CN112345117A - Method for monitoring temperature of cable in fan based on optical fiber sensor - Google Patents
Method for monitoring temperature of cable in fan based on optical fiber sensor Download PDFInfo
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- CN112345117A CN112345117A CN202011235884.0A CN202011235884A CN112345117A CN 112345117 A CN112345117 A CN 112345117A CN 202011235884 A CN202011235884 A CN 202011235884A CN 112345117 A CN112345117 A CN 112345117A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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Abstract
The invention discloses a method for monitoring the temperature of a cable in a fan based on an optical fiber sensor, which comprises a distributed optical fiber temperature measurement monitoring system, a distributed optical fiber temperature measurement device and a fire-fighting linkage system, wherein the distributed optical fiber temperature measurement device is connected with the distributed optical fiber temperature measurement monitoring system, the fire-fighting linkage system is connected with the distributed optical fiber temperature measurement monitoring system, the distributed optical fiber temperature measurement device comprises a temperature measurement host, a temperature sensing optical cable, a monitoring host, monitoring software, a display screen and an optical fiber fusion box, the temperature measurement host, the monitoring software, the display screen and the optical fiber fusion box are arranged in an optical fiber temperature measurement screen cabinet, the optical fiber temperature measurement screen cabinet is arranged in a booster station, the invention measures the temperature of the cable in the fan by using the existing OPGW optical cable channel and the temperature sensing optical cable arranged in the fan, and, the laying length of the temperature sensing optical cable is reduced, and the investment cost is effectively reduced while the requirements of various temperature measuring indexes are met.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a method for monitoring the temperature of a cable in a fan based on an optical fiber sensor.
Background
Cable heating is a common phenomenon in power operation, the risk of cable heating is increased along with the increase of the power cable operation time at any time, and cable fire faults also account for a large part of the whole electrical accident, so that great threat is brought to safe power transmission. As cables themselves, whatever cause causes a fire accident, they undergo the following processes when they catch fire: insulation damage at a certain part of the cable → intermittent or continuous discharge → obvious reduction of the insulation of the cable and local heating → explosion or electric arc at a certain part of the cable and generation of poor gas → fire of the whole cable bridge. Because the cable safety problem has the characteristics of strong fault contingency and great disaster loss, the fire alarm and fire extinguishing system is triggered after the fault is worsened, the great loss is inevitable often, the cost of the fire extinguishing system is high, and the functional and economic effectiveness of the fire extinguishing system is yet to be verified. Power management has placed preventive maintenance at a top priority, particularly encouraging the development of automation equipment capable of wide-range real-time monitoring. The wind power station has the advantages that the number of wind power generation sets is large, the types of the wind power generation sets are various, cables are distributed in each fan, the cables penetrate through the whole tower drum from a cabin, the detection of the cables in the fans belongs to high-altitude operation, the tower drum with the height of at least 70 meters needs to be climbed every time, the operation surface is narrow, certain dangerousness exists relative to the ground, and the working strength is extremely high.
At present, two temperature measuring means aiming at cables inside a fan comprise fiber bragg grating temperature measurement and a flame detector, and the two modes are point-type temperature measurement. The sensor used by the fiber grating temperature measurement system is protected and packaged by thick stainless steel, and the response time to temperature change is long. The flame detector needs to have higher visibility when exposed to fire, smoke and shelters at the initial stage of fire are easy to cause false alarm, and the flame detector adopts electric signal sensing, is easy to be interfered by electromagnetic waves and has higher false alarm rate. The optical fiber sensor adopts optical signal sensing, is intrinsically safe, is not interfered by electromagnetism, does not influence the existing running equipment, has strong environmental adaptability, leads temperature measurement precision and extremely low false alarm rate, and therefore, the method for monitoring the temperature of the cable in the fan based on the optical fiber sensor is provided.
Disclosure of Invention
The invention aims to provide a method for monitoring the temperature of a cable in a fan based on an optical fiber sensor, which measures the temperature of the cable in the fan by using the existing OPGW optical cable channel and the temperature sensing optical cable arranged in the fan in a wind power plant, can reduce the laying length of the temperature sensing optical cable while using the existing optical fiber channel, and effectively reduces the investment cost while meeting the requirements of various temperature measurement indexes.
In order to achieve the purpose, the invention provides the following technical scheme: a method for monitoring the temperature of a cable in a fan based on an optical fiber sensor comprises a distributed optical fiber temperature measurement monitoring system, a distributed optical fiber temperature measurement device and a fire-fighting linkage system, wherein the distributed optical fiber temperature measurement device is connected with the distributed optical fiber temperature measurement monitoring system, the fire-fighting linkage system is connected with the distributed optical fiber temperature measurement monitoring system, the distributed optical fiber temperature measurement device comprises a temperature measurement host, a temperature sensing optical cable, a monitoring host, monitoring software, a display screen and an optical fiber fusion box, the temperature measurement host, the monitoring software, the display screen and the optical fiber fusion box are installed in an optical fiber temperature measurement screen cabinet, the optical fiber temperature measurement screen cabinet is installed in a booster station, the temperature sensing optical cable is laid in the optical fiber temperature measurement screen cabinet and is fused with a tail fiber connected with the temperature measurement host in the optical fiber fusion box, the temperature measurement host transmits, and transmitting the temperature and the alarm information to a distributed optical fiber temperature measurement monitoring system through a network.
Preferably, the monitoring host is arranged below the display screen, a keyboard and a mouse are arranged below the monitoring host, and an optical fiber fusion box is arranged below the temperature measuring host.
Preferably, the distributed optical fiber temperature measuring device is provided with eight temperature measuring channels, the temperature measuring channels are in fusion joint with the temperature sensing optical cables on the fan side by using the existing OPGW transmission optical cables, the single channel can be used for serial connection of the temperature sensing optical cables of 1-10 wind turbine generators according to the actual distribution condition of the wind turbine generators, the wind turbine generators are connected by using the existing OPGW optical cables, and the tail ends of the channels do not need to be connected with any equipment.
Preferably, the single channel only adopts the temperature sensing optical cable inside the wind turbine generator.
Preferably, the temperature sensing optical cable is laid along the upper surface of the OPGW transmission optical cable body, the temperature sensing optical cable is laid in an S-shaped mode, and the temperature sensing optical cable is fixed by a binding belt every 1.5 meters.
Preferably, the temperature sensing optical cable is laid at the cable joint in a winding mode, and the cable joint is completely surrounded to form comprehensive monitoring.
The invention provides a method for monitoring the temperature of a cable in a fan based on an optical fiber sensor, which has the following beneficial effects:
(1) the invention utilizes the existing OPGW optical cable transmission channel to monitor the temperature of the cable in the wind turbine generator in a distributed way by arranging the temperature sensing optical cable in the wind turbine generator. The optical fiber is a sensor and a transmission channel, and the sensing and transmission integration is realized. The optical fiber temperature measurement system has the characteristics of large-range multipoint temperature measurement and accurate positioning, distributed temperature measurement is adopted, one temperature measurement point can be taken at every 0.4m interval at minimum, the temperature measurement point covers the whole cable body, the temperature state of the cable is monitored in real time, alarm prevention accident expansion is timely realized when the temperature change exceeds a threshold value, the accurate positioning function can assist operation and maintenance personnel to quickly determine the fault point, the fault processing period is greatly shortened, and the operation and maintenance of the cable in the wind turbine generator set are real-time, accurate, efficient and reliable assistance is provided for safe and stable operation of the wind turbine generator set.
(2) The invention utilizes the mode of the existing OPGW optical cable channel of the wind power plant and the temperature sensing optical cable arranged in the fan to measure the temperature of the cable in the fan, can reduce the laying length of the temperature sensing optical cable while utilizing the existing optical fiber channel, and effectively reduces the investment cost while meeting the requirements of various temperature measuring indexes.
Drawings
FIG. 1 is a distributed optical fiber temperature measurement monitoring system architecture of the present invention;
FIG. 2 is a layout diagram of a fiber optic temperature cabinet according to the present invention;
FIG. 3 is a schematic representation of an S-lay of the fiber optic cable of the present invention;
fig. 4 is a schematic diagram of the cable splice cable wrap of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 4, the present invention provides a technical solution: a method for monitoring the temperature of a cable in a fan based on an optical fiber sensor comprises a distributed optical fiber temperature measurement monitoring system, a distributed optical fiber temperature measurement device and a fire-fighting linkage system, wherein the distributed optical fiber temperature measurement device is connected with the distributed optical fiber temperature measurement monitoring system, the fire-fighting linkage system is connected with the distributed optical fiber temperature measurement monitoring system, the distributed optical fiber temperature measurement device comprises a temperature measurement host, a temperature sensing optical cable, a monitoring host, monitoring software, a display screen and an optical fiber fusion box, the temperature measurement host, the monitoring software, the display screen and the optical fiber fusion box are installed in an optical fiber temperature measurement screen cabinet, the optical fiber temperature measurement screen cabinet is installed in a booster station, the temperature sensing optical cable is laid in the optical fiber temperature measurement screen cabinet and is fused with a tail fiber connected with the temperature measurement host in the optical fiber fusion box, the temperature measurement host transmits, and transmitting the temperature and the alarm information to a distributed optical fiber temperature measurement monitoring system through a network.
The monitoring host is arranged below the display screen, a keyboard and a mouse are arranged below the monitoring host, and an optical fiber fusion box is arranged below the temperature measuring host.
Distributed optical fiber temperature measuring device is equipped with the temperature measurement passageway, and the temperature measurement passageway is equipped with eight groups, the temperature measurement passageway utilizes current OPGW transmission optical cable, carries out the butt fusion at the fan side with the temperature sensing optical cable, according to the wind turbine generator system actual distribution condition, single passageway can carry out the serial link of 1-10 wind turbine generator system temperature sensing optical cables, links with existing OPGW optical cable between the wind turbine generator system, and the passageway end need not to link any equipment, and single passageway only adopts the temperature sensing optical cable in wind turbine generator system inside, through setting up multiunit temperature measurement passageway, can cover comprehensively and detect multiunit fan, guarantees the comprehensiveness that detects.
The temperature sensing optical cable is laid along the upper surface of the OPGW transmission optical cable body, the temperature sensing optical cable is laid in an S-shaped mode, the temperature sensing optical cable is fixed by a binding belt at intervals of 1.5 meters, the temperature sensing optical cable can be tightly attached to the surface of the OPGW transmission optical cable through the fixation of the binding belt, and the temperature measuring point covers the whole cable body.
The temperature sensing optical cable is laid at the cable joint in a winding mode, the cable joint is completely surrounded, comprehensive monitoring is formed, the fault high-rise position can be monitored in a focused mode, and therefore the accuracy of a monitoring result is guaranteed.
It should be noted that, in the method for monitoring the temperature of the cable in the fan based on the optical fiber sensor, eight temperature measuring channels are arranged in the temperature measuring device. The temperature measuring channel is fused with a temperature sensing optical cable at the fan side by using the existing OPGW transmission optical cable, taking a channel I and a channel II as an example according to the actual distribution condition of the wind turbine generator, wherein the channels 1 to 10 correspond to the serial number of the wind turbine generator, the temperature sensing optical cable is only adopted in the wind turbine generator for a single channel, the existing OPGW optical cable is used for linking the channels 1 to 10, no equipment is needed to be linked at the tail end of the channel II, the channels 11 to 19 correspond to the serial number of the wind turbine generator, the existing OPGW optical cable is used for linking the channels 11 to 19, the OPGW optical cable tail fiber is fused again by an optical fiber fusion box and then is connected into the temperature measuring device, wherein the temperature sensing optical cable is laid along the upper surface of the OPGW transmission optical cable body, as a plurality of cables are arranged in the cable channel in the wind turbine generator, the temperature sensing optical cable is laid in an S-type mode, and is stranded and fixed, and the cable joint is used as a fault high-occurrence position to be monitored, the temperature sensing optical cable is laid in a winding mode and fully surrounds the cable joint, so that the temperature measuring point covers the whole cable body to form comprehensive monitoring, each OPGW transmission optical cable body is provided with the temperature sensing optical cable, when the temperature sensing optical cable is used, the temperature sensing optical cable transmits the temperature of the OPGW transmission optical cable body to a temperature measuring host of the distributed optical fiber temperature measuring device by using light waves, the temperature measuring host converts the temperature into a temperature value and transmits the temperature value to a monitoring host, the temperature is monitored by using monitoring software in the monitoring host, when the temperature exceeds a set threshold value, the temperature information, alarm information and position information are transmitted to the distributed optical fiber temperature measuring monitoring system through a network, the distributed optical fiber temperature measuring monitoring system transmits the information to operation and maintenance personnel, and the operation and maintenance personnel can quickly determine the fault point and greatly shorten the fault processing period, according to the invention, on the premise of utilizing the existing OPGW optical cable transmission channel, the temperature of the cable in the wind turbine generator is monitored in a distributed manner by arranging the temperature sensing optical cable in the wind turbine generator, the characteristics of large-range multi-point measurement temperature and accurate positioning are realized, the temperature measuring point covers the whole cable body, the temperature state of the cable is monitored in real time, the temperature change is found to exceed the threshold value, the accident is alarmed and prevented from being enlarged in time, the operation and maintenance of the cable in the wind turbine generator are real-time, accurate and efficient, and reliable assistance is provided for the safe and stable operation of the wind power plant, the laying length of the temperature sensing optical cable is reduced by utilizing the existing OPGW optical cable channel in the wind power plant, and the investment cost is effectively reduced while.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method for monitoring the temperature of a cable in a fan based on an optical fiber sensor is characterized by comprising a distributed optical fiber temperature measurement monitoring system, a distributed optical fiber temperature measurement device and a fire-fighting linkage system, wherein the distributed optical fiber temperature measurement device is connected with the distributed optical fiber temperature measurement monitoring system, the fire-fighting linkage system is connected with the distributed optical fiber temperature measurement monitoring system, the distributed optical fiber temperature measurement device comprises a temperature measurement host, a temperature sensing optical cable, a monitoring host, monitoring software, a display screen and an optical fiber fusion box, the temperature measurement host, the monitoring software, the display screen and the optical fiber fusion box are installed in an optical fiber temperature measurement screen cabinet, the optical fiber temperature measurement screen cabinet is installed in a booster station, the temperature sensing optical cable is laid in the optical fiber temperature measurement screen cabinet and is fused with a tail fiber connected with the temperature measurement host in the optical fiber fusion box, the temperature measurement host measures the, and transmitting the temperature and the alarm information to a distributed optical fiber temperature measurement monitoring system through a network.
2. The method for monitoring the temperature of the cable in the wind turbine based on the optical fiber sensor is characterized in that: the monitoring host is arranged below the display screen, a keyboard and a mouse are arranged below the monitoring host, and an optical fiber fusion box is arranged below the temperature measuring host.
3. The method for monitoring the temperature of the cable in the wind turbine based on the optical fiber sensor is characterized in that: the distributed optical fiber temperature measuring device is provided with eight temperature measuring channels, the temperature measuring channels are in fusion joint with temperature sensing optical cables on the fan side by using the existing OPGW transmission optical cables, serial connection of 1-10 temperature sensing optical cables of the wind turbine generators can be carried out through a single channel according to the actual distribution condition of the wind turbine generators, the wind turbine generators are connected through the existing OPGW optical cables, and the tail ends of the channels do not need to be connected with any equipment.
4. The method for monitoring the temperature of the cable in the wind turbine based on the optical fiber sensor is characterized in that: the single channel only adopts a temperature sensing optical cable in the wind turbine generator.
5. The method for monitoring the temperature of the cable in the wind turbine based on the optical fiber sensor is characterized in that: the temperature sensing optical cable is laid along the upper surface of the OPGW transmission optical cable body, the temperature sensing optical cable is laid in an S-shaped mode, and the temperature sensing optical cable is fixed by a binding belt every 1.5 meters.
6. The method for monitoring the temperature of the cable in the wind turbine based on the optical fiber sensor is characterized in that: the temperature sensing optical cable is laid at the cable joint in a winding mode, and the cable joint is completely surrounded to form comprehensive monitoring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011235884.0A CN112345117A (en) | 2020-11-09 | 2020-11-09 | Method for monitoring temperature of cable in fan based on optical fiber sensor |
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| CN202011235884.0A CN112345117A (en) | 2020-11-09 | 2020-11-09 | Method for monitoring temperature of cable in fan based on optical fiber sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625800A (en) * | 2021-08-19 | 2021-11-09 | 江苏浦盛安消防机电工程有限公司 | Linkage system based on distributed optical fiber temperature measurement |
| CN113669637A (en) * | 2021-07-15 | 2021-11-19 | 安徽复盛信息科技有限公司 | Drainage pipeline monitoring system capable of realizing leakage point positioning based on distributed optical fiber |
| CN115235647A (en) * | 2021-04-01 | 2022-10-25 | 中核核电运行管理有限公司 | Temperature measurement method for outer body of nuclear power station transformer |
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| CN104142186A (en) * | 2014-07-08 | 2014-11-12 | 国网山东省电力公司青岛供电公司 | Remote optical fiber cable temperature detection alarm system and method |
| CN207379627U (en) * | 2017-06-23 | 2018-05-18 | 河南省卓越电缆有限公司 | Electrical cable intelligent temperature measurement and alarm device |
| CN108088585A (en) * | 2018-01-10 | 2018-05-29 | 杭州光传科技有限公司 | A kind of oil gas storage tank monitoring distribution type fiber-optic heat detector and control method |
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2020
- 2020-11-09 CN CN202011235884.0A patent/CN112345117A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104142186A (en) * | 2014-07-08 | 2014-11-12 | 国网山东省电力公司青岛供电公司 | Remote optical fiber cable temperature detection alarm system and method |
| CN207379627U (en) * | 2017-06-23 | 2018-05-18 | 河南省卓越电缆有限公司 | Electrical cable intelligent temperature measurement and alarm device |
| CN108088585A (en) * | 2018-01-10 | 2018-05-29 | 杭州光传科技有限公司 | A kind of oil gas storage tank monitoring distribution type fiber-optic heat detector and control method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115235647A (en) * | 2021-04-01 | 2022-10-25 | 中核核电运行管理有限公司 | Temperature measurement method for outer body of nuclear power station transformer |
| CN113669637A (en) * | 2021-07-15 | 2021-11-19 | 安徽复盛信息科技有限公司 | Drainage pipeline monitoring system capable of realizing leakage point positioning based on distributed optical fiber |
| CN113625800A (en) * | 2021-08-19 | 2021-11-09 | 江苏浦盛安消防机电工程有限公司 | Linkage system based on distributed optical fiber temperature measurement |
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