CN101262124B - An ice removing method and device for high-voltage power transmission line - Google Patents
An ice removing method and device for high-voltage power transmission line Download PDFInfo
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- CN101262124B CN101262124B CN2008100471818A CN200810047181A CN101262124B CN 101262124 B CN101262124 B CN 101262124B CN 2008100471818 A CN2008100471818 A CN 2008100471818A CN 200810047181 A CN200810047181 A CN 200810047181A CN 101262124 B CN101262124 B CN 101262124B
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Abstract
本发明提供了一种高压输电线路除冰方法，将两杆塔间的三相三线制高压输电线的任意两输电线之间构成电回路，在回路中通入高频电流，使得高压输电线表面产生集肤效应，输电线发热实现除冰。本发明还提供了实现该方法的装置，第一高频高压电容与变压器原方绕组串接后，再与第二高压高频电容并联在两高压输电线之间，变压器付方绕组与电力电子装置输出端并联。本发明在不影响高压输电线路正常运行的条件下能够快速有效安全进行除冰，结构简单，实现方便，可主要应用于我国电网，特别是南方电网高压输电线路在冰雪环境下的除冰需要。
The invention provides a method for deicing a high-voltage transmission line. An electrical loop is formed between any two transmission lines of a three-phase three-wire high-voltage transmission line between two towers, and a high-frequency current is introduced into the loop to make the surface of the high-voltage transmission line The skin effect is generated, and the transmission line generates heat to achieve deicing. The invention also provides a device for realizing the method. After the first high-frequency high-voltage capacitor is connected in series with the primary winding of the transformer, it is connected in parallel with the second high-voltage high-frequency capacitor between two high-voltage transmission lines. The output terminals of the device are connected in parallel. The invention can quickly, effectively and safely deicing without affecting the normal operation of the high-voltage transmission line, has a simple structure and is convenient to implement, and can be mainly applied to my country's power grid, especially the deicing needs of the high-voltage transmission line of the Southern Power Grid under the ice and snow environment.
Description
Technical field
The present invention relates to the deicing technical field, particularly relate to the de-icing method and the device of ultra-high-tension power transmission line, can be mainly used in China's electrical network, particularly the deicing of south electric network ultra-high-tension power transmission line under the ice and snow environment needs.
Background technology
Occur in the southern ice and snow weather of China during the Spring Festival in 2008, cause the power supply major network of provinces such as Hunan, Jiangxi, Guizhou, Hubei, Guangxi, Zhejiang and Anhui partly or entirely to interrupt, the electrical network of part provinces and cities even withdraw from big electrical network independent operating.What current ice and snow weather caused has a power failure on a large scale, bring massive losses to national economy, its main cause is that each province's main high voltage transmission line can't carry the icing thickness above design standard, to such an extent as to transmission line weight heightens, finally forgets about it high-voltage power transmission tower and forms power failure.Simultaneously, ultra-high-tension power transmission line mostly is in the abominable field of geographical environment, and rescue is difficult to launch, and restorative job schedule is slow.
Traditional deicing mode is to begin to freeze at transmission line to reach a certain thickness, and before shaft tower did not collapse as yet, artificial making needed to start deicer in transformer station after the temporary transient power failure of transmission line of deicing.The essence of deicer is exactly a step-down transformer that capacity is bigger, the high pressure winding of step-down transformer inserts a certain circuit of operate as normal in the transformer station, its low pressure winding with need the power transmission line of deicing to join, make step-down transformer operate in short-circuit condition, in needing the transmission line of deicing, produce big electric current, rely on big electric current on transmission line, to generate heat and come deicing.Though this method is feasible, but a greatest problem that exists is exactly to need the transmission line of deicing to cut off the power supply, and this can never consider under the situation of last resort, and needed in addition step-down transformer capacity is big, therefore its volume, weight are bigger, less economical.
Summary of the invention
The purpose of this invention is to provide a kind of deicing high-voltage power transmission line method, under the situation that transmission line does not cut off the power supply, quickly and safely the electrical network ultra-high-tension power transmission line is carried out deicing.
Another object of the present invention provides a kind of deicer of realizing said method, quickly and safely the electrical network ultra-high-tension power transmission line is carried out deicing under the situation that transmission line does not cut off the power supply, and is simple in structure, easy to use.
A kind of deicing high-voltage power transmission line method with constituting electric loop between any two power transmission lines between two shaft towers, feeds high-frequency current in the loop, make the high voltage transmission line surface produce kelvin effect, and the power transmission line heating realizes deicing.
A kind of device of realizing above-mentioned deicing high-voltage power transmission line method, comprise the first high-frequency and high-voltage electric capacity, the second high-frequency and high-voltage electric capacity, transformer and power electronic equipment, the first high-frequency and high-voltage electric capacity is with after the former side's winding of transformer is connected in series, again and the second high voltagehigh frequency electric capacity be connected in parallel between the two high pressure power transmission lines, the transformer side of paying winding is in parallel with the power electronic equipment output.
The present invention makes up the electric loop between the high voltage transmission line route, in the loop, feed high-frequency current, because the influence of kelvin effect, most of high-frequency current will concentrate on the power transmission line surface, make transmission line heating, thus under the condition that does not influence the normal operation of ultra-high-tension power transmission line fast effective and safe carry out deicing.The current source that adopts in the deicer provided by the invention itself does not need very big capacity, and it is convenient to realize, can be directly power taking from the transmission line, help the abominable field work of geographical environment.
Description of drawings
Fig. 1 is a deicer structural representation of the present invention.
Embodiment
Deicer design principle of the present invention is that any two power transmission lines constitute the loop in the three-phase three-wire system high voltage transmission line of selecting between two shaft towers, feeds high-frequency current in the loop, produces kelvin effect and realizes deicing.Fig. 1 is a deicer structural representation of the present invention, high-frequency and high-voltage electric capacity C1 is with after the former side's winding of transformer T is connected in series, be connected in parallel between high voltage transmission line 3 (as A mutually) and the high voltage transmission line 4 (as the B phase) with high voltagehigh frequency capacitor C 2, the transformer T side of paying winding is in parallel with harmonic current injection device output again.Based on the harmonic current injection device of power electronics can be directly power taking from the transmission line, at first AC rectification is become direct current, form high-frequency ac square wave or sine wave by inversion afterwards, thereby provide the high-frequency harmonic electric current, the high-frequency harmonic electric current that it injected will be between the power transmission line route between shaft tower 1 and the shaft tower 2 loop flow, the power frequency that is injected is higher, because the influence of kelvin effect, most of high-frequency current will concentrate on the power transmission line surface, current density is bigger, thereby makes transmission line heating and realization deicing.Capacitor C 1 mainly plays the dividing potential drop effect, and 2 of capacitor C provide low impedance path for the high-frequency harmonic electric current that is injected.Shaft tower 1 and shaft tower 2 can be the adjacent stems tower, several shaft towers of also can being separated by.
Claims (1)
1. deicer for high-voltage power transmission line, it is characterized in that, comprise the first high-frequency and high-voltage electric capacity, the second high-frequency and high-voltage electric capacity, transformer and power electronic equipment, the first high-frequency and high-voltage electric capacity is with after the former side's winding of transformer is connected in series, again and the second high-frequency and high-voltage electric capacity be connected in parallel between the two high pressure power transmission lines, the transformer side of paying winding is in parallel with the power electronic equipment output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100471818A CN101262124B (en) | 2008-03-28 | 2008-03-28 | An ice removing method and device for high-voltage power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100471818A CN101262124B (en) | 2008-03-28 | 2008-03-28 | An ice removing method and device for high-voltage power transmission line |
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| Publication Number | Publication Date |
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| CN101262124A CN101262124A (en) | 2008-09-10 |
| CN101262124B true CN101262124B (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100471818A Active CN101262124B (en) | 2008-03-28 | 2008-03-28 | An ice removing method and device for high-voltage power transmission line |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195261A (en) * | 2011-05-31 | 2011-09-21 | 长沙理工大学 | 18kV and 40kHz high-frequency de-icing device and de-icing method thereof |
| CN102437542A (en) * | 2011-12-20 | 2012-05-02 | 中铁二院工程集团有限责任公司 | Alternating current ice melting system of electrified railway traction network |
| CN106129890B (en) * | 2016-06-23 | 2017-10-24 | 绍兴俪泰纺织科技有限公司 | A kind of mountain area high-voltage electric power circuit upkeep operation unmanned plane |
| CN108856168A (en) * | 2018-04-27 | 2018-11-23 | 国家电网公司 | A kind of overhead line structures deicer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1848575A (en) * | 2006-03-22 | 2006-10-18 | 国家电网公司 | Method for melting ice in UHVDC transmission system |
| CN200944519Y (en) * | 2006-08-29 | 2007-09-05 | 薛辉 | Automatic ice-melting device for transmission line |
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2008
- 2008-03-28 CN CN2008100471818A patent/CN101262124B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1848575A (en) * | 2006-03-22 | 2006-10-18 | 国家电网公司 | Method for melting ice in UHVDC transmission system |
| CN200944519Y (en) * | 2006-08-29 | 2007-09-05 | 薛辉 | Automatic ice-melting device for transmission line |
Non-Patent Citations (3)
| Title |
|---|
| CHARLWS R.SULLIVAN.etal.Breaking the ice:Deicing Power Transmission Lines with High-frequency,High-voltage Excitation.《IEEE Industry Application》.2003,第9卷(第5期),49-54. * |
| CHARLWSR.SULLIVAN.etal.Breakingtheice:DeicingPowerTransmissionLineswithHigh-frequency High-voltage Excitation.《IEEE Industry Application》.2003 |
| JP平11-332074A 1999.11.30 |
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| CN101262124A (en) | 2008-09-10 |
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