CN103107503A - Self-circulation de-icing method for de-icing composite overhead ground wire - Google Patents
Self-circulation de-icing method for de-icing composite overhead ground wire Download PDFInfo
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- CN103107503A CN103107503A CN2013100542195A CN201310054219A CN103107503A CN 103107503 A CN103107503 A CN 103107503A CN 2013100542195 A CN2013100542195 A CN 2013100542195A CN 201310054219 A CN201310054219 A CN 201310054219A CN 103107503 A CN103107503 A CN 103107503A
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- overhead ground
- ground wire
- icing
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Abstract
The invention discloses a self-circulation de-icing method for a de-icing composite overhead ground wire. In the prior art, a de-icing method that one overhead ground wire or two overhead ground wires in parallel connection is in series connection with a power transmission phase line is adopted, however, under the condition, a power transmission line must stop transmission. An achieving object of the method is the composite overhead ground wire. The composite overhead ground wire comprises an outer twisting layer, an inner twisting layer and a strand of insulating wire. The insulating wire is twisted in the inner twisting layer so that a circuit is formed through series connection of the insulating wire and any strand of outer layer aluminum coated steel wire in the outer twisting layer, short circuit is conducted at one end of a de-icing section and two electrodes of a direct current de-icing power source is connected with the other end of the de-icing section and a power transmission wire generates heat through direct current of the direct current de-icing power source. According to the de-icing composite overhead ground wire of one strand of the insulating wire, self-circulation deicing is achieved. The transmission of the power transmission line is not required to stop, series resistance of one strand of the insulating wire and one strand of the aluminum coated steel wire is not large, so that the requirement for the direct current de-icing power source is not high and achievement is easy.
Description
Technical field
The present invention relates to overhead ground wire de-icing technology field, but especially a kind of self-loopa de-icing method of ice-melt composite overhead ground wire.
Background technology
In recent years, large-area low-temperature freezing rain and snow disaster winter appearred in south China area again and again that cause because of climate change, the normal operation of electrical network had been caused very seriously influence.The broken string that the transmission pressure icing causes, short circuit, even the accident such as system splitting is long repair time to fall tower, and labor intensive is large.Wherein, in electrical network, the icing situation with ground wire is the most serious.Therefore, the anti-ice technology of ground wire has received increasing concern.
Transmission pressure DC ice melting technology is introduced in the overhead ground wire ice-melt, can adopt the method ice-melt of connecting with a transmission of electricity phase line after an overhead ground wire or two overhead ground wire parallel connections, but transmission line must be stopped transport in this case, bring greatly inconvenience for the scheduling of electrical network, can not satisfy the requirement of power supply reliability; Perhaps common overhead ground wire is connected to a side of ice-melt power supply, very high to the requirement of ice-melt power supply capacity because ground resistance is very large with the de-icing method in the earth formation loop, so uneconomical even unfeasible in practice; Simultaneously, with the ice-melt of simply connecting of two aluminium-clad steel wires in overhead ground wire, also its resistance value is large and be difficult to implement.
Summary of the invention
Technical problem to be solved by this invention is to overcome the defective that above-mentioned prior art exists, but provide a kind of self-loopa de-icing method of ice-melt composite overhead ground wire, when making ground wire deicing, transmission line does not need to stop transport and not high to the capacity requirement of DC ice melting power supply, is easy to realize.
for this reason, the present invention adopts following technical scheme: but a kind of self-loopa de-icing method of ice-melt composite overhead ground wire, it is characterized in that, the objective for implementation of this self-loopa de-icing method is a composite overhead ground wire, described composite overhead ground wire comprises outer twisted layer, interior twisted layer and one insulated conductor, described outer twisted layer is comprised of the outer aluminium-clad steel wire that multiply is circumferential distribution, described interior twisted layer is comprised of the unlined aluminium steel clad wire that multiply is circumferential distribution, described insulated conductor twists in interior twisted layer, insulated conductor is connected with arbitrary strand of outer aluminium-clad steel wire in outer twisted layer form a loop, at ice-melt Duan Yiduan short circuit, the two poles of the earth at another termination DC ice melting power supply of ice-melt section, direct current by the DC ice melting power supply makes transmission pressure (namely consisting of one outer aluminium-clad steel wire and one insulated conductor in loop) produce heat, thereby make the ice dissolution that covers on composite overhead ground wire.Ice-melt power supply output DC stream can be avoided the impact of circuit induction reactance, has reduced the requirement to the ice-melt power supply capacity.
Further, described insulated conductor is the copper conductor of surperficial wrap insulate layer, and the resistance of copper is less, and is not high to the capacity requirement of DC ice melting power supply, is easy to realize.The wire diameter of insulated conductor and the thickness of insulating barrier calculate according to thermal capacity, and it is withstand voltage that insulating barrier satisfies 10kV.
Further, described DC ice melting power supply is continuously adjustable power supply, adjusts period according to actual icing situation and ice-melt, thereby ice-melt time and energy loss are weighed optimization.
Further, connect and form a loop due to the outer aluminium-clad steel wire of one insulated conductor and one, the earthing mode of described composite overhead ground wire is necessary for insulation completely on the ice-melt section, and insulation completely can reduce circulation loss.
Further, be compounded with fiber unit in described composite overhead ground wire, utilize fiber unit to carry out optical fiber communication or optical fiber temperature-measurement.
Beneficial effect of the present invention is: the composite overhead ground wire that contains one insulated conductor has been realized the self-loopa ice-melt, and during ground wire deicing, transmission line does not need to stop transport; The series resistance of one insulated conductor and one aluminium-clad steel wire is little, and is not high to the capacity requirement of DC ice melting power supply, is easy to realize; Only contain one insulated conductor in composite overhead ground wire, very little on lightning protection effect and the mechanical performance impact of ground wire itself, do not need specially to improve designing requirement.
Description of drawings
Fig. 1 is the cross sectional representation of composite overhead ground wire of the present invention.
Fig. 2 is the winding diagram of composite overhead ground wire self-loopa de-icing method of the present invention, employing be ground wire earthing method of insulation completely on the ice-melt section.
In figure, 1-composite overhead ground wire, the outer aluminium-clad steel wire of 2-, 3-insulated conductor, 4, the 5-tower that continues, the strain insulator string of 6-band gap, 7-suspension insulator, 8-unlined aluminium steel clad wire, 9-center aluminium-clad steel wire, 10-DC ice melting power supply.
Embodiment
Below in conjunction with Figure of description, the present invention is described in further detail.
Composite overhead ground wire 1 as shown in Figure 1, it is formed by the center aluminium-clad steel wire 9 strand systems that 12 strands of outer aluminium-clad steel wires 2,5 strands of unlined aluminium steel clad wires 8,1 strand insulation wires 3 and are positioned at the ground wire center, 12 strands of outer aluminium-clad steel wires that are circumferential distribution form outer twisted layer, 5 strands of unlined aluminium steel clad wires that are circumferential distribution form interior twisted layer, and described one insulated conductor 3 strands enter in interior twisted layer.
The schematic diagram of operation method of the present invention as shown in Figure 2, in an ice-melt section, through several towers 4 that continue, the aluminium-clad steel wire 2 of composite overhead ground wire is by suspension insulator 7 and tower 4 insulation that continue with the composite overhead ground wire 1 of one insulated conductor 3.
Draw composite overhead ground wire 1 at tower 5 places of continuing by the strain insulator string 6 of band gap, insulated conductor 3 wherein and aluminium-clad steel wire 2 are at a side short circuit of ice-melt section, and opposite side is connected with the both positive and negative polarity of corresponding DC ice melting power supply.
Calculate maximum ice melting current and minimum ice melting current according to influencing factors such as line parameter circuit value, outside air temperature, air humidity, wind speed, select as required suitable ice melting current; It is continuously adjustable requiring the size of current of ice-melt DC power supply, can reasonably adjust according to the stage of icing situation and ice-melt, has simultaneously the effect of anti-ice and ice-melt, makes in ice-melt time and ice-melt power consumption to be optimized.
Claims (5)
1. but the self-loopa de-icing method of an ice-melt composite overhead ground wire, it is characterized in that, the objective for implementation of this self-loopa de-icing method is a composite overhead ground wire, described composite overhead ground wire comprises outer twisted layer, interior twisted layer and one insulated conductor, described outer twisted layer is comprised of the outer aluminium-clad steel wire that multiply is circumferential distribution, described interior twisted layer is comprised of the unlined aluminium steel clad wire that multiply is circumferential distribution, described insulated conductor twists in interior twisted layer, insulated conductor is connected with arbitrary strand of outer aluminium-clad steel wire in outer twisted layer form a loop, at ice-melt Duan Yiduan short circuit, the two poles of the earth at another termination DC ice melting power supply of ice-melt section, direct current by the DC ice melting power supply makes transmission pressure produce heat, thereby make the ice dissolution that covers on composite overhead ground wire.
2. but the self-loopa de-icing method of ice-melt composite overhead ground wire according to claim 1, it is characterized in that, described insulated conductor is the copper conductor of surperficial wrap insulate layer, and the wire diameter of insulated conductor and the thickness of insulating barrier calculate according to thermal capacity, and it is withstand voltage that insulating barrier satisfies 10kV.
3. but the self-loopa de-icing method of ice-melt composite overhead ground wire according to claim 1 and 2, it is characterized in that, described DC ice melting power supply is continuously adjustable power supply, adjusts period according to actual icing situation and ice-melt, thereby ice-melt time and energy loss are weighed optimization.
4. but the self-loopa de-icing method of ice-melt composite overhead ground wire according to claim 1 and 2, is characterized in that, the earthing mode of described composite overhead ground wire is insulation completely on the ice-melt section.
5. but the self-loopa de-icing method of ice-melt composite overhead ground wire according to claim 1 and 2, is characterized in that, is compounded with fiber unit in described composite overhead ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310054219.5A CN103107503B (en) | 2013-02-20 | 2013-02-20 | A kind of can the self-loopa de-icing method of ice-melt composite overhead ground wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310054219.5A CN103107503B (en) | 2013-02-20 | 2013-02-20 | A kind of can the self-loopa de-icing method of ice-melt composite overhead ground wire |
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| CN103107503A true CN103107503A (en) | 2013-05-15 |
| CN103107503B CN103107503B (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024335A (en) * | 2015-06-24 | 2015-11-04 | 国家电网公司 | OPGW (Optical Fiber Composite Overhead Ground Wire) DC ice melting monitoring system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008154438A (en) * | 2006-12-15 | 2008-07-03 | Michio Takaoka | Removal of snow and ice accretion on overhead transmission line |
| CN201251941Y (en) * | 2008-09-12 | 2009-06-03 | 程永忠 | Outer layer insulating single-line insulating round-line concentric stranded wire overhead line conductor and an automatic thawing apparatus |
| CN102915808A (en) * | 2012-11-14 | 2013-02-06 | 中天日立光缆有限公司 | Optical fiber composite overhead ground wire capable of melting ice |
-
2013
- 2013-02-20 CN CN201310054219.5A patent/CN103107503B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008154438A (en) * | 2006-12-15 | 2008-07-03 | Michio Takaoka | Removal of snow and ice accretion on overhead transmission line |
| CN201251941Y (en) * | 2008-09-12 | 2009-06-03 | 程永忠 | Outer layer insulating single-line insulating round-line concentric stranded wire overhead line conductor and an automatic thawing apparatus |
| CN102915808A (en) * | 2012-11-14 | 2013-02-06 | 中天日立光缆有限公司 | Optical fiber composite overhead ground wire capable of melting ice |
Non-Patent Citations (1)
| Title |
|---|
| 杨济海: "对抗覆冰光纤复合架空地线的思考", 《电力系统通信》, vol. 29, no. 191, 10 September 2008 (2008-09-10), pages 14 - 16 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024335A (en) * | 2015-06-24 | 2015-11-04 | 国家电网公司 | OPGW (Optical Fiber Composite Overhead Ground Wire) DC ice melting monitoring system |
| CN105024335B (en) * | 2015-06-24 | 2018-05-04 | 国家电网公司 | OPGW DC ice meltings monitor system |
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| Publication number | Publication date |
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| CN103107503B (en) | 2016-01-20 |
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Address after: Hangzhou City, Zhejiang province 310014 City Huadian Zhaohui Lane 1, a 6 storey building, 7 floor Patentee after: Zhejiang Huayun Electric Power Engineering Design Consulting Co., Ltd. Patentee after: Electric Power Economic Technology Research Institute, Zhejiang Electric Power Corporation Patentee after: Xi'an Jiaotong Univ. Patentee after: State Power Networks Co Address before: Hangzhou City, Zhejiang province 310014 City Huadian Zhaohui Lane 1, a 6 storey building, 7 floor Patentee before: Zhejiang Zhedian Economic Technology Research Institute Patentee before: Electric Power Economic Technology Research Institute, Zhejiang Electric Power Corporation Patentee before: Xi'an Jiaotong Univ. Patentee before: State Power Networks Co |