装置外层为包括亲水橡胶在内的软质吸水膨胀材料 2, 外层的吸水膨胀材料 2根 据需要可以加工成圆筒状或其他形状， 紧密包裹内层的传感光纤 1。 [0022] As shown in FIG. 1, 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. As a sensor, it also serves as a monitoring signal transmission line; the outer layer is a water-absorbing swelling material 2, and the two-layer structure closely fits to form a water ingress monitoring device. When water enters the cable, 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. By analyzing the signal from the sensing fiber 1, that is Real-time monitoring of cable water ingress can be realized. [0023] 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.
[0024] 如图 2所示， 该监测装置中外层吸水膨胀材料 2根据需要可以采用全段或分段方 式包裹内层传感光纤 1， 分段长度不限。 [0024] As shown in FIG. 2, 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.
[0025] 该监测装置适用于包括海底电缆、 陆地电缆， 以及单芯、 三芯电缆在内的电力 电缆， 且在电缆内部的安装位置不限， 根据实际需要可以安装于电缆填充层、 缆芯导体等部分。 如图 3所示， 以将本监测电缆进水的监测装置应用于单芯电缆 填充层作为示例， 该监测装置包括传感光纤 1和吸水膨胀材料 2, 电缆由里向外 依次为缆芯导体 3、 绝缘层内屏蔽 4、 绝缘层 5、 绝缘层外屏蔽 6、 填充层 7、 铝护 套层 8与外护套层 9。 [0025] The monitoring device is suitable for power cables including submarine cables, terrestrial cables, and single-core and three-core cables, and the installation position inside the cable is not limited. It can be installed on the cable filling layer and the cable core according to actual needs. Conductor and other parts. As shown in Figure 3, taking the monitoring device for monitoring cable water ingress applied to the filling layer of a single-core cable as an example, the monitoring device includes a sensing optical fiber 1 and a water-absorbing swellable material 2, and the cable is the core conductor from the inside to the outside. 3. Insulating layer inner shielding 4, insulating layer 5, insulating layer outer shielding 6, filling layer 7, aluminum sheath layer 8 and outer sheath layer 9.
[0026] 如图 4和图 5所示， 根据工艺需要， 本实施例公开的电力电缆进水在线监测装置 在电缆内部可以采用螺旋绕制放置或沿电缆轴向直线方式放置。 [0026] As shown in FIG. 4 and FIG. 5, according to process requirements, 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.
[0027] 上述实施例为本发明较佳的实施方式， 但本发明的实施方式并不受上述实施例 的限制， 其他的任何未背离本发明的精神实质与原理下所作的改变、 修饰、 替 代、 组合、 简化， 均应为等效的置换方式， 都包含在本发明的保护范围之内。
[0027] The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, and substitutions made without departing from the spirit and principle of the present invention , Combination, and simplification should all be equivalent replacement methods, and they are all included in the protection scope of the present invention.
Claims
[权利要求 1] 一种电力电缆进水在线监测装置， 其特征在于， 所述的监测装置包括 传感光纤和吸水膨胀材料， 其中， 所述的传感光纤位于监测装置内层 ， 作为传感器， 同时作为监测信号传输线路； 所述的吸水膨胀材料位 于监测装置外层， 紧密包裹内层传感光纤， 吸收水分后对内层的传感 光纤产生膨胀挤压力， 改变传感光纤内信号的传播特征， 通过对引出 传感光纤的信号进行分析， 即可实现对电缆进水的实时监控。 [Claim 1] An on-line monitoring device for water ingress of a power cable, characterized in that the monitoring device comprises a sensing optical fiber and a water-absorbing swelling material, wherein the sensing optical fiber is located in the inner layer of the monitoring device and serves as a sensor, At the same time as a monitoring signal transmission line; the water-absorbing swelling material is located on the outer layer of the monitoring device, and tightly wraps the inner sensing fiber, after absorbing moisture, produces an expansion and squeezing force on the inner sensing fiber to change the signal inside the sensing fiber The propagation characteristics can realize real-time monitoring of water ingress in the cable by analyzing the signal derived from the sensing fiber.
[权利要求 2] 根据权利要求 1所述的一种电力电缆进水在线监测装置， 其特征在于 ， 所述的传感光纤为具有光纤传感单元的光纤或具有护套的光缆状结 构。 [Claim 2] An on-line monitoring device for water ingress of a power cable according to claim 1, wherein the sensing optical fiber is an optical fiber with an optical fiber sensing unit or an optical cable-like structure with a sheath.
[权利要求 3] 根据权利要求 1所述的一种电力电缆进水在线监测装置， 其特征在于 ， 所述的吸水膨胀材料为包括亲水橡胶在内的软质吸水膨胀材料。 [Claim 3] A power cable water ingress online monitoring device according to claim 1, wherein the water-absorbing swelling material is a soft water-absorbing swelling material including hydrophilic rubber.
[权利要求 4] 根据权利要求 1所述的一种电力电缆进水在线监测装置， 其特征在于 ， 所述的吸水膨胀材料为圆筒状。 [Claim 4] The power cable water ingress online monitoring device according to claim 1, wherein the water-absorbing and swelling material is cylindrical.
[权利要求 5] 根据权利要求 1所述的一种电力电缆进水在线监测装置， 其特征在于 ， 所述的吸水膨胀材料采用全段或分段方式包裹内层传感光纤， 其中 ， 分段长度根据需要调整。 [Claim 5] An on-line monitoring device for power cable water ingress according to claim 1, wherein the water-absorbing swellable material is used to wrap the inner sensing optical fiber in a full-length or segmented manner, wherein the segments are Adjust the length as needed.
[权利要求 6] 根据权利要求 1所述的一种电力电缆进水在线监测装置， 其特征在于 ， 所述的传感装置适用于包括海底电缆、 陆地电缆、 以及单芯、 三芯 电缆在内的电力电缆。 [Claim 6] A power cable water ingress online monitoring device according to claim 1, wherein the sensing device is suitable for including submarine cables, land cables, and single-core and three-core cables. Power cable.
[权利要求 7] 根据权利要求 1所述的一种电力电缆进水在线监测装置， 其特征在于 ， 所述的传感装置设置在电缆内部， 并采用螺旋绕制放置或沿电缆轴 向直线方式放置。
[Claim 7] The on-line monitoring device for water ingress of a power cable according to claim 1, wherein the sensing device is arranged inside the cable and is placed in a spiral winding or in a straight line along the axis of the cable. place.
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| CN201910443913.3 | 2019-05-27 | ||
| CN201910443913.3A CN110108308A (en) | 2019-05-27 | 2019-05-27 | A kind of power cable water inlet on-Line Monitor Device |
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| CN110108308A (en) * | 2019-05-27 | 2019-08-09 | 华南理工大学 | A kind of power cable water inlet on-Line Monitor Device |
| CN110132325A (en) * | 2019-05-27 | 2019-08-16 | 华南理工大学 | A kind of power cable water inlet sensing device based on stress enhancing structure |
| CN113310925A (en) * | 2021-05-31 | 2021-08-27 | 中电保力（北京）科技有限公司 | Device for measuring humidity of cable by using optical signal |
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