CN104977097A - Method for measuring temperature of high-voltage/extra-high-voltage cable connector by using fiber - Google Patents
Method for measuring temperature of high-voltage/extra-high-voltage cable connector by using fiber Download PDFInfo
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- CN104977097A CN104977097A CN201410127589.1A CN201410127589A CN104977097A CN 104977097 A CN104977097 A CN 104977097A CN 201410127589 A CN201410127589 A CN 201410127589A CN 104977097 A CN104977097 A CN 104977097A
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Abstract
Provided is a method for measuring the temperature of a high-voltage/extra-high-voltage cable connector by using a fiber. The method is characterized by comprising an external temperature-measuring fiber 1, an internal temperature-measuring fiber 5, a temperature-measuring probe fixing clamp 9, and a temperature demodulator 13. The external temperature-measuring fiber 1 comprises a ST fiber connector 2, an external fiber 3, and an external fiber connector 4 which are successively connected. The internal temperature-measuring fiber 5 comprises an adapter embedded member 6, an internal fiber 7, and a temperature-measuring probe 8 which are successively connected. The temperature-measuring probe fixing clamp 9 fixes the temperature-measuring probe 8 to an end cap embedded member 11 by means of a screw 10. The internal temperature-measuring fiber 5 is connected with the external fiber connector 4 via the adapter embedded member 6. The external temperature-measuring fiber 1 is connected with the fiber interface 14 of the temperature demodulator 13 through the ST fiber connector 2. The method online monitors the operating temperature of a cable connector in real time.
Description
Technical field
Content of the present invention relates to the real time on-line monitoring of high pressure, extra-high-tension cable joint working temperature, is specifically related to the fusion method of a kind of optical fiber and insulating material and a kind of method of optical fiber measurement temperature of cable junction.
Background technology
In electrical power trans mission/distribution system, high voltage electric transmission cable is widely used.This kind of cable distribution electric substation institute in and on transmission line of electricity, by the impact of processing technology, construction quality, operating condition and running environment, cable and cable and junction malfunction rate high.And the normal operation of the normal work of feeder cable whether direct relation transmission and distribution networks.Due to electric line cable splice numerous and dispersion, not easily manual patrol, therefore, the working temperature of on-line monitoring high voltage electric transmission cable and joint thereof, can Timeliness coverage cable superheating phenomenon, avoid the power grid accident because high voltage electric transmission cable fault causes, tool is of great significance.Fibre-optic transmission system (FOTS) dielectric strength is high, anti-electromagnetic interference capability is strong, corrosion-resistant, volume is little and structure is simple, be particularly suitable for high-voltage cable joint temperature survey, but for a long time, there is installation and maintenance difficulty in optical fiber, there are the problems such as insulation hidden danger, optical fiber and cable splice insulating sheath are perfectly combined into one by the present invention, both solve Insulation Problems, solve again the problem of reliability.And the focus that can go directly of popping one's head in, react the working temperature of cable splice in real time accurately.
Summary of the invention
Patent of the present invention is a kind of method of optical fiber measurement high pressure, extra-high-tension cable connector temperature, and it is for solving the real time on-line monitoring of cable splice working temperature.Traditional cable splice optical fiber temperature monitoring method adopts special fixture that whole temperature-measuring optical fiber is fixed on cable splice surface, and serviceability temperature (FBG) demodulator predicts the actual temperature of cable splice by the real time temperature of monitoring outside surface.Existence can not the inner hot(test)-spot temperature of actual response, and affects the insulation characterisitic of cable splice reality, there is potential safety hazard.The present invention is on the basis of using for reference traditional scheme, brand-new design has been carried out to the optical fiber fixed form of optical fiber temperature-measurement, part fiber and probe are cast in advance in cable splice, temperature probe one end is cast in hotspot location, reserves the corresponding interface at the other end of optical fiber; Another part uses conventional methods and is fixed, and is connected and can realizes Signal transmissions with interface reserved during cast, eventually through the working temperature of temperature demodulation instrument real time on-line monitoring cable splice.Reduce the installation difficulty of temperature-measuring optical fiber, improve the installation effectiveness of temperature-measuring optical fiber, the temperature of monitoring more accurately and reliably.Technical solution of the present invention: (referring to claims)
The advantage that the present invention has:
1, the present invention's optical fiber of selecting insulating property good, long service life, does not affect the insulation characterisitic of cable splice.2, temperature-measuring optical fiber of the present invention selects the material identical with cable splice expansion coefficient, does not affect the shaping of optical fiber and insulating material.3, the focus of temperature probe direct cable joint of the present invention, accurately its working temperature of reflection.4, temperature-measuring optical fiber of the present invention adopts segmental structure, comprises outside temperature-measuring optical fiber, inner temperature-measuring optical fiber.5, temperature-measuring optical fiber of the present invention adopts segmental structure, and the process portion determining its temperature-measuring optical fiber mounting means can carry out in factory, decreases the field erected time, and it is reliable convenient to install.6, the present invention uses Shooting Technique to be cast in cable splice by temperature-measuring optical fiber, appearance looks elegant, reduces optical fiber and fixes difficulty.7, in the present invention, the joints of optical fibre adopt FC ceramic insertion core, adopt the form be threaded, and structure is simple, during connector docking, connect reliable, excellent optical performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the inner temperature-measuring optical fiber of the present invention;
Fig. 2 is the schematic cross-section of Fig. 1;
Fig. 3 is structural representation of the present invention (front view);
Fig. 4 is structural representation of the present invention (right view);
Wherein: 1 outside temperature-measuring optical fiber; 2 ST fibre-optical splices; 3 external fibers; 4 external fiber connectors; 5 inner temperature-measuring optical fibers; 6 switching inserts; 7 internal optical fibers; 8 temperature probes; 9 temperature probe stationary fixtures; 10 screws; 11 plug inserts; 12 cable bulkheads; 13 temperature demodulation instrument; 14 optical fiber interfaces.
Embodiment
Embodiment: a kind of method of optical fiber measurement high pressure, ultra-high voltage electric cable joint temperature as shown in Figure 3, it includes outside temperature-measuring optical fiber 1 and inner temperature-measuring optical fiber 5, temperature probe stationary fixture 9 and temperature demodulation instrument 13.As shown in Figure 1, Figure 2, Figure 4 shows, inner temperature-measuring optical fiber 5 comprises the switching inserts 6, internal optical fiber 7 and the temperature probe 8 that connect successively.Connection inserting part 6 surface is provided with ring groove and square flat body.Inner temperature-measuring optical fiber 5 is embedded in cable bulkhead 12 by the mode of cast, and ring groove and square flat body play and prevent connection inserting part 6 axial or radial movable.Temperature probe stationary fixture 9 is used to adopt screw 10 to be fixed on plug inserts 11 by temperature probe 8.External fiber 1 is connected with the connection inserting part 6 of internal optical fiber by connector 4 as shown in Figure 3, is connected, realize the real time on-line monitoring of the working temperature of cable bulkhead inserts 11 by ST fibre-optical splice 2 to the corresponding optical fiber interface 14 on temperature demodulation instrument 13.In cable splice course of normal operation, the plug inserts 11 in cable bulkhead 12 contacts with cable center tap position, can be measured the actual work temperature of cable splice by the working temperature measuring plug inserts 11.Plug inside is heated, 150 DEG C are heated to from 27 DEG C, record plug internal temperature data with temperature-measuring optical fiber and record cable end surface data with PT100 and contrast, in result display plug, temperature is respectively 27.3 DEG C, 30.3 DEG C, 39.7 DEG C, 50.6 DEG C, 60.8 DEG C, 70.4 DEG C, 80.3 DEG C, 89.7 DEG C, 99.9 DEG C, 110.3 DEG C, 120.4 DEG C, 130.2 DEG C, 139.8 DEG C, when 149.1 DEG C, the temperature that optical fiber temperature-measurement records is respectively 27 DEG C, 29.7 DEG C, 39.6 DEG C, 49.2 DEG C, 59.6 DEG C, 69.3 DEG C, 79.6 DEG C, 89.5 DEG C, 99.7 DEG C, 109.8 DEG C, 119.9 DEG C, 129.8 DEG C, 139.1 DEG C, 149.8 DEG C, temperature measurement accuracy is within ± 0.5 DEG C, and record cable end surface temperature with PT100 and be respectively 21.9 DEG C, 23.6 DEG C, 26.7 DEG C, 28.5 DEG C, 34.3 DEG C, 39.3 DEG C, 42.9 DEG C, 48.2 DEG C, 51.6 DEG C, 54.3 DEG C, 57.5 DEG C, 60.3 DEG C, 62.5 DEG C, 63.8 DEG C, temperature error is up to 86 DEG C.Can be found out by test, optical fiber temperature-measurement of the present invention can the true temperature of test cable head inside, and accuracy guarantee, stability is high.Traditional surface temperature measurement mode can not truly reflect cable end internal temperature.Thus, the present invention can realize the actual work temperature of Measurement accuracy cable splice, and by being cast in advance in cable splice by inner temperature-measuring optical fiber, during installation, temperature-measuring optical fiber does not take redundant space, not reducing the insulating property of cable splice, is a kind of safe and reliable cable splice temp measuring method.
Claims (4)
1. an optical fiber measurement high pressure, the method of extra-high-tension cable connector temperature, it is characterized in that: comprise outside temperature-measuring optical fiber 1 and inner temperature-measuring optical fiber 5, temperature probe stationary fixture 9 and temperature demodulation instrument 13, described external fiber 1 comprises the ST fibre-optical splice 2 connected successively, external fiber 3 and connector 4, described inner temperature-measuring optical fiber 5 comprises the switching inserts 6 connected successively, internal optical fiber 7 and temperature probe 8, temperature probe 8 is fixed on plug inserts 11 by screw 10 by described temperature probe stationary fixture 9, inner temperature-measuring optical fiber 5 is connected with external fiber connector 4 by switching inserts 6, external fiber 1 is connected with the optical fiber interface 14 of temperature demodulation instrument 13 by ST fibre-optical splice 2, realize the real time on-line monitoring of the working temperature of cable splice.
2. temperature-measuring optical fiber according to claim 1, it is characterized in that temperature-measuring optical fiber adopts segmental structure, the installation of its inner temperature-measuring optical fiber 5 can be carried out in factory.
3. temperature-measuring optical fiber according to claim 1, uses Shooting Technique to be cast in cable splice when it is characterized in that internal optical fiber 5 is installed.
4. temperature-measuring optical fiber according to claim 1, is characterized in that the impact of extraneous factors such as not being stressed after internal optical fiber 5 is built, does not affect the insulation characterisitic of cable splice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410127589.1A CN104977097A (en) | 2014-04-01 | 2014-04-01 | Method for measuring temperature of high-voltage/extra-high-voltage cable connector by using fiber |
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| CN201410127589.1A CN104977097A (en) | 2014-04-01 | 2014-04-01 | Method for measuring temperature of high-voltage/extra-high-voltage cable connector by using fiber |
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| CN104977097A true CN104977097A (en) | 2015-10-14 |
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| CN201410127589.1A Pending CN104977097A (en) | 2014-04-01 | 2014-04-01 | Method for measuring temperature of high-voltage/extra-high-voltage cable connector by using fiber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105716740A (en) * | 2016-04-12 | 2016-06-29 | 深圳市深电电力设备发展有限公司 | Electric power sheath having temperature measurement function |
| CN106124086A (en) * | 2016-08-15 | 2016-11-16 | 保定合力达电缆附件有限公司 | A kind of high tension cable silastic terminal temperature measuring equipment |
| CN106911118A (en) * | 2016-08-31 | 2017-06-30 | 全球能源互联网研究院 | A kind of power cable connector and preparation method thereof |
| CN107884080A (en) * | 2017-12-15 | 2018-04-06 | 安徽龙联智能光电有限公司 | A kind of cable optic fibre adapter assembly |
| CN107990990A (en) * | 2017-12-15 | 2018-05-04 | 安徽龙联智能光电有限公司 | A kind of temperature detection cable |
| WO2019173949A1 (en) * | 2018-03-12 | 2019-09-19 | Abb Schweiz Ag | Apparatus and method for monitoring temperature of cable joint of cable connected to gas insulated switchgear |
| US11022498B2 (en) | 2017-04-13 | 2021-06-01 | Abb Schweiz Ag | Measurement apparatus and power cable accessory and system using the same and assembling method therefor |
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| CN102509590A (en) * | 2011-11-23 | 2012-06-20 | 厦门Abb开关有限公司 | Optical fiber composite insulator for measuring temperature of high-voltage busbar and preparation method |
| CN202405009U (en) * | 2011-11-23 | 2012-08-29 | 厦门Abb开关有限公司 | Optical fiber composite insulator used for measuring temperature of high-voltage busbar |
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| KR20030045864A (en) * | 2001-12-01 | 2003-06-12 | 엘지전선 주식회사 | Temperature dector for underground power cables |
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| CN202405009U (en) * | 2011-11-23 | 2012-08-29 | 厦门Abb开关有限公司 | Optical fiber composite insulator used for measuring temperature of high-voltage busbar |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716740A (en) * | 2016-04-12 | 2016-06-29 | 深圳市深电电力设备发展有限公司 | Electric power sheath having temperature measurement function |
| CN105716740B (en) * | 2016-04-12 | 2019-03-01 | 深圳市深电电力设备发展有限公司 | A kind of electric power sheath with temp sensing function |
| CN106124086A (en) * | 2016-08-15 | 2016-11-16 | 保定合力达电缆附件有限公司 | A kind of high tension cable silastic terminal temperature measuring equipment |
| CN106124086B (en) * | 2016-08-15 | 2020-03-10 | 保定合力达电缆附件有限公司 | High tension cable silicon rubber terminal temperature measuring device |
| CN106911118A (en) * | 2016-08-31 | 2017-06-30 | 全球能源互联网研究院 | A kind of power cable connector and preparation method thereof |
| US11022498B2 (en) | 2017-04-13 | 2021-06-01 | Abb Schweiz Ag | Measurement apparatus and power cable accessory and system using the same and assembling method therefor |
| CN107884080A (en) * | 2017-12-15 | 2018-04-06 | 安徽龙联智能光电有限公司 | A kind of cable optic fibre adapter assembly |
| CN107990990A (en) * | 2017-12-15 | 2018-05-04 | 安徽龙联智能光电有限公司 | A kind of temperature detection cable |
| WO2019173949A1 (en) * | 2018-03-12 | 2019-09-19 | Abb Schweiz Ag | Apparatus and method for monitoring temperature of cable joint of cable connected to gas insulated switchgear |
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Application publication date: 20151014 |
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