CN105826860A - Method for melting ice and snow of transmission line - Google Patents
Method for melting ice and snow of transmission line Download PDFInfo
- Publication number
- CN105826860A CN105826860A CN201610287396.1A CN201610287396A CN105826860A CN 105826860 A CN105826860 A CN 105826860A CN 201610287396 A CN201610287396 A CN 201610287396A CN 105826860 A CN105826860 A CN 105826860A
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- Prior art keywords
- ice
- melt
- snow
- transmission line
- ground wire
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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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention discloses a method for melting ice and snow of a transmission line. Piezoresistors, a direct current ice and snow melting device and a plurality of short circuit wires are included, the piezoresistors are installed between a ground wire and a tower in a transmission line section that needs ice and snow melting and between the ground wire of the transmission line section that needs ice melting and a ground wire of another section, the short circuit wires are used for connecting the transmission line after a power cut and a ground wire of a line selection section, and two poles of the direct current ice and snow melting device are connected two phases of the transmission line. After ice melting work is completed, semi-insulating transformation facilities do not need to be dismantled, thereby facilitating ice melting operation of the next time, and thus the method for melting ice and snow of the transmission line is extremely low in cost, the workload of ice melting is greatly reduced, and the ice melting efficiency is improved.
Description
Technical field
The invention belongs to electric function technical field, be specifically related to the ice-melt snow-smelting method of a kind of transmission line of electricity.
Background technology
Transmission line of electricity institute, through local climate complicated condition, easily causes serious icing, has a strong impact on transmission line of electricity safe and stable operation, at present, it is possible to alleviate the most economical effective method of powerline ice-covering loss, is that transmission line of electricity is carried out electric current ice-melt work；Ground wire induction reactance is big, typically takes DC ice melting, and UHV transmission line ground wire typically be directly connected to, ice melting current cannot be directly applied on aerial earth wire.In existing ground wire deicing technology, typically taking two ground wire series connection ice-melts, and extra-high voltage ground wire circuit length, resistance are big, general deicing device cannot meet ice-melt capacity requirement.And, more existing ground wire deicing methods to be taked discharging gap aerial earth wire carries out all insulation transformation, but when icing is serious, discharging gap is likely to bridge because of icing, aerial earth wire is still within ground state, it is impossible to implement ice-melt；And circuit is carried out all insulation transformation, after ice-melt completes, also need to remove the facility of transformation, waste time and energy；If needing repeatedly ice-melt, transformation and dismounting to circuit will take substantial amounts of time and work energy.
Summary of the invention
It is an object of the invention to provide one and can quickly transmission line of electricity be carried out ice-melt snow melt operation, it is only necessary to once transformation can complete to repeat ice-melt work, and the ice-melt snow-smelting method of the transmission line of electricity that flexible operation is simple, deicing device capacity is little, with low cost.
For achieving the above object and other relevant purposes, the present invention provides below scheme:
The ice-melt snow-smelting method of a kind of transmission line of electricity, comprises the steps:
(1), choose and easily occur icing disaster to need the transmission line of electricity section of ice-melt snow melt, semi-insulating transformation is carried out: according to line ice coating situation to choosing section place ground portion, determine ice-melt snow melt distance, the resistance in selected ice-melt loop is calculated according to ice-melt distance, one group of varistor is installed between every grade of shaft tower and ground wire additional in section, this section ground wire installs one group of varistor additional with other section ground wire and is connected, the through-current capability of varistor determines according to the overcurrent multiple of circuit, the residual voltage value of varistor determines according to the maximum output voltage of DC ice melting device for melting snow；
(2), the transmission line of electricity chosen in step (1) is had a power failure, three-phase hanging earthing conductor ground connection to described transmission line of electricity after power failure, use shorting stub will to treat that the head end of ice-melt snow melt ground wire is connected with the A phase conductor in section, will treat that the end of ice-melt snow melt ground wire is connected with the B phase conductor in section；
(3), being connected by positive pole and step (2) the described A phase conductor of DC ice melting device for melting snow, the negative pole of DC ice melting device for melting snow is connected with step (2) described B phase conductor；
(4), all earth leads of taking off in step (2), start DC ice melting device for melting snow, the icing snow melt ground wire in section carried out ice-melt snow melt；
(5), after the icing snow melt on ground wire in section completely falls off, disconnecting and remove DC ice melting device for melting snow, use insulating bar to take off all shorting stubs, ground wire deicing snow melt completes.
Preferably, also comprise the steps:
(0), by the required transmission line of electricity segmentation carrying out ice-melt snow melt, the ground wire between each segmentation installs varistor additional, it is simple to carry out the segmentation ice-melt snow melt of ground wire.
Preferably, the varistor described in step (1) is zinc oxide valve plate.
Preferably, the through-current capability of the varistor described in step (1) determines according to the overcurrent multiple of circuit, for ensureing the through-current capability lightning current more than ice-melt snow melt area maximum possible of varistor.
Preferably, the residual voltage value of the varistor described in step (1) determines according to the maximum output voltage of DC ice melting device for melting snow, for ensureing residual voltage value is DC ice melting device for melting snow maximum output voltage the 150%～250% of varistor.
This DC ice melting snow-smelting method that the present invention provides, by target ice-melt snow melt circuit is carried out semi-insulating transformation, with the insulation of steel tower when keeping ground wire deicing snow melt, efficiently avoid icing serious time insulation be bridged and cannot implement ice-melt, guarantee that ground wire deicing is reliably carried out, keep ground wire to prevent the function of overvoltage simultaneously；In addition, the semi-insulating transformation that ground wire is carried out by the present invention, deicing processes only needs transform once and be made without other any operations, and worked in ice-melt and need not afterwards remove described semi-insulating transformation, convenient ice-melt operation next time, cost the most of the present invention is extremely low, considerably reduces workload during ice-melt, improves ice-melt efficiency.
Detailed description of the invention
By particular specific embodiment, embodiments of the present invention being described below, those skilled in the art can be understood other advantages and effect of the present invention easily by the content disclosed by this specification.
The ice-melt snow-smelting method of a kind of transmission line of electricity, comprises the steps:
(1), choose and easily occur icing disaster to need the transmission line of electricity section of ice-melt snow melt, semi-insulating transformation is carried out: according to line ice coating situation to choosing section place ground portion, determine ice-melt snow melt distance, the resistance in selected ice-melt loop is calculated according to ice-melt distance, one group of varistor is installed between every grade of shaft tower and ground wire additional in section, this section ground wire installs one group of varistor additional with other section ground wire and is connected, the through-current capability of varistor determines according to the overcurrent multiple of circuit, the residual voltage value of varistor determines according to the maximum output voltage of DC ice melting device for melting snow；
(2), the transmission line of electricity chosen in step (1) is had a power failure, three-phase hanging earthing conductor ground connection to described transmission line of electricity after power failure, use shorting stub will to treat that the head end of ice-melt snow melt ground wire is connected with the A phase conductor in section, will treat that the end of ice-melt snow melt ground wire is connected with the B phase conductor in section；
(3), being connected by positive pole and step (2) the described A phase conductor of DC ice melting device for melting snow, the negative pole of DC ice melting device for melting snow is connected with step (2) described B phase conductor；
(4), all earth leads of taking off in step (2), start DC ice melting device for melting snow, the icing snow melt ground wire in section carried out ice-melt snow melt；
(5), after the icing snow melt on ground wire in section completely falls off, disconnecting and remove DC ice melting device for melting snow, use insulating bar to take off all shorting stubs, ground wire deicing snow melt completes.
Preferably, also comprise the steps:
(0), by the required transmission line of electricity segmentation carrying out ice-melt snow melt, the ground wire between each segmentation installs varistor additional, it is simple to carry out the segmentation ice-melt snow melt of ground wire.
Preferably, the varistor described in step (1) is zinc oxide valve plate.
Preferably, the through-current capability of the varistor described in step (1) determines according to the overcurrent multiple of circuit, for ensureing the through-current capability lightning current more than ice-melt snow melt area maximum possible of varistor.
Preferably, the residual voltage value of the varistor described in step (1) determines according to the maximum output voltage of DC ice melting device for melting snow, for ensureing residual voltage value is DC ice melting device for melting snow maximum output voltage the 150%～250% of varistor.
The invention has the beneficial effects as follows:
(1) with the insulation of steel tower when can ensure that ground wire deicing, efficiently avoid icing serious time insulation be bridged and cannot implement ice-melt, it is ensured that ground wire deicing is reliably carried out, and keeps ground wire to prevent the function of overvoltage simultaneously；
(2) after the semi-insulating transformation of ground wire completes, each ice-melt is not required to carry out state of insulation switching, greatly reduces workload during ice-melt, improves ice-melt efficiency；
(3) ground wire for icing section carries out ice-melt, and section circuit is short, and line resistance is little, two ground line parallel ice-melts, significantly reduces ice-melt voltage and the power of ground wire deicing device, reduces deicing device and develops difficulty, improves the feasibility of ground wire deicing；
(4) taking two wires as ice-melt passage, selectively icing section is implemented ice-melt, conductor resistance is little, and ground wire DC de-icing device is positioned at centre simultaneously, and a set of deicing device can cover the ice-melt of whole piece earth wire of power transmission line, and economy is high.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by any person skilled in the art.Therefore, art has all equivalence modification or changes that usually intellectual is completed under without departing from disclosed spirit and technological thought such as, must be contained by the claim of the present invention.
Claims (5)
1. an ice-melt snow-smelting method for transmission line of electricity, comprises the steps:
(1), choose and easily occur icing disaster to need the transmission line of electricity section of ice-melt snow melt, semi-insulating transformation is carried out: according to line ice coating situation to choosing section place ground portion, determine ice-melt snow melt distance, the resistance in selected ice-melt loop is calculated according to ice-melt distance, one group of varistor is installed between every grade of shaft tower and ground wire additional in section, this section ground wire installs one group of varistor additional with other section ground wire and is connected, the through-current capability of varistor determines according to the overcurrent multiple of circuit, the residual voltage value of varistor determines according to the maximum output voltage of DC ice melting device for melting snow；
(2), the transmission line of electricity chosen in step (1) is had a power failure, three-phase hanging earthing conductor ground connection to described transmission line of electricity after power failure, use shorting stub will to treat that the head end of ice-melt snow melt ground wire is connected with the A phase conductor in section, will treat that the end of ice-melt snow melt ground wire is connected with the B phase conductor in section；
(3), being connected by positive pole and step (2) the described A phase conductor of DC ice melting device for melting snow, the negative pole of DC ice melting device for melting snow is connected with step (2) described B phase conductor；
(4), all earth leads of taking off in step (2), start DC ice melting device for melting snow, the icing snow melt ground wire in section carried out ice-melt snow melt；
(5), after the icing snow melt on ground wire in section completely falls off, disconnecting and remove DC ice melting device for melting snow, use insulating bar to take off all shorting stubs, ground wire deicing snow melt completes.
The ice-melt snow-smelting method of a kind of transmission line of electricity the most according to claim 1, it is characterised in that also comprise the steps:
(0), by the required transmission line of electricity segmentation carrying out ice-melt snow melt, the ground wire between each segmentation installs varistor additional, it is simple to carry out the segmentation ice-melt snow melt of ground wire.
The ice-melt snow-smelting method of transmission line of electricity the most according to claim 1 and 2, it is characterised in that the varistor described in step (1) is zinc oxide valve plate.
The ice-melt snow-smelting method of transmission line of electricity the most according to claim 1 and 2, it is characterized in that the through-current capability of the varistor described in step (1) determines according to the overcurrent multiple of circuit, for ensureing the through-current capability lightning current more than ice-melt snow melt area maximum possible of varistor.
The ice-melt snow-smelting method of transmission line of electricity the most according to claim 1 and 2, it is characterized in that the residual voltage value of the varistor described in step (1) determines according to the maximum output voltage of DC ice melting device for melting snow, for ensureing residual voltage value is DC ice melting device for melting snow maximum output voltage the 150%～250% of varistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610287396.1A CN105826860A (en) | 2016-05-04 | 2016-05-04 | Method for melting ice and snow of transmission line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610287396.1A CN105826860A (en) | 2016-05-04 | 2016-05-04 | Method for melting ice and snow of transmission line |
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| CN105826860A true CN105826860A (en) | 2016-08-03 |
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| CN201610287396.1A Pending CN105826860A (en) | 2016-05-04 | 2016-05-04 | Method for melting ice and snow of transmission line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174829A (en) * | 2018-07-23 | 2019-01-11 | 中国电力科学研究院有限公司 | The long-range snow-removing method of extra-high voltage equipment based on hot wind snow-removing device |
| CN110854738A (en) * | 2019-11-29 | 2020-02-28 | 国网湖南省电力有限公司 | Segmented ice melting method for high-voltage transmission line |
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| CN101783493A (en) * | 2009-10-21 | 2010-07-21 | 湖南省电力公司调度通信局 | On-line decision making method for load current de-icing of transmission line |
| CN201956640U (en) * | 2010-10-27 | 2011-08-31 | 于遵义 | Special logic control power module for snow melt |
| CN102611061A (en) * | 2012-03-13 | 2012-07-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Single-pole ground loop type direct-current deicing method for overhead ground wire and OPGW (optical fiber composite overhead ground wire) |
| CN102611062A (en) * | 2012-03-13 | 2012-07-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for determining parameters of transmission line overhead ground wire direct-current ice-melting device |
| CN104901254A (en) * | 2015-06-10 | 2015-09-09 | 广西电网有限责任公司电力科学研究院 | Portable DC ice melting power supply device for distribution line |
| CN105529667A (en) * | 2016-02-23 | 2016-04-27 | 徐光武 | DC ice melting system and DC ice melting method for UHV ground wires |
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2016
- 2016-05-04 CN CN201610287396.1A patent/CN105826860A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783493A (en) * | 2009-10-21 | 2010-07-21 | 湖南省电力公司调度通信局 | On-line decision making method for load current de-icing of transmission line |
| CN201956640U (en) * | 2010-10-27 | 2011-08-31 | 于遵义 | Special logic control power module for snow melt |
| CN102611061A (en) * | 2012-03-13 | 2012-07-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Single-pole ground loop type direct-current deicing method for overhead ground wire and OPGW (optical fiber composite overhead ground wire) |
| CN102611062A (en) * | 2012-03-13 | 2012-07-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for determining parameters of transmission line overhead ground wire direct-current ice-melting device |
| CN104901254A (en) * | 2015-06-10 | 2015-09-09 | 广西电网有限责任公司电力科学研究院 | Portable DC ice melting power supply device for distribution line |
| CN105529667A (en) * | 2016-02-23 | 2016-04-27 | 徐光武 | DC ice melting system and DC ice melting method for UHV ground wires |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109174829A (en) * | 2018-07-23 | 2019-01-11 | 中国电力科学研究院有限公司 | The long-range snow-removing method of extra-high voltage equipment based on hot wind snow-removing device |
| CN109174829B (en) * | 2018-07-23 | 2021-08-24 | 中国电力科学研究院有限公司 | Extra-high voltage equipment remote snow removing method based on hot air snow removing device |
| CN110854738A (en) * | 2019-11-29 | 2020-02-28 | 国网湖南省电力有限公司 | Segmented ice melting method for high-voltage transmission line |
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Application publication date: 20160803 |