CN104716613B - De-icing method based on 500kV transmission line of electricity - Google Patents
De-icing method based on 500kV transmission line of electricity Download PDFInfo
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- CN104716613B CN104716613B CN201510161536.6A CN201510161536A CN104716613B CN 104716613 B CN104716613 B CN 104716613B CN 201510161536 A CN201510161536 A CN 201510161536A CN 104716613 B CN104716613 B CN 104716613B
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- Prior art keywords
- conductor
- quadripartion
- ice
- phase
- transmission line
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 51
- 230000005611 electricity Effects 0.000 title 1
- 239000004020 conductors Substances 0.000 claims abstract description 110
- 239000000155 melts Substances 0.000 claims abstract description 63
- 238000002844 melting Methods 0.000 claims abstract description 29
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000000875 corresponding Effects 0.000 claims description 5
- 239000003822 epoxy resins Substances 0.000 claims description 5
- 239000000463 materials Substances 0.000 claims description 5
- 229920000647 polyepoxides Polymers 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 206010027378 Mental retardation Diseases 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 201000006347 intellectual disability Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal materials Substances 0.000 description 1
Classifications
-
- 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 kind of de-icing method based on 500kV transmission line of electricity, comprise the steps: (1), record strain section and conductor spacer quantity, optimize conductor spacer and realize sub-conductor all insulation；(2), test platform is built；(3), carry out A phase conductor ice-melt test, the high-voltage output end of movable DC ice melting device and earth terminal are connected respectively one or two in A phase quadripartion sub-conductor；(4), call through test ring current carries out the ice-melt test of A phase quadripartion sub-conductor；(5) open test power supply, connects remaining one by the high-voltage output end of movable DC ice melting device, and earth terminal connects any two in another root remaining or step 3, repeats step 4, until A phase conductor icing melts away completely；(6) repeat step 3～5, carry out B phase conductor ice-melt test；(7), repeat step 3～5, carry out C phase conductor ice-melt test.The present invention can meet the demand of 500kV transmission line de-icing capacity.
Description
Technical field
The invention belongs to electrical engineering technical field, particularly relate to a kind of de-icing method based on 500kV transmission line of electricity.
Background technology
Along with the demand of electric power is sharply increased by modern society, grid power transmission adopts remote Large Copacity mode of movement, and it is 500kV trunk power transmission network that Hunan defines electric pressure, and the span between adjacent shaft tower is very big；On the other hand, China the end of the year in 2007 to 2008 at the beginning of, the wire breaking and tower falling accident that the southern many provinces and cities in the whole nation cause because of sleet and snow ice weather causes massive losses to people's lives and national wealth, the capacity of deicing device is had higher requirement by this, the increase of ice-melt capacity will necessarily make the weight and volume of deicing device increase, not only involving great expense, also not readily portable at the scene, the restriction by on-the-spot Special complex landform also have impact on its ability resisting ice damage to a certain extent.
The commonly used quadripartion sub-conductor of exchange 500kV transmission line of electricity of current China, quadripartion sub-conductor will install a quadripartion conductor spacer at interval of 40 ~ 100 meters, spacing for keeping four root wires is constant and suppresses vibration, quadripartion conductor spacer domestic at present is metal material manufacture, it is difficult to keep the insulation between four root wires in strain section.
Summary of the invention
It is an object of the invention to provide a kind of capacity that can reduce deicing device on the basis of quadripartion sub-conductor all insulation, three phase line is realized by phase ice-melt, realize miniaturization and the portable design of deicing device, make the de-icing method based on 500kV transmission line of electricity in the more flexible supertension line being applied to big span of deicing device.
This de-icing method based on 500kV transmission line of electricity provided by the invention, comprises the steps:
(1), the span quantity that records in the strain section quantity of the 500kV each phase conductor of quadripartion transmission line of electricity to be rebuilt, each strain section, and the quantity of quadripartion conductor spacer between quadripartion sub-conductor in each span.It is equipped with the quadripartion all insulation conductor spacer equal with the quantity of the quadripartion conductor spacer recorded, it is achieved the quadripartion sub-conductor all insulation of 500kV quadripartion transmission line of electricity；
(2), building test platform, this test platform has the quadripartion sub-conductor of pressure regulator, power transformer, movable DC ice melting device, wine glass-shaped steel tower and 500kV quadripartion transmission line of electricity；
(3) the A phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the loop of joint test platform, according to the requirement to movable DC ice melting device capacity, its high-voltage output end connects one or two in A phase quadripartion sub-conductor, and corresponding earth terminal connects one or two that A phase quadripartion sub-conductor is other；
(4), the ring current of call through test platform, slowly boosted evenly by pressure regulator, until power transformer output voltage reaches the rated voltage of movable DC ice melting device.Keep voltage constant.Carry out the ice-melt test of A phase quadripartion sub-conductor, record ambient temperature and ice-melt time；
(5), when in step 3A phase, existence does not carry out the quadripartion sub-conductor of ice-melt test, the ring current of open test platform, the high-voltage output end of movable DC ice melting device or earth terminal are connected in A phase quadripartion sub-conductor and does not carry out in ice-melt test, the earth terminal of its correspondence or high-voltage output end are connected A phase quadripartion sub-conductor and does not carry out another root in ice-melt test or carried out two of ice-melt test.Repeat step 4, until A phase conductor icing melts away completely, the ring current of open test platform；
(6), carry out 500kV quadripartion transmission line of electricity B phase conductor ice-melt test, change test platform circuit connection repeat step 3～5, until B phase conductor icing melts away completely, the ring current of open test platform；
(7) the C phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the circuit connection changing test platform repeats step 3～5, until C phase conductor icing melts away completely, the ring current of open test platform, complete 500kV quadripartion transmission line of electricity A, B, C three-phase ice-melt.
In described step 1, quadripartion all insulation conductor spacer adopts epoxy resin insulation material to make.
Compared with prior art, the invention have the advantages that
1, create conditions for 500kV supertension all insulation quadripartion sub-conductor DC ice melting；
2, the present invention can achieve the Miniaturization Design of movable DC ice melting device capacity and volume, is suitable for the alpine terrain of complexity；
3, reducing the capacity of movable DC ice melting device and can ensure the safety of test, in 500kV transmission system, the most mental retardation of ice melting current of holding of movable DC ice melting device is reduced to the 1/4 of legacy equipment；
4, method is simple, it is not necessary to circuit is transformed on a large scale；
5, the present invention is suitable for being generalized to the DC ice melting of extra-high voltage many oidiospores wire.
Detailed description of the invention
Embodiment 1 liang of root wire ice-melt simultaneously:
This de-icing method based on 500kV transmission line of electricity of the present invention, comprises the steps:
(1), the span quantity that records in the strain section quantity of the 500kV each phase conductor of quadripartion transmission line of electricity to be rebuilt, each strain section, and the quantity of quadripartion conductor spacer between quadripartion sub-conductor in each span.It is equipped with the quadripartion all insulation conductor spacer equal with the quantity of the quadripartion conductor spacer recorded, it is achieved the quadripartion sub-conductor all insulation of 500kV quadripartion transmission line of electricity；
(2), building test platform, this test platform has the quadripartion sub-conductor of pressure regulator, power transformer, movable DC ice melting device, wine glass-shaped steel tower and 500kV quadripartion transmission line of electricity；
(3) the A phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the loop of joint test platform, according to the requirement to movable DC ice melting device capacity, its high-voltage output end connects the 1st root wire in A phase quadripartion sub-conductor, and corresponding earth terminal connects the 2nd root wire of A phase quadripartion sub-conductor；
(4), the ring current of call through test platform, slowly boosted evenly by pressure regulator, until power transformer output voltage reaches the rated voltage of movable DC ice melting device.Keep voltage constant.Carry out the ice-melt test of A phase quadripartion sub-conductor, record ambient temperature and ice-melt time；
(5), the ring current of open test platform, the high-voltage output end of movable DC ice melting device or earth terminal are connected the 3rd root wire of A phase quadripartion sub-conductor, the earth terminal of its correspondence or high-voltage output end are connected the 4th root wire of A phase quadripartion sub-conductor.Repeat step 4, until A phase conductor icing melts away completely, the ring current of open test platform；
(6), carry out 500kV quadripartion transmission line of electricity B phase conductor ice-melt test, change test platform circuit connection repeat step 3～5, until B phase conductor icing melts away completely, the ring current of open test platform；
(7) the C phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the circuit connection changing test platform repeats step 3～5, until C phase conductor icing melts away completely, the ring current of open test platform, complete 500kV quadripartion transmission line of electricity A, B, C three-phase ice-melt.
Quadripartion all insulation conductor spacer in step 1 of the present invention adopts epoxy resin insulation material to make.
The ice-melt simultaneously of embodiment 2 three root wire:
This de-icing method based on 500kV transmission line of electricity of the present invention, comprises the steps:
(1), the span quantity that records in the strain section quantity of the 500kV each phase conductor of quadripartion transmission line of electricity to be rebuilt, each strain section, and the quantity of quadripartion conductor spacer between quadripartion sub-conductor in each span.It is equipped with the quadripartion all insulation conductor spacer equal with the quantity of the quadripartion conductor spacer recorded, it is achieved the quadripartion sub-conductor all insulation of 500kV quadripartion transmission line of electricity；
(2), building test platform, this test platform has the quadripartion sub-conductor of pressure regulator, power transformer, movable DC ice melting device, wine glass-shaped steel tower and 500kV quadripartion transmission line of electricity；
(3) the A phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the loop of joint test platform, according to the requirement to movable DC ice melting device capacity, its high-voltage output end connects the 1st and the 2nd root wire in A phase quadripartion sub-conductor, and corresponding earth terminal connects the 3rd root wire of A phase quadripartion sub-conductor；
(4), the ring current of call through test platform, slowly boosted evenly by pressure regulator, until power transformer output voltage reaches the rated voltage of movable DC ice melting device.Keep voltage constant.Carry out the ice-melt test of A phase quadripartion sub-conductor, record ambient temperature and ice-melt time；
(5), the ring current of open test platform, the high-voltage output end of movable DC ice melting device or earth terminal are connected the 4th root wire of A phase quadripartion sub-conductor, the earth terminal of its correspondence or high-voltage output end are connected the 1st and the 2nd root wire of A phase quadripartion sub-conductor.Repeat step 4, until A phase conductor icing melts away completely, the ring current of open test platform；
(6), carry out 500kV quadripartion transmission line of electricity B phase conductor ice-melt test, change test platform circuit connection repeat step 3～5, until B phase conductor icing melts away completely, the ring current of open test platform；
(7) the C phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the circuit connection changing test platform repeats step 3～5, until C phase conductor icing melts away completely, the ring current of open test platform, complete 500kV quadripartion transmission line of electricity A, B, C three-phase ice-melt.
Quadripartion all insulation conductor spacer in step 1 of the present invention adopts epoxy resin insulation material to make.
The ice-melt simultaneously of embodiment 3 four root wire:
This de-icing method based on 500kV transmission line of electricity of the present invention, comprises the steps:
(1), the span quantity that records in the strain section quantity of the 500kV each phase conductor of quadripartion transmission line of electricity to be rebuilt, each strain section, and the quantity of quadripartion conductor spacer between quadripartion sub-conductor in each span.It is equipped with the quadripartion all insulation conductor spacer equal with the quantity of the quadripartion conductor spacer recorded, it is achieved the quadripartion sub-conductor all insulation of 500kV quadripartion transmission line of electricity；
(2), building test platform, this test platform has the quadripartion sub-conductor of pressure regulator, power transformer, movable DC ice melting device, wine glass-shaped steel tower and 500kV quadripartion transmission line of electricity；
(3) the A phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the loop of joint test platform, according to the requirement to movable DC ice melting device capacity, its high-voltage output end connects the 1st and the 2nd root wire in A phase quadripartion sub-conductor, and corresponding earth terminal connects the 3rd and the 4th root wire of A phase quadripartion sub-conductor；
(4), the ring current of call through test platform, slowly boosted evenly by pressure regulator, until power transformer output voltage reaches the rated voltage of movable DC ice melting device.Keep voltage constant.Carry out the ice-melt test of A phase quadripartion sub-conductor, record ambient temperature and ice-melt time, until A phase conductor icing melts away completely, the ring current of open test platform；
(5), carry out 500kV quadripartion transmission line of electricity B phase conductor ice-melt test, change test platform circuit connection repeat step 3～5, until B phase conductor icing melts away completely, the ring current of open test platform；
(6) the C phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the circuit connection changing test platform repeats step 3～5, until C phase conductor icing melts away completely, the ring current of open test platform, complete 500kV quadripartion transmission line of electricity A, B, C three-phase ice-melt.
Quadripartion all insulation conductor spacer in step 1 of the present invention adopts epoxy resin insulation material to make.
Through long-term test record, ice melting current all can be reduced to by above-described embodiment the 1/4 of conventional apparatus ice melting current.
Claims (2)
1., based on a de-icing method for 500kV transmission line of electricity, comprise the steps:
(1), the span quantity that records in the strain section quantity of the 500kV each phase conductor of quadripartion transmission line of electricity to be rebuilt, each strain section, and the quantity of quadripartion conductor spacer between quadripartion sub-conductor in each span；
It is equipped with the quadripartion all insulation conductor spacer equal with the quantity of the quadripartion conductor spacer recorded, it is achieved the quadripartion sub-conductor all insulation of 500kV quadripartion transmission line of electricity；
(2), building test platform, this test platform has the quadripartion sub-conductor of pressure regulator, power transformer, movable DC ice melting device, wine glass-shaped steel tower and 500kV quadripartion transmission line of electricity；
(3) the A phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the loop of joint test platform, according to the requirement to movable DC ice melting device capacity, its high-voltage output end connects one or two in A phase quadripartion sub-conductor, and corresponding earth terminal connects one or two that A phase quadripartion sub-conductor is other；
(4), the ring current of call through test platform, slowly boosted evenly by pressure regulator, until power transformer output voltage reaches the rated voltage of movable DC ice melting device, keep voltage constant, carry out the ice-melt test of A phase quadripartion sub-conductor, record ambient temperature and ice-melt time；
(5), when in step 3A phase, existence does not carry out the quadripartion sub-conductor of ice-melt test, the ring current of open test platform, the high-voltage output end of movable DC ice melting device or earth terminal are connected in A phase quadripartion sub-conductor and does not carry out in ice-melt test, the earth terminal of its correspondence or high-voltage output end are connected A phase quadripartion sub-conductor do not carry out another root in ice-melt test or carried out two of ice-melt test, repeat step 4, until A phase conductor icing melts away completely, the ring current of open test platform；
(6), carry out 500kV quadripartion transmission line of electricity B phase conductor ice-melt test, change test platform circuit connection repeat step 3～5, until B phase conductor icing melts away completely, the ring current of open test platform；
(7) the C phase conductor ice-melt test of 500kV quadripartion transmission line of electricity, is carried out, the circuit connection changing test platform repeats step 3～5, until C phase conductor icing melts away completely, the ring current of open test platform, complete 500kV quadripartion transmission line of electricity A, B, C three-phase ice-melt.
2. the de-icing method based on 500kV transmission line of electricity according to claim 1, it is characterised in that: in described step 1, quadripartion all insulation conductor spacer adopts epoxy resin insulation material to make.
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| CN201510161536.6A CN104716613B (en) | 2015-04-07 | 2015-04-07 | De-icing method based on 500kV transmission line of electricity |
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| CN105572029B (en) * | 2016-03-25 | 2018-02-02 | 中国南方电网有限责任公司超高压输电公司贵阳局 | The method that ground wire produces white crystals corrosion when simulating 500kV earth wire of power transmission line ice-melts |
| CN109103806B (en) * | 2018-08-24 | 2020-01-24 | 四川大学 | Online anti-icing control method for self-melting ice wire embedded with insulating material |
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| CN101409438B (en) * | 2008-07-25 | 2011-10-05 | 中国电力工程顾问集团西北电力设计院 | Ice-melting method suitable for transmission line with multiple fission conductor |
| CN101710683B (en) * | 2009-12-25 | 2012-10-03 | 重庆大学 | Intelligent circulation anti-icing method for transmitting current by split lead |
| CN103390874A (en) * | 2013-07-24 | 2013-11-13 | 国家电网公司 | Deicing method for deicing optical fiber composite overhead ground wire wound by insulated wires |
| CN104332928B (en) * | 2014-11-20 | 2016-08-24 | 国家电网公司 | Split conductor economic current anti-icing and deicing method |
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