CN105262001A - Ice melting method for overhead ground wire of power transmission line - Google Patents
Ice melting method for overhead ground wire of power transmission line Download PDFInfo
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- CN105262001A CN105262001A CN201510820554.0A CN201510820554A CN105262001A CN 105262001 A CN105262001 A CN 105262001A CN 201510820554 A CN201510820554 A CN 201510820554A CN 105262001 A CN105262001 A CN 105262001A
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- ground wire
- overhead ground
- ice
- icing
- transmission line
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Abstract
The invention provides an ice melting method for an overhead ground wire of a power transmission line. The ice melting method comprises the following steps: dismantling a down conductor of a tower of an ice-coated segment; connecting the overhead ground wire of the ice-coated segment and a transmission conductor in a short circuit; and providing ice-melting current to the overhead ground wire through the transmission conductor. According to the ice melting method for the overhead ground wire of the power transmission line provided by the invention, the overhead ground wire of the ice-coated segment and the transmission conductor are connected in the short circuit; the ice-melting current is introduced into the overhead ground wire through the transmission conductor; and joule heat is generated on the overhead ground wire, so that the ice melting target is achieved; a lot of human cost is saved; and a lightning protection function of the overhead ground wire is not affected.
Description
Technical field
The present invention relates to electrical engineering technical field, particularly a kind of de-icing method of power transmission line overhead ground wire.
Background technology
In recent years, the safe operation of accident to electrical network that powerline ice-covering causes causes serious threat.China is one of country that powerline ice-covering situation is serious, and at the beginning of 2008, south China is on a large scale in ice disaster, and national direct economic loss has exceeded 1,000 hundred million yuan.The electric current of the current ratio transmission pressure of power transmission line overhead ground wire is much smaller, thus easier icing.Overhead ground wire sag after icing becomes large, the sag requirement of transmission line to its overhead ground wire can not be met, be easy to when wind is waved flashover occurs between the transmission pressure of transmission line and overhead ground wire, transmission line tripped, and may transmission line be damaged.Further, if shaft tower two ends span does not wait or shaft tower is in mountain area, overhead ground wire ice coverage makes shaft tower be subject to force unbalance, easily produces shaft tower head and is bent, is out of shape the danger even fractureed, and also may occur that shaft tower tilts or collapses time serious.
Typical ultra-high-tension power transmission line comprises two ground wires: one is the Optical Fiber composite overhead Ground Wire (OPGW, OpticalPowerGroundWire) by base ground connection, and another root is the common ground wire of graded insulation single-point grounding.Overhead ground wire, due to its grounding characteristics, is difficult to implement Direct Current de-icing technology.In order to realize overhead ground wire ice-melt in prior art, insulating transformation is implemented to overhead ground wire in some area, namely between overhead ground wire and shaft tower, installs insulator additional, makes to insulate between overhead ground wire and shaft tower.But carrying out insulating to overhead ground wire, to transform not only cost high, and can affect overhead ground wire lightning protection properties.
Summary of the invention
To be solved by this invention is the problem that the de-icing method cost of existing overhead ground wire is high, affect overhead ground wire lightning protection properties.
For solving the problem, the invention provides a kind of de-icing method of power transmission line overhead ground wire, comprising: the down conductor removing icing section shaft tower; Short circuit icing section overhead ground wire and transmission pressure; Ice melting current is provided to overhead ground wire by transmission pressure.Ice melting current, by short circuit icing section overhead ground wire and transmission pressure, is caused overhead ground wire by transmission pressure, overhead ground wire produces the object that Joule heat reaches ice-melt by the present invention.Owing to not needing to carry out insulating transformation to overhead ground wire before ice-melt, only need remove the down conductor of icing section shaft tower, compared with transforming the method for overhead ground wire with all fronts insulating generally adopted at present, de-icing method provided by the invention not only saves a large amount of human cost, and can not affect overhead ground wire lightning protection function.Further, owing to only having removed the down conductor of icing section shaft tower, the down conductor of non-icing section shaft tower is retained, the heating of non-icing section overhead ground wire can have been reduced, thus reduced the consume to overhead ground wire generation completely.
Optionally, described short circuit icing section overhead ground wire comprises with transmission pressure: adopt shorting stub to be connected mid point and the transmission pressure of icing section overhead ground wire.In mid point short circuit overhead ground wire and the transmission pressure ice-melt on the spot of icing section overhead ground wire, compare existing all fronts indifference ice-melting mode and effectively improve ice-melt efficiency, shorten ice-melt power supply capacity demand and ice-melt time.
Optionally, described ice melting current is provided by the switch cubicle in transformer station.Comparing existing DC ice melting mode, without the need to separately establishing supply unit, having saved resource.
Optionally, described switch cubicle is 10kV switch cubicle or 35kV switch cubicle.
Optionally, the de-icing method of described power transmission line overhead ground wire also comprises: stop providing described ice melting current after ice-melt terminates, disconnect the connection between icing section overhead ground wire and transmission pressure, recover the down conductor of icing section shaft tower.After ice-melt terminates, the earth connection downlead of icing section shaft tower is recovered, can ensure that transmission line normally runs.
Compared with prior art, the present invention has the following advantages:
The de-icing method of power transmission line overhead ground wire provided by the invention, insulating transformation need not be carried out to overhead ground wire before ice-melt, only need remove the down conductor of icing section shaft tower, compared with transforming the method for overhead ground wire with all fronts insulating generally adopted at present, not only save a large amount of human cost, and overhead ground wire lightning protection function can not be affected.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the de-icing method of the power transmission line overhead ground wire of embodiment of the present invention;
The structural representation of the transmission line of Fig. 2 when to be the embodiment of the present invention carry out ice-melt to overhead ground wire.
Embodiment
Fig. 1 is the schematic flow sheet of the de-icing method of the power transmission line overhead ground wire of embodiment of the present invention, and the de-icing method of described power transmission line overhead ground wire comprises:
Step S11, removes the down conductor of icing section shaft tower;
Step S12, short circuit icing section overhead ground wire and transmission pressure;
Step S13, provides ice melting current by transmission pressure to overhead ground wire.
Ice melting current, by short circuit icing section overhead ground wire and transmission pressure, is caused overhead ground wire by transmission pressure, overhead ground wire produces the object that Joule heat reaches ice-melt by embodiment of the present invention.Owing to not needing to carry out insulating transformation to overhead ground wire before ice-melt, only need remove the down conductor of icing section shaft tower, compared with transforming the method for overhead ground wire with all fronts insulating generally adopted at present, de-icing method provided by the invention not only saves a large amount of human cost, and can not affect overhead ground wire lightning protection function.
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.Fig. 2 is the structural representation of common transmission line, and described transmission line comprises overhead ground wire 21, transmission pressure 22, shaft tower 231, shaft tower 232, shaft tower 233 and shaft tower 234, and each shaft tower is all by down conductor 24 ground connection.In the present embodiment, be described for the overhead ground wire ice coverage between shaft tower 232 and shaft tower 234.
As described in step S11, remove the down conductor of icing section shaft tower.In the present embodiment, the overhead ground wire ice coverage between shaft tower 232 and shaft tower 234, thus icing section shaft tower is shaft tower 233.Remove the down conductor that shaft tower 233 connects, shaft tower 233 and earth mat are disconnected, thus increases the earth resistance of shaft tower 233, reduce its diverting coefficient with icing section overhead ground wire, prevent the ice melting current of icing section overhead ground wire by shaft tower 233 inflow.
As described in step S12, short circuit icing section overhead ground wire and transmission pressure.Particularly, shorting stub can be adopted to connect any point and transmission pressure on icing section overhead ground wire.In order to reduce ice-melt power supply capacity demand, shorten the ice-melt time, in the present embodiment, shorting stub 25 is adopted to connect mid point and the transmission pressure of icing section overhead ground wire.
As described in step S13, provide ice melting current by transmission pressure to overhead ground wire.In the present embodiment, ice melting current I0 is provided by the switch cubicle 26 in transformer station.Particularly, be connected by the current output terminal of described switch cubicle 26 with described transmission pressure 22, the mains switch of the described switch cubicle 26 that closes, described ice melting current I0 flows to icing section transmission pressure by non-icing section transmission pressure.After arriving icing section transmission pressure, described ice melting current I0 flows to icing section overhead ground wire by described shorting stub 25, and described ice melting current I0 splits into electric current I 1 and electric current I 2, and the icing of icing section overhead ground wire melts under the effect of electric current Joule heat.Further, electric current I 1 splits into electric current I 11 and electric current I 12, and electric current I 2 splits into electric current I 21 and electric current I 22, and described switch cubicle 26 can be 10kV switch cubicle or 35kV switch cubicle.
After ice-melt terminates, disconnect the mains switch of described switch cubicle 26, stop providing described ice melting current I0.Further, disconnect the connection between icing section overhead ground wire and transmission pressure, namely remove described shorting stub 25, recover the down conductor of icing section shaft tower 233.
The above is only preferred embodiment of the present invention, and not do any pro forma restriction to the present invention, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present invention, all falls within protection scope of the present invention.
Claims (5)
1. a de-icing method for power transmission line overhead ground wire, is characterized in that, comprising:
Remove the down conductor of icing section shaft tower;
Short circuit icing section overhead ground wire and transmission pressure;
Ice melting current is provided to overhead ground wire by transmission pressure.
2. the de-icing method of power transmission line overhead ground wire according to claim 1, is characterized in that, described short circuit icing section overhead ground wire and transmission pressure comprise:
Shorting stub is adopted to connect mid point and the transmission pressure of icing section overhead ground wire.
3. the de-icing method of power transmission line overhead ground wire according to claim 1, is characterized in that, described ice melting current is provided by the switch cubicle in transformer station.
4. the de-icing method of power transmission line overhead ground wire according to claim 3, is characterized in that, described switch cubicle is 10kV switch cubicle or 35kV switch cubicle.
5. the de-icing method of the power transmission line overhead ground wire according to any one of Claims 1-4, is characterized in that, also comprises:
Stop providing described ice melting current after ice-melt terminates, disconnect the connection between icing section overhead ground wire and transmission pressure, recover the down conductor of icing section shaft tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510820554.0A CN105262001A (en) | 2015-11-24 | 2015-11-24 | Ice melting method for overhead ground wire of power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510820554.0A CN105262001A (en) | 2015-11-24 | 2015-11-24 | Ice melting method for overhead ground wire of power transmission line |
Publications (1)
| Publication Number | Publication Date |
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| CN105262001A true CN105262001A (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510820554.0A Pending CN105262001A (en) | 2015-11-24 | 2015-11-24 | Ice melting method for overhead ground wire of power transmission line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025919A (en) * | 2016-06-28 | 2016-10-12 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Flexible ground wire ice melting wiring apparatus |
| CN107516846A (en) * | 2017-08-30 | 2017-12-26 | 国网湖南省电力公司 | New de-icing method for agriculture distribution |
| CN111463736A (en) * | 2020-05-08 | 2020-07-28 | 国网湖北省电力有限公司 | Direct ground wire grounding ice melting method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993023779A1 (en) * | 1992-05-09 | 1993-11-25 | Bicc Public Limited Company | Overhead optical transmission system |
| 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 |
| 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) |
| CN102780193A (en) * | 2012-07-06 | 2012-11-14 | 广东电网公司电力科学研究院 | Current ice-melting method for overhead ground wires of electric transmission line |
| CN202712800U (en) * | 2012-09-06 | 2013-01-30 | 清远电力设计有限公司 | Adjustable tuned filter direct-current ice-melting device |
| 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 |
| CN104332929A (en) * | 2014-11-26 | 2015-02-04 | 国家电网公司 | Single-ground wire ice melting method |
-
2015
- 2015-11-24 CN CN201510820554.0A patent/CN105262001A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993023779A1 (en) * | 1992-05-09 | 1993-11-25 | Bicc Public Limited Company | Overhead optical transmission system |
| 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 |
| 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) |
| CN102780193A (en) * | 2012-07-06 | 2012-11-14 | 广东电网公司电力科学研究院 | Current ice-melting method for overhead ground wires of electric transmission line |
| CN202712800U (en) * | 2012-09-06 | 2013-01-30 | 清远电力设计有限公司 | Adjustable tuned filter direct-current ice-melting device |
| 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 |
| CN104332929A (en) * | 2014-11-26 | 2015-02-04 | 国家电网公司 | Single-ground wire ice melting method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025919A (en) * | 2016-06-28 | 2016-10-12 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Flexible ground wire ice melting wiring apparatus |
| CN106025919B (en) * | 2016-06-28 | 2017-11-24 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Flexible ground wire deicing termination |
| CN107516846A (en) * | 2017-08-30 | 2017-12-26 | 国网湖南省电力公司 | New de-icing method for agriculture distribution |
| CN111463736A (en) * | 2020-05-08 | 2020-07-28 | 国网湖北省电力有限公司 | Direct ground wire grounding ice melting method |
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Application publication date: 20160120 |