CN104410029A - Non-contact deicer and method for power transmission line - Google Patents
Non-contact deicer and method for power transmission line Download PDFInfo
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- CN104410029A CN104410029A CN201410824962.9A CN201410824962A CN104410029A CN 104410029 A CN104410029 A CN 104410029A CN 201410824962 A CN201410824962 A CN 201410824962A CN 104410029 A CN104410029 A CN 104410029A
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- laser
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
Abstract
The invention discloses a non-contact deicer and method for a power transmission line. The non-contact deicer for the power transmission line comprises a laser, a laser scanning element and a controller, wherein the laser is used for outputting laser; the laser scanning element is used for adjusting and focusing the laser output by the laser and flatly scanning the power transmission line by using the laser; the controller is used for controlling operations of the laser and the laser scanning element; the laser is a pulse laser; output power and area of the laser can be adjusted; scanning step length and scanning frequency of the laser scanning element can be adjusted.
Description
Technical field
The present invention relates to the deicing of transmission line, especially relate to the laser deicing of transmission line.
Background technology
Powerline ice-covering accumulated snow threatens the safe and reliable operation of electric power and communication network.The great threat that powerline ice-covering brings to the safe and stable operation of electrical network, serious icing can cause ice to dodge tripping operation, wire breaking and tower falling, conductor galloping, device damage etc., even occurs grid disconnection and large area blackout.Therefore clearing ice technology is being studied always by many countries, aims to provide power supply and communication service the most reliably.The reason of electrical network icing is except rare long-time on a large scale low temperature, sleet and snow ice weather, and electrical network is resisted outside harsh weather scarce capacity, also has a major reason to lack effective deicing means exactly.
The deicing of current power transmission circuit and de-icing method are broadly divided into a few class: heating power deicing method, mechanical deicing's method, passive de-icing method and mixing de-icing method.But the existing de-icing method that melts is not also very fully up to expectations, fully can not ensure the safe and reliable operation of electric power system, have various defect, as energy consumption is too high, technology is immature, fail safe is not high, complex operation, deicing efficiency are too low.
Laser deicing technology is the clearing ice technology just risen, there is the advantage that other de-icing methods a lot of can not be compared, utilize the advantages such as the good directionality of laser, energy directional efficiency of transmission are high, contactless effect, removing high-voltage line, ice sheet accompanying by high-tension porcelain insulator string list face fast when not power-off, is the contactless clearing ice technology with wide application prospect.
At present, laser deicing has two kinds of different technology paths: a kind of is LASER HEATING ice melting as described in 200820010557.3, continuous print laser is used to irradiate icing equipment, the energy of laser is absorbed by ice sheet and equipment surface respectively, icing layer will be divided into fritter, the ice sheet contacted with equipment surface is also melted, and icing comes off due to the gravity of self; One is also had to be use by stress wave activity, ice cube to be broken, as the de-icing method in 200810044590.2, the pulsed laser irradiation icing equipment of ultra high power density, laser is at ice sheet and equipment interface vaporizing section icing rapidly, the Shock Wave produced is in ice sheet, make ice sheet broken, thus reach the object removing icing.These two kinds of methods respectively have pluses and minuses, and first method utilizes LASER HEATING, large to horsepower requirements, and the hard icing layer very strong to adhesion melts relative difficulty, but its power density is low, can not cause damage to electric wire; Second method uses the laser pulse of ultra high power density to make ice sheet produce stress wave, make ice sheet broken with deicing, except speed of icing is fast, but ultra high power density laser easily damages power transmission and transforming equipment, if laser irradiation time is too short, only generating portion crackle or crackle are dark, and deicing effect is bad, and laser irradiation time is long may damage power transmission and transforming equipment.
The present invention is the improvement to above-mentioned two kinds of laser deicing methods, provides more efficient laser deicing method and apparatus.
Summary of the invention
According to an aspect of the present invention, provide a kind of contactless deicer of transmission line, comprise laser, laser scanning element and controller, described laser is used for Output of laser, the adjustment of laser Output of laser can focus on by described laser scans element, and makes laser carry out flat scanning to transmission line, and described controller is for controlling the operation of laser and laser scanning element; It is characterized in that: described laser is pulse laser, its power output and area can regulate, pulsed laser energy is 2J ~ 20J, and the laser spot diameter that high voltage transmission line is formed is 0.5cm ~ 4cm, and laser facula mean energy density is 0.5Jcm-2 ~ 20Jcm-2; Scanning step and the scanning frequency of described laser scanning element can regulate; Described controller can control described laser and described laser scanning element carries out following rescan successively: the first scanning, power output 10J ~ the 20J of laser is set, laser spot diameter 0.5cm ~ 2cm, laser mean energy density is 10Jcm-2 ~ 20Jcm-2, uses the first scanning step and the first scanning frequency to scan; Second scanning, arrange the power output 2J ~ 5J of laser, laser spot diameter 2cm ~ 4cm, laser facula mean energy density is 0.5Jcm-2 ~ 10Jcm-2, uses the second scanning step and the second scanning frequency to scan.
Preferably, in such scheme, described second scanning step is greater than the first scanning step, and described second scanning frequency is lower than the first scanning frequency.
Preferably, in such scheme, the direction of described second scanning is contrary with the direction that first scans.
According to another aspect of the present invention, provide a kind of de-icing method of contactless deicer of above-mentioned transmission line, comprise the steps: that described deicing equipment moves near distance icing aerial high voltage power line by (1); (2) laser is focused, make laser form laser facula on icing aerial high voltage power line; (3) adjust the output parameter of laser, Laser output energy is set to the first output parameter, uses the first scanning step and the first scanning frequency to scan; (4) power output of laser is set, Laser output energy is set to the second output parameter, use the second scanning step and the second scanning frequency to scan.
Preferably, in above-mentioned de-icing method, the laser mean energy density of described second output parameter is lower than the laser mean energy density of the first output parameter.
Preferably, in above-mentioned de-icing method, described first output parameter is power output 10J ~ 20J, laser spot diameter 0.5cm ~ 2cm, laser mean energy density is 10Jcm-2 ~ 20Jcm-2, second output parameter is power output 2J ~ 10J, laser spot diameter 2cm ~ 4cm, and laser facula mean energy density is 0.5Jcm-2 ~ 10Jcm-2.
Preferably, in above-mentioned de-icing method, described second scanning step is greater than the first scanning step, and described second scanning frequency is lower than the first scanning frequency.
Preferably, in above-mentioned de-icing method, the direction of described second scanning is contrary with the direction that first scans.
Preferably, in said method, the starting point of described second scanning and the first terminal scanned are spaced apart the half of the first scanning step.
Accompanying drawing explanation
Fig. 1 is the application schematic diagram of the contactless deicer in the present invention;
Fig. 2 is the scan mode schematic diagram of contactless deicer in the present invention.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
See Fig. 1, the contactless deicer of transmission line of the present invention, comprises laser 1, laser scanning element 2 and controller 3.Laser 1 is pulse laser, and its power output and area can regulate, for Output of laser.The optical maser wavelength of laser 1 is 400nm ~ 1100nm, pulsed laser energy is 10J ~ 20J, laser pulse width full duration is 10ns ~ 100ns, laser repetition rate is 1Hz ~ 10Hz, output parameter adjustable extent is pulsed laser energy is 2J ~ 20J, the laser spot diameter that high voltage transmission line is formed is 0.5cm ~ 4cm, and laser facula mean energy density is 0.5Jcm-2 ~ 20Jcm-2; In laser output parameters, power output 10J ~ 20J, laser spot diameter 0.5cm ~ 2cm, laser mean energy density is 10Jcm-2 ~ 20Jcm-2, is high laser mean energy density parameter section, and when using this output parameter, laser makes ice sheet produce stress wave; In laser output parameters, power output 2J ~ 10J, laser spot diameter 2cm ~ 4cm, laser facula mean energy density is 0.5Jcm-2 ~ 10Jcm-2, and be low laser mean energy density parameter section, when using this output parameter, laser makes ice sheet generation hot melt.The adjustment of laser 1 Output of laser can focus on by laser scans element 2, and makes laser carry out flat scanning to transmission line 4, and laser scanning element 2 can use laser regulating element of the prior art, as the scanning galvanometer in 200910062006.0.Controller 3 is for controlling the operation of laser 1 and laser scanning element 2.
Controller 3 can control laser 1 and laser scanning element 2 carries out following rescan successively: the first scanning is stress wave scanning, power output 10J ~ the 20J of laser is set, laser spot diameter 0.5cm ~ 2cm, laser mean energy density is 10Jcm-2 ~ 20Jcm-2, using the first scanning step and the first scanning frequency to scan, can be that time of scanning than conventional stress wave is short by the set of time that first scans; Second scanning is hot melt scanning, and arrange the power output 2J ~ 10J of laser, laser spot diameter 2cm ~ 4cm, laser facula mean energy density is 0.5Jcm-2 ~ 10Jcm-2, uses the second scanning step and the second scanning frequency to scan.First scanning and the second scanning are flat scanning, can use triangular scanning as described in Figure 2, square scanning, or sin/cos scanning, and the step-length wherein scanned is λ, and frequency is f.By such mode, first service time, shorter stress wave scanning made icing occur crackle, then by hot melt scanning, fragmented parts was melted thus ice cube is fallen due to deadweight.Thus on the one hand, when avoiding stress wave scanning, the long damage to power transmission and transforming equipment of laser irradiation time, on the other hand, by carrying out thermosol scanning to the icing generating crackle, accelerating it and melting rupture process, having saved hot melt energy consumption.
Preferably, because the diameter of thermal flux laser is comparatively large, hot melt scanning step can be set to be greater than stress wave scanning step, the area irradiating electric wire also can not be caused inadequate; And because its laser mean energy density energy is lower, damage can not be caused to power transmission and transforming equipment, when carrying out hot melt scanning, the frequency of scanning can be reduced, thus making icing absorb more heat.Preferably, the direction of hot melt scanning is contrary with the direction that stress wave scans, and as in Fig. 2, stress wave scanning is for from left to right, and hot melt scanning is for from right to left.Preferably, the terminal that the starting point of described hot melt scanning and stress wave scan is spaced apart the half of stress wave scanning step.
Apply specific embodiment herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications.In sum, this description should not be construed as limitation of the present invention.
Claims (7)
1. the contactless deicer of a transmission line, comprise laser, laser scanning element and controller, described laser is used for Output of laser, the adjustment of laser Output of laser can focus on by described laser scans element, and make laser carry out flat scanning to transmission line, described controller is for controlling the operation of laser and laser scanning element; It is characterized in that: described laser is pulse laser, its power output and area can regulate, pulsed laser energy is 2J ~ 20J, and the laser spot diameter that high voltage transmission line is formed is 0.5cm ~ 4cm, and laser facula mean energy density is 0.5Jcm-2 ~ 20Jcm-2; Scanning step and the scanning frequency of described laser scanning element can regulate; Described controller can control described laser and described laser scanning element carries out following rescan successively: the first scanning, power output 10J ~ the 20J of laser is set, laser spot diameter 0.5cm ~ 2cm, laser mean energy density is 10Jcm-2 ~ 20Jcm-2, uses the first scanning step and the first scanning frequency to scan; Second scanning, arrange the power output 2J ~ 10J of laser, laser spot diameter 2cm ~ 4cm, laser facula mean energy density is 0.5Jcm-2 ~ 5Jcm-2, uses the second scanning step and the second scanning frequency to scan.
2. contactless deicer according to claim 1, is characterized in that: described second scanning step is greater than the first scanning step, and described second scanning frequency is lower than the first scanning frequency.
3. contactless deicer according to claim 2, is characterized in that: the direction of described second scanning is contrary with the direction that first scans.
4. a de-icing method for the contactless deicer of transmission line, comprises the steps: that described deicing equipment moves near distance icing aerial high voltage power line by (1); (2) laser is focused, make laser form laser facula on icing aerial high voltage power line; (3) adjust the output parameter of laser, Laser output energy is set to the first output parameter, uses the first scanning step and the first scanning frequency to scan; (4) power output of laser is set, Laser output energy is set to the second output parameter, use the second scanning step and the second scanning frequency to scan.
5. method according to claim 4, is characterized in that: the laser mean energy density of described second output parameter is lower than the laser mean energy density of the first output parameter.
6. method according to claim 5, it is characterized in that: described first output parameter is power output 10J ~ 20J, laser spot diameter 0.5cm ~ 2cm, laser mean energy density is 10Jcm-2 ~ 20Jcm-2, second output parameter is power output 2J ~ 10J, laser spot diameter 2cm ~ 4cm, laser facula mean energy density is 0.5Jcm-2 ~ 10Jcm-2.
7. the contactless deicer of a transmission line, comprise laser, laser scanning element and controller, described laser is used for Output of laser, the adjustment of laser Output of laser can focus on by described laser scans element, and make laser carry out flat scanning to transmission line, described controller is for controlling the operation of laser and laser scanning element.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810775A (en) * | 2015-05-26 | 2015-07-29 | 邢永安 | Automatic quadrotor laser deicing device capable of taking electricity in conduction manner for high-voltage transmission line |
| CN106498826A (en) * | 2016-12-02 | 2017-03-15 | 温州职业技术学院 | Based on the road surface deicing method that laser constrains vaporization foamable polymer |
| CN106654992A (en) * | 2016-11-24 | 2017-05-10 | 温州职业技术学院 | Laser deicing method for power transmission line |
| CN108599078A (en) * | 2018-06-16 | 2018-09-28 | 南京理工大学 | A kind of laser deicing method based on path planning |
| CN109572946A (en) * | 2018-12-27 | 2019-04-05 | 北京华夏光谷光电科技有限公司 | Suresh Kumar high power laser Ice Breaking System |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810775A (en) * | 2015-05-26 | 2015-07-29 | 邢永安 | Automatic quadrotor laser deicing device capable of taking electricity in conduction manner for high-voltage transmission line |
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| CN106654992B (en) * | 2016-11-24 | 2018-04-24 | 温州职业技术学院 | A kind of power transmission line laser deicing method |
| CN106498826A (en) * | 2016-12-02 | 2017-03-15 | 温州职业技术学院 | Based on the road surface deicing method that laser constrains vaporization foamable polymer |
| CN106498826B (en) * | 2016-12-02 | 2018-10-26 | 温州职业技术学院 | The road surface deicing method of vaporization foamable polymer is constrained based on laser |
| CN108599078A (en) * | 2018-06-16 | 2018-09-28 | 南京理工大学 | A kind of laser deicing method based on path planning |
| CN109572946A (en) * | 2018-12-27 | 2019-04-05 | 北京华夏光谷光电科技有限公司 | Suresh Kumar high power laser Ice Breaking System |
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Inventor after: Hu Ming Inventor after: Liang Zhoufeng Inventor after: Guo Jianghao Inventor after: Liu Weidong Inventor after: Lu Jiaxiang Inventor after: Chen Zhipeng Inventor after: Guo Dawei Inventor after: Li Jinfeng Inventor after: Xiang Huaichang Inventor after: Chen Xianglong Inventor after: Sun Hongyan Inventor before: Zhao Dongxu |
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Effective date of registration: 20170104 Address after: 276800 Rizhao City new town, Shandong, No. 5 Applicant after: RIZHAO SUNSHINE ELECTRIC POWER DESIGN CO., LTD. Applicant after: Rizhao Power Supply Company of State Grid Shandong Province Electric Power Company Applicant after: State Power Networks Co Address before: The road of Songshan Lake Science and Technology Industrial Park in Guangdong city of Dongguan Province, No. 2 523808 Applicant before: Zhao Dongxu |
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